* [PATCH 0/3] kgdb 2.6.27 mips
@ 2008-07-18 17:08 Jason Wessel
2008-07-18 17:08 ` [PATCH 1/3] kgdb, mips: Remove existing kgdb implementation Jason Wessel
0 siblings, 1 reply; 12+ messages in thread
From: Jason Wessel @ 2008-07-18 17:08 UTC (permalink / raw)
To: linux-kernel; +Cc: ralf, linux-mips
This is a pretty significant change to kgdb mips in that it removes
the per board kgdb support to replace it with general kgdb
architecture support using the kernel's kgdb core architecture.
In the new model kgdb has no impact to the kernel's run time exceptions
or performance so long as no kgdb I/O driver is configured.
For boards that need specific uart drivers for kgdb, it should not be
too hard to add in kgdboc support as was done for the 8250 uart which
is supported by many of the mips specific boards already.
Jason Wessel (3):
kgdb, mips: Remove existing kgdb implementation
kgdb, mips: add arch support for the kernel's kgdb core
kgdb, mips: pad pt_regs on MIPS64 for function arguments in an exception
arch/mips/Kconfig | 7 +-
arch/mips/Kconfig.debug | 22 -
arch/mips/au1000/Kconfig | 1 -
arch/mips/au1000/common/Makefile | 1 -
arch/mips/au1000/common/dbg_io.c | 109 ---
arch/mips/basler/excite/Makefile | 1 -
arch/mips/basler/excite/excite_dbg_io.c | 121 ---
arch/mips/basler/excite/excite_irq.c | 7 -
arch/mips/basler/excite/excite_setup.c | 4 +-
arch/mips/configs/db1000_defconfig | 1 -
arch/mips/configs/db1100_defconfig | 1 -
arch/mips/configs/db1200_defconfig | 1 -
arch/mips/configs/db1500_defconfig | 1 -
arch/mips/configs/db1550_defconfig | 1 -
arch/mips/configs/excite_defconfig | 1 -
arch/mips/configs/ip27_defconfig | 1 -
arch/mips/configs/msp71xx_defconfig | 2 -
arch/mips/configs/mtx1_defconfig | 1 -
arch/mips/configs/pb1100_defconfig | 1 -
arch/mips/configs/pb1500_defconfig | 1 -
arch/mips/configs/pb1550_defconfig | 1 -
arch/mips/configs/pnx8550-jbs_defconfig | 4 +-
arch/mips/configs/pnx8550-stb810_defconfig | 4 +-
arch/mips/configs/rbtx49xx_defconfig | 1 -
arch/mips/configs/sb1250-swarm_defconfig | 1 -
arch/mips/configs/yosemite_defconfig | 2 -
arch/mips/kernel/Makefile | 2 +-
arch/mips/kernel/gdb-stub.c | 1155 ------------------------
arch/mips/kernel/irq.c | 30 +-
arch/mips/kernel/kgdb.c | 295 ++++++
arch/mips/kernel/{gdb-low.S => kgdb_handler.S} | 161 ++---
arch/mips/kernel/traps.c | 6 +
arch/mips/mti-malta/Makefile | 1 -
arch/mips/mti-malta/malta-init.c | 54 --
arch/mips/mti-malta/malta-kgdb.c | 133 ---
arch/mips/mti-malta/malta-setup.c | 4 -
arch/mips/nxp/pnx8550/common/Makefile | 1 -
arch/mips/nxp/pnx8550/common/gdb_hook.c | 109 ---
arch/mips/nxp/pnx8550/common/setup.c | 12 -
arch/mips/pmc-sierra/msp71xx/msp_serial.c | 73 --
arch/mips/pmc-sierra/yosemite/Makefile | 1 -
arch/mips/pmc-sierra/yosemite/dbg_io.c | 180 ----
arch/mips/pmc-sierra/yosemite/irq.c | 9 -
arch/mips/sgi-ip22/ip22-setup.c | 24 -
arch/mips/sgi-ip27/Makefile | 1 -
arch/mips/sgi-ip27/ip27-dbgio.c | 60 --
arch/mips/sibyte/bcm1480/irq.c | 80 --
arch/mips/sibyte/cfe/setup.c | 14 -
arch/mips/sibyte/sb1250/irq.c | 60 --
arch/mips/sibyte/swarm/Makefile | 1 -
arch/mips/sibyte/swarm/dbg_io.c | 76 --
arch/mips/txx9/Kconfig | 2 -
arch/mips/txx9/generic/Makefile | 1 -
arch/mips/txx9/generic/dbgio.c | 48 -
arch/mips/txx9/jmr3927/Makefile | 1 -
arch/mips/txx9/jmr3927/kgdb_io.c | 105 ---
include/asm-mips/asmmacro-32.h | 43 +
include/asm-mips/asmmacro-64.h | 99 ++
include/asm-mips/kgdb.h | 54 ++
include/asm-mips/ptrace.h | 2 +-
60 files changed, 569 insertions(+), 2626 deletions(-)
delete mode 100644 arch/mips/au1000/common/dbg_io.c
delete mode 100644 arch/mips/basler/excite/excite_dbg_io.c
delete mode 100644 arch/mips/kernel/gdb-stub.c
create mode 100644 arch/mips/kernel/kgdb.c
rename arch/mips/kernel/{gdb-low.S => kgdb_handler.S} (68%)
delete mode 100644 arch/mips/mti-malta/malta-kgdb.c
delete mode 100644 arch/mips/nxp/pnx8550/common/gdb_hook.c
delete mode 100644 arch/mips/pmc-sierra/yosemite/dbg_io.c
delete mode 100644 arch/mips/sgi-ip27/ip27-dbgio.c
delete mode 100644 arch/mips/sibyte/swarm/dbg_io.c
delete mode 100644 arch/mips/txx9/generic/dbgio.c
delete mode 100644 arch/mips/txx9/jmr3927/kgdb_io.c
create mode 100644 include/asm-mips/kgdb.h
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH 1/3] kgdb, mips: Remove existing kgdb implementation
2008-07-18 17:08 [PATCH 0/3] kgdb 2.6.27 mips Jason Wessel
@ 2008-07-18 17:08 ` Jason Wessel
2008-07-18 17:08 ` [PATCH 2/3] kgdb, mips: add arch support for the kernel's kgdb core Jason Wessel
0 siblings, 1 reply; 12+ messages in thread
From: Jason Wessel @ 2008-07-18 17:08 UTC (permalink / raw)
To: linux-kernel; +Cc: ralf, linux-mips, Jason Wessel
This patch explicitly removes the kgdb implementation, for mips which
is intended to be followed by a patch that adds a kgdb implementation
for mips that makes use of the kgdb core in the kernel.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
---
arch/mips/Kconfig | 6 -
arch/mips/Kconfig.debug | 22 -
arch/mips/au1000/Kconfig | 1 -
arch/mips/au1000/common/Makefile | 1 -
arch/mips/au1000/common/dbg_io.c | 109 ---
arch/mips/basler/excite/Makefile | 1 -
arch/mips/basler/excite/excite_dbg_io.c | 121 ---
arch/mips/basler/excite/excite_irq.c | 7 -
arch/mips/basler/excite/excite_setup.c | 4 +-
arch/mips/configs/db1000_defconfig | 1 -
arch/mips/configs/db1100_defconfig | 1 -
arch/mips/configs/db1200_defconfig | 1 -
arch/mips/configs/db1500_defconfig | 1 -
arch/mips/configs/db1550_defconfig | 1 -
arch/mips/configs/excite_defconfig | 1 -
arch/mips/configs/ip27_defconfig | 1 -
arch/mips/configs/msp71xx_defconfig | 2 -
arch/mips/configs/mtx1_defconfig | 1 -
arch/mips/configs/pb1100_defconfig | 1 -
arch/mips/configs/pb1500_defconfig | 1 -
arch/mips/configs/pb1550_defconfig | 1 -
arch/mips/configs/pnx8550-jbs_defconfig | 4 +-
arch/mips/configs/pnx8550-stb810_defconfig | 4 +-
arch/mips/configs/rbtx49xx_defconfig | 1 -
arch/mips/configs/sb1250-swarm_defconfig | 1 -
arch/mips/configs/yosemite_defconfig | 2 -
arch/mips/kernel/Makefile | 1 -
arch/mips/kernel/gdb-low.S | 394 ----------
arch/mips/kernel/gdb-stub.c | 1155 ----------------------------
arch/mips/kernel/irq.c | 21 -
arch/mips/mti-malta/Makefile | 1 -
arch/mips/mti-malta/malta-init.c | 54 --
arch/mips/mti-malta/malta-kgdb.c | 133 ----
arch/mips/mti-malta/malta-setup.c | 4 -
arch/mips/nxp/pnx8550/common/Makefile | 1 -
arch/mips/nxp/pnx8550/common/gdb_hook.c | 109 ---
arch/mips/nxp/pnx8550/common/setup.c | 12 -
arch/mips/pmc-sierra/msp71xx/msp_serial.c | 73 --
arch/mips/pmc-sierra/yosemite/Makefile | 1 -
arch/mips/pmc-sierra/yosemite/dbg_io.c | 180 -----
arch/mips/pmc-sierra/yosemite/irq.c | 9 -
arch/mips/sgi-ip22/ip22-setup.c | 24 -
arch/mips/sgi-ip27/Makefile | 1 -
arch/mips/sgi-ip27/ip27-dbgio.c | 60 --
arch/mips/sibyte/bcm1480/irq.c | 80 --
arch/mips/sibyte/cfe/setup.c | 14 -
arch/mips/sibyte/sb1250/irq.c | 60 --
arch/mips/sibyte/swarm/Makefile | 1 -
arch/mips/sibyte/swarm/dbg_io.c | 76 --
arch/mips/txx9/Kconfig | 2 -
arch/mips/txx9/generic/Makefile | 1 -
arch/mips/txx9/generic/dbgio.c | 48 --
arch/mips/txx9/jmr3927/Makefile | 1 -
arch/mips/txx9/jmr3927/kgdb_io.c | 105 ---
54 files changed, 4 insertions(+), 2914 deletions(-)
delete mode 100644 arch/mips/au1000/common/dbg_io.c
delete mode 100644 arch/mips/basler/excite/excite_dbg_io.c
delete mode 100644 arch/mips/kernel/gdb-low.S
delete mode 100644 arch/mips/kernel/gdb-stub.c
delete mode 100644 arch/mips/mti-malta/malta-kgdb.c
delete mode 100644 arch/mips/nxp/pnx8550/common/gdb_hook.c
delete mode 100644 arch/mips/pmc-sierra/yosemite/dbg_io.c
delete mode 100644 arch/mips/sgi-ip27/ip27-dbgio.c
delete mode 100644 arch/mips/sibyte/swarm/dbg_io.c
delete mode 100644 arch/mips/txx9/generic/dbgio.c
delete mode 100644 arch/mips/txx9/jmr3927/kgdb_io.c
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index d21df5f..1c07cb9 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -34,7 +34,6 @@ config BASLER_EXCITE
select SYS_HAS_CPU_RM9000
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
- select SYS_SUPPORTS_KGDB
help
The eXcite is a smart camera platform manufactured by
Basler Vision Technologies AG.
@@ -280,7 +279,6 @@ config PMC_MSP
select SYS_HAS_CPU_MIPS32_R2
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
- select SYS_SUPPORTS_KGDB
select IRQ_CPU
select SERIAL_8250
select SERIAL_8250_CONSOLE
@@ -306,7 +304,6 @@ config PMC_YOSEMITE
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_HIGHMEM
- select SYS_SUPPORTS_KGDB
select SYS_SUPPORTS_SMP
help
Yosemite is an evaluation board for the RM9000x2 processor
@@ -358,7 +355,6 @@ config SGI_IP27
select SYS_HAS_CPU_R10000
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_BIG_ENDIAN
- select SYS_SUPPORTS_KGDB
select SYS_SUPPORTS_NUMA
select SYS_SUPPORTS_SMP
select GENERIC_HARDIRQS_NO__DO_IRQ
@@ -475,7 +471,6 @@ config SIBYTE_SWARM
select SYS_HAS_CPU_SB1
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_HIGHMEM
- select SYS_SUPPORTS_KGDB
select SYS_SUPPORTS_LITTLE_ENDIAN
select ZONE_DMA32 if 64BIT
@@ -850,7 +845,6 @@ config SOC_PNX8550
select SYS_HAS_EARLY_PRINTK
select SYS_SUPPORTS_32BIT_KERNEL
select GENERIC_HARDIRQS_NO__DO_IRQ
- select SYS_SUPPORTS_KGDB
select GENERIC_GPIO
config SWAP_IO_SPACE
diff --git a/arch/mips/Kconfig.debug b/arch/mips/Kconfig.debug
index f18cf92..765c8e2 100644
--- a/arch/mips/Kconfig.debug
+++ b/arch/mips/Kconfig.debug
@@ -34,28 +34,6 @@ config SMTC_IDLE_HOOK_DEBUG
arch/mips/kernel/smtc.c. This debugging option result in significant
overhead so should be disabled in production kernels.
-config KGDB
- bool "Remote GDB kernel debugging"
- depends on DEBUG_KERNEL && SYS_SUPPORTS_KGDB
- select DEBUG_INFO
- help
- If you say Y here, it will be possible to remotely debug the MIPS
- kernel using gdb. This enlarges your kernel image disk size by
- several megabytes and requires a machine with more than 16 MB,
- better 32 MB RAM to avoid excessive linking time. This is only
- useful for kernel hackers. If unsure, say N.
-
-config SYS_SUPPORTS_KGDB
- bool
-
-config GDB_CONSOLE
- bool "Console output to GDB"
- depends on KGDB
- help
- If you are using GDB for remote debugging over a serial port and
- would like kernel messages to be formatted into GDB $O packets so
- that GDB prints them as program output, say 'Y'.
-
config SB1XXX_CORELIS
bool "Corelis Debugger"
depends on SIBYTE_SB1xxx_SOC
diff --git a/arch/mips/au1000/Kconfig b/arch/mips/au1000/Kconfig
index 1fe97cc..e4a057d 100644
--- a/arch/mips/au1000/Kconfig
+++ b/arch/mips/au1000/Kconfig
@@ -134,4 +134,3 @@ config SOC_AU1X00
select SYS_HAS_CPU_MIPS32_R1
select SYS_SUPPORTS_32BIT_KERNEL
select SYS_SUPPORTS_APM_EMULATION
- select SYS_SUPPORTS_KGDB
diff --git a/arch/mips/au1000/common/Makefile b/arch/mips/au1000/common/Makefile
index dd0e19d..df48fd6 100644
--- a/arch/mips/au1000/common/Makefile
+++ b/arch/mips/au1000/common/Makefile
@@ -9,7 +9,6 @@ obj-y += prom.o irq.o puts.o time.o reset.o \
au1xxx_irqmap.o clocks.o platform.o power.o setup.o \
sleeper.o cputable.o dma.o dbdma.o gpio.o
-obj-$(CONFIG_KGDB) += dbg_io.o
obj-$(CONFIG_PCI) += pci.o
EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/au1000/common/dbg_io.c b/arch/mips/au1000/common/dbg_io.c
deleted file mode 100644
index af5be7d..0000000
--- a/arch/mips/au1000/common/dbg_io.c
+++ /dev/null
@@ -1,109 +0,0 @@
-#include <linux/types.h>
-
-#include <asm/mach-au1x00/au1000.h>
-
-#ifdef CONFIG_KGDB
-
-/*
- * FIXME the user should be able to select the
- * uart to be used for debugging.
- */
-#define DEBUG_BASE UART_DEBUG_BASE
-
-#define UART16550_BAUD_2400 2400
-#define UART16550_BAUD_4800 4800
-#define UART16550_BAUD_9600 9600
-#define UART16550_BAUD_19200 19200
-#define UART16550_BAUD_38400 38400
-#define UART16550_BAUD_57600 57600
-#define UART16550_BAUD_115200 115200
-
-#define UART16550_PARITY_NONE 0
-#define UART16550_PARITY_ODD 0x08
-#define UART16550_PARITY_EVEN 0x18
-#define UART16550_PARITY_MARK 0x28
-#define UART16550_PARITY_SPACE 0x38
-
-#define UART16550_DATA_5BIT 0x0
-#define UART16550_DATA_6BIT 0x1
-#define UART16550_DATA_7BIT 0x2
-#define UART16550_DATA_8BIT 0x3
-
-#define UART16550_STOP_1BIT 0x0
-#define UART16550_STOP_2BIT 0x4
-
-
-#define UART_RX 0 /* Receive buffer */
-#define UART_TX 4 /* Transmit buffer */
-#define UART_IER 8 /* Interrupt Enable Register */
-#define UART_IIR 0xC /* Interrupt ID Register */
-#define UART_FCR 0x10 /* FIFO Control Register */
-#define UART_LCR 0x14 /* Line Control Register */
-#define UART_MCR 0x18 /* Modem Control Register */
-#define UART_LSR 0x1C /* Line Status Register */
-#define UART_MSR 0x20 /* Modem Status Register */
-#define UART_CLK 0x28 /* Baud Rat4e Clock Divider */
-#define UART_MOD_CNTRL 0x100 /* Module Control */
-
-/* memory-mapped read/write of the port */
-#define UART16550_READ(y) (au_readl(DEBUG_BASE + y) & 0xff)
-#define UART16550_WRITE(y, z) (au_writel(z & 0xff, DEBUG_BASE + y))
-
-extern unsigned long calc_clock(void);
-
-void debugInit(u32 baud, u8 data, u8 parity, u8 stop)
-{
- if (UART16550_READ(UART_MOD_CNTRL) != 0x3)
- UART16550_WRITE(UART_MOD_CNTRL, 3);
- calc_clock();
-
- /* disable interrupts */
- UART16550_WRITE(UART_IER, 0);
-
- /* set up baud rate */
- {
- u32 divisor;
-
- /* set divisor */
- divisor = get_au1x00_uart_baud_base() / baud;
- UART16550_WRITE(UART_CLK, divisor & 0xffff);
- }
-
- /* set data format */
- UART16550_WRITE(UART_LCR, (data | parity | stop));
-}
-
-static int remoteDebugInitialized;
-
-u8 getDebugChar(void)
-{
- if (!remoteDebugInitialized) {
- remoteDebugInitialized = 1;
- debugInit(UART16550_BAUD_115200,
- UART16550_DATA_8BIT,
- UART16550_PARITY_NONE,
- UART16550_STOP_1BIT);
- }
-
- while ((UART16550_READ(UART_LSR) & 0x1) == 0);
- return UART16550_READ(UART_RX);
-}
-
-
-int putDebugChar(u8 byte)
-{
- if (!remoteDebugInitialized) {
- remoteDebugInitialized = 1;
- debugInit(UART16550_BAUD_115200,
- UART16550_DATA_8BIT,
- UART16550_PARITY_NONE,
- UART16550_STOP_1BIT);
- }
-
- while ((UART16550_READ(UART_LSR) & 0x40) == 0);
- UART16550_WRITE(UART_TX, byte);
-
- return 1;
-}
-
-#endif
diff --git a/arch/mips/basler/excite/Makefile b/arch/mips/basler/excite/Makefile
index 519142c..cff29cf 100644
--- a/arch/mips/basler/excite/Makefile
+++ b/arch/mips/basler/excite/Makefile
@@ -5,5 +5,4 @@
obj-$(CONFIG_BASLER_EXCITE) += excite_irq.o excite_prom.o excite_setup.o \
excite_device.o excite_procfs.o
-obj-$(CONFIG_KGDB) += excite_dbg_io.o
obj-m += excite_iodev.o
diff --git a/arch/mips/basler/excite/excite_dbg_io.c b/arch/mips/basler/excite/excite_dbg_io.c
deleted file mode 100644
index d289e3a..0000000
--- a/arch/mips/basler/excite/excite_dbg_io.c
+++ /dev/null
@@ -1,121 +0,0 @@
-/*
- * Copyright (C) 2004 by Basler Vision Technologies AG
- * Author: Thomas Koeller <thomas.koeller@baslerweb.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include <linux/linkage.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <asm/gdb-stub.h>
-#include <asm/rm9k-ocd.h>
-#include <excite.h>
-
-#if defined(CONFIG_SERIAL_8250) && CONFIG_SERIAL_8250_NR_UARTS > 1
-#error Debug port used by serial driver
-#endif
-
-#define UART_CLK 25000000
-#define BASE_BAUD (UART_CLK / 16)
-#define REGISTER_BASE_0 0x0208UL
-#define REGISTER_BASE_1 0x0238UL
-
-#define REGISTER_BASE_DBG REGISTER_BASE_1
-
-#define CPRR 0x0004
-#define UACFG 0x0200
-#define UAINTS 0x0204
-#define UARBR (REGISTER_BASE_DBG + 0x0000)
-#define UATHR (REGISTER_BASE_DBG + 0x0004)
-#define UADLL (REGISTER_BASE_DBG + 0x0008)
-#define UAIER (REGISTER_BASE_DBG + 0x000c)
-#define UADLH (REGISTER_BASE_DBG + 0x0010)
-#define UAIIR (REGISTER_BASE_DBG + 0x0014)
-#define UAFCR (REGISTER_BASE_DBG + 0x0018)
-#define UALCR (REGISTER_BASE_DBG + 0x001c)
-#define UAMCR (REGISTER_BASE_DBG + 0x0020)
-#define UALSR (REGISTER_BASE_DBG + 0x0024)
-#define UAMSR (REGISTER_BASE_DBG + 0x0028)
-#define UASCR (REGISTER_BASE_DBG + 0x002c)
-
-#define PARITY_NONE 0
-#define PARITY_ODD 0x08
-#define PARITY_EVEN 0x18
-#define PARITY_MARK 0x28
-#define PARITY_SPACE 0x38
-
-#define DATA_5BIT 0x0
-#define DATA_6BIT 0x1
-#define DATA_7BIT 0x2
-#define DATA_8BIT 0x3
-
-#define STOP_1BIT 0x0
-#define STOP_2BIT 0x4
-
-#define BAUD_DBG 57600
-#define PARITY_DBG PARITY_NONE
-#define DATA_DBG DATA_8BIT
-#define STOP_DBG STOP_1BIT
-
-/* Initialize the serial port for KGDB debugging */
-void __init excite_kgdb_init(void)
-{
- const u32 divisor = BASE_BAUD / BAUD_DBG;
-
- /* Take the UART out of reset */
- titan_writel(0x00ff1cff, CPRR);
- titan_writel(0x00000000, UACFG);
- titan_writel(0x00000002, UACFG);
-
- titan_writel(0x0, UALCR);
- titan_writel(0x0, UAIER);
-
- /* Disable FIFOs */
- titan_writel(0x00, UAFCR);
-
- titan_writel(0x80, UALCR);
- titan_writel(divisor & 0xff, UADLL);
- titan_writel((divisor & 0xff00) >> 8, UADLH);
- titan_writel(0x0, UALCR);
-
- titan_writel(DATA_DBG | PARITY_DBG | STOP_DBG, UALCR);
-
- /* Enable receiver interrupt */
- titan_readl(UARBR);
- titan_writel(0x1, UAIER);
-}
-
-int getDebugChar(void)
-{
- while (!(titan_readl(UALSR) & 0x1));
- return titan_readl(UARBR);
-}
-
-int putDebugChar(int data)
-{
- while (!(titan_readl(UALSR) & 0x20));
- titan_writel(data, UATHR);
- return 1;
-}
-
-/* KGDB interrupt handler */
-asmlinkage void excite_kgdb_inthdl(void)
-{
- if (unlikely(
- ((titan_readl(UAIIR) & 0x7) == 4)
- && ((titan_readl(UARBR) & 0xff) == 0x3)))
- set_async_breakpoint(®s->cp0_epc);
-}
diff --git a/arch/mips/basler/excite/excite_irq.c b/arch/mips/basler/excite/excite_irq.c
index 4903e06..934e0a6 100644
--- a/arch/mips/basler/excite/excite_irq.c
+++ b/arch/mips/basler/excite/excite_irq.c
@@ -50,10 +50,6 @@ void __init arch_init_irq(void)
mips_cpu_irq_init();
rm7k_cpu_irq_init();
rm9k_cpu_irq_init();
-
-#ifdef CONFIG_KGDB
- excite_kgdb_init();
-#endif
}
asmlinkage void plat_irq_dispatch(void)
@@ -90,9 +86,6 @@ asmlinkage void plat_irq_dispatch(void)
msgint = msgintflags & msgintmask & (0x1 << (TITAN_MSGINT % 0x20));
if ((pending & (1 << TITAN_IRQ)) && msgint) {
ocd_writel(msgint, INTP0Clear0 + (TITAN_MSGINT / 0x20 * 0x10));
-#if defined(CONFIG_KGDB)
- excite_kgdb_inthdl();
-#endif
do_IRQ(TITAN_IRQ);
return;
}
diff --git a/arch/mips/basler/excite/excite_setup.c b/arch/mips/basler/excite/excite_setup.c
index 6dd8f0d..d66b3b8 100644
--- a/arch/mips/basler/excite/excite_setup.c
+++ b/arch/mips/basler/excite/excite_setup.c
@@ -95,13 +95,13 @@ static int __init excite_init_console(void)
/* Take the DUART out of reset */
titan_writel(0x00ff1cff, CPRR);
-#if defined(CONFIG_KGDB) || (CONFIG_SERIAL_8250_NR_UARTS > 1)
+#if (CONFIG_SERIAL_8250_NR_UARTS > 1)
/* Enable both ports */
titan_writel(MASK_SER0 | MASK_SER1, UACFG);
#else
/* Enable port #0 only */
titan_writel(MASK_SER0, UACFG);
-#endif /* defined(CONFIG_KGDB) */
+#endif
/*
* Set up serial port #0. Do not use autodetection; the result is
diff --git a/arch/mips/configs/db1000_defconfig b/arch/mips/configs/db1000_defconfig
index ebb8ad6..a279165 100644
--- a/arch/mips/configs/db1000_defconfig
+++ b/arch/mips/configs/db1000_defconfig
@@ -1092,7 +1092,6 @@ CONFIG_ENABLE_MUST_CHECK=y
CONFIG_LOG_BUF_SHIFT=14
CONFIG_CROSSCOMPILE=y
CONFIG_CMDLINE=""
-CONFIG_SYS_SUPPORTS_KGDB=y
#
# Security options
diff --git a/arch/mips/configs/db1100_defconfig b/arch/mips/configs/db1100_defconfig
index ad4e5ef..8944d15 100644
--- a/arch/mips/configs/db1100_defconfig
+++ b/arch/mips/configs/db1100_defconfig
@@ -1092,7 +1092,6 @@ CONFIG_ENABLE_MUST_CHECK=y
CONFIG_LOG_BUF_SHIFT=14
CONFIG_CROSSCOMPILE=y
CONFIG_CMDLINE=""
-CONFIG_SYS_SUPPORTS_KGDB=y
#
# Security options
diff --git a/arch/mips/configs/db1200_defconfig b/arch/mips/configs/db1200_defconfig
index d0dc2e8..ab17973 100644
--- a/arch/mips/configs/db1200_defconfig
+++ b/arch/mips/configs/db1200_defconfig
@@ -1174,7 +1174,6 @@ CONFIG_ENABLE_MUST_CHECK=y
CONFIG_LOG_BUF_SHIFT=14
CONFIG_CROSSCOMPILE=y
CONFIG_CMDLINE="mem=48M"
-CONFIG_SYS_SUPPORTS_KGDB=y
#
# Security options
diff --git a/arch/mips/configs/db1500_defconfig b/arch/mips/configs/db1500_defconfig
index 9155082..b65803f 100644
--- a/arch/mips/configs/db1500_defconfig
+++ b/arch/mips/configs/db1500_defconfig
@@ -1392,7 +1392,6 @@ CONFIG_ENABLE_MUST_CHECK=y
CONFIG_LOG_BUF_SHIFT=14
CONFIG_CROSSCOMPILE=y
CONFIG_CMDLINE=""
-CONFIG_SYS_SUPPORTS_KGDB=y
#
# Security options
diff --git a/arch/mips/configs/db1550_defconfig b/arch/mips/configs/db1550_defconfig
index e4e3244..a190ac0 100644
--- a/arch/mips/configs/db1550_defconfig
+++ b/arch/mips/configs/db1550_defconfig
@@ -1209,7 +1209,6 @@ CONFIG_ENABLE_MUST_CHECK=y
CONFIG_LOG_BUF_SHIFT=14
CONFIG_CROSSCOMPILE=y
CONFIG_CMDLINE=""
-CONFIG_SYS_SUPPORTS_KGDB=y
#
# Security options
diff --git a/arch/mips/configs/excite_defconfig b/arch/mips/configs/excite_defconfig
index 3572e80..4e465e9 100644
--- a/arch/mips/configs/excite_defconfig
+++ b/arch/mips/configs/excite_defconfig
@@ -1269,7 +1269,6 @@ CONFIG_ENABLE_MUST_CHECK=y
CONFIG_LOG_BUF_SHIFT=14
CONFIG_CROSSCOMPILE=y
CONFIG_CMDLINE=""
-CONFIG_SYS_SUPPORTS_KGDB=y
#
# Security options
diff --git a/arch/mips/configs/ip27_defconfig b/arch/mips/configs/ip27_defconfig
index 138c575..831d3e5 100644
--- a/arch/mips/configs/ip27_defconfig
+++ b/arch/mips/configs/ip27_defconfig
@@ -943,7 +943,6 @@ CONFIG_ENABLE_MUST_CHECK=y
# CONFIG_DEBUG_KERNEL is not set
CONFIG_CROSSCOMPILE=y
CONFIG_CMDLINE=""
-CONFIG_SYS_SUPPORTS_KGDB=y
#
# Security options
diff --git a/arch/mips/configs/msp71xx_defconfig b/arch/mips/configs/msp71xx_defconfig
index 59d1947..dd13db4 100644
--- a/arch/mips/configs/msp71xx_defconfig
+++ b/arch/mips/configs/msp71xx_defconfig
@@ -1415,8 +1415,6 @@ CONFIG_FORCED_INLINING=y
CONFIG_CROSSCOMPILE=y
CONFIG_CMDLINE=""
# CONFIG_DEBUG_STACK_USAGE is not set
-# CONFIG_KGDB is not set
-CONFIG_SYS_SUPPORTS_KGDB=y
# CONFIG_RUNTIME_DEBUG is not set
# CONFIG_MIPS_UNCACHED is not set
diff --git a/arch/mips/configs/mtx1_defconfig b/arch/mips/configs/mtx1_defconfig
index bacf0dd..db92726 100644
--- a/arch/mips/configs/mtx1_defconfig
+++ b/arch/mips/configs/mtx1_defconfig
@@ -3020,7 +3020,6 @@ CONFIG_MAGIC_SYSRQ=y
# CONFIG_DEBUG_KERNEL is not set
CONFIG_CROSSCOMPILE=y
CONFIG_CMDLINE=""
-CONFIG_SYS_SUPPORTS_KGDB=y
#
# Security options
diff --git a/arch/mips/configs/pb1100_defconfig b/arch/mips/configs/pb1100_defconfig
index 6dfe6f7..9e21e33 100644
--- a/arch/mips/configs/pb1100_defconfig
+++ b/arch/mips/configs/pb1100_defconfig
@@ -1085,7 +1085,6 @@ CONFIG_ENABLE_MUST_CHECK=y
CONFIG_LOG_BUF_SHIFT=14
CONFIG_CROSSCOMPILE=y
CONFIG_CMDLINE=""
-CONFIG_SYS_SUPPORTS_KGDB=y
#
# Security options
diff --git a/arch/mips/configs/pb1500_defconfig b/arch/mips/configs/pb1500_defconfig
index c965a87..af67ed4 100644
--- a/arch/mips/configs/pb1500_defconfig
+++ b/arch/mips/configs/pb1500_defconfig
@@ -1202,7 +1202,6 @@ CONFIG_ENABLE_MUST_CHECK=y
CONFIG_LOG_BUF_SHIFT=14
CONFIG_CROSSCOMPILE=y
CONFIG_CMDLINE=""
-CONFIG_SYS_SUPPORTS_KGDB=y
#
# Security options
diff --git a/arch/mips/configs/pb1550_defconfig b/arch/mips/configs/pb1550_defconfig
index 0778996..7956f56 100644
--- a/arch/mips/configs/pb1550_defconfig
+++ b/arch/mips/configs/pb1550_defconfig
@@ -1195,7 +1195,6 @@ CONFIG_ENABLE_MUST_CHECK=y
CONFIG_LOG_BUF_SHIFT=14
CONFIG_CROSSCOMPILE=y
CONFIG_CMDLINE=""
-CONFIG_SYS_SUPPORTS_KGDB=y
#
# Security options
diff --git a/arch/mips/configs/pnx8550-jbs_defconfig b/arch/mips/configs/pnx8550-jbs_defconfig
index 37c7b5f..723bd51 100644
--- a/arch/mips/configs/pnx8550-jbs_defconfig
+++ b/arch/mips/configs/pnx8550-jbs_defconfig
@@ -1216,10 +1216,8 @@ CONFIG_DEBUG_MUTEXES=y
CONFIG_FORCED_INLINING=y
# CONFIG_RCU_TORTURE_TEST is not set
CONFIG_CROSSCOMPILE=y
-CONFIG_CMDLINE="console=ttyS1,38400n8 kgdb=ttyS0 root=/dev/nfs ip=bootp"
+CONFIG_CMDLINE="console=ttyS1,38400n8 root=/dev/nfs ip=bootp"
# CONFIG_DEBUG_STACK_USAGE is not set
-# CONFIG_KGDB is not set
-CONFIG_SYS_SUPPORTS_KGDB=y
# CONFIG_RUNTIME_DEBUG is not set
#
diff --git a/arch/mips/configs/pnx8550-stb810_defconfig b/arch/mips/configs/pnx8550-stb810_defconfig
index 893e5c4..b5052fb 100644
--- a/arch/mips/configs/pnx8550-stb810_defconfig
+++ b/arch/mips/configs/pnx8550-stb810_defconfig
@@ -1206,10 +1206,8 @@ CONFIG_DEBUG_SLAB=y
CONFIG_FORCED_INLINING=y
# CONFIG_RCU_TORTURE_TEST is not set
CONFIG_CROSSCOMPILE=y
-CONFIG_CMDLINE="console=ttyS1,38400n8 kgdb=ttyS0 root=/dev/nfs ip=bootp"
+CONFIG_CMDLINE="console=ttyS1,38400n8 root=/dev/nfs ip=bootp"
# CONFIG_DEBUG_STACK_USAGE is not set
-# CONFIG_KGDB is not set
-CONFIG_SYS_SUPPORTS_KGDB=y
# CONFIG_RUNTIME_DEBUG is not set
#
diff --git a/arch/mips/configs/rbtx49xx_defconfig b/arch/mips/configs/rbtx49xx_defconfig
index e42aed5..c7c0864 100644
--- a/arch/mips/configs/rbtx49xx_defconfig
+++ b/arch/mips/configs/rbtx49xx_defconfig
@@ -742,7 +742,6 @@ CONFIG_DEBUG_FS=y
# CONFIG_DEBUG_KERNEL is not set
# CONFIG_SAMPLES is not set
CONFIG_CMDLINE=""
-CONFIG_SYS_SUPPORTS_KGDB=y
#
# Security options
diff --git a/arch/mips/configs/sb1250-swarm_defconfig b/arch/mips/configs/sb1250-swarm_defconfig
index 1ea9786..a9acaa2 100644
--- a/arch/mips/configs/sb1250-swarm_defconfig
+++ b/arch/mips/configs/sb1250-swarm_defconfig
@@ -963,7 +963,6 @@ CONFIG_ENABLE_MUST_CHECK=y
# CONFIG_DEBUG_KERNEL is not set
# CONFIG_SAMPLES is not set
CONFIG_CMDLINE=""
-CONFIG_SYS_SUPPORTS_KGDB=y
# CONFIG_SB1XXX_CORELIS is not set
#
diff --git a/arch/mips/configs/yosemite_defconfig b/arch/mips/configs/yosemite_defconfig
index 7f86c43..ea8249c 100644
--- a/arch/mips/configs/yosemite_defconfig
+++ b/arch/mips/configs/yosemite_defconfig
@@ -827,8 +827,6 @@ CONFIG_FORCED_INLINING=y
CONFIG_CROSSCOMPILE=y
CONFIG_CMDLINE=""
# CONFIG_DEBUG_STACK_USAGE is not set
-# CONFIG_KGDB is not set
-CONFIG_SYS_SUPPORTS_KGDB=y
# CONFIG_RUNTIME_DEBUG is not set
#
diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index 0fd3197..73ff048 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -71,7 +71,6 @@ obj-$(CONFIG_MIPS32_COMPAT) += linux32.o ptrace32.o signal32.o
obj-$(CONFIG_MIPS32_N32) += binfmt_elfn32.o scall64-n32.o signal_n32.o
obj-$(CONFIG_MIPS32_O32) += binfmt_elfo32.o scall64-o32.o
-obj-$(CONFIG_KGDB) += gdb-low.o gdb-stub.o
obj-$(CONFIG_PROC_FS) += proc.o
obj-$(CONFIG_64BIT) += cpu-bugs64.o
diff --git a/arch/mips/kernel/gdb-low.S b/arch/mips/kernel/gdb-low.S
deleted file mode 100644
index 2c44606..0000000
--- a/arch/mips/kernel/gdb-low.S
+++ /dev/null
@@ -1,394 +0,0 @@
-/*
- * gdb-low.S contains the low-level trap handler for the GDB stub.
- *
- * Copyright (C) 1995 Andreas Busse
- */
-#include <linux/sys.h>
-
-#include <asm/asm.h>
-#include <asm/errno.h>
-#include <asm/irqflags.h>
-#include <asm/mipsregs.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-#include <asm/gdb-stub.h>
-
-#ifdef CONFIG_32BIT
-#define DMFC0 mfc0
-#define DMTC0 mtc0
-#define LDC1 lwc1
-#define SDC1 lwc1
-#endif
-#ifdef CONFIG_64BIT
-#define DMFC0 dmfc0
-#define DMTC0 dmtc0
-#define LDC1 ldc1
-#define SDC1 ldc1
-#endif
-
-/*
- * [jsun] We reserves about 2x GDB_FR_SIZE in stack. The lower (addressed)
- * part is used to store registers and passed to exception handler.
- * The upper part is reserved for "call func" feature where gdb client
- * saves some of the regs, setups call frame and passes args.
- *
- * A trace shows about 200 bytes are used to store about half of all regs.
- * The rest should be big enough for frame setup and passing args.
- */
-
-/*
- * The low level trap handler
- */
- .align 5
- NESTED(trap_low, GDB_FR_SIZE, sp)
- .set noat
- .set noreorder
-
- mfc0 k0, CP0_STATUS
- sll k0, 3 /* extract cu0 bit */
- bltz k0, 1f
- move k1, sp
-
- /*
- * Called from user mode, go somewhere else.
- */
- mfc0 k0, CP0_CAUSE
- andi k0, k0, 0x7c
-#ifdef CONFIG_64BIT
- dsll k0, k0, 1
-#endif
- PTR_L k1, saved_vectors(k0)
- jr k1
- nop
-1:
- move k0, sp
- PTR_SUBU sp, k1, GDB_FR_SIZE*2 # see comment above
- LONG_S k0, GDB_FR_REG29(sp)
- LONG_S $2, GDB_FR_REG2(sp)
-
-/*
- * First save the CP0 and special registers
- */
-
- mfc0 v0, CP0_STATUS
- LONG_S v0, GDB_FR_STATUS(sp)
- mfc0 v0, CP0_CAUSE
- LONG_S v0, GDB_FR_CAUSE(sp)
- DMFC0 v0, CP0_EPC
- LONG_S v0, GDB_FR_EPC(sp)
- DMFC0 v0, CP0_BADVADDR
- LONG_S v0, GDB_FR_BADVADDR(sp)
- mfhi v0
- LONG_S v0, GDB_FR_HI(sp)
- mflo v0
- LONG_S v0, GDB_FR_LO(sp)
-
-/*
- * Now the integer registers
- */
-
- LONG_S zero, GDB_FR_REG0(sp) /* I know... */
- LONG_S $1, GDB_FR_REG1(sp)
- /* v0 already saved */
- LONG_S $3, GDB_FR_REG3(sp)
- LONG_S $4, GDB_FR_REG4(sp)
- LONG_S $5, GDB_FR_REG5(sp)
- LONG_S $6, GDB_FR_REG6(sp)
- LONG_S $7, GDB_FR_REG7(sp)
- LONG_S $8, GDB_FR_REG8(sp)
- LONG_S $9, GDB_FR_REG9(sp)
- LONG_S $10, GDB_FR_REG10(sp)
- LONG_S $11, GDB_FR_REG11(sp)
- LONG_S $12, GDB_FR_REG12(sp)
- LONG_S $13, GDB_FR_REG13(sp)
- LONG_S $14, GDB_FR_REG14(sp)
- LONG_S $15, GDB_FR_REG15(sp)
- LONG_S $16, GDB_FR_REG16(sp)
- LONG_S $17, GDB_FR_REG17(sp)
- LONG_S $18, GDB_FR_REG18(sp)
- LONG_S $19, GDB_FR_REG19(sp)
- LONG_S $20, GDB_FR_REG20(sp)
- LONG_S $21, GDB_FR_REG21(sp)
- LONG_S $22, GDB_FR_REG22(sp)
- LONG_S $23, GDB_FR_REG23(sp)
- LONG_S $24, GDB_FR_REG24(sp)
- LONG_S $25, GDB_FR_REG25(sp)
- LONG_S $26, GDB_FR_REG26(sp)
- LONG_S $27, GDB_FR_REG27(sp)
- LONG_S $28, GDB_FR_REG28(sp)
- /* sp already saved */
- LONG_S $30, GDB_FR_REG30(sp)
- LONG_S $31, GDB_FR_REG31(sp)
-
- CLI /* disable interrupts */
- TRACE_IRQS_OFF
-
-/*
- * Followed by the floating point registers
- */
- mfc0 v0, CP0_STATUS /* FPU enabled? */
- srl v0, v0, 16
- andi v0, v0, (ST0_CU1 >> 16)
-
- beqz v0,2f /* disabled, skip */
- nop
-
- SDC1 $0, GDB_FR_FPR0(sp)
- SDC1 $1, GDB_FR_FPR1(sp)
- SDC1 $2, GDB_FR_FPR2(sp)
- SDC1 $3, GDB_FR_FPR3(sp)
- SDC1 $4, GDB_FR_FPR4(sp)
- SDC1 $5, GDB_FR_FPR5(sp)
- SDC1 $6, GDB_FR_FPR6(sp)
- SDC1 $7, GDB_FR_FPR7(sp)
- SDC1 $8, GDB_FR_FPR8(sp)
- SDC1 $9, GDB_FR_FPR9(sp)
- SDC1 $10, GDB_FR_FPR10(sp)
- SDC1 $11, GDB_FR_FPR11(sp)
- SDC1 $12, GDB_FR_FPR12(sp)
- SDC1 $13, GDB_FR_FPR13(sp)
- SDC1 $14, GDB_FR_FPR14(sp)
- SDC1 $15, GDB_FR_FPR15(sp)
- SDC1 $16, GDB_FR_FPR16(sp)
- SDC1 $17, GDB_FR_FPR17(sp)
- SDC1 $18, GDB_FR_FPR18(sp)
- SDC1 $19, GDB_FR_FPR19(sp)
- SDC1 $20, GDB_FR_FPR20(sp)
- SDC1 $21, GDB_FR_FPR21(sp)
- SDC1 $22, GDB_FR_FPR22(sp)
- SDC1 $23, GDB_FR_FPR23(sp)
- SDC1 $24, GDB_FR_FPR24(sp)
- SDC1 $25, GDB_FR_FPR25(sp)
- SDC1 $26, GDB_FR_FPR26(sp)
- SDC1 $27, GDB_FR_FPR27(sp)
- SDC1 $28, GDB_FR_FPR28(sp)
- SDC1 $29, GDB_FR_FPR29(sp)
- SDC1 $30, GDB_FR_FPR30(sp)
- SDC1 $31, GDB_FR_FPR31(sp)
-
-/*
- * FPU control registers
- */
-
- cfc1 v0, CP1_STATUS
- LONG_S v0, GDB_FR_FSR(sp)
- cfc1 v0, CP1_REVISION
- LONG_S v0, GDB_FR_FIR(sp)
-
-/*
- * Current stack frame ptr
- */
-
-2:
- LONG_S sp, GDB_FR_FRP(sp)
-
-/*
- * CP0 registers (R4000/R4400 unused registers skipped)
- */
-
- mfc0 v0, CP0_INDEX
- LONG_S v0, GDB_FR_CP0_INDEX(sp)
- mfc0 v0, CP0_RANDOM
- LONG_S v0, GDB_FR_CP0_RANDOM(sp)
- DMFC0 v0, CP0_ENTRYLO0
- LONG_S v0, GDB_FR_CP0_ENTRYLO0(sp)
- DMFC0 v0, CP0_ENTRYLO1
- LONG_S v0, GDB_FR_CP0_ENTRYLO1(sp)
- DMFC0 v0, CP0_CONTEXT
- LONG_S v0, GDB_FR_CP0_CONTEXT(sp)
- mfc0 v0, CP0_PAGEMASK
- LONG_S v0, GDB_FR_CP0_PAGEMASK(sp)
- mfc0 v0, CP0_WIRED
- LONG_S v0, GDB_FR_CP0_WIRED(sp)
- DMFC0 v0, CP0_ENTRYHI
- LONG_S v0, GDB_FR_CP0_ENTRYHI(sp)
- mfc0 v0, CP0_PRID
- LONG_S v0, GDB_FR_CP0_PRID(sp)
-
- .set at
-
-/*
- * Continue with the higher level handler
- */
-
- move a0,sp
-
- jal handle_exception
- nop
-
-/*
- * Restore all writable registers, in reverse order
- */
-
- .set noat
-
- LONG_L v0, GDB_FR_CP0_ENTRYHI(sp)
- LONG_L v1, GDB_FR_CP0_WIRED(sp)
- DMTC0 v0, CP0_ENTRYHI
- mtc0 v1, CP0_WIRED
- LONG_L v0, GDB_FR_CP0_PAGEMASK(sp)
- LONG_L v1, GDB_FR_CP0_ENTRYLO1(sp)
- mtc0 v0, CP0_PAGEMASK
- DMTC0 v1, CP0_ENTRYLO1
- LONG_L v0, GDB_FR_CP0_ENTRYLO0(sp)
- LONG_L v1, GDB_FR_CP0_INDEX(sp)
- DMTC0 v0, CP0_ENTRYLO0
- LONG_L v0, GDB_FR_CP0_CONTEXT(sp)
- mtc0 v1, CP0_INDEX
- DMTC0 v0, CP0_CONTEXT
-
-
-/*
- * Next, the floating point registers
- */
- mfc0 v0, CP0_STATUS /* check if the FPU is enabled */
- srl v0, v0, 16
- andi v0, v0, (ST0_CU1 >> 16)
-
- beqz v0, 3f /* disabled, skip */
- nop
-
- LDC1 $31, GDB_FR_FPR31(sp)
- LDC1 $30, GDB_FR_FPR30(sp)
- LDC1 $29, GDB_FR_FPR29(sp)
- LDC1 $28, GDB_FR_FPR28(sp)
- LDC1 $27, GDB_FR_FPR27(sp)
- LDC1 $26, GDB_FR_FPR26(sp)
- LDC1 $25, GDB_FR_FPR25(sp)
- LDC1 $24, GDB_FR_FPR24(sp)
- LDC1 $23, GDB_FR_FPR23(sp)
- LDC1 $22, GDB_FR_FPR22(sp)
- LDC1 $21, GDB_FR_FPR21(sp)
- LDC1 $20, GDB_FR_FPR20(sp)
- LDC1 $19, GDB_FR_FPR19(sp)
- LDC1 $18, GDB_FR_FPR18(sp)
- LDC1 $17, GDB_FR_FPR17(sp)
- LDC1 $16, GDB_FR_FPR16(sp)
- LDC1 $15, GDB_FR_FPR15(sp)
- LDC1 $14, GDB_FR_FPR14(sp)
- LDC1 $13, GDB_FR_FPR13(sp)
- LDC1 $12, GDB_FR_FPR12(sp)
- LDC1 $11, GDB_FR_FPR11(sp)
- LDC1 $10, GDB_FR_FPR10(sp)
- LDC1 $9, GDB_FR_FPR9(sp)
- LDC1 $8, GDB_FR_FPR8(sp)
- LDC1 $7, GDB_FR_FPR7(sp)
- LDC1 $6, GDB_FR_FPR6(sp)
- LDC1 $5, GDB_FR_FPR5(sp)
- LDC1 $4, GDB_FR_FPR4(sp)
- LDC1 $3, GDB_FR_FPR3(sp)
- LDC1 $2, GDB_FR_FPR2(sp)
- LDC1 $1, GDB_FR_FPR1(sp)
- LDC1 $0, GDB_FR_FPR0(sp)
-
-/*
- * Now the CP0 and integer registers
- */
-
-3:
-#ifdef CONFIG_MIPS_MT_SMTC
- /* Read-modify write of Status must be atomic */
- mfc0 t2, CP0_TCSTATUS
- ori t1, t2, TCSTATUS_IXMT
- mtc0 t1, CP0_TCSTATUS
- andi t2, t2, TCSTATUS_IXMT
- _ehb
- DMT 9 # dmt t1
- jal mips_ihb
- nop
-#endif /* CONFIG_MIPS_MT_SMTC */
- mfc0 t0, CP0_STATUS
- ori t0, 0x1f
- xori t0, 0x1f
- mtc0 t0, CP0_STATUS
-#ifdef CONFIG_MIPS_MT_SMTC
- andi t1, t1, VPECONTROL_TE
- beqz t1, 9f
- nop
- EMT # emt
-9:
- mfc0 t1, CP0_TCSTATUS
- xori t1, t1, TCSTATUS_IXMT
- or t1, t1, t2
- mtc0 t1, CP0_TCSTATUS
- _ehb
-#endif /* CONFIG_MIPS_MT_SMTC */
- LONG_L v0, GDB_FR_STATUS(sp)
- LONG_L v1, GDB_FR_EPC(sp)
- mtc0 v0, CP0_STATUS
- DMTC0 v1, CP0_EPC
- LONG_L v0, GDB_FR_HI(sp)
- LONG_L v1, GDB_FR_LO(sp)
- mthi v0
- mtlo v1
- LONG_L $31, GDB_FR_REG31(sp)
- LONG_L $30, GDB_FR_REG30(sp)
- LONG_L $28, GDB_FR_REG28(sp)
- LONG_L $27, GDB_FR_REG27(sp)
- LONG_L $26, GDB_FR_REG26(sp)
- LONG_L $25, GDB_FR_REG25(sp)
- LONG_L $24, GDB_FR_REG24(sp)
- LONG_L $23, GDB_FR_REG23(sp)
- LONG_L $22, GDB_FR_REG22(sp)
- LONG_L $21, GDB_FR_REG21(sp)
- LONG_L $20, GDB_FR_REG20(sp)
- LONG_L $19, GDB_FR_REG19(sp)
- LONG_L $18, GDB_FR_REG18(sp)
- LONG_L $17, GDB_FR_REG17(sp)
- LONG_L $16, GDB_FR_REG16(sp)
- LONG_L $15, GDB_FR_REG15(sp)
- LONG_L $14, GDB_FR_REG14(sp)
- LONG_L $13, GDB_FR_REG13(sp)
- LONG_L $12, GDB_FR_REG12(sp)
- LONG_L $11, GDB_FR_REG11(sp)
- LONG_L $10, GDB_FR_REG10(sp)
- LONG_L $9, GDB_FR_REG9(sp)
- LONG_L $8, GDB_FR_REG8(sp)
- LONG_L $7, GDB_FR_REG7(sp)
- LONG_L $6, GDB_FR_REG6(sp)
- LONG_L $5, GDB_FR_REG5(sp)
- LONG_L $4, GDB_FR_REG4(sp)
- LONG_L $3, GDB_FR_REG3(sp)
- LONG_L $2, GDB_FR_REG2(sp)
- LONG_L $1, GDB_FR_REG1(sp)
-#if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
- LONG_L k0, GDB_FR_EPC(sp)
- LONG_L $29, GDB_FR_REG29(sp) /* Deallocate stack */
- jr k0
- rfe
-#else
- LONG_L sp, GDB_FR_REG29(sp) /* Deallocate stack */
-
- .set mips3
- eret
- .set mips0
-#endif
- .set at
- .set reorder
- END(trap_low)
-
-LEAF(kgdb_read_byte)
-4: lb t0, (a0)
- sb t0, (a1)
- li v0, 0
- jr ra
- .section __ex_table,"a"
- PTR 4b, kgdbfault
- .previous
- END(kgdb_read_byte)
-
-LEAF(kgdb_write_byte)
-5: sb a0, (a1)
- li v0, 0
- jr ra
- .section __ex_table,"a"
- PTR 5b, kgdbfault
- .previous
- END(kgdb_write_byte)
-
- .type kgdbfault@function
- .ent kgdbfault
-
-kgdbfault: li v0, -EFAULT
- jr ra
- .end kgdbfault
diff --git a/arch/mips/kernel/gdb-stub.c b/arch/mips/kernel/gdb-stub.c
deleted file mode 100644
index 25f4eab..0000000
--- a/arch/mips/kernel/gdb-stub.c
+++ /dev/null
@@ -1,1155 +0,0 @@
-/*
- * arch/mips/kernel/gdb-stub.c
- *
- * Originally written by Glenn Engel, Lake Stevens Instrument Division
- *
- * Contributed by HP Systems
- *
- * Modified for SPARC by Stu Grossman, Cygnus Support.
- *
- * Modified for Linux/MIPS (and MIPS in general) by Andreas Busse
- * Send complaints, suggestions etc. to <andy@waldorf-gmbh.de>
- *
- * Copyright (C) 1995 Andreas Busse
- *
- * Copyright (C) 2003 MontaVista Software Inc.
- * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
- */
-
-/*
- * To enable debugger support, two things need to happen. One, a
- * call to set_debug_traps() is necessary in order to allow any breakpoints
- * or error conditions to be properly intercepted and reported to gdb.
- * Two, a breakpoint needs to be generated to begin communication. This
- * is most easily accomplished by a call to breakpoint(). Breakpoint()
- * simulates a breakpoint by executing a BREAK instruction.
- *
- *
- * The following gdb commands are supported:
- *
- * command function Return value
- *
- * g return the value of the CPU registers hex data or ENN
- * G set the value of the CPU registers OK or ENN
- *
- * mAA..AA,LLLL Read LLLL bytes at address AA..AA hex data or ENN
- * MAA..AA,LLLL: Write LLLL bytes at address AA.AA OK or ENN
- *
- * c Resume at current address SNN ( signal NN)
- * cAA..AA Continue at address AA..AA SNN
- *
- * s Step one instruction SNN
- * sAA..AA Step one instruction from AA..AA SNN
- *
- * k kill
- *
- * ? What was the last sigval ? SNN (signal NN)
- *
- * bBB..BB Set baud rate to BB..BB OK or BNN, then sets
- * baud rate
- *
- * All commands and responses are sent with a packet which includes a
- * checksum. A packet consists of
- *
- * $<packet info>#<checksum>.
- *
- * where
- * <packet info> :: <characters representing the command or response>
- * <checksum> :: < two hex digits computed as modulo 256 sum of <packetinfo>>
- *
- * When a packet is received, it is first acknowledged with either '+' or '-'.
- * '+' indicates a successful transfer. '-' indicates a failed transfer.
- *
- * Example:
- *
- * Host: Reply:
- * $m0,10#2a +$00010203040506070809101112131415#42
- *
- *
- * ==============
- * MORE EXAMPLES:
- * ==============
- *
- * For reference -- the following are the steps that one
- * company took (RidgeRun Inc) to get remote gdb debugging
- * going. In this scenario the host machine was a PC and the
- * target platform was a Galileo EVB64120A MIPS evaluation
- * board.
- *
- * Step 1:
- * First download gdb-5.0.tar.gz from the internet.
- * and then build/install the package.
- *
- * Example:
- * $ tar zxf gdb-5.0.tar.gz
- * $ cd gdb-5.0
- * $ ./configure --target=mips-linux-elf
- * $ make
- * $ install
- * $ which mips-linux-elf-gdb
- * /usr/local/bin/mips-linux-elf-gdb
- *
- * Step 2:
- * Configure linux for remote debugging and build it.
- *
- * Example:
- * $ cd ~/linux
- * $ make menuconfig <go to "Kernel Hacking" and turn on remote debugging>
- * $ make
- *
- * Step 3:
- * Download the kernel to the remote target and start
- * the kernel running. It will promptly halt and wait
- * for the host gdb session to connect. It does this
- * since the "Kernel Hacking" option has defined
- * CONFIG_KGDB which in turn enables your calls
- * to:
- * set_debug_traps();
- * breakpoint();
- *
- * Step 4:
- * Start the gdb session on the host.
- *
- * Example:
- * $ mips-linux-elf-gdb vmlinux
- * (gdb) set remotebaud 115200
- * (gdb) target remote /dev/ttyS1
- * ...at this point you are connected to
- * the remote target and can use gdb
- * in the normal fasion. Setting
- * breakpoints, single stepping,
- * printing variables, etc.
- */
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/console.h>
-#include <linux/init.h>
-#include <linux/smp.h>
-#include <linux/spinlock.h>
-#include <linux/slab.h>
-#include <linux/reboot.h>
-
-#include <asm/asm.h>
-#include <asm/cacheflush.h>
-#include <asm/mipsregs.h>
-#include <asm/pgtable.h>
-#include <asm/system.h>
-#include <asm/gdb-stub.h>
-#include <asm/inst.h>
-
-/*
- * external low-level support routines
- */
-
-extern int putDebugChar(char c); /* write a single character */
-extern char getDebugChar(void); /* read and return a single char */
-extern void trap_low(void);
-
-/*
- * breakpoint and test functions
- */
-extern void breakpoint(void);
-extern void breakinst(void);
-extern void async_breakpoint(void);
-extern void async_breakinst(void);
-extern void adel(void);
-
-/*
- * local prototypes
- */
-
-static void getpacket(char *buffer);
-static void putpacket(char *buffer);
-static int computeSignal(int tt);
-static int hex(unsigned char ch);
-static int hexToInt(char **ptr, int *intValue);
-static int hexToLong(char **ptr, long *longValue);
-static unsigned char *mem2hex(char *mem, char *buf, int count, int may_fault);
-void handle_exception(struct gdb_regs *regs);
-
-int kgdb_enabled;
-
-/*
- * spin locks for smp case
- */
-static DEFINE_SPINLOCK(kgdb_lock);
-static raw_spinlock_t kgdb_cpulock[NR_CPUS] = {
- [0 ... NR_CPUS-1] = __RAW_SPIN_LOCK_UNLOCKED,
-};
-
-/*
- * BUFMAX defines the maximum number of characters in inbound/outbound buffers
- * at least NUMREGBYTES*2 are needed for register packets
- */
-#define BUFMAX 2048
-
-static char input_buffer[BUFMAX];
-static char output_buffer[BUFMAX];
-static int initialized; /* !0 means we've been initialized */
-static int kgdb_started;
-static const char hexchars[]="0123456789abcdef";
-
-/* Used to prevent crashes in memory access. Note that they'll crash anyway if
- we haven't set up fault handlers yet... */
-int kgdb_read_byte(unsigned char *address, unsigned char *dest);
-int kgdb_write_byte(unsigned char val, unsigned char *dest);
-
-/*
- * Convert ch from a hex digit to an int
- */
-static int hex(unsigned char ch)
-{
- if (ch >= 'a' && ch <= 'f')
- return ch-'a'+10;
- if (ch >= '0' && ch <= '9')
- return ch-'0';
- if (ch >= 'A' && ch <= 'F')
- return ch-'A'+10;
- return -1;
-}
-
-/*
- * scan for the sequence $<data>#<checksum>
- */
-static void getpacket(char *buffer)
-{
- unsigned char checksum;
- unsigned char xmitcsum;
- int i;
- int count;
- unsigned char ch;
-
- do {
- /*
- * wait around for the start character,
- * ignore all other characters
- */
- while ((ch = (getDebugChar() & 0x7f)) != '$') ;
-
- checksum = 0;
- xmitcsum = -1;
- count = 0;
-
- /*
- * now, read until a # or end of buffer is found
- */
- while (count < BUFMAX) {
- ch = getDebugChar();
- if (ch == '#')
- break;
- checksum = checksum + ch;
- buffer[count] = ch;
- count = count + 1;
- }
-
- if (count >= BUFMAX)
- continue;
-
- buffer[count] = 0;
-
- if (ch == '#') {
- xmitcsum = hex(getDebugChar() & 0x7f) << 4;
- xmitcsum |= hex(getDebugChar() & 0x7f);
-
- if (checksum != xmitcsum)
- putDebugChar('-'); /* failed checksum */
- else {
- putDebugChar('+'); /* successful transfer */
-
- /*
- * if a sequence char is present,
- * reply the sequence ID
- */
- if (buffer[2] == ':') {
- putDebugChar(buffer[0]);
- putDebugChar(buffer[1]);
-
- /*
- * remove sequence chars from buffer
- */
- count = strlen(buffer);
- for (i=3; i <= count; i++)
- buffer[i-3] = buffer[i];
- }
- }
- }
- }
- while (checksum != xmitcsum);
-}
-
-/*
- * send the packet in buffer.
- */
-static void putpacket(char *buffer)
-{
- unsigned char checksum;
- int count;
- unsigned char ch;
-
- /*
- * $<packet info>#<checksum>.
- */
-
- do {
- putDebugChar('$');
- checksum = 0;
- count = 0;
-
- while ((ch = buffer[count]) != 0) {
- if (!(putDebugChar(ch)))
- return;
- checksum += ch;
- count += 1;
- }
-
- putDebugChar('#');
- putDebugChar(hexchars[checksum >> 4]);
- putDebugChar(hexchars[checksum & 0xf]);
-
- }
- while ((getDebugChar() & 0x7f) != '+');
-}
-
-
-/*
- * Convert the memory pointed to by mem into hex, placing result in buf.
- * Return a pointer to the last char put in buf (null), in case of mem fault,
- * return 0.
- * may_fault is non-zero if we are reading from arbitrary memory, but is currently
- * not used.
- */
-static unsigned char *mem2hex(char *mem, char *buf, int count, int may_fault)
-{
- unsigned char ch;
-
- while (count-- > 0) {
- if (kgdb_read_byte(mem++, &ch) != 0)
- return 0;
- *buf++ = hexchars[ch >> 4];
- *buf++ = hexchars[ch & 0xf];
- }
-
- *buf = 0;
-
- return buf;
-}
-
-/*
- * convert the hex array pointed to by buf into binary to be placed in mem
- * return a pointer to the character AFTER the last byte written
- * may_fault is non-zero if we are reading from arbitrary memory, but is currently
- * not used.
- */
-static char *hex2mem(char *buf, char *mem, int count, int binary, int may_fault)
-{
- int i;
- unsigned char ch;
-
- for (i=0; i<count; i++)
- {
- if (binary) {
- ch = *buf++;
- if (ch == 0x7d)
- ch = 0x20 ^ *buf++;
- }
- else {
- ch = hex(*buf++) << 4;
- ch |= hex(*buf++);
- }
- if (kgdb_write_byte(ch, mem++) != 0)
- return 0;
- }
-
- return mem;
-}
-
-/*
- * This table contains the mapping between SPARC hardware trap types, and
- * signals, which are primarily what GDB understands. It also indicates
- * which hardware traps we need to commandeer when initializing the stub.
- */
-static struct hard_trap_info {
- unsigned char tt; /* Trap type code for MIPS R3xxx and R4xxx */
- unsigned char signo; /* Signal that we map this trap into */
-} hard_trap_info[] = {
- { 6, SIGBUS }, /* instruction bus error */
- { 7, SIGBUS }, /* data bus error */
- { 9, SIGTRAP }, /* break */
- { 10, SIGILL }, /* reserved instruction */
-/* { 11, SIGILL }, */ /* CPU unusable */
- { 12, SIGFPE }, /* overflow */
- { 13, SIGTRAP }, /* trap */
- { 14, SIGSEGV }, /* virtual instruction cache coherency */
- { 15, SIGFPE }, /* floating point exception */
- { 23, SIGSEGV }, /* watch */
- { 31, SIGSEGV }, /* virtual data cache coherency */
- { 0, 0} /* Must be last */
-};
-
-/* Save the normal trap handlers for user-mode traps. */
-void *saved_vectors[32];
-
-/*
- * Set up exception handlers for tracing and breakpoints
- */
-void set_debug_traps(void)
-{
- struct hard_trap_info *ht;
- unsigned long flags;
- unsigned char c;
-
- local_irq_save(flags);
- for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
- saved_vectors[ht->tt] = set_except_vector(ht->tt, trap_low);
-
- putDebugChar('+'); /* 'hello world' */
- /*
- * In case GDB is started before us, ack any packets
- * (presumably "$?#xx") sitting there.
- */
- while((c = getDebugChar()) != '$');
- while((c = getDebugChar()) != '#');
- c = getDebugChar(); /* eat first csum byte */
- c = getDebugChar(); /* eat second csum byte */
- putDebugChar('+'); /* ack it */
-
- initialized = 1;
- local_irq_restore(flags);
-}
-
-void restore_debug_traps(void)
-{
- struct hard_trap_info *ht;
- unsigned long flags;
-
- local_irq_save(flags);
- for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
- set_except_vector(ht->tt, saved_vectors[ht->tt]);
- local_irq_restore(flags);
-}
-
-/*
- * Convert the MIPS hardware trap type code to a Unix signal number.
- */
-static int computeSignal(int tt)
-{
- struct hard_trap_info *ht;
-
- for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
- if (ht->tt == tt)
- return ht->signo;
-
- return SIGHUP; /* default for things we don't know about */
-}
-
-/*
- * While we find nice hex chars, build an int.
- * Return number of chars processed.
- */
-static int hexToInt(char **ptr, int *intValue)
-{
- int numChars = 0;
- int hexValue;
-
- *intValue = 0;
-
- while (**ptr) {
- hexValue = hex(**ptr);
- if (hexValue < 0)
- break;
-
- *intValue = (*intValue << 4) | hexValue;
- numChars ++;
-
- (*ptr)++;
- }
-
- return (numChars);
-}
-
-static int hexToLong(char **ptr, long *longValue)
-{
- int numChars = 0;
- int hexValue;
-
- *longValue = 0;
-
- while (**ptr) {
- hexValue = hex(**ptr);
- if (hexValue < 0)
- break;
-
- *longValue = (*longValue << 4) | hexValue;
- numChars ++;
-
- (*ptr)++;
- }
-
- return numChars;
-}
-
-
-#if 0
-/*
- * Print registers (on target console)
- * Used only to debug the stub...
- */
-void show_gdbregs(struct gdb_regs * regs)
-{
- /*
- * Saved main processor registers
- */
- printk("$0 : %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
- regs->reg0, regs->reg1, regs->reg2, regs->reg3,
- regs->reg4, regs->reg5, regs->reg6, regs->reg7);
- printk("$8 : %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
- regs->reg8, regs->reg9, regs->reg10, regs->reg11,
- regs->reg12, regs->reg13, regs->reg14, regs->reg15);
- printk("$16: %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
- regs->reg16, regs->reg17, regs->reg18, regs->reg19,
- regs->reg20, regs->reg21, regs->reg22, regs->reg23);
- printk("$24: %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
- regs->reg24, regs->reg25, regs->reg26, regs->reg27,
- regs->reg28, regs->reg29, regs->reg30, regs->reg31);
-
- /*
- * Saved cp0 registers
- */
- printk("epc : %08lx\nStatus: %08lx\nCause : %08lx\n",
- regs->cp0_epc, regs->cp0_status, regs->cp0_cause);
-}
-#endif /* dead code */
-
-/*
- * We single-step by setting breakpoints. When an exception
- * is handled, we need to restore the instructions hoisted
- * when the breakpoints were set.
- *
- * This is where we save the original instructions.
- */
-static struct gdb_bp_save {
- unsigned long addr;
- unsigned int val;
-} step_bp[2];
-
-#define BP 0x0000000d /* break opcode */
-
-/*
- * Set breakpoint instructions for single stepping.
- */
-static void single_step(struct gdb_regs *regs)
-{
- union mips_instruction insn;
- unsigned long targ;
- int is_branch, is_cond, i;
-
- targ = regs->cp0_epc;
- insn.word = *(unsigned int *)targ;
- is_branch = is_cond = 0;
-
- switch (insn.i_format.opcode) {
- /*
- * jr and jalr are in r_format format.
- */
- case spec_op:
- switch (insn.r_format.func) {
- case jalr_op:
- case jr_op:
- targ = *(®s->reg0 + insn.r_format.rs);
- is_branch = 1;
- break;
- }
- break;
-
- /*
- * This group contains:
- * bltz_op, bgez_op, bltzl_op, bgezl_op,
- * bltzal_op, bgezal_op, bltzall_op, bgezall_op.
- */
- case bcond_op:
- is_branch = is_cond = 1;
- targ += 4 + (insn.i_format.simmediate << 2);
- break;
-
- /*
- * These are unconditional and in j_format.
- */
- case jal_op:
- case j_op:
- is_branch = 1;
- targ += 4;
- targ >>= 28;
- targ <<= 28;
- targ |= (insn.j_format.target << 2);
- break;
-
- /*
- * These are conditional.
- */
- case beq_op:
- case beql_op:
- case bne_op:
- case bnel_op:
- case blez_op:
- case blezl_op:
- case bgtz_op:
- case bgtzl_op:
- case cop0_op:
- case cop1_op:
- case cop2_op:
- case cop1x_op:
- is_branch = is_cond = 1;
- targ += 4 + (insn.i_format.simmediate << 2);
- break;
- }
-
- if (is_branch) {
- i = 0;
- if (is_cond && targ != (regs->cp0_epc + 8)) {
- step_bp[i].addr = regs->cp0_epc + 8;
- step_bp[i++].val = *(unsigned *)(regs->cp0_epc + 8);
- *(unsigned *)(regs->cp0_epc + 8) = BP;
- }
- step_bp[i].addr = targ;
- step_bp[i].val = *(unsigned *)targ;
- *(unsigned *)targ = BP;
- } else {
- step_bp[0].addr = regs->cp0_epc + 4;
- step_bp[0].val = *(unsigned *)(regs->cp0_epc + 4);
- *(unsigned *)(regs->cp0_epc + 4) = BP;
- }
-}
-
-/*
- * If asynchronously interrupted by gdb, then we need to set a breakpoint
- * at the interrupted instruction so that we wind up stopped with a
- * reasonable stack frame.
- */
-static struct gdb_bp_save async_bp;
-
-/*
- * Swap the interrupted EPC with our asynchronous breakpoint routine.
- * This is safer than stuffing the breakpoint in-place, since no cache
- * flushes (or resulting smp_call_functions) are required. The
- * assumption is that only one CPU will be handling asynchronous bp's,
- * and only one can be active at a time.
- */
-extern spinlock_t smp_call_lock;
-
-void set_async_breakpoint(unsigned long *epc)
-{
- /* skip breaking into userland */
- if ((*epc & 0x80000000) == 0)
- return;
-
-#ifdef CONFIG_SMP
- /* avoid deadlock if someone is make IPC */
- if (spin_is_locked(&smp_call_lock))
- return;
-#endif
-
- async_bp.addr = *epc;
- *epc = (unsigned long)async_breakpoint;
-}
-
-#ifdef CONFIG_SMP
-static void kgdb_wait(void *arg)
-{
- unsigned flags;
- int cpu = smp_processor_id();
-
- local_irq_save(flags);
-
- __raw_spin_lock(&kgdb_cpulock[cpu]);
- __raw_spin_unlock(&kgdb_cpulock[cpu]);
-
- local_irq_restore(flags);
-}
-#endif
-
-/*
- * GDB stub needs to call kgdb_wait on all processor with interrupts
- * disabled, so it uses it's own special variant.
- */
-static int kgdb_smp_call_kgdb_wait(void)
-{
-#ifdef CONFIG_SMP
- cpumask_t mask = cpu_online_map;
- struct call_data_struct data;
- int cpu = smp_processor_id();
- int cpus;
-
- /*
- * Can die spectacularly if this CPU isn't yet marked online
- */
- BUG_ON(!cpu_online(cpu));
-
- cpu_clear(cpu, mask);
- cpus = cpus_weight(mask);
- if (!cpus)
- return 0;
-
- if (spin_is_locked(&smp_call_lock)) {
- /*
- * Some other processor is trying to make us do something
- * but we're not going to respond... give up
- */
- return -1;
- }
-
- /*
- * We will continue here, accepting the fact that
- * the kernel may deadlock if another CPU attempts
- * to call smp_call_function now...
- */
-
- data.func = kgdb_wait;
- data.info = NULL;
- atomic_set(&data.started, 0);
- data.wait = 0;
-
- spin_lock(&smp_call_lock);
- call_data = &data;
- mb();
-
- core_send_ipi_mask(mask, SMP_CALL_FUNCTION);
-
- /* Wait for response */
- /* FIXME: lock-up detection, backtrace on lock-up */
- while (atomic_read(&data.started) != cpus)
- barrier();
-
- call_data = NULL;
- spin_unlock(&smp_call_lock);
-#endif
-
- return 0;
-}
-
-/*
- * This function does all command processing for interfacing to gdb. It
- * returns 1 if you should skip the instruction at the trap address, 0
- * otherwise.
- */
-void handle_exception(struct gdb_regs *regs)
-{
- int trap; /* Trap type */
- int sigval;
- long addr;
- int length;
- char *ptr;
- unsigned long *stack;
- int i;
- int bflag = 0;
-
- kgdb_started = 1;
-
- /*
- * acquire the big kgdb spinlock
- */
- if (!spin_trylock(&kgdb_lock)) {
- /*
- * some other CPU has the lock, we should go back to
- * receive the gdb_wait IPC
- */
- return;
- }
-
- /*
- * If we're in async_breakpoint(), restore the real EPC from
- * the breakpoint.
- */
- if (regs->cp0_epc == (unsigned long)async_breakinst) {
- regs->cp0_epc = async_bp.addr;
- async_bp.addr = 0;
- }
-
- /*
- * acquire the CPU spinlocks
- */
- for_each_online_cpu(i)
- if (__raw_spin_trylock(&kgdb_cpulock[i]) == 0)
- panic("kgdb: couldn't get cpulock %d\n", i);
-
- /*
- * force other cpus to enter kgdb
- */
- kgdb_smp_call_kgdb_wait();
-
- /*
- * If we're in breakpoint() increment the PC
- */
- trap = (regs->cp0_cause & 0x7c) >> 2;
- if (trap == 9 && regs->cp0_epc == (unsigned long)breakinst)
- regs->cp0_epc += 4;
-
- /*
- * If we were single_stepping, restore the opcodes hoisted
- * for the breakpoint[s].
- */
- if (step_bp[0].addr) {
- *(unsigned *)step_bp[0].addr = step_bp[0].val;
- step_bp[0].addr = 0;
-
- if (step_bp[1].addr) {
- *(unsigned *)step_bp[1].addr = step_bp[1].val;
- step_bp[1].addr = 0;
- }
- }
-
- stack = (long *)regs->reg29; /* stack ptr */
- sigval = computeSignal(trap);
-
- /*
- * reply to host that an exception has occurred
- */
- ptr = output_buffer;
-
- /*
- * Send trap type (converted to signal)
- */
- *ptr++ = 'T';
- *ptr++ = hexchars[sigval >> 4];
- *ptr++ = hexchars[sigval & 0xf];
-
- /*
- * Send Error PC
- */
- *ptr++ = hexchars[REG_EPC >> 4];
- *ptr++ = hexchars[REG_EPC & 0xf];
- *ptr++ = ':';
- ptr = mem2hex((char *)®s->cp0_epc, ptr, sizeof(long), 0);
- *ptr++ = ';';
-
- /*
- * Send frame pointer
- */
- *ptr++ = hexchars[REG_FP >> 4];
- *ptr++ = hexchars[REG_FP & 0xf];
- *ptr++ = ':';
- ptr = mem2hex((char *)®s->reg30, ptr, sizeof(long), 0);
- *ptr++ = ';';
-
- /*
- * Send stack pointer
- */
- *ptr++ = hexchars[REG_SP >> 4];
- *ptr++ = hexchars[REG_SP & 0xf];
- *ptr++ = ':';
- ptr = mem2hex((char *)®s->reg29, ptr, sizeof(long), 0);
- *ptr++ = ';';
-
- *ptr++ = 0;
- putpacket(output_buffer); /* send it off... */
-
- /*
- * Wait for input from remote GDB
- */
- while (1) {
- output_buffer[0] = 0;
- getpacket(input_buffer);
-
- switch (input_buffer[0])
- {
- case '?':
- output_buffer[0] = 'S';
- output_buffer[1] = hexchars[sigval >> 4];
- output_buffer[2] = hexchars[sigval & 0xf];
- output_buffer[3] = 0;
- break;
-
- /*
- * Detach debugger; let CPU run
- */
- case 'D':
- putpacket(output_buffer);
- goto finish_kgdb;
- break;
-
- case 'd':
- /* toggle debug flag */
- break;
-
- /*
- * Return the value of the CPU registers
- */
- case 'g':
- ptr = output_buffer;
- ptr = mem2hex((char *)®s->reg0, ptr, 32*sizeof(long), 0); /* r0...r31 */
- ptr = mem2hex((char *)®s->cp0_status, ptr, 6*sizeof(long), 0); /* cp0 */
- ptr = mem2hex((char *)®s->fpr0, ptr, 32*sizeof(long), 0); /* f0...31 */
- ptr = mem2hex((char *)®s->cp1_fsr, ptr, 2*sizeof(long), 0); /* cp1 */
- ptr = mem2hex((char *)®s->frame_ptr, ptr, 2*sizeof(long), 0); /* frp */
- ptr = mem2hex((char *)®s->cp0_index, ptr, 16*sizeof(long), 0); /* cp0 */
- break;
-
- /*
- * set the value of the CPU registers - return OK
- */
- case 'G':
- {
- ptr = &input_buffer[1];
- hex2mem(ptr, (char *)®s->reg0, 32*sizeof(long), 0, 0);
- ptr += 32*(2*sizeof(long));
- hex2mem(ptr, (char *)®s->cp0_status, 6*sizeof(long), 0, 0);
- ptr += 6*(2*sizeof(long));
- hex2mem(ptr, (char *)®s->fpr0, 32*sizeof(long), 0, 0);
- ptr += 32*(2*sizeof(long));
- hex2mem(ptr, (char *)®s->cp1_fsr, 2*sizeof(long), 0, 0);
- ptr += 2*(2*sizeof(long));
- hex2mem(ptr, (char *)®s->frame_ptr, 2*sizeof(long), 0, 0);
- ptr += 2*(2*sizeof(long));
- hex2mem(ptr, (char *)®s->cp0_index, 16*sizeof(long), 0, 0);
- strcpy(output_buffer, "OK");
- }
- break;
-
- /*
- * mAA..AA,LLLL Read LLLL bytes at address AA..AA
- */
- case 'm':
- ptr = &input_buffer[1];
-
- if (hexToLong(&ptr, &addr)
- && *ptr++ == ','
- && hexToInt(&ptr, &length)) {
- if (mem2hex((char *)addr, output_buffer, length, 1))
- break;
- strcpy(output_buffer, "E03");
- } else
- strcpy(output_buffer, "E01");
- break;
-
- /*
- * XAA..AA,LLLL: Write LLLL escaped binary bytes at address AA.AA
- */
- case 'X':
- bflag = 1;
- /* fall through */
-
- /*
- * MAA..AA,LLLL: Write LLLL bytes at address AA.AA return OK
- */
- case 'M':
- ptr = &input_buffer[1];
-
- if (hexToLong(&ptr, &addr)
- && *ptr++ == ','
- && hexToInt(&ptr, &length)
- && *ptr++ == ':') {
- if (hex2mem(ptr, (char *)addr, length, bflag, 1))
- strcpy(output_buffer, "OK");
- else
- strcpy(output_buffer, "E03");
- }
- else
- strcpy(output_buffer, "E02");
- break;
-
- /*
- * cAA..AA Continue at address AA..AA(optional)
- */
- case 'c':
- /* try to read optional parameter, pc unchanged if no parm */
-
- ptr = &input_buffer[1];
- if (hexToLong(&ptr, &addr))
- regs->cp0_epc = addr;
-
- goto exit_kgdb_exception;
- break;
-
- /*
- * kill the program; let us try to restart the machine
- * Reset the whole machine.
- */
- case 'k':
- case 'r':
- machine_restart("kgdb restarts machine");
- break;
-
- /*
- * Step to next instruction
- */
- case 's':
- /*
- * There is no single step insn in the MIPS ISA, so we
- * use breakpoints and continue, instead.
- */
- single_step(regs);
- goto exit_kgdb_exception;
- /* NOTREACHED */
- break;
-
- /*
- * Set baud rate (bBB)
- * FIXME: Needs to be written
- */
- case 'b':
- {
-#if 0
- int baudrate;
- extern void set_timer_3();
-
- ptr = &input_buffer[1];
- if (!hexToInt(&ptr, &baudrate))
- {
- strcpy(output_buffer, "B01");
- break;
- }
-
- /* Convert baud rate to uart clock divider */
-
- switch (baudrate)
- {
- case 38400:
- baudrate = 16;
- break;
- case 19200:
- baudrate = 33;
- break;
- case 9600:
- baudrate = 65;
- break;
- default:
- baudrate = 0;
- strcpy(output_buffer, "B02");
- goto x1;
- }
-
- if (baudrate) {
- putpacket("OK"); /* Ack before changing speed */
- set_timer_3(baudrate); /* Set it */
- }
-#endif
- }
- break;
-
- } /* switch */
-
- /*
- * reply to the request
- */
-
- putpacket(output_buffer);
-
- } /* while */
-
- return;
-
-finish_kgdb:
- restore_debug_traps();
-
-exit_kgdb_exception:
- /* release locks so other CPUs can go */
- for_each_online_cpu(i)
- __raw_spin_unlock(&kgdb_cpulock[i]);
- spin_unlock(&kgdb_lock);
-
- __flush_cache_all();
- return;
-}
-
-/*
- * This function will generate a breakpoint exception. It is used at the
- * beginning of a program to sync up with a debugger and can be used
- * otherwise as a quick means to stop program execution and "break" into
- * the debugger.
- */
-void breakpoint(void)
-{
- if (!initialized)
- return;
-
- __asm__ __volatile__(
- ".globl breakinst\n\t"
- ".set\tnoreorder\n\t"
- "nop\n"
- "breakinst:\tbreak\n\t"
- "nop\n\t"
- ".set\treorder"
- );
-}
-
-/* Nothing but the break; don't pollute any registers */
-void async_breakpoint(void)
-{
- __asm__ __volatile__(
- ".globl async_breakinst\n\t"
- ".set\tnoreorder\n\t"
- "nop\n"
- "async_breakinst:\tbreak\n\t"
- "nop\n\t"
- ".set\treorder"
- );
-}
-
-void adel(void)
-{
- __asm__ __volatile__(
- ".globl\tadel\n\t"
- "lui\t$8,0x8000\n\t"
- "lw\t$9,1($8)\n\t"
- );
-}
-
-/*
- * malloc is needed by gdb client in "call func()", even a private one
- * will make gdb happy
- */
-static void __used *malloc(size_t size)
-{
- return kmalloc(size, GFP_ATOMIC);
-}
-
-static void __used free(void *where)
-{
- kfree(where);
-}
-
-#ifdef CONFIG_GDB_CONSOLE
-
-void gdb_putsn(const char *str, int l)
-{
- char outbuf[18];
-
- if (!kgdb_started)
- return;
-
- outbuf[0]='O';
-
- while(l) {
- int i = (l>8)?8:l;
- mem2hex((char *)str, &outbuf[1], i, 0);
- outbuf[(i*2)+1]=0;
- putpacket(outbuf);
- str += i;
- l -= i;
- }
-}
-
-static void gdb_console_write(struct console *con, const char *s, unsigned n)
-{
- gdb_putsn(s, n);
-}
-
-static struct console gdb_console = {
- .name = "gdb",
- .write = gdb_console_write,
- .flags = CON_PRINTBUFFER,
- .index = -1
-};
-
-static int __init register_gdb_console(void)
-{
- register_console(&gdb_console);
-
- return 0;
-}
-
-console_initcall(register_gdb_console);
-
-#endif
diff --git a/arch/mips/kernel/irq.c b/arch/mips/kernel/irq.c
index 6045b9a..8acba08 100644
--- a/arch/mips/kernel/irq.c
+++ b/arch/mips/kernel/irq.c
@@ -126,19 +126,6 @@ asmlinkage void spurious_interrupt(void)
atomic_inc(&irq_err_count);
}
-#ifdef CONFIG_KGDB
-extern void breakpoint(void);
-extern void set_debug_traps(void);
-
-static int kgdb_flag = 1;
-static int __init nokgdb(char *str)
-{
- kgdb_flag = 0;
- return 1;
-}
-__setup("nokgdb", nokgdb);
-#endif
-
void __init init_IRQ(void)
{
int i;
@@ -147,12 +134,4 @@ void __init init_IRQ(void)
set_irq_noprobe(i);
arch_init_irq();
-
-#ifdef CONFIG_KGDB
- if (kgdb_flag) {
- printk("Wait for gdb client connection ...\n");
- set_debug_traps();
- breakpoint();
- }
-#endif
}
diff --git a/arch/mips/mti-malta/Makefile b/arch/mips/mti-malta/Makefile
index f806444..3b7dd72 100644
--- a/arch/mips/mti-malta/Makefile
+++ b/arch/mips/mti-malta/Makefile
@@ -13,7 +13,6 @@ obj-y := malta-amon.o malta-cmdline.o \
obj-$(CONFIG_EARLY_PRINTK) += malta-console.o
obj-$(CONFIG_PCI) += malta-pci.o
-obj-$(CONFIG_KGDB) += malta-kgdb.o
# FIXME FIXME FIXME
obj-$(CONFIG_MIPS_MT_SMTC) += malta_smtc.o
diff --git a/arch/mips/mti-malta/malta-init.c b/arch/mips/mti-malta/malta-init.c
index c065302..4832af2 100644
--- a/arch/mips/mti-malta/malta-init.c
+++ b/arch/mips/mti-malta/malta-init.c
@@ -37,15 +37,6 @@
#include <asm/mips-boards/malta.h>
-#ifdef CONFIG_KGDB
-extern int rs_kgdb_hook(int, int);
-extern int rs_putDebugChar(char);
-extern char rs_getDebugChar(void);
-extern int saa9730_kgdb_hook(int);
-extern int saa9730_putDebugChar(char);
-extern char saa9730_getDebugChar(void);
-#endif
-
int prom_argc;
int *_prom_argv, *_prom_envp;
@@ -173,51 +164,6 @@ static void __init console_config(void)
}
#endif
-#ifdef CONFIG_KGDB
-void __init kgdb_config(void)
-{
- extern int (*generic_putDebugChar)(char);
- extern char (*generic_getDebugChar)(void);
- char *argptr;
- int line, speed;
-
- argptr = prom_getcmdline();
- if ((argptr = strstr(argptr, "kgdb=ttyS")) != NULL) {
- argptr += strlen("kgdb=ttyS");
- if (*argptr != '0' && *argptr != '1')
- printk("KGDB: Unknown serial line /dev/ttyS%c, "
- "falling back to /dev/ttyS1\n", *argptr);
- line = *argptr == '0' ? 0 : 1;
- printk("KGDB: Using serial line /dev/ttyS%d for session\n", line);
-
- speed = 0;
- if (*++argptr == ',')
- {
- int c;
- while ((c = *++argptr) && ('0' <= c && c <= '9'))
- speed = speed * 10 + c - '0';
- }
- {
- speed = rs_kgdb_hook(line, speed);
- generic_putDebugChar = rs_putDebugChar;
- generic_getDebugChar = rs_getDebugChar;
- }
-
- pr_info("KGDB: Using serial line /dev/ttyS%d at %d for "
- "session, please connect your debugger\n",
- line ? 1 : 0, speed);
-
- {
- char *s;
- for (s = "Please connect GDB to this port\r\n"; *s; )
- generic_putDebugChar(*s++);
- }
-
- /* Breakpoint is invoked after interrupts are initialised */
- }
-}
-#endif
-
static void __init mips_nmi_setup(void)
{
void *base;
diff --git a/arch/mips/mti-malta/malta-kgdb.c b/arch/mips/mti-malta/malta-kgdb.c
deleted file mode 100644
index 6a1854d..0000000
--- a/arch/mips/mti-malta/malta-kgdb.c
+++ /dev/null
@@ -1,133 +0,0 @@
-/*
- * Carsten Langgaard, carstenl@mips.com
- * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
- *
- * This program is free software; you can distribute it and/or modify it
- * under the terms of the GNU General Public License (Version 2) as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * This is the interface to the remote debugger stub.
- */
-#include <linux/types.h>
-#include <linux/serial.h>
-#include <linux/serialP.h>
-#include <linux/serial_reg.h>
-
-#include <asm/serial.h>
-#include <asm/io.h>
-
-static struct serial_state rs_table[] = {
- SERIAL_PORT_DFNS /* Defined in serial.h */
-};
-
-static struct async_struct kdb_port_info = {0};
-
-int (*generic_putDebugChar)(char);
-char (*generic_getDebugChar)(void);
-
-static __inline__ unsigned int serial_in(struct async_struct *info, int offset)
-{
- return inb(info->port + offset);
-}
-
-static __inline__ void serial_out(struct async_struct *info, int offset,
- int value)
-{
- outb(value, info->port+offset);
-}
-
-int rs_kgdb_hook(int tty_no, int speed) {
- int t;
- struct serial_state *ser = &rs_table[tty_no];
-
- kdb_port_info.state = ser;
- kdb_port_info.magic = SERIAL_MAGIC;
- kdb_port_info.port = ser->port;
- kdb_port_info.flags = ser->flags;
-
- /*
- * Clear all interrupts
- */
- serial_in(&kdb_port_info, UART_LSR);
- serial_in(&kdb_port_info, UART_RX);
- serial_in(&kdb_port_info, UART_IIR);
- serial_in(&kdb_port_info, UART_MSR);
-
- /*
- * Now, initialize the UART
- */
- serial_out(&kdb_port_info, UART_LCR, UART_LCR_WLEN8); /* reset DLAB */
- if (kdb_port_info.flags & ASYNC_FOURPORT) {
- kdb_port_info.MCR = UART_MCR_DTR | UART_MCR_RTS;
- t = UART_MCR_DTR | UART_MCR_OUT1;
- } else {
- kdb_port_info.MCR
- = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
- t = UART_MCR_DTR | UART_MCR_RTS;
- }
-
- kdb_port_info.MCR = t; /* no interrupts, please */
- serial_out(&kdb_port_info, UART_MCR, kdb_port_info.MCR);
-
- /*
- * and set the speed of the serial port
- */
- if (speed == 0)
- speed = 9600;
-
- t = kdb_port_info.state->baud_base / speed;
- /* set DLAB */
- serial_out(&kdb_port_info, UART_LCR, UART_LCR_WLEN8 | UART_LCR_DLAB);
- serial_out(&kdb_port_info, UART_DLL, t & 0xff);/* LS of divisor */
- serial_out(&kdb_port_info, UART_DLM, t >> 8); /* MS of divisor */
- /* reset DLAB */
- serial_out(&kdb_port_info, UART_LCR, UART_LCR_WLEN8);
-
- return speed;
-}
-
-int putDebugChar(char c)
-{
- return generic_putDebugChar(c);
-}
-
-char getDebugChar(void)
-{
- return generic_getDebugChar();
-}
-
-int rs_putDebugChar(char c)
-{
-
- if (!kdb_port_info.state) { /* need to init device first */
- return 0;
- }
-
- while ((serial_in(&kdb_port_info, UART_LSR) & UART_LSR_THRE) == 0)
- ;
-
- serial_out(&kdb_port_info, UART_TX, c);
-
- return 1;
-}
-
-char rs_getDebugChar(void)
-{
- if (!kdb_port_info.state) { /* need to init device first */
- return 0;
- }
-
- while (!(serial_in(&kdb_port_info, UART_LSR) & 1))
- ;
-
- return serial_in(&kdb_port_info, UART_RX);
-}
diff --git a/arch/mips/mti-malta/malta-setup.c b/arch/mips/mti-malta/malta-setup.c
index e7cad54..dc78b89 100644
--- a/arch/mips/mti-malta/malta-setup.c
+++ b/arch/mips/mti-malta/malta-setup.c
@@ -199,10 +199,6 @@ void __init plat_mem_setup(void)
*/
enable_dma(4);
-#ifdef CONFIG_KGDB
- kgdb_config();
-#endif
-
#ifdef CONFIG_DMA_COHERENT
if (mips_revision_sconid != MIPS_REVISION_SCON_BONITO)
panic("Hardware DMA cache coherency not supported");
diff --git a/arch/mips/nxp/pnx8550/common/Makefile b/arch/mips/nxp/pnx8550/common/Makefile
index 31cc1a5..dd9e7b1 100644
--- a/arch/mips/nxp/pnx8550/common/Makefile
+++ b/arch/mips/nxp/pnx8550/common/Makefile
@@ -24,6 +24,5 @@
obj-y := setup.o prom.o int.o reset.o time.o proc.o platform.o
obj-$(CONFIG_PCI) += pci.o
-obj-$(CONFIG_KGDB) += gdb_hook.o
EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/nxp/pnx8550/common/gdb_hook.c b/arch/mips/nxp/pnx8550/common/gdb_hook.c
deleted file mode 100644
index ad4624f..0000000
--- a/arch/mips/nxp/pnx8550/common/gdb_hook.c
+++ /dev/null
@@ -1,109 +0,0 @@
-/*
- * Carsten Langgaard, carstenl@mips.com
- * Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
- *
- * ########################################################################
- *
- * This program is free software; you can distribute it and/or modify it
- * under the terms of the GNU General Public License (Version 2) as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * ########################################################################
- *
- * This is the interface to the remote debugger stub.
- *
- */
-#include <linux/types.h>
-#include <linux/serial.h>
-#include <linux/serialP.h>
-#include <linux/serial_reg.h>
-#include <linux/serial_ip3106.h>
-
-#include <asm/serial.h>
-#include <asm/io.h>
-
-#include <uart.h>
-
-static struct serial_state rs_table[IP3106_NR_PORTS] = {
-};
-static struct async_struct kdb_port_info = {0};
-
-void rs_kgdb_hook(int tty_no)
-{
- struct serial_state *ser = &rs_table[tty_no];
-
- kdb_port_info.state = ser;
- kdb_port_info.magic = SERIAL_MAGIC;
- kdb_port_info.port = tty_no;
- kdb_port_info.flags = ser->flags;
-
- /*
- * Clear all interrupts
- */
- /* Clear all the transmitter FIFO counters (pointer and status) */
- ip3106_lcr(UART_BASE, tty_no) |= IP3106_UART_LCR_TX_RST;
- /* Clear all the receiver FIFO counters (pointer and status) */
- ip3106_lcr(UART_BASE, tty_no) |= IP3106_UART_LCR_RX_RST;
- /* Clear all interrupts */
- ip3106_iclr(UART_BASE, tty_no) = IP3106_UART_INT_ALLRX |
- IP3106_UART_INT_ALLTX;
-
- /*
- * Now, initialize the UART
- */
- ip3106_lcr(UART_BASE, tty_no) = IP3106_UART_LCR_8BIT;
- ip3106_baud(UART_BASE, tty_no) = 5; // 38400 Baud
-}
-
-int putDebugChar(char c)
-{
- /* Wait until FIFO not full */
- while (((ip3106_fifo(UART_BASE, kdb_port_info.port) & IP3106_UART_FIFO_TXFIFO) >> 16) >= 16)
- ;
- /* Send one char */
- ip3106_fifo(UART_BASE, kdb_port_info.port) = c;
-
- return 1;
-}
-
-char getDebugChar(void)
-{
- char ch;
-
- /* Wait until there is a char in the FIFO */
- while (!((ip3106_fifo(UART_BASE, kdb_port_info.port) &
- IP3106_UART_FIFO_RXFIFO) >> 8))
- ;
- /* Read one char */
- ch = ip3106_fifo(UART_BASE, kdb_port_info.port) &
- IP3106_UART_FIFO_RBRTHR;
- /* Advance the RX FIFO read pointer */
- ip3106_lcr(UART_BASE, kdb_port_info.port) |= IP3106_UART_LCR_RX_NEXT;
- return (ch);
-}
-
-void rs_disable_debug_interrupts(void)
-{
- ip3106_ien(UART_BASE, kdb_port_info.port) = 0; /* Disable all interrupts */
-}
-
-void rs_enable_debug_interrupts(void)
-{
- /* Clear all the transmitter FIFO counters (pointer and status) */
- ip3106_lcr(UART_BASE, kdb_port_info.port) |= IP3106_UART_LCR_TX_RST;
- /* Clear all the receiver FIFO counters (pointer and status) */
- ip3106_lcr(UART_BASE, kdb_port_info.port) |= IP3106_UART_LCR_RX_RST;
- /* Clear all interrupts */
- ip3106_iclr(UART_BASE, kdb_port_info.port) = IP3106_UART_INT_ALLRX |
- IP3106_UART_INT_ALLTX;
- ip3106_ien(UART_BASE, kdb_port_info.port) = IP3106_UART_INT_ALLRX; /* Enable RX interrupts */
-}
diff --git a/arch/mips/nxp/pnx8550/common/setup.c b/arch/mips/nxp/pnx8550/common/setup.c
index 92d764c..2aed50f 100644
--- a/arch/mips/nxp/pnx8550/common/setup.c
+++ b/arch/mips/nxp/pnx8550/common/setup.c
@@ -47,7 +47,6 @@ extern void pnx8550_machine_halt(void);
extern void pnx8550_machine_power_off(void);
extern struct resource ioport_resource;
extern struct resource iomem_resource;
-extern void rs_kgdb_hook(int tty_no);
extern char *prom_getcmdline(void);
struct resource standard_io_resources[] = {
@@ -142,16 +141,5 @@ void __init plat_mem_setup(void)
ip3106_baud(UART_BASE, pnx8550_console_port) = 5;
}
-#ifdef CONFIG_KGDB
- argptr = prom_getcmdline();
- if ((argptr = strstr(argptr, "kgdb=ttyS")) != NULL) {
- int line;
- argptr += strlen("kgdb=ttyS");
- line = *argptr == '0' ? 0 : 1;
- rs_kgdb_hook(line);
- pr_info("KGDB: Using ttyS%i for session, "
- "please connect your debugger\n", line ? 1 : 0);
- }
-#endif
return;
}
diff --git a/arch/mips/pmc-sierra/msp71xx/msp_serial.c b/arch/mips/pmc-sierra/msp71xx/msp_serial.c
index 9de3430..f726162 100644
--- a/arch/mips/pmc-sierra/msp71xx/msp_serial.c
+++ b/arch/mips/pmc-sierra/msp71xx/msp_serial.c
@@ -38,68 +38,6 @@
#include <msp_int.h>
#include <msp_regs.h>
-#ifdef CONFIG_KGDB
-/*
- * kgdb uses serial port 1 so the console can remain on port 0.
- * To use port 0 change the definition to read as follows:
- * #define DEBUG_PORT_BASE KSEG1ADDR(MSP_UART0_BASE)
- */
-#define DEBUG_PORT_BASE KSEG1ADDR(MSP_UART1_BASE)
-
-int putDebugChar(char c)
-{
- volatile uint32_t *uart = (volatile uint32_t *)DEBUG_PORT_BASE;
- uint32_t val = (uint32_t)c;
-
- local_irq_disable();
- while( !(uart[5] & 0x20) ); /* Wait for TXRDY */
- uart[0] = val;
- while( !(uart[5] & 0x20) ); /* Wait for TXRDY */
- local_irq_enable();
-
- return 1;
-}
-
-char getDebugChar(void)
-{
- volatile uint32_t *uart = (volatile uint32_t *)DEBUG_PORT_BASE;
- uint32_t val;
-
- while( !(uart[5] & 0x01) ); /* Wait for RXRDY */
- val = uart[0];
-
- return (char)val;
-}
-
-void initDebugPort(unsigned int uartclk, unsigned int baudrate)
-{
- unsigned int baud_divisor = (uartclk + 8 * baudrate)/(16 * baudrate);
-
- /* Enable FIFOs */
- writeb(UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR |
- UART_FCR_CLEAR_XMIT | UART_FCR_TRIGGER_4,
- (char *)DEBUG_PORT_BASE + (UART_FCR * 4));
-
- /* Select brtc divisor */
- writeb(UART_LCR_DLAB, (char *)DEBUG_PORT_BASE + (UART_LCR * 4));
-
- /* Store divisor lsb */
- writeb(baud_divisor, (char *)DEBUG_PORT_BASE + (UART_TX * 4));
-
- /* Store divisor msb */
- writeb(baud_divisor >> 8, (char *)DEBUG_PORT_BASE + (UART_IER * 4));
-
- /* Set 8N1 mode */
- writeb(UART_LCR_WLEN8, (char *)DEBUG_PORT_BASE + (UART_LCR * 4));
-
- /* Disable flow control */
- writeb(0, (char *)DEBUG_PORT_BASE + (UART_MCR * 4));
-
- /* Disable receive interrupt(!) */
- writeb(0, (char *)DEBUG_PORT_BASE + (UART_IER * 4));
-}
-#endif
-
void __init msp_serial_setup(void)
{
char *s;
@@ -139,17 +77,6 @@ void __init msp_serial_setup(void)
case MACH_MSP7120_FPGA:
/* Enable UART1 on MSP4200 and MSP7120 */
*GPIO_CFG2_REG = 0x00002299;
-
-#ifdef CONFIG_KGDB
- /* Initialize UART1 for kgdb since PMON doesn't */
- if( DEBUG_PORT_BASE == KSEG1ADDR(MSP_UART1_BASE) ) {
- if( mips_machtype == MACH_MSP4200_FPGA
- || mips_machtype == MACH_MSP7120_FPGA )
- initDebugPort(uartclk, 19200);
- else
- initDebugPort(uartclk, 57600);
- }
-#endif
break;
default:
diff --git a/arch/mips/pmc-sierra/yosemite/Makefile b/arch/mips/pmc-sierra/yosemite/Makefile
index 8fd9a04..b16f95c 100644
--- a/arch/mips/pmc-sierra/yosemite/Makefile
+++ b/arch/mips/pmc-sierra/yosemite/Makefile
@@ -4,7 +4,6 @@
obj-y += irq.o prom.o py-console.o setup.o
-obj-$(CONFIG_KGDB) += dbg_io.o
obj-$(CONFIG_SMP) += smp.o
EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/pmc-sierra/yosemite/dbg_io.c b/arch/mips/pmc-sierra/yosemite/dbg_io.c
deleted file mode 100644
index 6362c70..0000000
--- a/arch/mips/pmc-sierra/yosemite/dbg_io.c
+++ /dev/null
@@ -1,180 +0,0 @@
-/*
- * Copyright 2003 PMC-Sierra
- * Author: Manish Lachwani (lachwani@pmc-sierra.com)
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-/*
- * Support for KGDB for the Yosemite board. We make use of single serial
- * port to be used for KGDB as well as console. The second serial port
- * seems to be having a problem. Single IRQ is allocated for both the
- * ports. Hence, the interrupt routing code needs to figure out whether
- * the interrupt came from channel A or B.
- */
-
-#include <asm/serial.h>
-
-/*
- * Baud rate, Parity, Data and Stop bit settings for the
- * serial port on the Yosemite. Note that the Early printk
- * patch has been added. So, we should be all set to go
- */
-#define YOSEMITE_BAUD_2400 2400
-#define YOSEMITE_BAUD_4800 4800
-#define YOSEMITE_BAUD_9600 9600
-#define YOSEMITE_BAUD_19200 19200
-#define YOSEMITE_BAUD_38400 38400
-#define YOSEMITE_BAUD_57600 57600
-#define YOSEMITE_BAUD_115200 115200
-
-#define YOSEMITE_PARITY_NONE 0
-#define YOSEMITE_PARITY_ODD 0x08
-#define YOSEMITE_PARITY_EVEN 0x18
-#define YOSEMITE_PARITY_MARK 0x28
-#define YOSEMITE_PARITY_SPACE 0x38
-
-#define YOSEMITE_DATA_5BIT 0x0
-#define YOSEMITE_DATA_6BIT 0x1
-#define YOSEMITE_DATA_7BIT 0x2
-#define YOSEMITE_DATA_8BIT 0x3
-
-#define YOSEMITE_STOP_1BIT 0x0
-#define YOSEMITE_STOP_2BIT 0x4
-
-/* This is crucial */
-#define SERIAL_REG_OFS 0x1
-
-#define SERIAL_RCV_BUFFER 0x0
-#define SERIAL_TRANS_HOLD 0x0
-#define SERIAL_SEND_BUFFER 0x0
-#define SERIAL_INTR_ENABLE (1 * SERIAL_REG_OFS)
-#define SERIAL_INTR_ID (2 * SERIAL_REG_OFS)
-#define SERIAL_DATA_FORMAT (3 * SERIAL_REG_OFS)
-#define SERIAL_LINE_CONTROL (3 * SERIAL_REG_OFS)
-#define SERIAL_MODEM_CONTROL (4 * SERIAL_REG_OFS)
-#define SERIAL_RS232_OUTPUT (4 * SERIAL_REG_OFS)
-#define SERIAL_LINE_STATUS (5 * SERIAL_REG_OFS)
-#define SERIAL_MODEM_STATUS (6 * SERIAL_REG_OFS)
-#define SERIAL_RS232_INPUT (6 * SERIAL_REG_OFS)
-#define SERIAL_SCRATCH_PAD (7 * SERIAL_REG_OFS)
-
-#define SERIAL_DIVISOR_LSB (0 * SERIAL_REG_OFS)
-#define SERIAL_DIVISOR_MSB (1 * SERIAL_REG_OFS)
-
-/*
- * Functions to READ and WRITE to serial port 0
- */
-#define SERIAL_READ(ofs) (*((volatile unsigned char*) \
- (TITAN_SERIAL_BASE + ofs)))
-
-#define SERIAL_WRITE(ofs, val) ((*((volatile unsigned char*) \
- (TITAN_SERIAL_BASE + ofs))) = val)
-
-/*
- * Functions to READ and WRITE to serial port 1
- */
-#define SERIAL_READ_1(ofs) (*((volatile unsigned char*) \
- (TITAN_SERIAL_BASE_1 + ofs)))
-
-#define SERIAL_WRITE_1(ofs, val) ((*((volatile unsigned char*) \
- (TITAN_SERIAL_BASE_1 + ofs))) = val)
-
-/*
- * Second serial port initialization
- */
-void init_second_port(void)
-{
- /* Disable Interrupts */
- SERIAL_WRITE_1(SERIAL_LINE_CONTROL, 0x0);
- SERIAL_WRITE_1(SERIAL_INTR_ENABLE, 0x0);
-
- {
- unsigned int divisor;
-
- SERIAL_WRITE_1(SERIAL_LINE_CONTROL, 0x80);
- divisor = TITAN_SERIAL_BASE_BAUD / YOSEMITE_BAUD_115200;
- SERIAL_WRITE_1(SERIAL_DIVISOR_LSB, divisor & 0xff);
-
- SERIAL_WRITE_1(SERIAL_DIVISOR_MSB,
- (divisor & 0xff00) >> 8);
- SERIAL_WRITE_1(SERIAL_LINE_CONTROL, 0x0);
- }
-
- SERIAL_WRITE_1(SERIAL_DATA_FORMAT, YOSEMITE_DATA_8BIT |
- YOSEMITE_PARITY_NONE | YOSEMITE_STOP_1BIT);
-
- /* Enable Interrupts */
- SERIAL_WRITE_1(SERIAL_INTR_ENABLE, 0xf);
-}
-
-/* Initialize the serial port for KGDB debugging */
-void debugInit(unsigned int baud, unsigned char data, unsigned char parity,
- unsigned char stop)
-{
- /* Disable Interrupts */
- SERIAL_WRITE(SERIAL_LINE_CONTROL, 0x0);
- SERIAL_WRITE(SERIAL_INTR_ENABLE, 0x0);
-
- {
- unsigned int divisor;
-
- SERIAL_WRITE(SERIAL_LINE_CONTROL, 0x80);
-
- divisor = TITAN_SERIAL_BASE_BAUD / baud;
- SERIAL_WRITE(SERIAL_DIVISOR_LSB, divisor & 0xff);
-
- SERIAL_WRITE(SERIAL_DIVISOR_MSB, (divisor & 0xff00) >> 8);
- SERIAL_WRITE(SERIAL_LINE_CONTROL, 0x0);
- }
-
- SERIAL_WRITE(SERIAL_DATA_FORMAT, data | parity | stop);
-}
-
-static int remoteDebugInitialized = 0;
-
-unsigned char getDebugChar(void)
-{
- if (!remoteDebugInitialized) {
- remoteDebugInitialized = 1;
- debugInit(YOSEMITE_BAUD_115200,
- YOSEMITE_DATA_8BIT,
- YOSEMITE_PARITY_NONE, YOSEMITE_STOP_1BIT);
- }
-
- while ((SERIAL_READ(SERIAL_LINE_STATUS) & 0x1) == 0);
- return SERIAL_READ(SERIAL_RCV_BUFFER);
-}
-
-int putDebugChar(unsigned char byte)
-{
- if (!remoteDebugInitialized) {
- remoteDebugInitialized = 1;
- debugInit(YOSEMITE_BAUD_115200,
- YOSEMITE_DATA_8BIT,
- YOSEMITE_PARITY_NONE, YOSEMITE_STOP_1BIT);
- }
-
- while ((SERIAL_READ(SERIAL_LINE_STATUS) & 0x20) == 0);
- SERIAL_WRITE(SERIAL_SEND_BUFFER, byte);
-
- return 1;
-}
diff --git a/arch/mips/pmc-sierra/yosemite/irq.c b/arch/mips/pmc-sierra/yosemite/irq.c
index 4decc28..5f673eb 100644
--- a/arch/mips/pmc-sierra/yosemite/irq.c
+++ b/arch/mips/pmc-sierra/yosemite/irq.c
@@ -141,10 +141,6 @@ asmlinkage void plat_irq_dispatch(void)
}
}
-#ifdef CONFIG_KGDB
-extern void init_second_port(void);
-#endif
-
/*
* Initialize the next level interrupt handler
*/
@@ -156,11 +152,6 @@ void __init arch_init_irq(void)
rm7k_cpu_irq_init();
rm9k_cpu_irq_init();
-#ifdef CONFIG_KGDB
- /* At this point, initialize the second serial port */
- init_second_port();
-#endif
-
#ifdef CONFIG_GDB_CONSOLE
register_gdb_console();
#endif
diff --git a/arch/mips/sgi-ip22/ip22-setup.c b/arch/mips/sgi-ip22/ip22-setup.c
index 5f389ee..0adcea5 100644
--- a/arch/mips/sgi-ip22/ip22-setup.c
+++ b/arch/mips/sgi-ip22/ip22-setup.c
@@ -81,30 +81,6 @@ void __init plat_mem_setup(void)
add_preferred_console("arc", 0, NULL);
}
-#ifdef CONFIG_KGDB
- {
- char *kgdb_ttyd = prom_getcmdline();
-
- if ((kgdb_ttyd = strstr(kgdb_ttyd, "kgdb=ttyd")) != NULL) {
- int line;
- kgdb_ttyd += strlen("kgdb=ttyd");
- if (*kgdb_ttyd != '1' && *kgdb_ttyd != '2')
- printk(KERN_INFO "KGDB: Uknown serial line /dev/ttyd%c"
- ", falling back to /dev/ttyd1\n", *kgdb_ttyd);
- line = *kgdb_ttyd == '2' ? 0 : 1;
- printk(KERN_INFO "KGDB: Using serial line /dev/ttyd%d for "
- "session\n", line ? 1 : 2);
- rs_kgdb_hook(line);
-
- printk(KERN_INFO "KGDB: Using serial line /dev/ttyd%d for "
- "session, please connect your debugger\n", line ? 1:2);
-
- kgdb_enabled = 1;
- /* Breakpoints and stuff are in sgi_irq_setup() */
- }
- }
-#endif
-
#if defined(CONFIG_VT) && defined(CONFIG_SGI_NEWPORT_CONSOLE)
{
ULONG *gfxinfo;
diff --git a/arch/mips/sgi-ip27/Makefile b/arch/mips/sgi-ip27/Makefile
index e0a6871..31f4931 100644
--- a/arch/mips/sgi-ip27/Makefile
+++ b/arch/mips/sgi-ip27/Makefile
@@ -7,7 +7,6 @@ obj-y := ip27-berr.o ip27-irq.o ip27-init.o ip27-klconfig.o ip27-klnuma.o \
ip27-xtalk.o
obj-$(CONFIG_EARLY_PRINTK) += ip27-console.o
-obj-$(CONFIG_KGDB) += ip27-dbgio.o
obj-$(CONFIG_SMP) += ip27-smp.o
EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/sgi-ip27/ip27-dbgio.c b/arch/mips/sgi-ip27/ip27-dbgio.c
deleted file mode 100644
index 08fd88b..0000000
--- a/arch/mips/sgi-ip27/ip27-dbgio.c
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Copyright 2004 Ralf Baechle <ralf@linux-mips.org>
- */
-#include <asm/sn/addrs.h>
-#include <asm/sn/sn0/hub.h>
-#include <asm/sn/klconfig.h>
-#include <asm/sn/ioc3.h>
-#include <asm/sn/sn_private.h>
-
-#include <linux/serial.h>
-#include <linux/serial_core.h>
-#include <linux/serial_reg.h>
-
-#define IOC3_CLK (22000000 / 3)
-#define IOC3_FLAGS (0)
-
-static inline struct ioc3_uartregs *console_uart(void)
-{
- struct ioc3 *ioc3;
-
- ioc3 = (struct ioc3 *)KL_CONFIG_CH_CONS_INFO(get_nasid())->memory_base;
-
- return &ioc3->sregs.uarta;
-}
-
-unsigned char getDebugChar(void)
-{
- struct ioc3_uartregs *uart = console_uart();
-
- while ((uart->iu_lsr & UART_LSR_DR) == 0);
- return uart->iu_rbr;
-}
-
-void putDebugChar(unsigned char c)
-{
- struct ioc3_uartregs *uart = console_uart();
-
- while ((uart->iu_lsr & UART_LSR_THRE) == 0);
- uart->iu_thr = c;
-}
diff --git a/arch/mips/sibyte/bcm1480/irq.c b/arch/mips/sibyte/bcm1480/irq.c
index db372a0..a35818e 100644
--- a/arch/mips/sibyte/bcm1480/irq.c
+++ b/arch/mips/sibyte/bcm1480/irq.c
@@ -57,30 +57,6 @@ static void bcm1480_set_affinity(unsigned int irq, cpumask_t mask);
extern unsigned long ht_eoi_space;
#endif
-#ifdef CONFIG_KGDB
-#include <asm/gdb-stub.h>
-extern void breakpoint(void);
-static int kgdb_irq;
-#ifdef CONFIG_GDB_CONSOLE
-extern void register_gdb_console(void);
-#endif
-
-/* kgdb is on when configured. Pass "nokgdb" kernel arg to turn it off */
-static int kgdb_flag = 1;
-static int __init nokgdb(char *str)
-{
- kgdb_flag = 0;
- return 1;
-}
-__setup("nokgdb", nokgdb);
-
-/* Default to UART1 */
-int kgdb_port = 1;
-#ifdef CONFIG_SERIAL_SB1250_DUART
-extern char sb1250_duart_present[];
-#endif
-#endif
-
static struct irq_chip bcm1480_irq_type = {
.name = "BCM1480-IMR",
.ack = ack_bcm1480_irq,
@@ -355,61 +331,10 @@ void __init arch_init_irq(void)
* does its own management of IP7.
*/
-#ifdef CONFIG_KGDB
- imask |= STATUSF_IP6;
-#endif
/* Enable necessary IPs, disable the rest */
change_c0_status(ST0_IM, imask);
-
-#ifdef CONFIG_KGDB
- if (kgdb_flag) {
- kgdb_irq = K_BCM1480_INT_UART_0 + kgdb_port;
-
-#ifdef CONFIG_SERIAL_SB1250_DUART
- sb1250_duart_present[kgdb_port] = 0;
-#endif
- /* Setup uart 1 settings, mapper */
- /* QQQ FIXME */
- __raw_writeq(M_DUART_IMR_BRK, IOADDR(A_DUART_IMRREG(kgdb_port)));
-
- __raw_writeq(IMR_IP6_VAL,
- IOADDR(A_BCM1480_IMR_REGISTER(0, R_BCM1480_IMR_INTERRUPT_MAP_BASE_H) +
- (kgdb_irq << 3)));
- bcm1480_unmask_irq(0, kgdb_irq);
-
-#ifdef CONFIG_GDB_CONSOLE
- register_gdb_console();
-#endif
- printk("Waiting for GDB on UART port %d\n", kgdb_port);
- set_debug_traps();
- breakpoint();
- }
-#endif
-}
-
-#ifdef CONFIG_KGDB
-
-#include <linux/delay.h>
-
-#define duart_out(reg, val) csr_out32(val, IOADDR(A_DUART_CHANREG(kgdb_port, reg)))
-#define duart_in(reg) csr_in32(IOADDR(A_DUART_CHANREG(kgdb_port, reg)))
-
-static void bcm1480_kgdb_interrupt(void)
-{
- /*
- * Clear break-change status (allow some time for the remote
- * host to stop the break, since we would see another
- * interrupt on the end-of-break too)
- */
- kstat.irqs[smp_processor_id()][kgdb_irq]++;
- mdelay(500);
- duart_out(R_DUART_CMD, V_DUART_MISC_CMD_RESET_BREAK_INT |
- M_DUART_RX_EN | M_DUART_TX_EN);
- set_async_breakpoint(&get_irq_regs()->cp0_epc);
}
-#endif /* CONFIG_KGDB */
-
extern void bcm1480_mailbox_interrupt(void);
static inline void dispatch_ip2(void)
@@ -462,11 +387,6 @@ asmlinkage void plat_irq_dispatch(void)
bcm1480_mailbox_interrupt();
#endif
-#ifdef CONFIG_KGDB
- else if (pending & CAUSEF_IP6)
- bcm1480_kgdb_interrupt(); /* KGDB (uart 1) */
-#endif
-
else if (pending & CAUSEF_IP2)
dispatch_ip2();
}
diff --git a/arch/mips/sibyte/cfe/setup.c b/arch/mips/sibyte/cfe/setup.c
index fd9604d..3de30f7 100644
--- a/arch/mips/sibyte/cfe/setup.c
+++ b/arch/mips/sibyte/cfe/setup.c
@@ -59,10 +59,6 @@ int cfe_cons_handle;
extern unsigned long initrd_start, initrd_end;
#endif
-#ifdef CONFIG_KGDB
-extern int kgdb_port;
-#endif
-
static void __noreturn cfe_linux_exit(void *arg)
{
int warm = *(int *)arg;
@@ -246,9 +242,6 @@ void __init prom_init(void)
int argc = fw_arg0;
char **envp = (char **) fw_arg2;
int *prom_vec = (int *) fw_arg3;
-#ifdef CONFIG_KGDB
- char *arg;
-#endif
_machine_restart = cfe_linux_restart;
_machine_halt = cfe_linux_halt;
@@ -309,13 +302,6 @@ void __init prom_init(void)
}
}
-#ifdef CONFIG_KGDB
- if ((arg = strstr(arcs_cmdline, "kgdb=duart")) != NULL)
- kgdb_port = (arg[10] == '0') ? 0 : 1;
- else
- kgdb_port = 1;
-#endif
-
#ifdef CONFIG_BLK_DEV_INITRD
{
char *ptr;
diff --git a/arch/mips/sibyte/sb1250/irq.c b/arch/mips/sibyte/sb1250/irq.c
index eac9065..a515848 100644
--- a/arch/mips/sibyte/sb1250/irq.c
+++ b/arch/mips/sibyte/sb1250/irq.c
@@ -57,16 +57,6 @@ static void sb1250_set_affinity(unsigned int irq, cpumask_t mask);
extern unsigned long ldt_eoi_space;
#endif
-#ifdef CONFIG_KGDB
-static int kgdb_irq;
-
-/* Default to UART1 */
-int kgdb_port = 1;
-#ifdef CONFIG_SERIAL_SB1250_DUART
-extern char sb1250_duart_present[];
-#endif
-#endif
-
static struct irq_chip sb1250_irq_type = {
.name = "SB1250-IMR",
.ack = ack_sb1250_irq,
@@ -313,55 +303,10 @@ void __init arch_init_irq(void)
* does its own management of IP7.
*/
-#ifdef CONFIG_KGDB
- imask |= STATUSF_IP6;
-#endif
/* Enable necessary IPs, disable the rest */
change_c0_status(ST0_IM, imask);
-
-#ifdef CONFIG_KGDB
- if (kgdb_flag) {
- kgdb_irq = K_INT_UART_0 + kgdb_port;
-
-#ifdef CONFIG_SERIAL_SB1250_DUART
- sb1250_duart_present[kgdb_port] = 0;
-#endif
- /* Setup uart 1 settings, mapper */
- __raw_writeq(M_DUART_IMR_BRK,
- IOADDR(A_DUART_IMRREG(kgdb_port)));
-
- __raw_writeq(IMR_IP6_VAL,
- IOADDR(A_IMR_REGISTER(0,
- R_IMR_INTERRUPT_MAP_BASE) +
- (kgdb_irq << 3)));
- sb1250_unmask_irq(0, kgdb_irq);
- }
-#endif
-}
-
-#ifdef CONFIG_KGDB
-
-#include <linux/delay.h>
-
-#define duart_out(reg, val) csr_out32(val, IOADDR(A_DUART_CHANREG(kgdb_port, reg)))
-#define duart_in(reg) csr_in32(IOADDR(A_DUART_CHANREG(kgdb_port, reg)))
-
-static void sb1250_kgdb_interrupt(void)
-{
- /*
- * Clear break-change status (allow some time for the remote
- * host to stop the break, since we would see another
- * interrupt on the end-of-break too)
- */
- kstat_this_cpu.irqs[kgdb_irq]++;
- mdelay(500);
- duart_out(R_DUART_CMD, V_DUART_MISC_CMD_RESET_BREAK_INT |
- M_DUART_RX_EN | M_DUART_TX_EN);
- set_async_breakpoint(&get_irq_regs()->cp0_epc);
}
-#endif /* CONFIG_KGDB */
-
extern void sb1250_mailbox_interrupt(void);
static inline void dispatch_ip2(void)
@@ -407,11 +352,6 @@ asmlinkage void plat_irq_dispatch(void)
sb1250_mailbox_interrupt();
#endif
-#ifdef CONFIG_KGDB
- else if (pending & CAUSEF_IP6) /* KGDB (uart 1) */
- sb1250_kgdb_interrupt();
-#endif
-
else if (pending & CAUSEF_IP2)
dispatch_ip2();
else
diff --git a/arch/mips/sibyte/swarm/Makefile b/arch/mips/sibyte/swarm/Makefile
index 255d692..f18ba92 100644
--- a/arch/mips/sibyte/swarm/Makefile
+++ b/arch/mips/sibyte/swarm/Makefile
@@ -1,4 +1,3 @@
obj-y := setup.o rtc_xicor1241.o rtc_m41t81.o
obj-$(CONFIG_I2C_BOARDINFO) += swarm-i2c.o
-obj-$(CONFIG_KGDB) += dbg_io.o
diff --git a/arch/mips/sibyte/swarm/dbg_io.c b/arch/mips/sibyte/swarm/dbg_io.c
deleted file mode 100644
index b97ae30..0000000
--- a/arch/mips/sibyte/swarm/dbg_io.c
+++ /dev/null
@@ -1,76 +0,0 @@
-/*
- * kgdb debug routines for SiByte boards.
- *
- * Copyright (C) 2001 MontaVista Software Inc.
- * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- */
-
-/* -------------------- BEGINNING OF CONFIG --------------------- */
-
-#include <linux/delay.h>
-#include <asm/io.h>
-#include <asm/sibyte/sb1250.h>
-#include <asm/sibyte/sb1250_regs.h>
-#include <asm/sibyte/sb1250_uart.h>
-#include <asm/sibyte/sb1250_int.h>
-#include <asm/addrspace.h>
-
-/*
- * We use the second serial port for kgdb traffic.
- * 115200, 8, N, 1.
- */
-
-#define BAUD_RATE 115200
-#define CLK_DIVISOR V_DUART_BAUD_RATE(BAUD_RATE)
-#define DATA_BITS V_DUART_BITS_PER_CHAR_8 /* or 7 */
-#define PARITY V_DUART_PARITY_MODE_NONE /* or even */
-#define STOP_BITS M_DUART_STOP_BIT_LEN_1 /* or 2 */
-
-static int duart_initialized = 0; /* 0: need to be init'ed by kgdb */
-
-/* -------------------- END OF CONFIG --------------------- */
-extern int kgdb_port;
-
-#define duart_out(reg, val) csr_out32(val, IOADDR(A_DUART_CHANREG(kgdb_port, reg)))
-#define duart_in(reg) csr_in32(IOADDR(A_DUART_CHANREG(kgdb_port, reg)))
-
-void putDebugChar(unsigned char c);
-unsigned char getDebugChar(void);
-static void
-duart_init(int clk_divisor, int data, int parity, int stop)
-{
- duart_out(R_DUART_MODE_REG_1, data | parity);
- duart_out(R_DUART_MODE_REG_2, stop);
- duart_out(R_DUART_CLK_SEL, clk_divisor);
-
- duart_out(R_DUART_CMD, M_DUART_RX_EN | M_DUART_TX_EN); /* enable rx and tx */
-}
-
-void
-putDebugChar(unsigned char c)
-{
- if (!duart_initialized) {
- duart_initialized = 1;
- duart_init(CLK_DIVISOR, DATA_BITS, PARITY, STOP_BITS);
- }
- while ((duart_in(R_DUART_STATUS) & M_DUART_TX_RDY) == 0);
- duart_out(R_DUART_TX_HOLD, c);
-}
-
-unsigned char
-getDebugChar(void)
-{
- if (!duart_initialized) {
- duart_initialized = 1;
- duart_init(CLK_DIVISOR, DATA_BITS, PARITY, STOP_BITS);
- }
- while ((duart_in(R_DUART_STATUS) & M_DUART_RX_RDY) == 0) ;
- return duart_in(R_DUART_RX_HOLD);
-}
-
diff --git a/arch/mips/txx9/Kconfig b/arch/mips/txx9/Kconfig
index b92a134..b69901d 100644
--- a/arch/mips/txx9/Kconfig
+++ b/arch/mips/txx9/Kconfig
@@ -51,7 +51,6 @@ config SOC_TX4927
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_LITTLE_ENDIAN
select SYS_SUPPORTS_BIG_ENDIAN
- select SYS_SUPPORTS_KGDB
select GENERIC_HARDIRQS_NO__DO_IRQ
select GPIO_TXX9
@@ -72,7 +71,6 @@ config SOC_TX4938
select SYS_SUPPORTS_64BIT_KERNEL
select SYS_SUPPORTS_LITTLE_ENDIAN
select SYS_SUPPORTS_BIG_ENDIAN
- select SYS_SUPPORTS_KGDB
select GENERIC_HARDIRQS_NO__DO_IRQ
select GPIO_TXX9
diff --git a/arch/mips/txx9/generic/Makefile b/arch/mips/txx9/generic/Makefile
index 668fdaa..c48ad01 100644
--- a/arch/mips/txx9/generic/Makefile
+++ b/arch/mips/txx9/generic/Makefile
@@ -7,6 +7,5 @@ obj-$(CONFIG_PCI) += pci.o
obj-$(CONFIG_SOC_TX4927) += mem_tx4927.o irq_tx4927.o
obj-$(CONFIG_SOC_TX4938) += mem_tx4938.o irq_tx4938.o
obj-$(CONFIG_TOSHIBA_FPCIB0) += smsc_fdc37m81x.o
-obj-$(CONFIG_KGDB) += dbgio.o
EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/txx9/generic/dbgio.c b/arch/mips/txx9/generic/dbgio.c
deleted file mode 100644
index 33b9c67..0000000
--- a/arch/mips/txx9/generic/dbgio.c
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * linux/arch/mips/tx4938/common/dbgio.c
- *
- * kgdb interface for gdb
- *
- * Author: MontaVista Software, Inc.
- * source@mvista.com
- *
- * Copyright 2005 MontaVista Software Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Support for TX4938 in 2.6 - Hiroshi DOYU <Hiroshi_DOYU@montavista.co.jp>
- */
-
-#include <linux/types>
-
-extern u8 txx9_sio_kdbg_rd(void);
-extern int txx9_sio_kdbg_wr( u8 ch );
-
-u8 getDebugChar(void)
-{
- return (txx9_sio_kdbg_rd());
-}
-
-int putDebugChar(u8 byte)
-{
- return (txx9_sio_kdbg_wr(byte));
-}
-
diff --git a/arch/mips/txx9/jmr3927/Makefile b/arch/mips/txx9/jmr3927/Makefile
index ba292c9..20d61ac 100644
--- a/arch/mips/txx9/jmr3927/Makefile
+++ b/arch/mips/txx9/jmr3927/Makefile
@@ -3,6 +3,5 @@
#
obj-y += prom.o irq.o setup.o
-obj-$(CONFIG_KGDB) += kgdb_io.o
EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/txx9/jmr3927/kgdb_io.c b/arch/mips/txx9/jmr3927/kgdb_io.c
deleted file mode 100644
index 5bd757e..0000000
--- a/arch/mips/txx9/jmr3927/kgdb_io.c
+++ /dev/null
@@ -1,105 +0,0 @@
-/*
- * BRIEF MODULE DESCRIPTION
- * Low level uart routines to directly access a TX[34]927 SIO.
- *
- * Copyright 2001 MontaVista Software Inc.
- * Author: MontaVista Software, Inc.
- * ahennessy@mvista.com or source@mvista.com
- *
- * Based on arch/mips/ddb5xxx/ddb5477/kgdb_io.c
- *
- * Copyright (C) 2000-2001 Toshiba Corporation
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <asm/txx9/jmr3927.h>
-
-#define TIMEOUT 0xffffff
-
-static int remoteDebugInitialized = 0;
-static void debugInit(int baud);
-
-int putDebugChar(unsigned char c)
-{
- int i = 0;
-
- if (!remoteDebugInitialized) {
- remoteDebugInitialized = 1;
- debugInit(38400);
- }
-
- do {
- slow_down();
- i++;
- if (i>TIMEOUT) {
- break;
- }
- } while (!(tx3927_sioptr(0)->cisr & TXx927_SICISR_TXALS));
- tx3927_sioptr(0)->tfifo = c;
-
- return 1;
-}
-
-unsigned char getDebugChar(void)
-{
- int i = 0;
- int dicr;
- char c;
-
- if (!remoteDebugInitialized) {
- remoteDebugInitialized = 1;
- debugInit(38400);
- }
-
- /* diable RX int. */
- dicr = tx3927_sioptr(0)->dicr;
- tx3927_sioptr(0)->dicr = 0;
-
- do {
- slow_down();
- i++;
- if (i>TIMEOUT) {
- break;
- }
- } while (tx3927_sioptr(0)->disr & TXx927_SIDISR_UVALID)
- ;
- c = tx3927_sioptr(0)->rfifo;
-
- /* clear RX int. status */
- tx3927_sioptr(0)->disr &= ~TXx927_SIDISR_RDIS;
- /* enable RX int. */
- tx3927_sioptr(0)->dicr = dicr;
-
- return c;
-}
-
-static void debugInit(int baud)
-{
- tx3927_sioptr(0)->lcr = 0x020;
- tx3927_sioptr(0)->dicr = 0;
- tx3927_sioptr(0)->disr = 0x4100;
- tx3927_sioptr(0)->cisr = 0x014;
- tx3927_sioptr(0)->fcr = 0;
- tx3927_sioptr(0)->flcr = 0x02;
- tx3927_sioptr(0)->bgr = ((JMR3927_BASE_BAUD + baud / 2) / baud) |
- TXx927_SIBGR_BCLK_T0;
-}
--
1.5.5.1
^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PATCH 2/3] kgdb, mips: add arch support for the kernel's kgdb core
2008-07-18 17:08 ` [PATCH 1/3] kgdb, mips: Remove existing kgdb implementation Jason Wessel
@ 2008-07-18 17:08 ` Jason Wessel
2008-07-18 17:08 ` [PATCH 3/3] kgdb, mips: pad pt_regs on MIPS64 for function arguments in an exception Jason Wessel
` (2 more replies)
0 siblings, 3 replies; 12+ messages in thread
From: Jason Wessel @ 2008-07-18 17:08 UTC (permalink / raw)
To: linux-kernel; +Cc: ralf, linux-mips, Jason Wessel
The new kgdb architecture specific handler registers and unregisters
dynamically for exceptions depending on when you configure a kgdb I/O
driver. Asside from initializing the exceptions earlier in the boot
process, kgdb should have no impact on a device when it is compiled in
so long as an I/O module is not configured for use.
There have been quite a number of contributors during the existence
of this patch (see arch/mips/kernel/kgdb.c).
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
---
arch/mips/Kconfig | 1 +
arch/mips/kernel/Makefile | 1 +
arch/mips/kernel/irq.c | 15 ++
arch/mips/kernel/kgdb.c | 295 ++++++++++++++++++++++++++++++++++
arch/mips/kernel/kgdb_handler.S | 339 +++++++++++++++++++++++++++++++++++++++
arch/mips/kernel/traps.c | 6 +
include/asm-mips/asmmacro-32.h | 43 +++++
include/asm-mips/asmmacro-64.h | 99 ++++++++++++
include/asm-mips/kgdb.h | 54 ++++++
9 files changed, 853 insertions(+), 0 deletions(-)
create mode 100644 arch/mips/kernel/kgdb.c
create mode 100644 arch/mips/kernel/kgdb_handler.S
create mode 100644 include/asm-mips/kgdb.h
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 1c07cb9..8c1b36e 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -3,6 +3,7 @@ config MIPS
default y
select HAVE_IDE
select HAVE_OPROFILE
+ select HAVE_ARCH_KGDB
# Horrible source of confusion. Die, die, die ...
select EMBEDDED
select RTC_LIB
diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index 73ff048..a312d4c 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -71,6 +71,7 @@ obj-$(CONFIG_MIPS32_COMPAT) += linux32.o ptrace32.o signal32.o
obj-$(CONFIG_MIPS32_N32) += binfmt_elfn32.o scall64-n32.o signal_n32.o
obj-$(CONFIG_MIPS32_O32) += binfmt_elfo32.o scall64-o32.o
+obj-$(CONFIG_KGDB) += kgdb_handler.o kgdb.o
obj-$(CONFIG_PROC_FS) += proc.o
obj-$(CONFIG_64BIT) += cpu-bugs64.o
diff --git a/arch/mips/kernel/irq.c b/arch/mips/kernel/irq.c
index 8acba08..7f1337b 100644
--- a/arch/mips/kernel/irq.c
+++ b/arch/mips/kernel/irq.c
@@ -21,11 +21,16 @@
#include <linux/sched.h>
#include <linux/seq_file.h>
#include <linux/kallsyms.h>
+#include <linux/kgdb.h>
#include <asm/atomic.h>
#include <asm/system.h>
#include <asm/uaccess.h>
+#ifdef CONFIG_KGDB
+int kgdb_early_setup;
+#endif
+
static unsigned long irq_map[NR_IRQS / BITS_PER_LONG];
int allocate_irqno(void)
@@ -133,5 +138,15 @@ void __init init_IRQ(void)
for (i = 0; i < NR_IRQS; i++)
set_irq_noprobe(i);
+#ifdef CONFIG_KGDB
+ if (kgdb_early_setup)
+ return;
+#endif
+
arch_init_irq();
+
+#ifdef CONFIG_KGDB
+ if (!kgdb_early_setup)
+ kgdb_early_setup = 1;
+#endif
}
diff --git a/arch/mips/kernel/kgdb.c b/arch/mips/kernel/kgdb.c
new file mode 100644
index 0000000..d553d21
--- /dev/null
+++ b/arch/mips/kernel/kgdb.c
@@ -0,0 +1,295 @@
+/*
+ * arch/mips/kernel/kgdb.c
+ *
+ * Originally written by Glenn Engel, Lake Stevens Instrument Division
+ *
+ * Contributed by HP Systems
+ *
+ * Modified for SPARC by Stu Grossman, Cygnus Support.
+ *
+ * Modified for Linux/MIPS (and MIPS in general) by Andreas Busse
+ * Send complaints, suggestions etc. to <andy@waldorf-gmbh.de>
+ *
+ * Copyright (C) 1995 Andreas Busse
+ *
+ * Copyright (C) 2003 MontaVista Software Inc.
+ * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
+ *
+ * Copyright (C) 2004-2005 MontaVista Software Inc.
+ * Author: Manish Lachwani, mlachwani@mvista.com or manish@koffee-break.com
+ *
+ * Copyright (C) 2007-2008 Wind River Systems, Inc.
+ * Author: Jason Wessel, jason.wessel@windriver.com
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <linux/ptrace.h> /* for linux pt_regs struct */
+#include <asm/system.h>
+#include <linux/kgdb.h>
+#include <linux/init.h>
+#include <linux/kdebug.h>
+#include <asm/inst.h>
+#include <asm/gdb-stub.h>
+#include <asm/cacheflush.h>
+
+static struct hard_trap_info {
+ unsigned char tt; /* Trap type code for MIPS R3xxx and R4xxx */
+ unsigned char signo; /* Signal that we map this trap into */
+} hard_trap_info[] = {
+ { 6, SIGBUS }, /* instruction bus error */
+ { 7, SIGBUS }, /* data bus error */
+ { 9, SIGTRAP }, /* break */
+/* { 11, SIGILL }, */ /* CPU unusable */
+ { 12, SIGFPE }, /* overflow */
+ { 13, SIGTRAP }, /* trap */
+ { 14, SIGSEGV }, /* virtual instruction cache coherency */
+ { 15, SIGFPE }, /* floating point exception */
+ { 23, SIGSEGV }, /* watch */
+ { 31, SIGSEGV }, /* virtual data cache coherency */
+ { 0, 0} /* Must be last */
+};
+
+/* Save the normal trap handlers for user-mode traps. */
+void *saved_vectors[32];
+
+static void kgdb_call_nmi_hook(void *ignored)
+{
+ kgdb_nmicallback(raw_smp_processor_id(), (void *)0);
+}
+
+void kgdb_roundup_cpus(unsigned long flags)
+{
+ local_irq_enable();
+ smp_call_function(kgdb_call_nmi_hook, NULL, NULL);
+ local_irq_disable();
+}
+
+static int compute_signal(int tt)
+{
+ struct hard_trap_info *ht;
+
+ for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
+ if (ht->tt == tt)
+ return ht->signo;
+
+ return SIGHUP; /* default for things we don't know about */
+}
+
+/*
+ * Set up exception handlers for tracing and breakpoints
+ */
+void handle_exception(struct pt_regs *regs)
+{
+ int trap = (regs->cp0_cause & 0x7c) >> 2;
+
+ if (fixup_exception(regs))
+ return;
+
+ if (atomic_read(&kgdb_active) != -1)
+ kgdb_nmicallback(smp_processor_id(), regs);
+
+ if (atomic_read(&kgdb_setting_breakpoint))
+ if ((trap == 9) && (regs->cp0_epc == (unsigned long)breakinst))
+ regs->cp0_epc += 4;
+
+ kgdb_handle_exception(0, compute_signal(trap), 0, regs);
+
+ /* In SMP mode, __flush_cache_all does IPI */
+ local_irq_enable();
+ __flush_cache_all();
+}
+
+void set_debug_traps(void)
+{
+ struct hard_trap_info *ht;
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
+ saved_vectors[ht->tt] = set_except_vector(ht->tt, trap_low);
+
+ local_irq_restore(flags);
+}
+
+void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+ int reg;
+#if (KGDB_GDB_REG_SIZE == 32)
+ u32 *ptr = (u32 *)gdb_regs;
+#else
+ u64 *ptr = (u64 *)gdb_regs;
+#endif
+
+ for (reg = 0; reg < 32; reg++)
+ *(ptr++) = regs->regs[reg];
+
+ *(ptr++) = regs->cp0_status;
+ *(ptr++) = regs->lo;
+ *(ptr++) = regs->hi;
+ *(ptr++) = regs->cp0_badvaddr;
+ *(ptr++) = regs->cp0_cause;
+ *(ptr++) = regs->cp0_epc;
+
+ return;
+}
+
+void gdb_regs_to_pt_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+
+ int reg;
+#if (KGDB_GDB_REG_SIZE == 32)
+ const u32 *ptr = (u32 *)gdb_regs;
+#else
+ const u64 *ptr = (u64 *)gdb_regs;
+#endif
+
+ for (reg = 0; reg < 32; reg++)
+ regs->regs[reg] = *(ptr++);
+
+ regs->cp0_status = *(ptr++);
+ regs->lo = *(ptr++);
+ regs->hi = *(ptr++);
+ regs->cp0_badvaddr = *(ptr++);
+ regs->cp0_cause = *(ptr++);
+ regs->cp0_epc = *(ptr++);
+
+ return;
+}
+
+/*
+ * Similar to regs_to_gdb_regs() except that process is sleeping and so
+ * we may not be able to get all the info.
+ */
+void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
+{
+ int reg;
+ struct thread_info *ti = task_thread_info(p);
+ unsigned long ksp = (unsigned long)ti + THREAD_SIZE - 32;
+ struct pt_regs *regs = (struct pt_regs *)ksp - 1;
+#if (KGDB_GDB_REG_SIZE == 32)
+ u32 *ptr = (u32 *)gdb_regs;
+#else
+ u64 *ptr = (u64 *)gdb_regs;
+#endif
+
+ for (reg = 0; reg < 16; reg++)
+ *(ptr++) = regs->regs[reg];
+
+ /* S0 - S7 */
+ for (reg = 16; reg < 24; reg++)
+ *(ptr++) = regs->regs[reg];
+
+ for (reg = 24; reg < 28; reg++)
+ *(ptr++) = 0;
+
+ /* GP, SP, FP, RA */
+ for (reg = 28; reg < 32; reg++)
+ *(ptr++) = regs->regs[reg];
+
+ *(ptr++) = regs->cp0_status;
+ *(ptr++) = regs->lo;
+ *(ptr++) = regs->hi;
+ *(ptr++) = regs->cp0_badvaddr;
+ *(ptr++) = regs->cp0_cause;
+ *(ptr++) = regs->cp0_epc;
+
+ return;
+}
+
+/*
+ * Calls linux_debug_hook before the kernel dies. If KGDB is enabled,
+ * then try to fall into the debugger
+ */
+static int kgdb_mips_notify(struct notifier_block *self, unsigned long cmd,
+ void *ptr)
+{
+ struct die_args *args = (struct die_args *)ptr;
+ struct pt_regs *regs = args->regs;
+ int trap = (regs->cp0_cause & 0x7c) >> 2;
+
+ /* See if KGDB is interested. */
+ if (user_mode(regs))
+ /* Userpace events, ignore. */
+ return NOTIFY_DONE;
+
+ kgdb_handle_exception(trap, compute_signal(trap), 0, regs);
+ return NOTIFY_OK;
+}
+
+static struct notifier_block kgdb_notifier = {
+ .notifier_call = kgdb_mips_notify,
+};
+
+/*
+ * Handle the 's' and 'c' commands
+ */
+int kgdb_arch_handle_exception(int vector, int signo, int err_code,
+ char *remcom_in_buffer, char *remcom_out_buffer,
+ struct pt_regs *regs)
+{
+ char *ptr;
+ unsigned long address;
+ int cpu = smp_processor_id();
+
+ switch (remcom_in_buffer[0]) {
+ case 's':
+ case 'c':
+ /* handle the optional parameter */
+ ptr = &remcom_in_buffer[1];
+ if (kgdb_hex2long(&ptr, &address))
+ regs->cp0_epc = address;
+
+ atomic_set(&kgdb_cpu_doing_single_step, -1);
+ if (remcom_in_buffer[0] == 's')
+ if (kgdb_contthread)
+ atomic_set(&kgdb_cpu_doing_single_step, cpu);
+
+ return 0;
+ }
+
+ return -1;
+}
+
+struct kgdb_arch arch_kgdb_ops = {
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+ .gdb_bpt_instr = {0xd},
+#else /* ! CONFIG_CPU_LITTLE_ENDIAN */
+ .gdb_bpt_instr = {0x00, 0x00, 0x00, 0x0d},
+#endif
+};
+
+/*
+ * We use kgdb_early_setup so that functions we need to call now don't
+ * cause trouble when called again later.
+ */
+int kgdb_arch_init(void)
+{
+ /* Set our traps. */
+ /* This needs to be done more finely grained again, paired in
+ * a before/after in kgdb_handle_exception(...) -- Tom */
+ set_debug_traps();
+ register_die_notifier(&kgdb_notifier);
+
+ return 0;
+}
+
+/**
+ * kgdb_arch_exit - Perform any architecture specific uninitalization.
+ *
+ * This function will handle the uninitalization of any architecture
+ * specific callbacks, for dynamic registration and unregistration.
+ */
+void kgdb_arch_exit(void)
+{
+ unregister_die_notifier(&kgdb_notifier);
+}
diff --git a/arch/mips/kernel/kgdb_handler.S b/arch/mips/kernel/kgdb_handler.S
new file mode 100644
index 0000000..6d7028d
--- /dev/null
+++ b/arch/mips/kernel/kgdb_handler.S
@@ -0,0 +1,339 @@
+/*
+ * arch/mips/kernel/kgdb_handler.S
+ *
+ * Copyright (C) 2007-2008 Wind River Systems, Inc.
+ *
+ * Copyright (C) 2004-2005 MontaVista Software Inc.
+ * Author: Manish Lachwani, mlachwani@mvista.com or manish@koffee-break.com
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+/*
+ * Trap Handler for the new KGDB framework. The main KGDB handler is
+ * handle_exception that will be called from here
+ *
+ */
+
+#include <linux/sys.h>
+
+#include <asm/asm.h>
+#include <asm/errno.h>
+#include <asm/mipsregs.h>
+#include <asm/regdef.h>
+#include <asm/stackframe.h>
+#include <asm/gdb-stub.h>
+
+#ifdef CONFIG_32BIT
+#define DMFC0 mfc0
+#define DMTC0 mtc0
+#define LDC1 lwc1
+#define SDC1 swc1
+#endif
+#ifdef CONFIG_64BIT
+#define DMFC0 dmfc0
+#define DMTC0 dmtc0
+#define LDC1 ldc1
+#define SDC1 sdc1
+#endif
+
+#include <asm/asmmacro.h>
+
+/*
+ * [jsun] We reserves about 2x GDB_FR_SIZE in stack. The lower (addressed)
+ * part is used to store registers and passed to exception handler.
+ * The upper part is reserved for "call func" feature where gdb client
+ * saves some of the regs, setups call frame and passes args.
+ *
+ * A trace shows about 200 bytes are used to store about half of all regs.
+ * The rest should be big enough for frame setup and passing args.
+ */
+
+/*
+ * The low level trap handler
+ */
+ .align 5
+ NESTED(trap_low, GDB_FR_SIZE, sp)
+ .set noat
+ .set noreorder
+
+ mfc0 k0, CP0_STATUS
+ sll k0, 3 /* extract cu0 bit */
+ bltz k0, 1f
+ move k1, sp
+
+ /*
+ * Called from user mode, go somewhere else.
+ */
+#if defined(CONFIG_32BIT)
+ lui k1, %hi(saved_vectors)
+ mfc0 k0, CP0_CAUSE
+ andi k0, k0, 0x7c
+ add k1, k1, k0
+ lw k0, %lo(saved_vectors)(k1)
+#elif defined(CONFIG_64BIT) && !defined(CONFIG_BUILD_ELF32)
+ DMFC0 k0, CP0_CAUSE
+ lui k1, %highest(saved_vectors)
+ andi k0, k0, 0x7c /* mask exception type */
+ dsll k0, 1 /* turn into byte offset */
+ daddiu k1, %higher(saved_vectors)
+ dsll k1, k1, 16
+ daddiu k1, %hi(saved_vectors)
+ dsll k1, k1, 16
+ daddu k1, k1, k0
+ LONG_L k0, %lo(saved_vectors)(k1)
+#else
+#error "MIPS configuration is unsupported for kgdb!!"
+#endif
+ jr k0
+ nop
+1:
+ move k0, sp
+ PTR_SUBU sp, k1, GDB_FR_SIZE*2 # see comment above
+ LONG_S k0, GDB_FR_REG29(sp)
+ LONG_S $2, GDB_FR_REG2(sp)
+
+/*
+ * First save the CP0 and special registers
+ */
+
+ mfc0 v0, CP0_STATUS
+ LONG_S v0, GDB_FR_STATUS(sp)
+ mfc0 v0, CP0_CAUSE
+ LONG_S v0, GDB_FR_CAUSE(sp)
+ DMFC0 v0, CP0_EPC
+ LONG_S v0, GDB_FR_EPC(sp)
+ DMFC0 v0, CP0_BADVADDR
+ LONG_S v0, GDB_FR_BADVADDR(sp)
+ mfhi v0
+ LONG_S v0, GDB_FR_HI(sp)
+ mflo v0
+ LONG_S v0, GDB_FR_LO(sp)
+
+/*
+ * Now the integer registers
+ */
+
+ LONG_S zero, GDB_FR_REG0(sp) /* I know... */
+ LONG_S $1, GDB_FR_REG1(sp)
+ /* v0 already saved */
+ LONG_S $3, GDB_FR_REG3(sp)
+ LONG_S $4, GDB_FR_REG4(sp)
+ LONG_S $5, GDB_FR_REG5(sp)
+ LONG_S $6, GDB_FR_REG6(sp)
+ LONG_S $7, GDB_FR_REG7(sp)
+ LONG_S $8, GDB_FR_REG8(sp)
+ LONG_S $9, GDB_FR_REG9(sp)
+ LONG_S $10, GDB_FR_REG10(sp)
+ LONG_S $11, GDB_FR_REG11(sp)
+ LONG_S $12, GDB_FR_REG12(sp)
+ LONG_S $13, GDB_FR_REG13(sp)
+ LONG_S $14, GDB_FR_REG14(sp)
+ LONG_S $15, GDB_FR_REG15(sp)
+ LONG_S $16, GDB_FR_REG16(sp)
+ LONG_S $17, GDB_FR_REG17(sp)
+ LONG_S $18, GDB_FR_REG18(sp)
+ LONG_S $19, GDB_FR_REG19(sp)
+ LONG_S $20, GDB_FR_REG20(sp)
+ LONG_S $21, GDB_FR_REG21(sp)
+ LONG_S $22, GDB_FR_REG22(sp)
+ LONG_S $23, GDB_FR_REG23(sp)
+ LONG_S $24, GDB_FR_REG24(sp)
+ LONG_S $25, GDB_FR_REG25(sp)
+ LONG_S $26, GDB_FR_REG26(sp)
+ LONG_S $27, GDB_FR_REG27(sp)
+ LONG_S $28, GDB_FR_REG28(sp)
+ /* sp already saved */
+ LONG_S $30, GDB_FR_REG30(sp)
+ LONG_S $31, GDB_FR_REG31(sp)
+
+ CLI /* disable interrupts */
+
+/*
+ * Followed by the floating point registers
+ */
+ mfc0 v0, CP0_STATUS /* FPU enabled? */
+ srl v0, v0, 16
+ andi v0, v0, (ST0_CU1 >> 16)
+
+ beqz v0,3f /* disabled, skip */
+ nop
+
+ li t0, 0
+#ifdef CONFIG_64BIT
+ mfc0 t0, CP0_STATUS
+#endif
+ fpu_save_double_kgdb sp t0 t1 # clobbers t1
+
+
+/*
+ * Current stack frame ptr
+ */
+
+3:
+ LONG_S sp, GDB_FR_FRP(sp)
+
+/*
+ * CP0 registers (R4000/R4400 unused registers skipped)
+ */
+
+ mfc0 v0, CP0_INDEX
+ LONG_S v0, GDB_FR_CP0_INDEX(sp)
+ mfc0 v0, CP0_RANDOM
+ LONG_S v0, GDB_FR_CP0_RANDOM(sp)
+ DMFC0 v0, CP0_ENTRYLO0
+ LONG_S v0, GDB_FR_CP0_ENTRYLO0(sp)
+ DMFC0 v0, CP0_ENTRYLO1
+ LONG_S v0, GDB_FR_CP0_ENTRYLO1(sp)
+ DMFC0 v0, CP0_CONTEXT
+ LONG_S v0, GDB_FR_CP0_CONTEXT(sp)
+ mfc0 v0, CP0_PAGEMASK
+ LONG_S v0, GDB_FR_CP0_PAGEMASK(sp)
+ mfc0 v0, CP0_WIRED
+ LONG_S v0, GDB_FR_CP0_WIRED(sp)
+ DMFC0 v0, CP0_ENTRYHI
+ LONG_S v0, GDB_FR_CP0_ENTRYHI(sp)
+ mfc0 v0, CP0_PRID
+ LONG_S v0, GDB_FR_CP0_PRID(sp)
+
+ .set at
+
+/*
+ * Continue with the higher level handler
+ */
+
+ move a0,sp
+
+ jal handle_exception
+ nop
+
+/*
+ * Restore all writable registers, in reverse order
+ */
+
+ .set noat
+
+ LONG_L v0, GDB_FR_CP0_ENTRYHI(sp)
+ LONG_L v1, GDB_FR_CP0_WIRED(sp)
+ DMTC0 v0, CP0_ENTRYHI
+ mtc0 v1, CP0_WIRED
+ LONG_L v0, GDB_FR_CP0_PAGEMASK(sp)
+ LONG_L v1, GDB_FR_CP0_ENTRYLO1(sp)
+ mtc0 v0, CP0_PAGEMASK
+ DMTC0 v1, CP0_ENTRYLO1
+ LONG_L v0, GDB_FR_CP0_ENTRYLO0(sp)
+ LONG_L v1, GDB_FR_CP0_INDEX(sp)
+ DMTC0 v0, CP0_ENTRYLO0
+ LONG_L v0, GDB_FR_CP0_CONTEXT(sp)
+ mtc0 v1, CP0_INDEX
+ DMTC0 v0, CP0_CONTEXT
+
+
+/*
+ * Next, the floating point registers
+ */
+ mfc0 v0, CP0_STATUS /* check if FPU is enabled */
+ srl v0, v0, 16
+ andi v0, v0, (ST0_CU1 >> 16)
+
+ beqz v0, 3f /* disabled, skip */
+ nop
+
+ li t0, 0
+#ifdef CONFIG_64BIT
+ mfc0 t0, CP0_STATUS
+#endif
+ fpu_restore_double_kgdb sp t0 t1 # clobbers t1
+
+
+/*
+ * Now the CP0 and integer registers
+ */
+
+3:
+ mfc0 t0, CP0_STATUS
+ ori t0, 0x1f
+ xori t0, 0x1f
+ mtc0 t0, CP0_STATUS
+
+ LONG_L v0, GDB_FR_STATUS(sp)
+ LONG_L v1, GDB_FR_EPC(sp)
+ mtc0 v0, CP0_STATUS
+ DMTC0 v1, CP0_EPC
+ LONG_L v0, GDB_FR_HI(sp)
+ LONG_L v1, GDB_FR_LO(sp)
+ mthi v0
+ mtlo v1
+ LONG_L $31, GDB_FR_REG31(sp)
+ LONG_L $30, GDB_FR_REG30(sp)
+ LONG_L $28, GDB_FR_REG28(sp)
+ LONG_L $27, GDB_FR_REG27(sp)
+ LONG_L $26, GDB_FR_REG26(sp)
+ LONG_L $25, GDB_FR_REG25(sp)
+ LONG_L $24, GDB_FR_REG24(sp)
+ LONG_L $23, GDB_FR_REG23(sp)
+ LONG_L $22, GDB_FR_REG22(sp)
+ LONG_L $21, GDB_FR_REG21(sp)
+ LONG_L $20, GDB_FR_REG20(sp)
+ LONG_L $19, GDB_FR_REG19(sp)
+ LONG_L $18, GDB_FR_REG18(sp)
+ LONG_L $17, GDB_FR_REG17(sp)
+ LONG_L $16, GDB_FR_REG16(sp)
+ LONG_L $15, GDB_FR_REG15(sp)
+ LONG_L $14, GDB_FR_REG14(sp)
+ LONG_L $13, GDB_FR_REG13(sp)
+ LONG_L $12, GDB_FR_REG12(sp)
+ LONG_L $11, GDB_FR_REG11(sp)
+ LONG_L $10, GDB_FR_REG10(sp)
+ LONG_L $9, GDB_FR_REG9(sp)
+ LONG_L $8, GDB_FR_REG8(sp)
+ LONG_L $7, GDB_FR_REG7(sp)
+ LONG_L $6, GDB_FR_REG6(sp)
+ LONG_L $5, GDB_FR_REG5(sp)
+ LONG_L $4, GDB_FR_REG4(sp)
+ LONG_L $3, GDB_FR_REG3(sp)
+ LONG_L $2, GDB_FR_REG2(sp)
+ LONG_L $1, GDB_FR_REG1(sp)
+#if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
+ LONG_L k0, GDB_FR_EPC(sp)
+ LONG_L $29, GDB_FR_REG29(sp) /* Deallocate stack */
+ jr k0
+ rfe
+#else
+ LONG_L sp, GDB_FR_REG29(sp) /* Deallocate stack */
+
+ .set mips3
+ eret
+ .set mips0
+#endif
+ .set at
+ .set reorder
+ END(trap_low)
+
+LEAF(kgdb_read_byte)
+4: lb t0, (a0)
+ sb t0, (a1)
+ li v0, 0
+ jr ra
+ .section __ex_table,"a"
+ PTR 4b, kgdbfault
+ .previous
+ END(kgdb_read_byte)
+
+LEAF(kgdb_write_byte)
+5: sb a0, (a1)
+ li v0, 0
+ jr ra
+ .section __ex_table,"a"
+ PTR 5b, kgdbfault
+ .previous
+ END(kgdb_write_byte)
+
+ .type kgdbfault@function
+ .ent kgdbfault
+
+kgdbfault: li v0, -EFAULT
+ jr ra
+ .end kgdbfault
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index b8ea4e9..129ee35 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -23,6 +23,7 @@
#include <linux/bootmem.h>
#include <linux/interrupt.h>
#include <linux/ptrace.h>
+#include <linux/kgdb.h>
#include <asm/bootinfo.h>
#include <asm/branch.h>
@@ -1537,6 +1538,11 @@ void __init trap_init(void)
extern char except_vec4;
unsigned long i;
+#if defined(CONFIG_KGDB)
+ if (kgdb_early_setup)
+ return; /* Already done */
+#endif
+
if (cpu_has_veic || cpu_has_vint)
ebase = (unsigned long) alloc_bootmem_low_pages(0x200 + VECTORSPACING*64);
else
diff --git a/include/asm-mips/asmmacro-32.h b/include/asm-mips/asmmacro-32.h
index 5de3963..ed9be99 100644
--- a/include/asm-mips/asmmacro-32.h
+++ b/include/asm-mips/asmmacro-32.h
@@ -11,6 +11,28 @@
#include <asm/regdef.h>
#include <asm/fpregdef.h>
#include <asm/mipsregs.h>
+#include <asm/gdb-stub.h>
+
+ .macro fpu_save_double_kgdb stack status tmp1 = t0
+ cfc1 \tmp1, fcr31
+ sdc1 $f0, GDB_FR_FPR0(\stack)
+ sdc1 $f2, GDB_FR_FPR2(\stack)
+ sdc1 $f4, GDB_FR_FPR4(\stack)
+ sdc1 $f6, GDB_FR_FPR6(\stack)
+ sdc1 $f8, GDB_FR_FPR8(\stack)
+ sdc1 $f10, GDB_FR_FPR10(\stack)
+ sdc1 $f12, GDB_FR_FPR12(\stack)
+ sdc1 $f14, GDB_FR_FPR14(\stack)
+ sdc1 $f16, GDB_FR_FPR16(\stack)
+ sdc1 $f18, GDB_FR_FPR18(\stack)
+ sdc1 $f20, GDB_FR_FPR20(\stack)
+ sdc1 $f22, GDB_FR_FPR22(\stack)
+ sdc1 $f24, GDB_FR_FPR24(\stack)
+ sdc1 $f26, GDB_FR_FPR26(\stack)
+ sdc1 $f28, GDB_FR_FPR28(\stack)
+ sdc1 $f30, GDB_FR_FPR30(\stack)
+ sw \tmp1, GDB_FR_FSR(\stack)
+ .endm
.macro fpu_save_double thread status tmp1=t0
cfc1 \tmp1, fcr31
@@ -91,6 +113,27 @@
ctc1 \tmp, fcr31
.endm
+ .macro fpu_restore_double_kgdb stack status tmp = t0
+ lw \tmp, GDB_FR_FSR(\stack)
+ ldc1 $f0, GDB_FR_FPR0(\stack)
+ ldc1 $f2, GDB_FR_FPR2(\stack)
+ ldc1 $f4, GDB_FR_FPR4(\stack)
+ ldc1 $f6, GDB_FR_FPR6(\stack)
+ ldc1 $f8, GDB_FR_FPR8(\stack)
+ ldc1 $f10, GDB_FR_FPR10(\stack)
+ ldc1 $f12, GDB_FR_FPR12(\stack)
+ ldc1 $f14, GDB_FR_FPR14(\stack)
+ ldc1 $f16, GDB_FR_FPR16(\stack)
+ ldc1 $f18, GDB_FR_FPR18(\stack)
+ ldc1 $f20, GDB_FR_FPR20(\stack)
+ ldc1 $f22, GDB_FR_FPR22(\stack)
+ ldc1 $f24, GDB_FR_FPR24(\stack)
+ ldc1 $f26, GDB_FR_FPR26(\stack)
+ ldc1 $f28, GDB_FR_FPR28(\stack)
+ ldc1 $f30, GDB_FR_FPR30(\stack)
+ ctc1 \tmp, fcr31
+ .endm
+
.macro fpu_restore_single thread tmp=t0
lw \tmp, THREAD_FCR31(\thread)
lwc1 $f0, THREAD_FPR0(\thread)
diff --git a/include/asm-mips/asmmacro-64.h b/include/asm-mips/asmmacro-64.h
index 225feef..9789218 100644
--- a/include/asm-mips/asmmacro-64.h
+++ b/include/asm-mips/asmmacro-64.h
@@ -12,6 +12,7 @@
#include <asm/regdef.h>
#include <asm/fpregdef.h>
#include <asm/mipsregs.h>
+#include <asm/gdb-stub.h>
.macro fpu_save_16even thread tmp=t0
cfc1 \tmp, fcr31
@@ -53,6 +54,46 @@
sdc1 $f31, THREAD_FPR31(\thread)
.endm
+ .macro fpu_save_16odd_kgdb stack
+ sdc1 $f1, GDB_FR_FPR1(\stack)
+ sdc1 $f3, GDB_FR_FPR3(\stack)
+ sdc1 $f5, GDB_FR_FPR5(\stack)
+ sdc1 $f7, GDB_FR_FPR7(\stack)
+ sdc1 $f9, GDB_FR_FPR9(\stack)
+ sdc1 $f11, GDB_FR_FPR11(\stack)
+ sdc1 $f13, GDB_FR_FPR13(\stack)
+ sdc1 $f15, GDB_FR_FPR15(\stack)
+ sdc1 $f17, GDB_FR_FPR17(\stack)
+ sdc1 $f19, GDB_FR_FPR19(\stack)
+ sdc1 $f21, GDB_FR_FPR21(\stack)
+ sdc1 $f23, GDB_FR_FPR23(\stack)
+ sdc1 $f25, GDB_FR_FPR25(\stack)
+ sdc1 $f27, GDB_FR_FPR27(\stack)
+ sdc1 $f29, GDB_FR_FPR29(\stack)
+ sdc1 $f31, GDB_FR_FPR31(\stack)
+ .endm
+
+ .macro fpu_save_16even_kgdb stack tmp = t0
+ cfc1 \tmp, fcr31
+ sdc1 $f0, GDB_FR_FPR0(\stack)
+ sdc1 $f2, GDB_FR_FPR2(\stack)
+ sdc1 $f4, GDB_FR_FPR4(\stack)
+ sdc1 $f6, GDB_FR_FPR6(\stack)
+ sdc1 $f8, GDB_FR_FPR8(\stack)
+ sdc1 $f10, GDB_FR_FPR10(\stack)
+ sdc1 $f12, GDB_FR_FPR12(\stack)
+ sdc1 $f14, GDB_FR_FPR14(\stack)
+ sdc1 $f16, GDB_FR_FPR16(\stack)
+ sdc1 $f18, GDB_FR_FPR18(\stack)
+ sdc1 $f20, GDB_FR_FPR20(\stack)
+ sdc1 $f22, GDB_FR_FPR22(\stack)
+ sdc1 $f24, GDB_FR_FPR24(\stack)
+ sdc1 $f26, GDB_FR_FPR26(\stack)
+ sdc1 $f28, GDB_FR_FPR28(\stack)
+ sdc1 $f30, GDB_FR_FPR30(\stack)
+ sw \tmp, GDB_FR_FSR(\stack)
+ .endm
+
.macro fpu_save_double thread status tmp
sll \tmp, \status, 5
bgez \tmp, 2f
@@ -61,6 +102,15 @@
fpu_save_16even \thread \tmp
.endm
+ .macro fpu_save_double_kgdb stack status tmp
+ sll \tmp, \status, 5
+ bgez \tmp, 2f
+ nop
+ fpu_save_16odd_kgdb \stack
+2:
+ fpu_save_16even_kgdb \stack \tmp
+ .endm
+
.macro fpu_restore_16even thread tmp=t0
lw \tmp, THREAD_FCR31(\thread)
ldc1 $f0, THREAD_FPR0(\thread)
@@ -101,6 +151,46 @@
ldc1 $f31, THREAD_FPR31(\thread)
.endm
+ .macro fpu_restore_16even_kgdb stack tmp = t0
+ lw \tmp, GDB_FR_FSR(\stack)
+ ldc1 $f0, GDB_FR_FPR0(\stack)
+ ldc1 $f2, GDB_FR_FPR2(\stack)
+ ldc1 $f4, GDB_FR_FPR4(\stack)
+ ldc1 $f6, GDB_FR_FPR6(\stack)
+ ldc1 $f8, GDB_FR_FPR8(\stack)
+ ldc1 $f10, GDB_FR_FPR10(\stack)
+ ldc1 $f12, GDB_FR_FPR12(\stack)
+ ldc1 $f14, GDB_FR_FPR14(\stack)
+ ldc1 $f16, GDB_FR_FPR16(\stack)
+ ldc1 $f18, GDB_FR_FPR18(\stack)
+ ldc1 $f20, GDB_FR_FPR20(\stack)
+ ldc1 $f22, GDB_FR_FPR22(\stack)
+ ldc1 $f24, GDB_FR_FPR24(\stack)
+ ldc1 $f26, GDB_FR_FPR26(\stack)
+ ldc1 $f28, GDB_FR_FPR28(\stack)
+ ldc1 $f30, GDB_FR_FPR30(\stack)
+ ctc1 \tmp, fcr31
+ .endm
+
+ .macro fpu_restore_16odd_kgdb stack
+ ldc1 $f1, GDB_FR_FPR1(\stack)
+ ldc1 $f3, GDB_FR_FPR3(\stack)
+ ldc1 $f5, GDB_FR_FPR5(\stack)
+ ldc1 $f7, GDB_FR_FPR7(\stack)
+ ldc1 $f9, GDB_FR_FPR9(\stack)
+ ldc1 $f11, GDB_FR_FPR11(\stack)
+ ldc1 $f13, GDB_FR_FPR13(\stack)
+ ldc1 $f15, GDB_FR_FPR15(\stack)
+ ldc1 $f17, GDB_FR_FPR17(\stack)
+ ldc1 $f19, GDB_FR_FPR19(\stack)
+ ldc1 $f21, GDB_FR_FPR21(\stack)
+ ldc1 $f23, GDB_FR_FPR23(\stack)
+ ldc1 $f25, GDB_FR_FPR25(\stack)
+ ldc1 $f27, GDB_FR_FPR27(\stack)
+ ldc1 $f29, GDB_FR_FPR29(\stack)
+ ldc1 $f31, GDB_FR_FPR31(\stack)
+ .endm
+
.macro fpu_restore_double thread status tmp
sll \tmp, \status, 5
bgez \tmp, 1f # 16 register mode?
@@ -109,6 +199,15 @@
1: fpu_restore_16even \thread \tmp
.endm
+ .macro fpu_restore_double_kgdb stack status tmp
+ sll \tmp, \status, 5
+ bgez \tmp, 1f # 16 register mode?
+ nop
+
+ fpu_restore_16odd_kgdb \stack
+1: fpu_restore_16even_kgdb \stack \tmp
+ .endm
+
.macro cpu_save_nonscratch thread
LONG_S s0, THREAD_REG16(\thread)
LONG_S s1, THREAD_REG17(\thread)
diff --git a/include/asm-mips/kgdb.h b/include/asm-mips/kgdb.h
new file mode 100644
index 0000000..0e0ed89
--- /dev/null
+++ b/include/asm-mips/kgdb.h
@@ -0,0 +1,54 @@
+#ifdef __KERNEL__
+#ifndef _ASM_KGDB_H_
+#define _ASM_KGDB_H_
+
+#include <asm/sgidefs.h>
+
+#ifndef __ASSEMBLY__
+#if (_MIPS_ISA == _MIPS_ISA_MIPS1) || (_MIPS_ISA == _MIPS_ISA_MIPS2) || \
+ (_MIPS_ISA == _MIPS_ISA_MIPS32)
+
+#define KGDB_GDB_REG_SIZE 32
+
+#elif (_MIPS_ISA == _MIPS_ISA_MIPS3) || (_MIPS_ISA == _MIPS_ISA_MIPS4) || \
+ (_MIPS_ISA == _MIPS_ISA_MIPS64)
+
+#ifdef CONFIG_32BIT
+#define KGDB_GDB_REG_SIZE 32
+#else /* CONFIG_CPU_32BIT */
+#define KGDB_GDB_REG_SIZE 64
+#endif
+#else
+#error "Need to set KGDB_GDB_REG_SIZE for MIPS ISA"
+#endif /* _MIPS_ISA */
+
+#define BUFMAX 2048
+#if (KGDB_GDB_REG_SIZE == 32)
+#define NUMREGBYTES (90*sizeof(u32))
+#define NUMCRITREGBYTES (12*sizeof(u32))
+#else
+#define NUMREGBYTES (90*sizeof(u64))
+#define NUMCRITREGBYTES (12*sizeof(u64))
+#endif
+#define BREAK_INSTR_SIZE 4
+static inline void arch_kgdb_breakpoint(void)
+{
+ __asm__ __volatile__(
+ ".globl breakinst\n\t"
+ ".set\tnoreorder\n\t"
+ "nop\n"
+ "breakinst:\tbreak\n\t"
+ "nop\n\t"
+ ".set\treorder");
+}
+#define CACHE_FLUSH_IS_SAFE 0
+
+extern int kgdb_early_setup;
+extern void *saved_vectors[32];
+extern void handle_exception(struct pt_regs *regs);
+extern void trap_low(void);
+extern void breakinst(void);
+
+#endif /* !__ASSEMBLY__ */
+#endif /* _ASM_KGDB_H_ */
+#endif /* __KERNEL__ */
--
1.5.5.1
^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PATCH 3/3] kgdb, mips: pad pt_regs on MIPS64 for function arguments in an exception
2008-07-18 17:08 ` [PATCH 2/3] kgdb, mips: add arch support for the kernel's kgdb core Jason Wessel
@ 2008-07-18 17:08 ` Jason Wessel
2008-07-18 17:31 ` [PATCH 2/3] kgdb, mips: add arch support for the kernel's kgdb core Atsushi Nemoto
2008-07-24 16:27 ` Atsushi Nemoto
2 siblings, 0 replies; 12+ messages in thread
From: Jason Wessel @ 2008-07-18 17:08 UTC (permalink / raw)
To: linux-kernel; +Cc: ralf, linux-mips, Jason Wessel
When using KGDB the pt_regs structure has the function arguments saved
to the stack. 48 bytes are required for MIPS 64 for this purpose.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
---
include/asm-mips/ptrace.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/include/asm-mips/ptrace.h b/include/asm-mips/ptrace.h
index 786f7e3..c3f535f 100644
--- a/include/asm-mips/ptrace.h
+++ b/include/asm-mips/ptrace.h
@@ -28,7 +28,7 @@
* system call/exception. As usual the registers k0/k1 aren't being saved.
*/
struct pt_regs {
-#ifdef CONFIG_32BIT
+#if defined(CONFIG_32BIT) || defined(CONFIG_KGDB)
/* Pad bytes for argument save space on the stack. */
unsigned long pad0[6];
#endif
--
1.5.5.1
^ permalink raw reply related [flat|nested] 12+ messages in thread
* Re: [PATCH 2/3] kgdb, mips: add arch support for the kernel's kgdb core
2008-07-18 17:08 ` [PATCH 2/3] kgdb, mips: add arch support for the kernel's kgdb core Jason Wessel
2008-07-18 17:08 ` [PATCH 3/3] kgdb, mips: pad pt_regs on MIPS64 for function arguments in an exception Jason Wessel
@ 2008-07-18 17:31 ` Atsushi Nemoto
2008-07-18 17:50 ` Jason Wessel
2008-07-24 16:27 ` Atsushi Nemoto
2 siblings, 1 reply; 12+ messages in thread
From: Atsushi Nemoto @ 2008-07-18 17:31 UTC (permalink / raw)
To: jason.wessel; +Cc: linux-kernel, ralf, linux-mips
On Fri, 18 Jul 2008 12:08:47 -0500, Jason Wessel <jason.wessel@windriver.com> wrote:
> The new kgdb architecture specific handler registers and unregisters
> dynamically for exceptions depending on when you configure a kgdb I/O
> driver. Asside from initializing the exceptions earlier in the boot
> process, kgdb should have no impact on a device when it is compiled in
> so long as an I/O module is not configured for use.
...
> @@ -133,5 +138,15 @@ void __init init_IRQ(void)
> for (i = 0; i < NR_IRQS; i++)
> set_irq_noprobe(i);
>
> +#ifdef CONFIG_KGDB
> + if (kgdb_early_setup)
> + return;
> +#endif
> +
> arch_init_irq();
> +
> +#ifdef CONFIG_KGDB
> + if (!kgdb_early_setup)
> + kgdb_early_setup = 1;
> +#endif
> }
The kgdb_ealy_setup check should be at beginning of init_IRQ (before
set_irq_noprobe loop)?
---
Atsushi Nemoto
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 2/3] kgdb, mips: add arch support for the kernel's kgdb core
2008-07-18 17:31 ` [PATCH 2/3] kgdb, mips: add arch support for the kernel's kgdb core Atsushi Nemoto
@ 2008-07-18 17:50 ` Jason Wessel
0 siblings, 0 replies; 12+ messages in thread
From: Jason Wessel @ 2008-07-18 17:50 UTC (permalink / raw)
To: Atsushi Nemoto; +Cc: linux-kernel, ralf, linux-mips
Atsushi Nemoto wrote:
>
> The kgdb_ealy_setup check should be at beginning of init_IRQ (before
> set_irq_noprobe loop)?
I would agree, and it looks like the following now in the patch.
I will revalidate with the HW to ensure there is no regression. :-)
Jason.
@@ -130,8 +135,18 @@ void __init init_IRQ(void)
{
int i;
+#ifdef CONFIG_KGDB
+ if (kgdb_early_setup)
+ return;
+#endif
+
for (i = 0; i < NR_IRQS; i++)
set_irq_noprobe(i);
arch_init_irq();
+
+#ifdef CONFIG_KGDB
+ if (!kgdb_early_setup)
+ kgdb_early_setup = 1;
+#endif
}
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 2/3] kgdb, mips: add arch support for the kernel's kgdb core
2008-07-18 17:08 ` [PATCH 2/3] kgdb, mips: add arch support for the kernel's kgdb core Jason Wessel
2008-07-18 17:08 ` [PATCH 3/3] kgdb, mips: pad pt_regs on MIPS64 for function arguments in an exception Jason Wessel
2008-07-18 17:31 ` [PATCH 2/3] kgdb, mips: add arch support for the kernel's kgdb core Atsushi Nemoto
@ 2008-07-24 16:27 ` Atsushi Nemoto
2008-07-25 3:00 ` Jason Wessel
2 siblings, 1 reply; 12+ messages in thread
From: Atsushi Nemoto @ 2008-07-24 16:27 UTC (permalink / raw)
To: jason.wessel; +Cc: linux-kernel, ralf, linux-mips
On Fri, 18 Jul 2008 12:08:47 -0500, Jason Wessel <jason.wessel@windriver.com> wrote:
> diff --git a/include/asm-mips/kgdb.h b/include/asm-mips/kgdb.h
...
> +static inline void arch_kgdb_breakpoint(void)
> +{
> + __asm__ __volatile__(
> + ".globl breakinst\n\t"
> + ".set\tnoreorder\n\t"
> + "nop\n"
> + "breakinst:\tbreak\n\t"
> + "nop\n\t"
> + ".set\treorder");
> +}
The gcc might inline kgdb_breakpoint() which includes
arch_kgdb_breakpoint(). I got this error with gcc 4.3.1:
CC kernel/kgdb.o
{standard input}: Assembler messages:
{standard input}:809: Error: symbol `breakinst' is already defined
{standard input}:913: Error: symbol `breakinst' is already defined
{standard input}:1233: Error: symbol `breakinst' is already defined
Moving arch_kgdb_breakpoint() into arch/mips/kernel/kgdb.c should
solve the problem.
---
Atsushi Nemoto
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 2/3] kgdb, mips: add arch support for the kernel's kgdb core
2008-07-24 16:27 ` Atsushi Nemoto
@ 2008-07-25 3:00 ` Jason Wessel
2008-07-25 14:52 ` Atsushi Nemoto
0 siblings, 1 reply; 12+ messages in thread
From: Jason Wessel @ 2008-07-25 3:00 UTC (permalink / raw)
To: Atsushi Nemoto; +Cc: linux-kernel, ralf, linux-mips
[-- Attachment #1: Type: text/plain, Size: 1032 bytes --]
Atsushi Nemoto wrote:
> On Fri, 18 Jul 2008 12:08:47 -0500, Jason Wessel <jason.wessel@windriver.com> wrote:
>> diff --git a/include/asm-mips/kgdb.h b/include/asm-mips/kgdb.h
> ...
>> +static inline void arch_kgdb_breakpoint(void)
>> +{
>> + __asm__ __volatile__(
>> + ".globl breakinst\n\t"
>> + ".set\tnoreorder\n\t"
>> + "nop\n"
>> + "breakinst:\tbreak\n\t"
>> + "nop\n\t"
>> + ".set\treorder");
>> +}
>
> The gcc might inline kgdb_breakpoint() which includes
> arch_kgdb_breakpoint(). I got this error with gcc 4.3.1:
>
> CC kernel/kgdb.o
> {standard input}: Assembler messages:
> {standard input}:809: Error: symbol `breakinst' is already defined
> {standard input}:913: Error: symbol `breakinst' is already defined
> {standard input}:1233: Error: symbol `breakinst' is already defined
>
> Moving arch_kgdb_breakpoint() into arch/mips/kernel/kgdb.c should
> solve the problem.
>
> ---
> Atsushi Nemoto
It seem ok to me to try it. Here is version 3 of the patch, which I was going to send to Ralf.
Jason.
[-- Attachment #2: mips-lite.patch --]
[-- Type: text/x-diff, Size: 12931 bytes --]
From: Jason Wessel <jason.wessel@windriver.com>
CC: ralf@linux-mips.org
Subject: [PATCH] kgdb, mips: add arch support for the kernel's kgdb core
The new kgdb architecture specific handler registers and unregisters
dynamically for exceptions depending on when you configure a kgdb I/O
driver.
Aside from initializing the exceptions earlier in the boot process,
kgdb should have no impact on a device when it is compiled in so long
as an I/O module is not configured for use.
There have been quite a number of contributors during the existence of
this patch (see arch/mips/kernel/kgdb.c). Most recently Jason
re-wrote the mips kgdb logic to use the die notification handlers.
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
---
arch/mips/Kconfig | 1
arch/mips/kernel/Makefile | 1
arch/mips/kernel/irq.c | 15 ++
arch/mips/kernel/kgdb.c | 285 ++++++++++++++++++++++++++++++++++++++++++++++
arch/mips/kernel/traps.c | 21 +++
include/asm-mips/kdebug.h | 14 ++
include/asm-mips/kgdb.h | 44 +++++++
7 files changed, 380 insertions(+), 1 deletion(-)
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -71,6 +71,7 @@ obj-$(CONFIG_MIPS32_COMPAT) += linux32.o
obj-$(CONFIG_MIPS32_N32) += binfmt_elfn32.o scall64-n32.o signal_n32.o
obj-$(CONFIG_MIPS32_O32) += binfmt_elfo32.o scall64-o32.o
+obj-$(CONFIG_KGDB) += kgdb.o
obj-$(CONFIG_PROC_FS) += proc.o
obj-$(CONFIG_64BIT) += cpu-bugs64.o
--- a/arch/mips/kernel/irq.c
+++ b/arch/mips/kernel/irq.c
@@ -21,11 +21,16 @@
#include <linux/sched.h>
#include <linux/seq_file.h>
#include <linux/kallsyms.h>
+#include <linux/kgdb.h>
#include <asm/atomic.h>
#include <asm/system.h>
#include <asm/uaccess.h>
+#ifdef CONFIG_KGDB
+int kgdb_early_setup;
+#endif
+
static unsigned long irq_map[NR_IRQS / BITS_PER_LONG];
int allocate_irqno(void)
@@ -130,8 +135,18 @@ void __init init_IRQ(void)
{
int i;
+#ifdef CONFIG_KGDB
+ if (kgdb_early_setup)
+ return;
+#endif
+
for (i = 0; i < NR_IRQS; i++)
set_irq_noprobe(i);
arch_init_irq();
+
+#ifdef CONFIG_KGDB
+ if (!kgdb_early_setup)
+ kgdb_early_setup = 1;
+#endif
}
--- /dev/null
+++ b/arch/mips/kernel/kgdb.c
@@ -0,0 +1,285 @@
+/*
+ * arch/mips/kernel/kgdb.c
+ *
+ * Originally written by Glenn Engel, Lake Stevens Instrument Division
+ *
+ * Contributed by HP Systems
+ *
+ * Modified for Linux/MIPS (and MIPS in general) by Andreas Busse
+ * Send complaints, suggestions etc. to <andy@waldorf-gmbh.de>
+ *
+ * Copyright (C) 1995 Andreas Busse
+ *
+ * Copyright (C) 2003 MontaVista Software Inc.
+ * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
+ *
+ * Copyright (C) 2004-2005 MontaVista Software Inc.
+ * Author: Manish Lachwani, mlachwani@mvista.com or manish@koffee-break.com
+ *
+ * Copyright (C) 2007-2008 Wind River Systems, Inc.
+ * Author/Maintainer: Jason Wessel, jason.wessel@windriver.com
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/ptrace.h> /* for linux pt_regs struct */
+#include <linux/kgdb.h>
+#include <linux/kdebug.h>
+#include <linux/sched.h>
+#include <asm/fpu.h>
+#include <asm/cacheflush.h>
+#include <asm/processor.h>
+#include <asm/sigcontext.h>
+
+static struct hard_trap_info {
+ unsigned char tt; /* Trap type code for MIPS R3xxx and R4xxx */
+ unsigned char signo; /* Signal that we map this trap into */
+} hard_trap_info[] = {
+ { 6, SIGBUS }, /* instruction bus error */
+ { 7, SIGBUS }, /* data bus error */
+ { 9, SIGTRAP }, /* break */
+/* { 11, SIGILL }, */ /* CPU unusable */
+ { 12, SIGFPE }, /* overflow */
+ { 13, SIGTRAP }, /* trap */
+ { 14, SIGSEGV }, /* virtual instruction cache coherency */
+ { 15, SIGFPE }, /* floating point exception */
+ { 23, SIGSEGV }, /* watch */
+ { 31, SIGSEGV }, /* virtual data cache coherency */
+ { 0, 0} /* Must be last */
+};
+
+void arch_kgdb_breakpoint(void)
+{
+ __asm__ __volatile__(
+ ".globl breakinst\n\t"
+ ".set\tnoreorder\n\t"
+ "nop\n"
+ "breakinst:\tbreak\n\t"
+ "nop\n\t"
+ ".set\treorder");
+}
+
+static void kgdb_call_nmi_hook(void *ignored)
+{
+ kgdb_nmicallback(raw_smp_processor_id(), (void *)0);
+}
+
+void kgdb_roundup_cpus(unsigned long flags)
+{
+ local_irq_enable();
+ smp_call_function(kgdb_call_nmi_hook, NULL, NULL);
+ local_irq_disable();
+}
+
+static int compute_signal(int tt)
+{
+ struct hard_trap_info *ht;
+
+ for (ht = hard_trap_info; ht->tt && ht->signo; ht++)
+ if (ht->tt == tt)
+ return ht->signo;
+
+ return SIGHUP; /* default for things we don't know about */
+}
+
+void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+ int reg;
+
+#if (KGDB_GDB_REG_SIZE == 32)
+ u32 *ptr = (u32 *)gdb_regs;
+#else
+ u64 *ptr = (u64 *)gdb_regs;
+#endif
+
+ for (reg = 0; reg < 32; reg++)
+ *(ptr++) = regs->regs[reg];
+
+ *(ptr++) = regs->cp0_status;
+ *(ptr++) = regs->lo;
+ *(ptr++) = regs->hi;
+ *(ptr++) = regs->cp0_badvaddr;
+ *(ptr++) = regs->cp0_cause;
+ *(ptr++) = regs->cp0_epc;
+
+ /* FP REGS */
+ if (!(current && (regs->cp0_status & ST0_CU1)))
+ return;
+
+ save_fp(current);
+ for (reg = 0; reg < 32; reg++)
+ *(ptr++) = current->thread.fpu.fpr[reg];
+
+ return;
+}
+
+void gdb_regs_to_pt_regs(unsigned long *gdb_regs, struct pt_regs *regs)
+{
+ int reg;
+
+#if (KGDB_GDB_REG_SIZE == 32)
+ const u32 *ptr = (u32 *)gdb_regs;
+#else
+ const u64 *ptr = (u64 *)gdb_regs;
+#endif
+
+ for (reg = 0; reg < 32; reg++)
+ regs->regs[reg] = *(ptr++);
+
+ regs->cp0_status = *(ptr++);
+ regs->lo = *(ptr++);
+ regs->hi = *(ptr++);
+ regs->cp0_badvaddr = *(ptr++);
+ regs->cp0_cause = *(ptr++);
+ regs->cp0_epc = *(ptr++);
+
+ /* FP REGS from current */
+ if (!(current && (regs->cp0_status & ST0_CU1)))
+ return;
+
+ for (reg = 0; reg < 32; reg++)
+ current->thread.fpu.fpr[reg] = *(ptr++);
+ restore_fp(current);
+
+ return;
+}
+
+/*
+ * Similar to regs_to_gdb_regs() except that process is sleeping and so
+ * we may not be able to get all the info.
+ */
+void sleeping_thread_to_gdb_regs(unsigned long *gdb_regs, struct task_struct *p)
+{
+ int reg;
+ struct thread_info *ti = task_thread_info(p);
+ unsigned long ksp = (unsigned long)ti + THREAD_SIZE - 32;
+ struct pt_regs *regs = (struct pt_regs *)ksp - 1;
+#if (KGDB_GDB_REG_SIZE == 32)
+ u32 *ptr = (u32 *)gdb_regs;
+#else
+ u64 *ptr = (u64 *)gdb_regs;
+#endif
+
+ for (reg = 0; reg < 16; reg++)
+ *(ptr++) = regs->regs[reg];
+
+ /* S0 - S7 */
+ for (reg = 16; reg < 24; reg++)
+ *(ptr++) = regs->regs[reg];
+
+ for (reg = 24; reg < 28; reg++)
+ *(ptr++) = 0;
+
+ /* GP, SP, FP, RA */
+ for (reg = 28; reg < 32; reg++)
+ *(ptr++) = regs->regs[reg];
+
+ *(ptr++) = regs->cp0_status;
+ *(ptr++) = regs->lo;
+ *(ptr++) = regs->hi;
+ *(ptr++) = regs->cp0_badvaddr;
+ *(ptr++) = regs->cp0_cause;
+ *(ptr++) = regs->cp0_epc;
+
+ return;
+}
+
+/*
+ * Calls linux_debug_hook before the kernel dies. If KGDB is enabled,
+ * then try to fall into the debugger
+ */
+static int kgdb_mips_notify(struct notifier_block *self, unsigned long cmd,
+ void *ptr)
+{
+ struct die_args *args = (struct die_args *)ptr;
+ struct pt_regs *regs = args->regs;
+ int trap = (regs->cp0_cause & 0x7c) >> 2;
+
+ if (fixup_exception(regs))
+ return NOTIFY_DONE;
+
+ /* Userpace events, ignore. */
+ if (user_mode(regs))
+ return NOTIFY_DONE;
+
+ if (atomic_read(&kgdb_active) != -1)
+ kgdb_nmicallback(smp_processor_id(), regs);
+
+ if (kgdb_handle_exception(trap, compute_signal(trap), 0, regs))
+ return NOTIFY_DONE;
+
+ if (atomic_read(&kgdb_setting_breakpoint))
+ if ((trap == 9) && (regs->cp0_epc == (unsigned long)breakinst))
+ regs->cp0_epc += 4;
+
+ /* In SMP mode, __flush_cache_all does IPI */
+ local_irq_enable();
+ __flush_cache_all();
+
+ return NOTIFY_STOP;
+}
+
+static struct notifier_block kgdb_notifier = {
+ .notifier_call = kgdb_mips_notify,
+};
+
+/*
+ * Handle the 's' and 'c' commands
+ */
+int kgdb_arch_handle_exception(int vector, int signo, int err_code,
+ char *remcom_in_buffer, char *remcom_out_buffer,
+ struct pt_regs *regs)
+{
+ char *ptr;
+ unsigned long address;
+ int cpu = smp_processor_id();
+
+ switch (remcom_in_buffer[0]) {
+ case 's':
+ case 'c':
+ /* handle the optional parameter */
+ ptr = &remcom_in_buffer[1];
+ if (kgdb_hex2long(&ptr, &address))
+ regs->cp0_epc = address;
+
+ atomic_set(&kgdb_cpu_doing_single_step, -1);
+ if (remcom_in_buffer[0] == 's')
+ if (kgdb_contthread)
+ atomic_set(&kgdb_cpu_doing_single_step, cpu);
+
+ return 0;
+ }
+
+ return -1;
+}
+
+struct kgdb_arch arch_kgdb_ops = {
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+ .gdb_bpt_instr = {0xd},
+#else /* ! CONFIG_CPU_LITTLE_ENDIAN */
+ .gdb_bpt_instr = {0x00, 0x00, 0x00, 0x0d},
+#endif
+};
+
+/*
+ * We use kgdb_early_setup so that functions we need to call now don't
+ * cause trouble when called again later.
+ */
+int kgdb_arch_init(void)
+{
+ register_die_notifier(&kgdb_notifier);
+ return 0;
+}
+
+/**
+ * kgdb_arch_exit - Perform any architecture specific uninitalization.
+ *
+ * This function will handle the uninitalization of any architecture
+ * specific callbacks, for dynamic registration and unregistration.
+ */
+void kgdb_arch_exit(void)
+{
+ unregister_die_notifier(&kgdb_notifier);
+}
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -23,6 +23,8 @@
#include <linux/bootmem.h>
#include <linux/interrupt.h>
#include <linux/ptrace.h>
+#include <linux/kgdb.h>
+#include <linux/kdebug.h>
#include <asm/bootinfo.h>
#include <asm/branch.h>
@@ -425,6 +427,10 @@ asmlinkage void do_be(struct pt_regs *re
printk(KERN_ALERT "%s bus error, epc == %0*lx, ra == %0*lx\n",
data ? "Data" : "Instruction",
field, regs->cp0_epc, field, regs->regs[31]);
+ if (notify_die(DIE_OOPS, "bus error", regs, SIGBUS, 0, 0)
+ == NOTIFY_STOP)
+ return;
+
die_if_kernel("Oops", regs);
force_sig(SIGBUS, current);
}
@@ -623,6 +629,9 @@ asmlinkage void do_fpe(struct pt_regs *r
{
siginfo_t info;
+ if (notify_die(DIE_FP, "FP exception", regs, SIGFPE, 0, 0)
+ == NOTIFY_STOP)
+ return;
die_if_kernel("FP exception in kernel code", regs);
if (fcr31 & FPU_CSR_UNI_X) {
@@ -682,6 +691,9 @@ static void do_trap_or_bp(struct pt_regs
siginfo_t info;
char b[40];
+ if (notify_die(DIE_TRAP, str, regs, code, 0, 0) == NOTIFY_STOP)
+ return;
+
/*
* A short test says that IRIX 5.3 sends SIGTRAP for all trap
* insns, even for trap and break codes that indicate arithmetic
@@ -762,6 +774,10 @@ asmlinkage void do_ri(struct pt_regs *re
unsigned int opcode = 0;
int status = -1;
+ if (notify_die(DIE_RI, "RI Fault", regs, SIGSEGV, 0, 0)
+ == NOTIFY_STOP)
+ return;
+
die_if_kernel("Reserved instruction in kernel code", regs);
if (unlikely(compute_return_epc(regs) < 0))
@@ -1537,6 +1553,11 @@ void __init trap_init(void)
extern char except_vec4;
unsigned long i;
+#if defined(CONFIG_KGDB)
+ if (kgdb_early_setup)
+ return; /* Already done */
+#endif
+
if (cpu_has_veic || cpu_has_vint)
ebase = (unsigned long) alloc_bootmem_low_pages(0x200 + VECTORSPACING*64);
else
--- /dev/null
+++ b/include/asm-mips/kgdb.h
@@ -0,0 +1,44 @@
+#ifdef __KERNEL__
+#ifndef _ASM_KGDB_H_
+#define _ASM_KGDB_H_
+
+#include <asm/sgidefs.h>
+
+#ifndef __ASSEMBLY__
+#if (_MIPS_ISA == _MIPS_ISA_MIPS1) || (_MIPS_ISA == _MIPS_ISA_MIPS2) || \
+ (_MIPS_ISA == _MIPS_ISA_MIPS32)
+
+#define KGDB_GDB_REG_SIZE 32
+
+#elif (_MIPS_ISA == _MIPS_ISA_MIPS3) || (_MIPS_ISA == _MIPS_ISA_MIPS4) || \
+ (_MIPS_ISA == _MIPS_ISA_MIPS64)
+
+#ifdef CONFIG_32BIT
+#define KGDB_GDB_REG_SIZE 32
+#else /* CONFIG_CPU_32BIT */
+#define KGDB_GDB_REG_SIZE 64
+#endif
+#else
+#error "Need to set KGDB_GDB_REG_SIZE for MIPS ISA"
+#endif /* _MIPS_ISA */
+
+#define BUFMAX 2048
+#if (KGDB_GDB_REG_SIZE == 32)
+#define NUMREGBYTES (90*sizeof(u32))
+#define NUMCRITREGBYTES (12*sizeof(u32))
+#else
+#define NUMREGBYTES (90*sizeof(u64))
+#define NUMCRITREGBYTES (12*sizeof(u64))
+#endif
+#define BREAK_INSTR_SIZE 4
+#define CACHE_FLUSH_IS_SAFE 0
+
+extern void arch_kgdb_breakpoint(void);
+extern int kgdb_early_setup;
+extern void *saved_vectors[32];
+extern void handle_exception(struct pt_regs *regs);
+extern void breakinst(void);
+
+#endif /* !__ASSEMBLY__ */
+#endif /* _ASM_KGDB_H_ */
+#endif /* __KERNEL__ */
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -3,6 +3,7 @@ config MIPS
default y
select HAVE_IDE
select HAVE_OPROFILE
+ select HAVE_ARCH_KGDB
# Horrible source of confusion. Die, die, die ...
select EMBEDDED
select RTC_LIB
--- a/include/asm-mips/kdebug.h
+++ b/include/asm-mips/kdebug.h
@@ -1 +1,13 @@
-#include <asm-generic/kdebug.h>
+#ifndef _ASM_MIPS_KDEBUG_H
+#define _ASM_MIPS_KDEBUG_H
+
+#include <linux/notifier.h>
+
+enum die_val {
+ DIE_OOPS = 1,
+ DIE_FP,
+ DIE_TRAP,
+ DIE_RI,
+};
+
+#endif /* _ASM_MIPS_KDEBUG_H */
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 2/3] kgdb, mips: add arch support for the kernel's kgdb core
2008-07-25 3:00 ` Jason Wessel
@ 2008-07-25 14:52 ` Atsushi Nemoto
2008-07-28 14:05 ` Atsushi Nemoto
0 siblings, 1 reply; 12+ messages in thread
From: Atsushi Nemoto @ 2008-07-25 14:52 UTC (permalink / raw)
To: jason.wessel; +Cc: linux-kernel, ralf, linux-mips
On Thu, 24 Jul 2008 22:00:21 -0500, Jason Wessel <jason.wessel@windriver.com> wrote:
> It seem ok to me to try it. Here is version 3 of the patch, which I was going to send to Ralf.
Thanks, it works for me with serial_txx9 kgdboc module.
---
Atsushi Nemoto
^ permalink raw reply [flat|nested] 12+ messages in thread
* Re: [PATCH 2/3] kgdb, mips: add arch support for the kernel's kgdb core
2008-07-25 14:52 ` Atsushi Nemoto
@ 2008-07-28 14:05 ` Atsushi Nemoto
2008-07-28 18:50 ` Jason Wessel
0 siblings, 1 reply; 12+ messages in thread
From: Atsushi Nemoto @ 2008-07-28 14:05 UTC (permalink / raw)
To: jason.wessel; +Cc: linux-kernel, ralf, linux-mips
On Fri, 25 Jul 2008 23:52:33 +0900 (JST), Atsushi Nemoto <anemo@mba.ocn.ne.jp> wrote:
> > It seem ok to me to try it. Here is version 3 of the patch, which I was going to send to Ralf.
>
> Thanks, it works for me with serial_txx9 kgdboc module.
BTW, is FRAME_POINTER mandatory for kgdb? I agree that FRAME_POINTER
(ie. -fno-omit-frame-pointer -fno-optimize-sibling-calls) helps source
level debugging, but I think transparency is more important.
Now kgdboc can be loaded/activated at run-time, so I want to enable
CONFIG_KGDB usually. But CONFIG_FRAME_POINTER introduces runtime
overhead on overall kernel, which is too bad (at least on MIPS).
Also, selecting FRAME_POINTER (which is not selectable on MIPS)
unconditionally looks somewhat inconsistent.
So ... Is this patch reasonable?
Subject: kgdb: Do not select FRAME_POINTER on MIPS
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
---
diff --git a/lib/Kconfig.kgdb b/lib/Kconfig.kgdb
index a5d4b1d..cc61bf0 100644
--- a/lib/Kconfig.kgdb
+++ b/lib/Kconfig.kgdb
@@ -7,7 +7,7 @@ config HAVE_ARCH_KGDB
menuconfig KGDB
bool "KGDB: kernel debugging with remote gdb"
- select FRAME_POINTER
+ select FRAME_POINTER if !MIPS
depends on HAVE_ARCH_KGDB
depends on DEBUG_KERNEL && EXPERIMENTAL
help
^ permalink raw reply related [flat|nested] 12+ messages in thread
* Re: [PATCH 2/3] kgdb, mips: add arch support for the kernel's kgdb core
2008-07-28 14:05 ` Atsushi Nemoto
@ 2008-07-28 18:50 ` Jason Wessel
2008-07-29 1:24 ` Atsushi Nemoto
0 siblings, 1 reply; 12+ messages in thread
From: Jason Wessel @ 2008-07-28 18:50 UTC (permalink / raw)
To: Atsushi Nemoto; +Cc: linux-kernel, ralf, linux-mips
Atsushi Nemoto wrote:
> On Fri, 25 Jul 2008 23:52:33 +0900 (JST), Atsushi Nemoto <anemo@mba.ocn.ne.jp> wrote:
>>> It seem ok to me to try it. Here is version 3 of the patch, which I was going to send to Ralf.
>> Thanks, it works for me with serial_txx9 kgdboc module.
>
> BTW, is FRAME_POINTER mandatory for kgdb? I agree that FRAME_POINTER
> (ie. -fno-omit-frame-pointer -fno-optimize-sibling-calls) helps source
> level debugging, but I think transparency is more important.
>
> Now kgdboc can be loaded/activated at run-time, so I want to enable
> CONFIG_KGDB usually. But CONFIG_FRAME_POINTER introduces runtime
> overhead on overall kernel, which is too bad (at least on MIPS).
>
> Also, selecting FRAME_POINTER (which is not selectable on MIPS)
> unconditionally looks somewhat inconsistent.
>
> So ... Is this patch reasonable?
>
Sure the patch is reasonable for MIPS, but I think it is worth going a
step further.
There is no technical reason that frame pointers are required for KGDB
in the present mainline sources. This does allow for further
traceability but it is certainly not a requirement for the use of kgdb.
If all you want to do is look at frame 0 and inspect memory or set a
breakpoint and look at some structures kgdb will certainly serve your
purpose.
I'll consider this a defect to the kgdb core and update the
documentation to reflect that it is advised to use frame pointers, but
not a requirement.
Jason.
>From 329f5bb0071eb2a56f2bcf79838ba91784c8b54d Mon Sep 17 00:00:00 2001
From: Jason Wessel <jason.wessel@windriver.com>
Date: Mon, 28 Jul 2008 13:48:31 -0500
Subject: [PATCH] kgdb: remove the requirement for CONFIG_FRAME_POINTER
There is no technical reason that the kgdb core requires frame
pointers. It is up to the end user of KGDB to decide if they need
them or not.
[ anemo@mba.ocn.ne.jp: removed frame pointers on mips ]
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
---
Documentation/DocBook/kgdb.tmpl | 8 ++++++++
lib/Kconfig.kgdb | 11 +++++++----
2 files changed, 15 insertions(+), 4 deletions(-)
diff --git a/Documentation/DocBook/kgdb.tmpl b/Documentation/DocBook/kgdb.tmpl
index e8acd1f..54d3b15 100644
--- a/Documentation/DocBook/kgdb.tmpl
+++ b/Documentation/DocBook/kgdb.tmpl
@@ -98,6 +98,14 @@
"Kernel debugging" select "KGDB: kernel debugging with remote gdb".
</para>
<para>
+ It is advised, but not required that you turn on the
+ CONFIG_FRAME_POINTER kernel option. This option inserts code to
+ into the compiled executable which saves the frame information in
+ registers or on the stack at different points which will allow a
+ debugger such as gdb to more accurately construct stack back traces
+ while debugging the kernel.
+ </para>
+ <para>
Next you should choose one of more I/O drivers to interconnect debugging
host and debugged target. Early boot debugging requires a KGDB
I/O driver that supports early debugging and the driver must be
diff --git a/lib/Kconfig.kgdb b/lib/Kconfig.kgdb
index 2cfd272..9b5d1d7 100644
--- a/lib/Kconfig.kgdb
+++ b/lib/Kconfig.kgdb
@@ -4,14 +4,17 @@ config HAVE_ARCH_KGDB
menuconfig KGDB
bool "KGDB: kernel debugging with remote gdb"
- select FRAME_POINTER
depends on HAVE_ARCH_KGDB
depends on DEBUG_KERNEL && EXPERIMENTAL
help
If you say Y here, it will be possible to remotely debug the
- kernel using gdb. Documentation of kernel debugger is available
- at http://kgdb.sourceforge.net as well as in DocBook form
- in Documentation/DocBook/. If unsure, say N.
+ kernel using gdb. It is recommended but not required, that
+ you also turn on the kernel config option
+ CONFIG_FRAME_POINTER to aid in producing more reliable stack
+ backtraces in the external debugger. Documentation of
+ kernel debugger is available at http://kgdb.sourceforge.net
+ as well as in DocBook form in Documentation/DocBook/. If
+ unsure, say N.
if KGDB
--
1.5.5.1
^ permalink raw reply related [flat|nested] 12+ messages in thread
* Re: [PATCH 2/3] kgdb, mips: add arch support for the kernel's kgdb core
2008-07-28 18:50 ` Jason Wessel
@ 2008-07-29 1:24 ` Atsushi Nemoto
0 siblings, 0 replies; 12+ messages in thread
From: Atsushi Nemoto @ 2008-07-29 1:24 UTC (permalink / raw)
To: jason.wessel; +Cc: linux-kernel, ralf, linux-mips
On Mon, 28 Jul 2008 13:50:55 -0500, Jason Wessel <jason.wessel@windriver.com> wrote:
> There is no technical reason that frame pointers are required for KGDB
> in the present mainline sources. This does allow for further
> traceability but it is certainly not a requirement for the use of kgdb.
> If all you want to do is look at frame 0 and inspect memory or set a
> breakpoint and look at some structures kgdb will certainly serve your
> purpose.
Yes. On MIPS, I can even show backtrace without FRAME_POINTER (if I
enabled DEBUG_INFO).
> I'll consider this a defect to the kgdb core and update the
> documentation to reflect that it is advised to use frame pointers, but
> not a requirement.
Thanks, your patch is fine for me.
---
Atsushi Nemoto
^ permalink raw reply [flat|nested] 12+ messages in thread
end of thread, other threads:[~2008-07-29 1:24 UTC | newest]
Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2008-07-18 17:08 [PATCH 0/3] kgdb 2.6.27 mips Jason Wessel
2008-07-18 17:08 ` [PATCH 1/3] kgdb, mips: Remove existing kgdb implementation Jason Wessel
2008-07-18 17:08 ` [PATCH 2/3] kgdb, mips: add arch support for the kernel's kgdb core Jason Wessel
2008-07-18 17:08 ` [PATCH 3/3] kgdb, mips: pad pt_regs on MIPS64 for function arguments in an exception Jason Wessel
2008-07-18 17:31 ` [PATCH 2/3] kgdb, mips: add arch support for the kernel's kgdb core Atsushi Nemoto
2008-07-18 17:50 ` Jason Wessel
2008-07-24 16:27 ` Atsushi Nemoto
2008-07-25 3:00 ` Jason Wessel
2008-07-25 14:52 ` Atsushi Nemoto
2008-07-28 14:05 ` Atsushi Nemoto
2008-07-28 18:50 ` Jason Wessel
2008-07-29 1:24 ` Atsushi Nemoto
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