* [PATCH 0/4] ppc64: Introduce BPA platform
@ 2005-04-28 7:54 Arnd Bergmann
2005-04-28 7:56 ` [PATCH 1/4] ppc64: add BPA platform type Arnd Bergmann
` (4 more replies)
0 siblings, 5 replies; 15+ messages in thread
From: Arnd Bergmann @ 2005-04-28 7:54 UTC (permalink / raw)
To: linuxppc64-dev, linux-kernel
Cc: Benjamin Herrenschmidt, Anton Blanchard, Paul Mackerras
This series of patches add support for a fifth platform type in the
ppc64 architecture tree. The Broadband Processor Architecture (BPA)
is currently used in a single machine from IBM, with others likely
to be added at a later point.
I already sent preparation patches before, these need to be applied
on top of them.
The first three patches add the actual platform code, which should
be usable for any BPA compatible implementation.
The final patch introduces a new file system to make use of the
SPUs inside the processors. This patch is still in a prototype stage
and not intended for merging yet.
Arnd <><
^ permalink raw reply [flat|nested] 15+ messages in thread
* [PATCH 1/4] ppc64: add BPA platform type
2005-04-28 7:54 [PATCH 0/4] ppc64: Introduce BPA platform Arnd Bergmann
@ 2005-04-28 7:56 ` Arnd Bergmann
2005-04-28 7:58 ` [PATCH 2/4] ppc64: Add driver for BPA interrupt controllers Arnd Bergmann
` (3 subsequent siblings)
4 siblings, 0 replies; 15+ messages in thread
From: Arnd Bergmann @ 2005-04-28 7:56 UTC (permalink / raw)
To: linuxppc64-dev
Cc: linux-kernel, Benjamin Herrenschmidt, Anton Blanchard, Paul Mackerras
This adds the basic support for running on BPA machines.
It should be possible to configure a kernel for any
combination of CONFIG_PPC_BPA with any of the other
multiplatform targets.
Signed-off-by: Arnd Bergmann <arndb@de.ibm.com>
Index: linus-2.5/MAINTAINERS
===================================================================
--- linus-2.5.orig/MAINTAINERS 2005-04-22 06:57:27.000000000 +0200
+++ linus-2.5/MAINTAINERS 2005-04-22 06:57:59.000000000 +0200
@@ -493,6 +493,13 @@
W: http://sourceforge.net/projects/bonding/
S: Supported
+BROADBAND PROCESSOR ARCHITECTURE
+P: Arnd Bergmann
+M: arnd@arndb.de
+L: linuxppc64-dev@ozlabs.org
+W: http://linuxppc64.org
+S: Supported
+
BTTV VIDEO4LINUX DRIVER
P: Gerd Knorr
M: kraxel@bytesex.org
Index: linus-2.5/arch/ppc64/Kconfig
===================================================================
--- linus-2.5.orig/arch/ppc64/Kconfig 2005-04-22 06:57:28.000000000 +0200
+++ linus-2.5/arch/ppc64/Kconfig 2005-04-22 06:58:22.000000000 +0200
@@ -73,6 +73,10 @@
bool " IBM pSeries & new iSeries"
default y
+config PPC_BPA
+ bool " Broadband Processor Architecture"
+ depends on PPC_MULTIPLATFORM
+
config PPC_PMAC
depends on PPC_MULTIPLATFORM
bool " Apple G5 based machines"
@@ -252,7 +256,7 @@
config PPC_RTAS
bool
- depends on PPC_PSERIES
+ depends on PPC_PSERIES || PPC_BPA
default y
config RTAS_PROC
Index: linus-2.5/arch/ppc64/Makefile
===================================================================
--- linus-2.5.orig/arch/ppc64/Makefile 2005-04-22 06:52:24.000000000 +0200
+++ linus-2.5/arch/ppc64/Makefile 2005-04-22 06:57:59.000000000 +0200
@@ -83,12 +83,14 @@
boottarget-$(CONFIG_PPC_PSERIES) := zImage zImage.initrd
boottarget-$(CONFIG_PPC_MAPLE) := zImage zImage.initrd
boottarget-$(CONFIG_PPC_ISERIES) := vmlinux.sminitrd vmlinux.initrd vmlinux.sm
+boottarget-$(CONFIG_PPC_BPA) := zImage zImage.initrd
$(boottarget-y): vmlinux
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
bootimage-$(CONFIG_PPC_PSERIES) := $(boot)/zImage
bootimage-$(CONFIG_PPC_PMAC) := vmlinux
bootimage-$(CONFIG_PPC_MAPLE) := $(boot)/zImage
+bootimage-$(CONFIG_PPC_BPA) := zImage
bootimage-$(CONFIG_PPC_ISERIES) := vmlinux
BOOTIMAGE := $(bootimage-y)
install: vmlinux
Index: linus-2.5/arch/ppc64/kernel/Makefile
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/Makefile 2005-04-22 06:57:31.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/Makefile 2005-04-22 06:59:10.000000000 +0200
@@ -34,6 +34,8 @@
pSeries_nvram.o rtasd.o ras.o pSeries_reconfig.o \
xics.o pSeries_setup.o pSeries_iommu.o
+obj-$(CONFIG_PPC_BPA) += bpa_setup.o bpa_nvram.o
+
obj-$(CONFIG_EEH) += eeh.o
obj-$(CONFIG_PROC_FS) += proc_ppc64.o
obj-$(CONFIG_RTAS_FLASH) += rtas_flash.o
@@ -60,6 +62,7 @@
obj-$(CONFIG_PPC_PMAC) += pmac_smp.o smp-tbsync.o
obj-$(CONFIG_PPC_ISERIES) += iSeries_smp.o
obj-$(CONFIG_PPC_PSERIES) += pSeries_smp.o
+obj-$(CONFIG_PPC_BPA) += pSeries_smp.o
obj-$(CONFIG_PPC_MAPLE) += smp-tbsync.o
endif
Index: linus-2.5/arch/ppc64/kernel/bpa_setup.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linus-2.5/arch/ppc64/kernel/bpa_setup.c 2005-04-22 06:58:22.000000000 +0200
@@ -0,0 +1,207 @@
+/*
+ * linux/arch/ppc/kernel/bpa_setup.c
+ *
+ * Copyright (C) 1995 Linus Torvalds
+ * Adapted from 'alpha' version by Gary Thomas
+ * Modified by Cort Dougan (cort@cs.nmt.edu)
+ * Modified by PPC64 Team, IBM Corp
+ * Modified by BPA Team, IBM Deutschland Entwicklung GmbH
+ *
+ * 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.
+ */
+#undef DEBUG
+
+#include <linux/config.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/stddef.h>
+#include <linux/unistd.h>
+#include <linux/slab.h>
+#include <linux/user.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/seq_file.h>
+#include <linux/root_dev.h>
+#include <linux/console.h>
+
+#include <asm/mmu.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/prom.h>
+#include <asm/rtas.h>
+#include <asm/pci-bridge.h>
+#include <asm/iommu.h>
+#include <asm/dma.h>
+#include <asm/machdep.h>
+#include <asm/time.h>
+#include <asm/nvram.h>
+#include <asm/cputable.h>
+
+#include "pci.h"
+
+#ifdef DEBUG
+#define DBG(fmt...) udbg_printf(fmt)
+#else
+#define DBG(fmt...)
+#endif
+
+extern void pSeries_get_boot_time(struct rtc_time *rtc_time);
+extern void pSeries_get_rtc_time(struct rtc_time *rtc_time);
+extern int pSeries_set_rtc_time(struct rtc_time *rtc_time);
+
+extern unsigned long ppc_proc_freq;
+extern unsigned long ppc_tb_freq;
+
+void bpa_get_cpuinfo(struct seq_file *m)
+{
+ struct device_node *root;
+ const char *model = "";
+
+ root = of_find_node_by_path("/");
+ if (root)
+ model = get_property(root, "model", NULL);
+ seq_printf(m, "machine\t\t: BPA %s\n", model);
+ of_node_put(root);
+}
+
+static void __init bpa_progress(char *s, unsigned short hex)
+{
+ printk("*** %04x : %s\n", hex, s ? s : "");
+}
+
+extern void setup_default_decr(void);
+
+/* Some sane defaults: 125 MHz timebase, 1GHz processor */
+#define DEFAULT_TB_FREQ 125000000UL
+#define DEFAULT_PROC_FREQ (DEFAULT_TB_FREQ * 8)
+
+/* FIXME: consolidate this into rtas.c or similar */
+static void __init pSeries_calibrate_decr(void)
+{
+ struct device_node *cpu;
+ struct div_result divres;
+ unsigned int *fp;
+ int node_found;
+
+ /*
+ * The cpu node should have a timebase-frequency property
+ * to tell us the rate at which the decrementer counts.
+ */
+ cpu = of_find_node_by_type(NULL, "cpu");
+
+ ppc_tb_freq = DEFAULT_TB_FREQ; /* hardcoded default */
+ node_found = 0;
+ if (cpu != 0) {
+ fp = (unsigned int *)get_property(cpu, "timebase-frequency",
+ NULL);
+ if (fp != 0) {
+ node_found = 1;
+ ppc_tb_freq = *fp;
+ }
+ }
+ if (!node_found)
+ printk(KERN_ERR "WARNING: Estimating decrementer frequency "
+ "(not found)\n");
+
+ ppc_proc_freq = DEFAULT_PROC_FREQ;
+ node_found = 0;
+ if (cpu != 0) {
+ fp = (unsigned int *)get_property(cpu, "clock-frequency",
+ NULL);
+ if (fp != 0) {
+ node_found = 1;
+ ppc_proc_freq = *fp;
+ }
+ }
+ if (!node_found)
+ printk(KERN_ERR "WARNING: Estimating processor frequency "
+ "(not found)\n");
+
+ of_node_put(cpu);
+
+ printk(KERN_INFO "time_init: decrementer frequency = %lu.%.6lu MHz\n",
+ ppc_tb_freq/1000000, ppc_tb_freq%1000000);
+ printk(KERN_INFO "time_init: processor frequency = %lu.%.6lu MHz\n",
+ ppc_proc_freq/1000000, ppc_proc_freq%1000000);
+
+ tb_ticks_per_jiffy = ppc_tb_freq / HZ;
+ tb_ticks_per_sec = tb_ticks_per_jiffy * HZ;
+ tb_ticks_per_usec = ppc_tb_freq / 1000000;
+ tb_to_us = mulhwu_scale_factor(ppc_tb_freq, 1000000);
+ div128_by_32(1024*1024, 0, tb_ticks_per_sec, &divres);
+ tb_to_xs = divres.result_low;
+
+ setup_default_decr();
+}
+
+static void __init bpa_setup_arch(void)
+{
+#ifdef CONFIG_SMP
+ smp_init_pSeries();
+#endif
+
+ /* init to some ~sane value until calibrate_delay() runs */
+ loops_per_jiffy = 50000000;
+
+ if (ROOT_DEV == 0) {
+ printk("No ramdisk, default root is /dev/hda2\n");
+ ROOT_DEV = Root_HDA2;
+ }
+
+ /* Find and initialize PCI host bridges */
+ init_pci_config_tokens();
+ find_and_init_phbs();
+
+#ifdef CONFIG_DUMMY_CONSOLE
+ conswitchp = &dummy_con;
+#endif
+
+ // bpa_nvram_init();
+}
+
+/*
+ * Early initialization. Relocation is on but do not reference unbolted pages
+ */
+static void __init bpa_init_early(void)
+{
+ DBG(" -> bpa_init_early()\n");
+
+ hpte_init_native();
+
+ pci_direct_iommu_init();
+
+ ppc64_interrupt_controller = IC_BPA_IIC;
+
+ DBG(" <- bpa_init_early()\n");
+}
+
+
+static int __init bpa_probe(int platform)
+{
+ if (platform != PLATFORM_BPA)
+ return 0;
+
+ return 1;
+}
+
+struct machdep_calls __initdata bpa_md = {
+ .probe = bpa_probe,
+ .setup_arch = bpa_setup_arch,
+ .init_early = bpa_init_early,
+ .get_cpuinfo = bpa_get_cpuinfo,
+ .restart = rtas_restart,
+ .power_off = rtas_power_off,
+ .halt = rtas_halt,
+ .get_boot_time = pSeries_get_boot_time,
+ .get_rtc_time = pSeries_get_rtc_time,
+ .set_rtc_time = pSeries_set_rtc_time,
+ .calibrate_decr = pSeries_calibrate_decr,
+ .progress = bpa_progress,
+};
Index: linus-2.5/arch/ppc64/kernel/cpu_setup_power4.S
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/cpu_setup_power4.S 2005-04-22 06:52:24.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/cpu_setup_power4.S 2005-04-22 06:57:59.000000000 +0200
@@ -73,7 +73,21 @@
_GLOBAL(__setup_cpu_power4)
blr
-
+
+_GLOBAL(__setup_cpu_be)
+ /* Set large page sizes LP=0: 16MB, LP=1: 64KB */
+ addi r3, 0, 0
+ ori r3, r3, HID6_LB
+ sldi r3, r3, 32
+ nor r3, r3, r3
+ mfspr r4, SPRN_HID6
+ and r4, r4, r3
+ addi r3, 0, 0x02000
+ sldi r3, r3, 32
+ or r4, r4, r3
+ mtspr SPRN_HID6, r4
+ blr
+
_GLOBAL(__setup_cpu_ppc970)
mfspr r0,SPRN_HID0
li r11,5 /* clear DOZE and SLEEP */
Index: linus-2.5/arch/ppc64/kernel/cputable.c
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/cputable.c 2005-04-22 06:52:24.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/cputable.c 2005-04-22 06:57:59.000000000 +0200
@@ -34,6 +34,7 @@
extern void __setup_cpu_power3(unsigned long offset, struct cpu_spec* spec);
extern void __setup_cpu_power4(unsigned long offset, struct cpu_spec* spec);
extern void __setup_cpu_ppc970(unsigned long offset, struct cpu_spec* spec);
+extern void __setup_cpu_be(unsigned long offset, struct cpu_spec* spec);
/* We only set the altivec features if the kernel was compiled with altivec
@@ -162,6 +163,16 @@
__setup_cpu_power4,
COMMON_PPC64_FW
},
+ { /* BE DD1.x */
+ 0xffff0000, 0x00700000, "Broadband Engine",
+ CPU_FTR_SPLIT_ID_CACHE | CPU_FTR_USE_TB | CPU_FTR_HPTE_TABLE |
+ CPU_FTR_PPCAS_ARCH_V2 | CPU_FTR_ALTIVEC_COMP |
+ CPU_FTR_SMT,
+ COMMON_USER_PPC64 | PPC_FEATURE_HAS_ALTIVEC_COMP,
+ 128, 128,
+ __setup_cpu_be,
+ COMMON_PPC64_FW
+ },
{ /* default match */
0x00000000, 0x00000000, "POWER4 (compatible)",
CPU_FTR_SPLIT_ID_CACHE | CPU_FTR_USE_TB | CPU_FTR_HPTE_TABLE |
Index: linus-2.5/arch/ppc64/kernel/irq.c
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/irq.c 2005-04-22 06:52:24.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/irq.c 2005-04-22 06:57:59.000000000 +0200
@@ -395,6 +395,9 @@
if (ppc64_interrupt_controller == IC_OPEN_PIC)
return real_irq; /* no mapping for openpic (for now) */
+ if (ppc64_interrupt_controller == IC_BPA_IIC)
+ return real_irq; /* no mapping for iic either */
+
/* don't map interrupts < MIN_VIRT_IRQ */
if (real_irq < MIN_VIRT_IRQ) {
virt_irq_to_real_map[real_irq] = real_irq;
Index: linus-2.5/arch/ppc64/kernel/proc_ppc64.c
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/proc_ppc64.c 2005-04-22 06:52:24.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/proc_ppc64.c 2005-04-22 06:57:59.000000000 +0200
@@ -53,7 +53,7 @@
if (!root)
return 1;
- if (!(systemcfg->platform & PLATFORM_PSERIES))
+ if (!(systemcfg->platform & (PLATFORM_PSERIES | PLATFORM_BPA)))
return 0;
if (!proc_mkdir("rtas", root))
Index: linus-2.5/arch/ppc64/kernel/prom_init.c
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/prom_init.c 2005-04-22 06:52:24.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/prom_init.c 2005-04-22 06:58:20.000000000 +0200
@@ -1731,9 +1731,9 @@
&getprop_rval, sizeof(getprop_rval));
/*
- * On pSeries, copy the CPU hold code
+ * On pSeries and BPA, copy the CPU hold code
*/
- if (RELOC(of_platform) & PLATFORM_PSERIES)
+ if (RELOC(of_platform) & (PLATFORM_PSERIES | PLATFORM_BPA))
copy_and_flush(0, KERNELBASE - offset, 0x100, 0);
/*
Index: linus-2.5/arch/ppc64/kernel/setup.c
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/setup.c 2005-04-22 06:52:24.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/setup.c 2005-04-22 06:57:59.000000000 +0200
@@ -348,6 +348,7 @@
extern struct machdep_calls pSeries_md;
extern struct machdep_calls pmac_md;
extern struct machdep_calls maple_md;
+extern struct machdep_calls bpa_md;
/* Ultimately, stuff them in an elf section like initcalls... */
static struct machdep_calls __initdata *machines[] = {
@@ -360,6 +361,9 @@
#ifdef CONFIG_PPC_MAPLE
&maple_md,
#endif /* CONFIG_PPC_MAPLE */
+#ifdef CONFIG_PPC_BPA
+ &bpa_md,
+#endif
NULL
};
Index: linus-2.5/arch/ppc64/kernel/traps.c
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/traps.c 2005-04-22 06:57:28.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/traps.c 2005-04-22 06:57:59.000000000 +0200
@@ -126,6 +126,10 @@
printk("POWERMAC ");
nl = 1;
break;
+ case PLATFORM_BPA:
+ printk("BPA ");
+ nl = 1;
+ break;
}
if (nl)
printk("\n");
Index: linus-2.5/include/asm-ppc64/mmu.h
===================================================================
--- linus-2.5.orig/include/asm-ppc64/mmu.h 2005-04-22 06:52:24.000000000 +0200
+++ linus-2.5/include/asm-ppc64/mmu.h 2005-04-22 06:57:59.000000000 +0200
@@ -196,6 +196,8 @@
#define SLB_VSID_N 0x0000000000000200 /* no-execute */
#define SLB_VSID_L 0x0000000000000100 /* largepage (4M) */
#define SLB_VSID_C 0x0000000000000080 /* class */
+#define SLB_VSID_LS 0x0000000000000070 /* LS if 1, then second
+ large page size */
#define SLB_VSID_KERNEL (SLB_VSID_KP|SLB_VSID_C)
#define SLB_VSID_USER (SLB_VSID_KP|SLB_VSID_KS)
Index: linus-2.5/include/asm-ppc64/processor.h
===================================================================
--- linus-2.5.orig/include/asm-ppc64/processor.h 2005-04-22 06:57:29.000000000 +0200
+++ linus-2.5/include/asm-ppc64/processor.h 2005-04-22 06:57:59.000000000 +0200
@@ -217,14 +217,22 @@
#define HID0_ABE (1<<3) /* Address Broadcast Enable */
#define HID0_BHTE (1<<2) /* Branch History Table Enable */
#define HID0_BTCD (1<<1) /* Branch target cache disable */
+#define SPRN_HID6 0x3F9 /* Hardware Implementation Register 6 */
+#define HID6_LB (0x0F<<12) /* Concurrent Large Page Modes */
+#define HID6_DLP (1<<20) /* Disable all large page modes (4K only) */
#define SPRN_MSRDORM 0x3F1 /* Hardware Implementation Register 1 */
#define SPRN_HID1 0x3F1 /* Hardware Implementation Register 1 */
#define SPRN_IABR 0x3F2 /* Instruction Address Breakpoint Register */
#define SPRN_NIADORM 0x3F3 /* Hardware Implementation Register 2 */
#define SPRN_HID4 0x3F4 /* 970 HID4 */
#define SPRN_HID5 0x3F6 /* 970 HID5 */
-#define SPRN_TSC 0x3FD /* Thread switch control */
-#define SPRN_TST 0x3FC /* Thread switch timeout */
+#define SPRN_TSCR 0x399 /* Thread switch control on BE */
+#define SPRN_TTR 0x39A /* Thread switch timeout on BE */
+#define TSCR_DEC_ENABLE 0x200000 /* Decrementer Interrupt */
+#define TSCR_EE_ENABLE 0x100000 /* External Interrupt */
+#define TSCR_EE_BOOST 0x080000 /* External Interrupt Boost */
+#define SPRN_TSC 0x3FD /* Thread switch control on others */
+#define SPRN_TST 0x3FC /* Thread switch timeout on others */
#define SPRN_IAC1 0x3F4 /* Instruction Address Compare 1 */
#define SPRN_IAC2 0x3F5 /* Instruction Address Compare 2 */
#define SPRN_ICCR 0x3FB /* Instruction Cache Cacheability Register */
@@ -411,8 +419,9 @@
#define PV_POWER5 0x003A
#define PV_POWER5p 0x003B
#define PV_970FX 0x003C
-#define PV_630 0x0040
-#define PV_630p 0x0041
+#define PV_630 0x0040
+#define PV_630p 0x0041
+#define PV_BE 0x0070
/* Platforms supported by PPC64 */
#define PLATFORM_PSERIES 0x0100
@@ -421,6 +430,7 @@
#define PLATFORM_LPAR 0x0001
#define PLATFORM_POWERMAC 0x0400
#define PLATFORM_MAPLE 0x0500
+#define PLATFORM_BPA 0x1000
/* Compatibility with drivers coming from PPC32 world */
#define _machine (systemcfg->platform)
@@ -432,6 +442,7 @@
#define IC_INVALID 0
#define IC_OPEN_PIC 1
#define IC_PPC_XIC 2
+#define IC_BPA_IIC 3
#define XGLUE(a,b) a##b
#define GLUE(a,b) XGLUE(a,b)
Index: linus-2.5/include/asm-ppc64/smp.h
===================================================================
--- linus-2.5.orig/include/asm-ppc64/smp.h 2005-04-22 06:52:24.000000000 +0200
+++ linus-2.5/include/asm-ppc64/smp.h 2005-04-22 06:58:20.000000000 +0200
@@ -85,6 +85,14 @@
extern struct smp_ops_t *smp_ops;
+#ifdef CONFIG_PPC_PSERIES
+void vpa_init(int cpu);
+#else
+static inline void vpa_init(int cpu)
+{
+}
+#endif /* CONFIG_PPC_PSERIES */
+
#endif /* __ASSEMBLY__ */
#endif /* !(_PPC64_SMP_H) */
^ permalink raw reply [flat|nested] 15+ messages in thread
* [PATCH 2/4] ppc64: Add driver for BPA interrupt controllers
2005-04-28 7:54 [PATCH 0/4] ppc64: Introduce BPA platform Arnd Bergmann
2005-04-28 7:56 ` [PATCH 1/4] ppc64: add BPA platform type Arnd Bergmann
@ 2005-04-28 7:58 ` Arnd Bergmann
2005-04-28 7:59 ` [PATCH 3/4] ppc64: Add driver for BPA iommu Arnd Bergmann
` (2 subsequent siblings)
4 siblings, 0 replies; 15+ messages in thread
From: Arnd Bergmann @ 2005-04-28 7:58 UTC (permalink / raw)
To: linuxppc64-dev
Cc: linux-kernel, Benjamin Herrenschmidt, Anton Blanchard, Paul Mackerras
Add support for the integrated interrupt controller on BPA
CPUs. There is one of those for each SMT thread.
The mapping of interrupt numbers to HW interrupt sources
is described in arch/ppc64/kernel/bpa_iic.h.
This version hardcodes the 'Spider' chip as the secondary
interrupt controller. That is not really generic for the
architecture, but at the moment it is the only secondary
PIC that exists.
A little more work will be needed on this as soon as
we have boards with multiple external interrupt controllers.
Signed-off-by: Arnd Bergmann <arndb@de.ibm.com>
Index: linus-2.5/arch/ppc64/Kconfig
===================================================================
--- linus-2.5.orig/arch/ppc64/Kconfig 2005-04-22 06:59:52.000000000 +0200
+++ linus-2.5/arch/ppc64/Kconfig 2005-04-22 06:59:58.000000000 +0200
@@ -106,6 +106,21 @@
bool
default y
+config XICS
+ depends on PPC_PSERIES
+ bool
+ default y
+
+config MPIC
+ depends on PPC_PSERIES || PPC_PMAC || PPC_MAPLE
+ bool
+ default y
+
+config BPA_IIC
+ depends on PPC_BPA
+ bool
+ default y
+
# VMX is pSeries only for now until somebody writes the iSeries
# exception vectors for it
config ALTIVEC
Index: linus-2.5/arch/ppc64/kernel/Makefile
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/Makefile 2005-04-22 06:59:52.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/Makefile 2005-04-22 07:01:07.000000000 +0200
@@ -28,13 +28,13 @@
mf.o HvLpEvent.o iSeries_proc.o iSeries_htab.o \
iSeries_iommu.o
-obj-$(CONFIG_PPC_MULTIPLATFORM) += nvram.o i8259.o prom_init.o prom.o mpic.o
+obj-$(CONFIG_PPC_MULTIPLATFORM) += nvram.o i8259.o prom_init.o prom.o
obj-$(CONFIG_PPC_PSERIES) += pSeries_pci.o pSeries_lpar.o pSeries_hvCall.o \
pSeries_nvram.o rtasd.o ras.o pSeries_reconfig.o \
- xics.o pSeries_setup.o pSeries_iommu.o
+ pSeries_setup.o pSeries_iommu.o
-obj-$(CONFIG_PPC_BPA) += bpa_setup.o bpa_nvram.o
+obj-$(CONFIG_PPC_BPA) += bpa_setup.o bpa_nvram.o bpa_iic.o spider-pic.o
obj-$(CONFIG_EEH) += eeh.o
obj-$(CONFIG_PROC_FS) += proc_ppc64.o
@@ -50,6 +50,8 @@
obj-$(CONFIG_BOOTX_TEXT) += btext.o
obj-$(CONFIG_HVCS) += hvcserver.o
obj-$(CONFIG_IBMVIO) += vio.o
+obj-$(CONFIG_XICS) += xics.o
+obj-$(CONFIG_MPIC) += mpic.o
obj-$(CONFIG_PPC_PMAC) += pmac_setup.o pmac_feature.o pmac_pci.o \
pmac_time.o pmac_nvram.o pmac_low_i2c.o
Index: linus-2.5/arch/ppc64/kernel/bpa_iic.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linus-2.5/arch/ppc64/kernel/bpa_iic.c 2005-04-22 06:59:58.000000000 +0200
@@ -0,0 +1,270 @@
+/*
+ * BPA Internal Interrupt Controller
+ *
+ * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
+ *
+ * Author: Arnd Bergmann <arndb@de.ibm.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, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/config.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/percpu.h>
+#include <linux/types.h>
+
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/prom.h>
+#include <asm/ptrace.h>
+
+#include "bpa_iic.h"
+
+struct iic_pending_bits {
+ u32 data;
+ u8 flags;
+ u8 class;
+ u8 source;
+ u8 prio;
+};
+
+enum iic_pending_flags {
+ IIC_VALID = 0x80,
+ IIC_IPI = 0x40,
+};
+
+struct iic_regs {
+ struct iic_pending_bits pending;
+ struct iic_pending_bits pending_destr;
+ u64 generate;
+ u64 prio;
+};
+
+struct iic {
+ struct iic_regs __iomem *regs;
+};
+
+static DEFINE_PER_CPU(struct iic, iic);
+
+void iic_local_enable(void)
+{
+ out_be64(&__get_cpu_var(iic).regs->prio, 0xff);
+}
+
+void iic_local_disable(void)
+{
+ out_be64(&__get_cpu_var(iic).regs->prio, 0x0);
+}
+
+static unsigned int iic_startup(unsigned int irq)
+{
+ return 0;
+}
+
+static void iic_enable(unsigned int irq)
+{
+ iic_local_enable();
+}
+
+static void iic_disable(unsigned int irq)
+{
+}
+
+static void iic_end(unsigned int irq)
+{
+ iic_local_enable();
+}
+
+static struct hw_interrupt_type iic_pic = {
+ .typename = " BPA-IIC ",
+ .startup = iic_startup,
+ .enable = iic_enable,
+ .disable = iic_disable,
+ .end = iic_end,
+};
+
+static int iic_external_get_irq(struct iic_pending_bits pending)
+{
+ int irq;
+ unsigned char node, unit;
+
+ node = pending.source >> 4;
+ unit = pending.source & 0xf;
+ irq = -1;
+
+ /*
+ * This mapping is specific to the Broadband
+ * Engine. We might need to get the numbers
+ * from the device tree to support future CPUs.
+ */
+ switch (unit) {
+ case 0x00:
+ case 0x0b:
+ /*
+ * One of these units can be connected
+ * to an external interrupt controller.
+ */
+ if (pending.prio > 0x3f ||
+ pending.class != 2)
+ break;
+ irq = IIC_EXT_OFFSET
+ + spider_get_irq(pending.prio + node * IIC_NODE_STRIDE)
+ + node * IIC_NODE_STRIDE;
+ break;
+ case 0x01 ... 0x04:
+ case 0x07 ... 0x0a:
+ /*
+ * These units are connected to the SPEs
+ */
+ if (pending.class > 2)
+ break;
+ irq = IIC_SPE_OFFSET
+ + pending.class * IIC_CLASS_STRIDE
+ + node * IIC_NODE_STRIDE
+ + unit;
+ break;
+ }
+ if (irq == -1)
+ printk(KERN_WARNING "Unexpected interrupt class %02x, "
+ "source %02x, prio %02x, cpu %02x\n", pending.class,
+ pending.source, pending.prio, smp_processor_id());
+ return irq;
+}
+
+/* Get an IRQ number from the pending state register of the IIC */
+int iic_get_irq(struct pt_regs *regs)
+{
+ struct iic *iic;
+ int irq;
+ struct iic_pending_bits pending;
+
+ iic = &__get_cpu_var(iic);
+ *(unsigned long *) &pending =
+ in_be64((unsigned long __iomem *) &iic->regs->pending_destr);
+
+ irq = -1;
+ if (pending.flags & IIC_VALID) {
+ if (pending.flags & IIC_IPI) {
+ irq = IIC_IPI_OFFSET + (pending.prio >> 4);
+/*
+ if (irq > 0x80)
+ printk(KERN_WARNING "Unexpected IPI prio %02x"
+ "on CPU %02x\n", pending.prio,
+ smp_processor_id());
+*/
+ } else {
+ irq = iic_external_get_irq(pending);
+ }
+ }
+ return irq;
+}
+
+static struct iic_regs __iomem *find_iic(int cpu)
+{
+ struct device_node *np;
+ int nodeid = cpu / 2;
+ unsigned long regs;
+ struct iic_regs __iomem *iic_regs;
+
+ for (np = of_find_node_by_type(NULL, "cpu");
+ np;
+ np = of_find_node_by_type(np, "cpu")) {
+ if (nodeid == *(int *)get_property(np, "node-id", NULL))
+ break;
+ }
+
+ if (!np) {
+ printk(KERN_WARNING "IIC: CPU %d not found\n", cpu);
+ iic_regs = NULL;
+ } else {
+ regs = *(long *)get_property(np, "iic", NULL);
+
+ /* hack until we have decided on the devtree info */
+ regs += 0x400;
+ if (cpu & 1)
+ regs += 0x20;
+
+ printk(KERN_DEBUG "IIC for CPU %d at %lx\n", cpu, regs);
+ iic_regs = __ioremap(regs, sizeof(struct iic_regs),
+ _PAGE_NO_CACHE);
+ }
+ return iic_regs;
+}
+
+#ifdef CONFIG_SMP
+void iic_setup_cpu(void)
+{
+ out_be64(&__get_cpu_var(iic).regs->prio, 0xff);
+}
+
+void iic_cause_IPI(int cpu, int mesg)
+{
+ out_be64(&per_cpu(iic, cpu).regs->generate, mesg);
+}
+
+static irqreturn_t iic_ipi_action(int irq, void *dev_id, struct pt_regs *regs)
+{
+
+ smp_message_recv(irq - IIC_IPI_OFFSET, regs);
+ return IRQ_HANDLED;
+}
+
+static void iic_request_ipi(int irq, const char *name)
+{
+ /* IPIs are marked SA_INTERRUPT as they must run with irqs
+ * disabled */
+ get_irq_desc(irq)->handler = &iic_pic;
+ get_irq_desc(irq)->status |= IRQ_PER_CPU;
+ request_irq(irq, iic_ipi_action, SA_INTERRUPT, name, NULL);
+}
+
+void iic_request_IPIs(void)
+{
+ iic_request_ipi(IIC_IPI_OFFSET + PPC_MSG_CALL_FUNCTION, "IPI-call");
+ iic_request_ipi(IIC_IPI_OFFSET + PPC_MSG_RESCHEDULE, "IPI-resched");
+#ifdef CONFIG_DEBUGGER
+ iic_request_ipi(IIC_IPI_OFFSET + PPC_MSG_DEBUGGER_BREAK, "IPI-debug");
+#endif /* CONFIG_DEBUGGER */
+}
+#endif /* CONFIG_SMP */
+
+static void iic_setup_spe_handlers(void)
+{
+ int be, isrc;
+
+ /* Assume two threads per BE are present */
+ for (be=0; be < num_present_cpus() / 2; be++) {
+ for (isrc = 0; isrc < IIC_CLASS_STRIDE * 3; isrc++) {
+ int irq = IIC_NODE_STRIDE * be + IIC_SPE_OFFSET + isrc;
+ get_irq_desc(irq)->handler = &iic_pic;
+ }
+ }
+}
+
+void iic_init_IRQ(void)
+{
+ int cpu, irq_offset;
+ struct iic *iic;
+
+ irq_offset = 0;
+ for_each_cpu(cpu) {
+ iic = &per_cpu(iic, cpu);
+ iic->regs = find_iic(cpu);
+ if (iic->regs)
+ out_be64(&iic->regs->prio, 0xff);
+ }
+ iic_setup_spe_handlers();
+}
Index: linus-2.5/arch/ppc64/kernel/bpa_iic.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linus-2.5/arch/ppc64/kernel/bpa_iic.h 2005-04-22 06:59:58.000000000 +0200
@@ -0,0 +1,62 @@
+#ifndef ASM_BPA_IIC_H
+#define ASM_BPA_IIC_H
+#ifdef __KERNEL__
+/*
+ * Mapping of IIC pending bits into per-node
+ * interrupt numbers.
+ *
+ * IRQ FF CC SS PP FF CC SS PP Description
+ *
+ * 00-3f 80 02 +0 00 - 80 02 +0 3f South Bridge
+ * 00-3f 80 02 +b 00 - 80 02 +b 3f South Bridge
+ * 41-4a 80 00 +1 ** - 80 00 +a ** SPU Class 0
+ * 51-5a 80 01 +1 ** - 80 01 +a ** SPU Class 1
+ * 61-6a 80 02 +1 ** - 80 02 +a ** SPU Class 2
+ * 70-7f C0 ** ** 00 - C0 ** ** 0f IPI
+ *
+ * F flags
+ * C class
+ * S source
+ * P Priority
+ * + node number
+ * * don't care
+ *
+ * A node consists of a Broadband Engine and an optional
+ * south bridge device providing a maximum of 64 IRQs.
+ * The south bridge may be connected to either IOIF0
+ * or IOIF1.
+ * Each SPE is represented as three IRQ lines, one per
+ * interrupt class.
+ * 16 IRQ numbers are reserved for inter processor
+ * interruptions, although these are only used in the
+ * range of the first node.
+ *
+ * This scheme needs 128 IRQ numbers per BIF node ID,
+ * which means that with the total of 512 lines
+ * available, we can have a maximum of four nodes.
+ */
+
+enum {
+ IIC_EXT_OFFSET = 0x00, /* Start of south bridge IRQs */
+ IIC_NUM_EXT = 0x40, /* Number of south bridge IRQs */
+ IIC_SPE_OFFSET = 0x40, /* Start of SPE interrupts */
+ IIC_CLASS_STRIDE = 0x10, /* SPE IRQs per class */
+ IIC_IPI_OFFSET = 0x70, /* Start of IPI IRQs */
+ IIC_NUM_IPIS = 0x10, /* IRQs reserved for IPI */
+ IIC_NODE_STRIDE = 0x80, /* Total IRQs per node */
+};
+
+extern void iic_init_IRQ(void);
+extern int iic_get_irq(struct pt_regs *regs);
+extern void iic_cause_IPI(int cpu, int mesg);
+extern void iic_request_IPIs(void);
+extern void iic_setup_cpu(void);
+extern void iic_local_enable(void);
+extern void iic_local_disable(void);
+
+
+extern void spider_init_IRQ(void);
+extern int spider_get_irq(unsigned long int_pending);
+
+#endif
+#endif /* ASM_BPA_IIC_H */
Index: linus-2.5/arch/ppc64/kernel/bpa_setup.c
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/bpa_setup.c 2005-04-22 06:59:52.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/bpa_setup.c 2005-04-22 06:59:58.000000000 +0200
@@ -45,6 +45,7 @@
#include <asm/cputable.h>
#include "pci.h"
+#include "bpa_iic.h"
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
@@ -143,6 +144,9 @@
static void __init bpa_setup_arch(void)
{
+ ppc_md.init_IRQ = iic_init_IRQ;
+ ppc_md.get_irq = iic_get_irq;
+
#ifdef CONFIG_SMP
smp_init_pSeries();
#endif
@@ -158,7 +162,7 @@
/* Find and initialize PCI host bridges */
init_pci_config_tokens();
find_and_init_phbs();
-
+ spider_init_IRQ();
#ifdef CONFIG_DUMMY_CONSOLE
conswitchp = &dummy_con;
#endif
Index: linus-2.5/arch/ppc64/kernel/pSeries_smp.c
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/pSeries_smp.c 2005-04-22 06:58:22.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/pSeries_smp.c 2005-04-22 06:59:58.000000000 +0200
@@ -1,5 +1,5 @@
/*
- * SMP support for pSeries machines.
+ * SMP support for pSeries and BPA machines.
*
* Dave Engebretsen, Peter Bergner, and
* Mike Corrigan {engebret|bergner|mikec}@us.ibm.com
@@ -47,6 +47,7 @@
#include <asm/pSeries_reconfig.h>
#include "mpic.h"
+#include "bpa_iic.h"
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
@@ -286,6 +287,7 @@
return 1;
}
+#ifdef CONFIG_XICS
static inline void smp_xics_do_message(int cpu, int msg)
{
set_bit(msg, &xics_ipi_message[cpu].value);
@@ -334,6 +336,37 @@
rtas_set_indicator(GLOBAL_INTERRUPT_QUEUE,
(1UL << interrupt_server_size) - 1 - default_distrib_server, 1);
}
+#endif /* CONFIG_XICS */
+#ifdef CONFIG_BPA_IIC
+static void smp_iic_message_pass(int target, int msg)
+{
+ unsigned int i;
+
+ if (target < NR_CPUS) {
+ iic_cause_IPI(target, msg);
+ } else {
+ for_each_online_cpu(i) {
+ if (target == MSG_ALL_BUT_SELF
+ && i == smp_processor_id())
+ continue;
+ iic_cause_IPI(i, msg);
+ }
+ }
+}
+
+static int __init smp_iic_probe(void)
+{
+ iic_request_IPIs();
+
+ return cpus_weight(cpu_possible_map);
+}
+
+static void __devinit smp_iic_setup_cpu(int cpu)
+{
+ if (cpu != boot_cpuid)
+ iic_setup_cpu();
+}
+#endif /* CONFIG_BPA_IIC */
static DEFINE_SPINLOCK(timebase_lock);
static unsigned long timebase = 0;
@@ -388,14 +421,15 @@
return 1;
}
-
+#ifdef CONFIG_MPIC
static struct smp_ops_t pSeries_mpic_smp_ops = {
.message_pass = smp_mpic_message_pass,
.probe = smp_mpic_probe,
.kick_cpu = smp_pSeries_kick_cpu,
.setup_cpu = smp_mpic_setup_cpu,
};
-
+#endif
+#ifdef CONFIG_XICS
static struct smp_ops_t pSeries_xics_smp_ops = {
.message_pass = smp_xics_message_pass,
.probe = smp_xics_probe,
@@ -403,6 +437,16 @@
.setup_cpu = smp_xics_setup_cpu,
.cpu_bootable = smp_pSeries_cpu_bootable,
};
+#endif
+#ifdef CONFIG_BPA_IIC
+static struct smp_ops_t bpa_iic_smp_ops = {
+ .message_pass = smp_iic_message_pass,
+ .probe = smp_iic_probe,
+ .kick_cpu = smp_pSeries_kick_cpu,
+ .setup_cpu = smp_iic_setup_cpu,
+ .cpu_bootable = smp_pSeries_cpu_bootable,
+};
+#endif
/* This is called very early */
void __init smp_init_pSeries(void)
@@ -411,10 +455,25 @@
DBG(" -> smp_init_pSeries()\n");
- if (ppc64_interrupt_controller == IC_OPEN_PIC)
+ switch (ppc64_interrupt_controller) {
+#ifdef CONFIG_MPIC
+ case IC_OPEN_PIC:
smp_ops = &pSeries_mpic_smp_ops;
- else
+ break;
+#endif
+#ifdef CONFIG_XICS
+ case IC_PPC_XIC:
smp_ops = &pSeries_xics_smp_ops;
+ break;
+#endif
+#ifdef CONFIG_BPA_IIC
+ case IC_BPA_IIC:
+ smp_ops = &bpa_iic_smp_ops;
+ break;
+#endif
+ default:
+ panic("Invalid interrupt controller");
+ }
#ifdef CONFIG_HOTPLUG_CPU
smp_ops->cpu_disable = pSeries_cpu_disable;
Index: linus-2.5/arch/ppc64/kernel/smp.c
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/smp.c 2005-04-22 06:58:22.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/smp.c 2005-04-22 06:59:58.000000000 +0200
@@ -71,7 +71,7 @@
int smt_enabled_at_boot = 1;
-#ifdef CONFIG_PPC_MULTIPLATFORM
+#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_PMAC) || defined(CONFIG_PPC_MAPLE)
void smp_mpic_message_pass(int target, int msg)
{
/* make sure we're sending something that translates to an IPI */
Index: linus-2.5/arch/ppc64/kernel/spider-pic.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linus-2.5/arch/ppc64/kernel/spider-pic.c 2005-04-22 06:59:58.000000000 +0200
@@ -0,0 +1,191 @@
+/*
+ * External Interrupt Controller on Spider South Bridge
+ *
+ * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
+ *
+ * Author: Arnd Bergmann <arndb@de.ibm.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, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+
+#include <asm/pgtable.h>
+#include <asm/prom.h>
+#include <asm/io.h>
+
+#include "bpa_iic.h"
+
+/* register layout taken from Spider spec, table 7.4-4 */
+enum {
+ TIR_DEN = 0x004, /* Detection Enable Register */
+ TIR_MSK = 0x084, /* Mask Level Register */
+ TIR_EDC = 0x0c0, /* Edge Detection Clear Register */
+ TIR_PNDA = 0x100, /* Pending Register A */
+ TIR_PNDB = 0x104, /* Pending Register B */
+ TIR_CS = 0x144, /* Current Status Register */
+ TIR_LCSA = 0x150, /* Level Current Status Register A */
+ TIR_LCSB = 0x154, /* Level Current Status Register B */
+ TIR_LCSC = 0x158, /* Level Current Status Register C */
+ TIR_LCSD = 0x15c, /* Level Current Status Register D */
+ TIR_CFGA = 0x200, /* Setting Register A0 */
+ TIR_CFGB = 0x204, /* Setting Register B0 */
+ /* 0x208 ... 0x3ff Setting Register An/Bn */
+ TIR_PPNDA = 0x400, /* Packet Pending Register A */
+ TIR_PPNDB = 0x404, /* Packet Pending Register B */
+ TIR_PIERA = 0x408, /* Packet Output Error Register A */
+ TIR_PIERB = 0x40c, /* Packet Output Error Register B */
+ TIR_PIEN = 0x444, /* Packet Output Enable Register */
+ TIR_PIPND = 0x454, /* Packet Output Pending Register */
+ TIRDID = 0x484, /* Spider Device ID Register */
+ REISTIM = 0x500, /* Reissue Command Timeout Time Setting */
+ REISTIMEN = 0x504, /* Reissue Command Timeout Setting */
+ REISWAITEN = 0x508, /* Reissue Wait Control*/
+};
+
+static void __iomem *spider_pics[4];
+
+static void __iomem *spider_get_pic(int irq)
+{
+ int node = irq / IIC_NODE_STRIDE;
+ irq %= IIC_NODE_STRIDE;
+
+ if (irq >= IIC_EXT_OFFSET &&
+ irq < IIC_EXT_OFFSET + IIC_NUM_EXT &&
+ spider_pics)
+ return spider_pics[node];
+ return NULL;
+}
+
+static int spider_get_nr(unsigned int irq)
+{
+ return (irq % IIC_NODE_STRIDE) - IIC_EXT_OFFSET;
+}
+
+static void __iomem *spider_get_irq_config(int irq)
+{
+ void __iomem *pic;
+ pic = spider_get_pic(irq);
+ return pic + TIR_CFGA + 8 * spider_get_nr(irq);
+}
+
+static void spider_enable_irq(unsigned int irq)
+{
+ void __iomem *cfg = spider_get_irq_config(irq);
+ irq = spider_get_nr(irq);
+
+ out_be32(cfg, in_be32(cfg) | 0x3107000eu);
+ out_be32(cfg + 4, in_be32(cfg + 4) | 0x00020000u | irq);
+}
+
+static void spider_disable_irq(unsigned int irq)
+{
+ void __iomem *cfg = spider_get_irq_config(irq);
+ irq = spider_get_nr(irq);
+
+ out_be32(cfg, in_be32(cfg) & ~0x30000000u);
+}
+
+static unsigned int spider_startup_irq(unsigned int irq)
+{
+ spider_enable_irq(irq);
+ return 0;
+}
+
+static void spider_shutdown_irq(unsigned int irq)
+{
+ spider_disable_irq(irq);
+}
+
+static void spider_end_irq(unsigned int irq)
+{
+ spider_enable_irq(irq);
+}
+
+static void spider_ack_irq(unsigned int irq)
+{
+ spider_disable_irq(irq);
+ iic_local_enable();
+}
+
+static struct hw_interrupt_type spider_pic = {
+ .typename = " SPIDER ",
+ .startup = spider_startup_irq,
+ .shutdown = spider_shutdown_irq,
+ .enable = spider_enable_irq,
+ .disable = spider_disable_irq,
+ .ack = spider_ack_irq,
+ .end = spider_end_irq,
+};
+
+
+int spider_get_irq(unsigned long int_pending)
+{
+ void __iomem *regs = spider_get_pic(int_pending);
+ unsigned long cs;
+ int irq;
+
+ cs = in_be32(regs + TIR_CS);
+
+ irq = cs >> 24;
+ if (irq != 63)
+ return irq;
+
+ return -1;
+}
+
+void spider_init_IRQ(void)
+{
+ int node;
+ struct device_node *dn;
+ unsigned int *property;
+ long spiderpic;
+ int n;
+
+/* FIXME: detect multiple PICs as soon as the device tree has them */
+ for (node = 0; node < 1; node++) {
+ dn = of_find_node_by_path("/");
+ n = prom_n_addr_cells(dn);
+ property = (unsigned int *) get_property(dn,
+ "platform-spider-pic", NULL);
+
+ if (!property)
+ continue;
+ for (spiderpic = 0; n > 0; --n)
+ spiderpic = (spiderpic << 32) + *property++;
+ printk(KERN_DEBUG "SPIDER addr: %lx\n", spiderpic);
+ spider_pics[node] = __ioremap(spiderpic, 0x800, _PAGE_NO_CACHE);
+ for (n = 0; n < IIC_NUM_EXT; n++) {
+ int irq = n + IIC_EXT_OFFSET + node * IIC_NODE_STRIDE;
+ get_irq_desc(irq)->handler = &spider_pic;
+
+ /* do not mask any interrupts because of level */
+ out_be32(spider_pics[node] + TIR_MSK, 0x0);
+
+ /* disable edge detection clear */
+ /* out_be32(spider_pics[node] + TIR_EDC, 0x0); */
+
+ /* enable interrupt packets to be output */
+ out_be32(spider_pics[node] + TIR_PIEN,
+ in_be32(spider_pics[node] + TIR_PIEN) | 0x1);
+
+ /* Enable the interrupt detection enable bit. Do this last! */
+ out_be32(spider_pics[node] + TIR_DEN,
+ in_be32(spider_pics[node] +TIR_DEN) | 0x1);
+
+ }
+ }
+}
^ permalink raw reply [flat|nested] 15+ messages in thread
* [PATCH 3/4] ppc64: Add driver for BPA iommu
2005-04-28 7:54 [PATCH 0/4] ppc64: Introduce BPA platform Arnd Bergmann
2005-04-28 7:56 ` [PATCH 1/4] ppc64: add BPA platform type Arnd Bergmann
2005-04-28 7:58 ` [PATCH 2/4] ppc64: Add driver for BPA interrupt controllers Arnd Bergmann
@ 2005-04-28 7:59 ` Arnd Bergmann
2005-04-28 14:05 ` Olof Johansson
2005-04-28 8:00 ` [PATCH 4/4] ppc64: Add SPU file system Arnd Bergmann
2005-04-28 14:44 ` [PATCH 0/4] ppc64: Introduce BPA platform Sonny Rao
4 siblings, 1 reply; 15+ messages in thread
From: Arnd Bergmann @ 2005-04-28 7:59 UTC (permalink / raw)
To: linuxppc64-dev
Cc: linux-kernel, Benjamin Herrenschmidt, Anton Blanchard, Paul Mackerras
Implementation of software load support for the BE iommu. This is very
different from other iommu code on ppc64, since we only do a static mapping.
The mapping is currently hardcoded but should really be read from the
firmware, but they don't set up the device nodes yet.
Software load is ok as long as the DMA windows all fit below 4GB.
Currently, there is a single 512MB DMA window for PCI, USB and
ethernet at 0x20000000 for our RAM. No machine we have has more
than 512 MB anyway, but we might want to change the firmware to use
separate DMA windows for each device.
Signed-off-by: Arnd Bergmann <arndb@de.ibm.com>
Index: linus-2.5/arch/ppc64/kernel/Makefile
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/Makefile 2005-04-22 07:01:07.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/Makefile 2005-04-22 07:02:10.000000000 +0200
@@ -34,7 +34,8 @@
pSeries_nvram.o rtasd.o ras.o pSeries_reconfig.o \
pSeries_setup.o pSeries_iommu.o
-obj-$(CONFIG_PPC_BPA) += bpa_setup.o bpa_nvram.o bpa_iic.o spider-pic.o
+obj-$(CONFIG_PPC_BPA) += bpa_setup.o bpa_iommu.o bpa_nvram.o \
+ bpa_iic.o spider-pic.o
obj-$(CONFIG_EEH) += eeh.o
obj-$(CONFIG_PROC_FS) += proc_ppc64.o
Index: linus-2.5/arch/ppc64/kernel/bpa_iommu.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linus-2.5/arch/ppc64/kernel/bpa_iommu.c 2005-04-22 07:01:39.000000000 +0200
@@ -0,0 +1,433 @@
+/*
+ * IOMMU implementation for Broadband Processor Architecture
+ * We just establish a linear mapping at boot by setting all the
+ * IOPT cache entries in the CPU.
+ * The mapping functions should be identical to pci_direct_iommu,
+ * except for the handling of the high order bit that is required
+ * by the Spider bridge. These should be split into a separate
+ * file at the point where we get a different bridge chip.
+ *
+ * Copyright (C) 2005 IBM Deutschland Entwicklung GmbH,
+ * Arnd Bergmann <arndb@de.ibm.com>
+ *
+ * Based on linear mapping
+ * Copyright (C) 2003 Benjamin Herrenschmidt (benh@kernel.crashing.org)
+ *
+ * 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.
+ */
+
+#undef DEBUG
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <linux/mm.h>
+#include <linux/dma-mapping.h>
+
+#include <asm/sections.h>
+#include <asm/iommu.h>
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/pci-bridge.h>
+#include <asm/machdep.h>
+#include <asm/pmac_feature.h>
+#include <asm/abs_addr.h>
+#include <asm/system.h>
+
+#include "pci.h"
+#include "bpa_iommu.h"
+
+#endif
+
+/* some constants */
+enum {
+ /* segment table entries */
+ IOST_VALID_MASK = 0x8000000000000000ul,
+ IOST_TAG_MASK = 0x3000000000000000ul,
+ IOST_PT_BASE_MASK = 0x000003fffffff000ul,
+ IOST_NNPT_MASK = 0x0000000000000fe0ul,
+ IOST_PS_MASK = 0x000000000000000ful,
+
+ IOST_PS_4K = 0x1,
+ IOST_PS_64K = 0x3,
+ IOST_PS_1M = 0x5,
+ IOST_PS_16M = 0x7,
+
+ /* iopt tag register */
+ IOPT_VALID_MASK = 0x0000000200000000ul,
+ IOPT_TAG_MASK = 0x00000001fffffffful,
+
+ /* iopt cache register */
+ IOPT_PROT_MASK = 0xc000000000000000ul,
+ IOPT_PROT_NONE = 0x0000000000000000ul,
+ IOPT_PROT_READ = 0x4000000000000000ul,
+ IOPT_PROT_WRITE = 0x8000000000000000ul,
+ IOPT_PROT_RW = 0xc000000000000000ul,
+ IOPT_COHERENT = 0x2000000000000000ul,
+
+ IOPT_ORDER_MASK = 0x1800000000000000ul,
+ /* order access to same IOID/VC on same address */
+ IOPT_ORDER_ADDR = 0x0800000000000000ul,
+ /* similar, but only after a write access */
+ IOPT_ORDER_WRITES = 0x1000000000000000ul,
+ /* Order all accesses to same IOID/VC */
+ IOPT_ORDER_VC = 0x1800000000000000ul,
+
+ IOPT_RPN_MASK = 0x000003fffffff000ul,
+ IOPT_HINT_MASK = 0x0000000000000800ul,
+ IOPT_IOID_MASK = 0x00000000000007fful,
+
+ IOSTO_ENABLE = 0x8000000000000000ul,
+ IOSTO_ORIGIN = 0x000003fffffff000ul,
+ IOSTO_HW = 0x0000000000000800ul,
+ IOSTO_SW = 0x0000000000000400ul,
+
+ IOCMD_CONF_TE = 0x0000800000000000ul,
+
+ /* memory mapped registers */
+ IOC_PT_CACHE_DIR = 0x000,
+ IOC_ST_CACHE_DIR = 0x800,
+ IOC_PT_CACHE_REG = 0x910,
+ IOC_ST_ORIGIN = 0x918,
+ IOC_CONF = 0x930,
+
+ /* The high bit needs to be set on every DMA address,
+ only 2GB are addressable */
+ BPA_DMA_VALID = 0x80000000,
+ BPA_DMA_MASK = 0x7fffffff,
+};
+
+static inline unsigned long
+get_iopt_entry(unsigned long real_address, unsigned long ioid,
+ unsigned long prot)
+{
+ return (prot & IOPT_PROT_MASK)
+ | (IOPT_COHERENT)
+ | (IOPT_ORDER_VC)
+ | (real_address & IOPT_RPN_MASK)
+ | (ioid & IOPT_IOID_MASK);
+}
+
+typedef struct {
+ unsigned long val;
+} ioste;
+
+/* cause link error for invalid use */
+extern unsigned long __ioc_invalid_page_size;
+
+static inline ioste
+get_iost_entry(unsigned long iopt_base, unsigned long io_address, unsigned page_size)
+{
+ unsigned long ps;
+ unsigned long iostep;
+ unsigned long nnpt;
+ unsigned long shift;
+
+ switch (page_size) {
+ case 0x1000000:
+ ps = IOST_PS_16M;
+ nnpt = 0; /* one page per segment */
+ shift = 5; /* segment has 16 iopt entries */
+ break;
+
+ case 0x100000:
+ ps = IOST_PS_1M;
+ nnpt = 0; /* one page per segment */
+ shift = 1; /* segment has 256 iopt entries */
+ break;
+
+ case 0x10000:
+ ps = IOST_PS_64K;
+ nnpt = 0x07; /* 8 pages per io page table */
+ shift = 0; /* all entries are used */
+ break;
+
+ case 0x1000:
+ ps = IOST_PS_4K;
+ nnpt = 0x7f; /* 128 pages per io page table */
+ shift = 0; /* all entries are used */
+ break;
+
+ default: /* not a known compile time constant */
+ ps = __ioc_invalid_page_size;
+ break;
+ }
+
+ iostep = iopt_base +
+ /* need 8 bytes per iopte */
+ (((io_address / page_size * 8)
+ /* align io page tables on 4k page boundaries */
+ << shift)
+ /* nnpt+1 pages go into each iopt */
+ & ~(nnpt << 12));
+
+ nnpt++; /* XXX is this right? */
+ return (ioste) {
+ .val = IOST_VALID_MASK
+ | (iostep & IOST_PT_BASE_MASK)
+ | ((nnpt << 5) & IOST_NNPT_MASK)
+ | (ps & IOST_PS_MASK)
+ };
+}
+
+/* compute the address of an io pte */
+static inline unsigned long
+get_ioptep(ioste iost_entry, unsigned long io_address)
+{
+ unsigned long iopt_base;
+ unsigned long ps;
+ unsigned long iopt_offset;
+
+ iopt_base = iost_entry.val & IOST_PT_BASE_MASK;
+ ps = iost_entry.val & IOST_PS_MASK;
+
+ iopt_offset = ((io_address & 0x0fffffff) >> (7 + 2 * ps)) & 0x7fff8ul;
+ return iopt_base + iopt_offset;
+}
+
+/* compute the tag field of the iopt cache entry */
+static inline unsigned long
+get_ioc_tag(ioste iost_entry, unsigned long io_address)
+{
+ unsigned long iopte = get_ioptep(iost_entry, io_address);
+
+ return IOPT_VALID_MASK
+ | ((iopte & 0x00000000000000ff8ul) >> 3)
+ | ((iopte & 0x0000003fffffc0000ul) >> 9);
+}
+
+/* compute the hashed 6 bit index for the 4-way associative pte cache */
+static inline unsigned long
+get_ioc_hash(ioste iost_entry, unsigned long io_address)
+{
+ unsigned long iopte = get_ioptep(iost_entry, io_address);
+
+ return ((iopte & 0x000000000000001f8ul) >> 3)
+ ^ ((iopte & 0x00000000000020000ul) >> 17)
+ ^ ((iopte & 0x00000000000010000ul) >> 15)
+ ^ ((iopte & 0x00000000000008000ul) >> 13)
+ ^ ((iopte & 0x00000000000004000ul) >> 11)
+ ^ ((iopte & 0x00000000000002000ul) >> 9)
+ ^ ((iopte & 0x00000000000001000ul) >> 7);
+}
+
+/* same as above, but pretend that we have a simpler 1-way associative
+ pte cache with an 8 bit index */
+static inline unsigned long
+get_ioc_hash_1way(ioste iost_entry, unsigned long io_address)
+{
+ unsigned long iopte = get_ioptep(iost_entry, io_address);
+
+ return ((iopte & 0x000000000000001f8ul) >> 3)
+ ^ ((iopte & 0x00000000000020000ul) >> 17)
+ ^ ((iopte & 0x00000000000010000ul) >> 15)
+ ^ ((iopte & 0x00000000000008000ul) >> 13)
+ ^ ((iopte & 0x00000000000004000ul) >> 11)
+ ^ ((iopte & 0x00000000000002000ul) >> 9)
+ ^ ((iopte & 0x00000000000001000ul) >> 7)
+ ^ ((iopte & 0x0000000000000c000ul) >> 8);
+}
+
+static inline ioste
+get_iost_cache(void __iomem *base, unsigned long index)
+{
+ unsigned long __iomem *p = (base + IOC_ST_CACHE_DIR);
+ return (ioste) { in_be64(&p[index]) };
+}
+
+static inline void
+set_iost_cache(void __iomem *base, unsigned long index, ioste ste)
+{
+ unsigned long __iomem *p = (base + IOC_ST_CACHE_DIR);
+ pr_debug("ioste %02lx was %016lx, store %016lx", index,
+ get_iost_cache(base, index).val, ste.val);
+ out_be64(&p[index], ste.val);
+ pr_debug(" now %016lx\n", get_iost_cache(base, index).val);
+}
+
+static inline unsigned long
+get_iopt_cache(void __iomem *base, unsigned long index, unsigned long *tag)
+{
+ unsigned long __iomem *tags = (void *)(base + IOC_PT_CACHE_DIR);
+ unsigned long __iomem *p = (void *)(base + IOC_PT_CACHE_REG);
+
+ *tag = tags[index];
+ rmb();
+ return *p;
+}
+
+static inline void
+set_iopt_cache(void __iomem *base, unsigned long index,
+ unsigned long tag, unsigned long val)
+{
+ unsigned long __iomem *tags = base + IOC_PT_CACHE_DIR;
+ unsigned long __iomem *p = base + IOC_PT_CACHE_REG;
+ pr_debug("iopt %02lx was v%016lx/t%016lx, store v%016lx/t%016lx\n",
+ index, get_iopt_cache(base, index, &oldtag), oldtag, val, tag);
+
+ out_be64(p, val);
+ out_be64(&tags[index], tag);
+}
+
+static inline void
+set_iost_origin(void __iomem *base)
+{
+ unsigned long __iomem *p = base + IOC_ST_ORIGIN;
+ unsigned long origin = IOSTO_ENABLE | IOSTO_SW;
+
+ pr_debug("iost_origin %016lx, now %016lx\n", in_be64(p), origin);
+ out_be64(p, origin);
+}
+
+static inline void
+set_iocmd_config(void __iomem *base)
+{
+ unsigned long __iomem *p = base + 0xc00;
+ unsigned long conf;
+
+ conf = in_be64(p);
+ pr_debug("iost_conf %016lx, now %016lx\n", conf, conf | IOCMD_CONF_TE);
+ out_be64(p, conf | IOCMD_CONF_TE);
+}
+
+#ifdef __KERNEL__
+
+/* FIXME: get these from the device tree */
+#define ioc_base 0x20000511000ull
+#define ioc_mmio_base 0x20000510000ull
+#define ioid 0x48a
+#define iopt_phys_offset (- 0x20000000) /* We have a 512MB offset from the SB */
+#define io_page_size 0x1000000
+
+static unsigned long map_iopt_entry(unsigned long address)
+{
+ switch (address >> 20) {
+ case 0x600:
+ address = 0x24020000000ull; /* spider i/o */
+ break;
+#if 0
+ case 0xa00:
+ address = 0x2400000000ull; /* iic */
+ break;
+#endif
+ default:
+ address += iopt_phys_offset;
+ break;
+ }
+
+ return get_iopt_entry(address, ioid, IOPT_PROT_RW);
+}
+
+static void iommu_bus_setup_null(struct pci_bus *b) { }
+static void iommu_dev_setup_null(struct pci_dev *d) { }
+
+/* initialize the iommu to support a simple linear mapping */
+static void bpa_map_iommu(void)
+{
+ unsigned long address;
+ void __iomem *base;
+ ioste ioste;
+ unsigned long index;
+
+ base = __ioremap(ioc_base, 0x1000, _PAGE_NO_CACHE);
+ pr_debug("%lx mapped to %p\n", ioc_base, base);
+ set_iocmd_config(base);
+ iounmap(base);
+
+ base = __ioremap(ioc_mmio_base, 0x1000, _PAGE_NO_CACHE);
+ pr_debug("%lx mapped to %p\n", ioc_mmio_base, base);
+
+ set_iost_origin(base);
+
+ for (address = 0; address < 0x100000000ul; address += io_page_size) {
+ ioste = get_iost_entry(0x10000000000ul, address, io_page_size);
+ if ((address & 0xfffffff) == 0) /* segment start */
+ set_iost_cache(base, address >> 28, ioste);
+ index = get_ioc_hash_1way(ioste, address);
+ pr_debug("addr %08lx, index %02lx, ioste %016lx\n",
+ address, index, ioste.val);
+ set_iopt_cache(base,
+ get_ioc_hash_1way(ioste, address),
+ get_ioc_tag(ioste, address),
+ map_iopt_entry(address));
+ }
+ iounmap(base);
+}
+
+
+static void *bpa_alloc_coherent(struct device *hwdev, size_t size,
+ dma_addr_t *dma_handle, unsigned int __nocast flag)
+{
+ void *ret;
+
+ ret = (void *)__get_free_pages(flag, get_order(size));
+ if (ret != NULL) {
+ memset(ret, 0, size);
+ *dma_handle = virt_to_abs(ret) | BPA_DMA_VALID;
+ }
+ return ret;
+}
+
+static void bpa_free_coherent(struct device *hwdev, size_t size,
+ void *vaddr, dma_addr_t dma_handle)
+{
+ free_pages((unsigned long)vaddr, get_order(size));
+}
+
+static dma_addr_t bpa_map_single(struct device *hwdev, void *ptr,
+ size_t size, enum dma_data_direction direction)
+{
+ return virt_to_abs(ptr) | BPA_DMA_VALID;
+}
+
+static void bpa_unmap_single(struct device *hwdev, dma_addr_t dma_addr,
+ size_t size, enum dma_data_direction direction)
+{
+}
+
+static int bpa_map_sg(struct device *hwdev, struct scatterlist *sg,
+ int nents, enum dma_data_direction direction)
+{
+ int i;
+
+ for (i = 0; i < nents; i++, sg++) {
+ sg->dma_address = (page_to_phys(sg->page) + sg->offset)
+ | BPA_DMA_VALID;
+ sg->dma_length = sg->length;
+ }
+
+ return nents;
+}
+
+static void bpa_unmap_sg(struct device *hwdev, struct scatterlist *sg,
+ int nents, enum dma_data_direction direction)
+{
+}
+
+static int bpa_dma_supported(struct device *dev, u64 mask)
+{
+ return mask < 0x100000000ull;
+}
+
+void bpa_init_iommu(void)
+{
+ bpa_map_iommu();
+
+ /* Direct I/O, IOMMU off */
+ ppc_md.iommu_dev_setup = iommu_dev_setup_null;
+ ppc_md.iommu_bus_setup = iommu_bus_setup_null;
+
+ pci_dma_ops.alloc_coherent = bpa_alloc_coherent;
+ pci_dma_ops.free_coherent = bpa_free_coherent;
+ pci_dma_ops.map_single = bpa_map_single;
+ pci_dma_ops.unmap_single = bpa_unmap_single;
+ pci_dma_ops.map_sg = bpa_map_sg;
+ pci_dma_ops.unmap_sg = bpa_unmap_sg;
+ pci_dma_ops.dma_supported = bpa_dma_supported;
+}
Index: linus-2.5/arch/ppc64/kernel/bpa_iommu.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linus-2.5/arch/ppc64/kernel/bpa_iommu.h 2005-04-22 07:01:39.000000000 +0200
@@ -0,0 +1,6 @@
+#ifndef BPA_IOMMU_H
+#define BPA_IOMMU_H
+
+void bpa_init_iommu(void);
+
+#endif
Index: linus-2.5/arch/ppc64/kernel/bpa_setup.c
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/bpa_setup.c 2005-04-22 06:59:58.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/bpa_setup.c 2005-04-22 07:01:39.000000000 +0200
@@ -46,6 +46,7 @@
#include "pci.h"
#include "bpa_iic.h"
+#include "bpa_iommu.h"
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
@@ -179,7 +180,7 @@
hpte_init_native();
- pci_direct_iommu_init();
+ bpa_init_iommu();
ppc64_interrupt_controller = IC_BPA_IIC;
^ permalink raw reply [flat|nested] 15+ messages in thread
* [PATCH 4/4] ppc64: Add SPU file system
2005-04-28 7:54 [PATCH 0/4] ppc64: Introduce BPA platform Arnd Bergmann
` (2 preceding siblings ...)
2005-04-28 7:59 ` [PATCH 3/4] ppc64: Add driver for BPA iommu Arnd Bergmann
@ 2005-04-28 8:00 ` Arnd Bergmann
2005-04-28 14:44 ` [PATCH 0/4] ppc64: Introduce BPA platform Sonny Rao
4 siblings, 0 replies; 15+ messages in thread
From: Arnd Bergmann @ 2005-04-28 8:00 UTC (permalink / raw)
To: linuxppc64-dev
Cc: linux-kernel, Benjamin Herrenschmidt, Anton Blanchard, Paul Mackerras
This is an early version of the SPU file system, which is used
to run code on the Synergistic Processing Units of the Broadband
Engine.
The file system provides a name space similar to posix shared
memory or message queues. Users that have write permissions
on the file system can create directories in the spufs root.
Every directory represents an SPU context, which is currently
mapped to a physical SPU, but that is going to change to a
virtualization scheme in future updates.
An SPU context directory contains a predefined set of files
used for manipulating the state of the logical SPU. Users
can change permissions on those files, but not actually
add or remove files without removing the complete directory.
The current set of files is:
/mem the contents of the local store memory of the SPU.
This can be accessed like a regular shared memory
file and contains both code and data in the address
space of the SPU.
The implemented file operations currently are read(),
write() and mmap(). We will need our own address
space operations as soon as we allow the SPU context
to be scheduled away from the physical SPU into
page cache.
/run A stub file that lets us do ioctl. The only ioctl
method we need is the spu_run() call. spu_run suspends
the current thread from the host CPU and transfers
the flow of execution to the SPU.
The ioctl call return to the calling thread when a state
is entered that can not be handled by the kernel, e.g.
an error in the SPU code or an exit() from it.
When a signal is pending for the host CPU thread, the
ioctl is interrupted and the SPU stopped in order to
call the signal handler.
/mbox The first SPU to CPU communication mailbox. This file
is read-only and can be read in units of 32 bits.
The file can only be used in non-blocking mode and
it even poll() will not block on it.
When no data is available in the mailbox, read() returns
EAGAIN.
/ibox The second SPU to CPU communication mailbox. This file
is similar to the first mailbox file, but can be read
in blocking I/O mode, and the poll familiy of system
calls can be used to wait for it.
/wbox The CPU to SPU communation mailbox. It is write-only
can can be written in units of 32 bits. If the mailbox
is full, write() will block and poll can be used to
wait for it becoming empty again.
Other files are planned but currently are not implemented or
not functional.
Signed-off-by: Arnd Bergmann <arndb@de.ibm.com>
--- linux-2.6-ppc.orig/arch/ppc64/kernel/Makefile 2005-04-01 12:52:36.202930304 -0500
+++ linux-2.6-ppc/arch/ppc64/kernel/Makefile 2005-04-01 12:53:32.093954472 -0500
@@ -53,6 +53,7 @@ obj-$(CONFIG_HVCS) += hvcserver.o
obj-$(CONFIG_IBMVIO) += vio.o
obj-$(CONFIG_XICS) += xics.o
obj-$(CONFIG_MPIC) += mpic.o
+obj-$(CONFIG_SPU_FS) += spu_base.o
obj-$(CONFIG_PPC_PMAC) += pmac_setup.o pmac_feature.o pmac_pci.o \
pmac_time.o pmac_nvram.o pmac_low_i2c.o
--- linux-2.6-ppc.orig/arch/ppc64/kernel/spu_base.c 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6-ppc/arch/ppc64/kernel/spu_base.c 2005-04-01 12:53:32.095954168 -0500
@@ -0,0 +1,573 @@
+/*
+ * Low-level SPU handling
+ *
+ * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
+ *
+ * Author: Arnd Bergmann <arndb@de.ibm.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, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#define DEBUG 1
+
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/wait.h>
+
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/semaphore.h>
+#include <asm/spu.h>
+#include <asm/mmu_context.h>
+
+#include "bpa_iic.h"
+
+static int __spu_trap_invalid_dma(struct spu *spu)
+{
+ pr_debug("%s\n", __FUNCTION__);
+ force_sig(SIGBUS, /* info, */ spu->task);
+ return 0;
+}
+
+static int __spu_trap_dma_align(struct spu *spu)
+{
+ pr_debug("%s\n", __FUNCTION__);
+ force_sig(SIGBUS, /* info, */ spu->task);
+ return 0;
+}
+
+static int __spu_trap_error(struct spu *spu)
+{
+ pr_debug("%s\n", __FUNCTION__);
+ force_sig(SIGILL, /* info, */ spu->task);
+ return 0;
+}
+
+static int __spu_trap_data_seg(struct spu *spu, unsigned long ea)
+{
+ struct spu_priv2 __iomem *priv2;
+ struct mm_struct *mm;
+
+ pr_debug("%s\n", __FUNCTION__);
+
+ if (REGION_ID(ea) != USER_REGION_ID) {
+ printk("invalid region access at %016lx\n", ea);
+ return 1;
+ }
+
+ priv2 = spu->priv2;
+ mm = spu->mm;
+
+ if (spu->slb_replace >= 8)
+ spu->slb_replace = 0;
+
+ out_be64(&priv2->slb_index_W, spu->slb_replace);
+ out_be64(&priv2->slb_vsid_RW,
+ (get_vsid(mm->context.id, ea) << SLB_VSID_SHIFT)
+ | SLB_VSID_USER);
+ out_be64(&priv2->slb_esid_RW, (ea & ESID_MASK) | SLB_ESID_V);
+ out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND);
+
+ printk("set slb %d context %lx, ea %016lx, vsid %016lx, esid %016lx\n",
+ spu->slb_replace, mm->context.id, ea,
+ (get_vsid(mm->context.id, ea) << SLB_VSID_SHIFT)| SLB_VSID_USER,
+ (ea & ESID_MASK) | SLB_ESID_V);
+ return 0;
+}
+
+static int __spu_trap_data_map(struct spu *spu, unsigned long ea)
+{
+ unsigned long dsisr;
+ struct spu_priv1 __iomem *priv1;
+
+ pr_debug("%s\n", __FUNCTION__);
+ priv1 = spu->priv1;
+ dsisr = in_be64(&priv1->mfc_dsisr_RW);
+
+ if (dsisr & MFC_DSISR_PTE_NOT_FOUND) {
+ printk("pte lookup ea %016lx, dsisr %lx\n", ea, dsisr);
+ wake_up(&spu->stop_wq);
+ } else {
+ printk("unexpexted data fault ea %016lx, dsisr %lx\n", ea, dsisr);
+ }
+
+ return 0;
+}
+
+static int __spu_trap_mailbox(struct spu *spu)
+{
+ pr_debug("%s\n", __FUNCTION__);
+ wake_up(&spu->mbox_wq);
+ return 0;
+}
+
+static int __spu_trap_stop(struct spu *spu)
+{
+ pr_debug("%s\n", __FUNCTION__);
+ spu->stop_code = in_be32(&spu->problem->spu_status_R);
+ wake_up(&spu->stop_wq);
+ return 0;
+}
+
+static int __spu_trap_halt(struct spu *spu)
+{
+ pr_debug("%s\n", __FUNCTION__);
+ spu->stop_code = in_be32(&spu->problem->spu_status_R);
+ wake_up(&spu->stop_wq);
+ return 0;
+}
+
+static int __spu_trap_tag_group(struct spu *spu)
+{
+ pr_debug("%s\n", __FUNCTION__);
+ /* wake_up(&spu->dma_wq); */
+ return 0;
+}
+
+static irqreturn_t
+spu_irq_class_0(int irq, void *data, struct pt_regs *regs)
+{
+ struct spu *spu;
+ unsigned long stat;
+
+ spu = data;
+ stat = in_be64(&spu->priv1->int_stat_class0_RW);
+
+ if (stat & 1) /* invalid MFC DMA */
+ __spu_trap_invalid_dma(spu);
+
+ if (stat & 2) /* invalid DMA alignment */
+ __spu_trap_dma_align(spu);
+
+ if (stat & 4) /* error on SPU */
+ __spu_trap_error(spu);
+
+ out_be64(&spu->priv1->int_stat_class0_RW, stat);
+ return stat ? IRQ_HANDLED : IRQ_NONE;
+}
+
+static irqreturn_t
+spu_irq_class_1(int irq, void *data, struct pt_regs *regs)
+{
+ struct spu *spu;
+ unsigned long stat, dar;
+
+ spu = data;
+ stat = in_be64(&spu->priv1->int_stat_class1_RW);
+ dar = in_be64(&spu->priv1->mfc_dar_RW);
+
+ if (stat & 1) /* segment fault */
+ __spu_trap_data_seg(spu, dar);
+
+ if (stat & 2) { /* mapping fault */
+ __spu_trap_data_map(spu, dar);
+ }
+
+ if (stat & 4) /* ls compare & suspend on get */
+ ;
+
+ if (stat & 8) /* ls compare & suspend on put */
+ ;
+
+ out_be64(&spu->priv1->int_stat_class1_RW, stat);
+ return stat ? IRQ_HANDLED : IRQ_NONE;
+}
+
+static irqreturn_t
+spu_irq_class_2(int irq, void *data, struct pt_regs *regs)
+{
+ struct spu *spu;
+ unsigned long stat;
+
+ spu = data;
+ stat = in_be64(&spu->priv1->int_stat_class2_RW);
+
+ if (stat & 1) /* mailbox */
+ __spu_trap_mailbox(spu);
+
+ if (stat & 2) /* SPU stop-and-signal */
+ __spu_trap_stop(spu);
+
+ if (stat & 4) /* SPU halted */
+ __spu_trap_halt(spu);
+
+ if (stat & 8) /* DMA tag group complete */
+ __spu_trap_tag_group(spu);
+
+ out_be64(&spu->priv1->int_stat_class2_RW, stat);
+ return stat ? IRQ_HANDLED : IRQ_NONE;
+}
+
+static int
+spu_request_irqs(struct spu *spu)
+{
+ int ret;
+ int irq_base;
+
+ irq_base = IIC_NODE_STRIDE * spu->node + IIC_SPE_OFFSET;
+
+ ret = request_irq(irq_base + spu->isrc,
+ spu_irq_class_0, 0, "spe_class0", spu);
+ if (ret)
+ goto out;
+ out_be64(&spu->priv1->int_mask_class0_RW, 0x7);
+
+ ret = request_irq(irq_base + IIC_CLASS_STRIDE + spu->isrc,
+ spu_irq_class_1, 0, "spe_class1", spu);
+ if (ret)
+ goto out1;
+ out_be64(&spu->priv1->int_mask_class1_RW, 0x3);
+
+ ret = request_irq(irq_base + 2*IIC_CLASS_STRIDE + spu->isrc,
+ spu_irq_class_2, 0, "spe_class2", spu);
+ if (ret)
+ goto out2;
+ out_be64(&spu->priv1->int_mask_class2_RW, 0xf);
+ goto out;
+
+out2:
+ free_irq(irq_base + IIC_CLASS_STRIDE + spu->isrc, spu);
+out1:
+ free_irq(irq_base + spu->isrc, spu);
+out:
+ return ret;
+}
+
+static void
+spu_free_irqs(struct spu *spu)
+{
+ int irq_base;
+
+ irq_base = IIC_NODE_STRIDE * spu->node + IIC_SPE_OFFSET;
+
+ free_irq(irq_base + spu->isrc, spu);
+ free_irq(irq_base + IIC_CLASS_STRIDE + spu->isrc, spu);
+ free_irq(irq_base + 2*IIC_CLASS_STRIDE + spu->isrc, spu);
+}
+
+static LIST_HEAD(spu_list);
+static DECLARE_MUTEX(spu_mutex);
+
+struct spu *spu_alloc(void)
+{
+ struct spu *spu;
+
+ down(&spu_mutex);
+ if (!list_empty(&spu_list)) {
+ spu = list_entry(spu_list.next, struct spu, list);
+ list_del_init(&spu->list);
+ printk("Got SPU %x\n", spu->isrc);
+ } else {
+ printk("No SPU left\n");
+ spu = NULL;
+ }
+ up(&spu_mutex);
+ return spu;
+}
+EXPORT_SYMBOL(spu_alloc);
+
+void spu_free(struct spu *spu)
+{
+ down(&spu_mutex);
+ list_add_tail(&spu->list, &spu_list);
+ up(&spu_mutex);
+}
+EXPORT_SYMBOL(spu_free);
+
+extern int hash_page(unsigned long ea, unsigned long access, unsigned long trap); //XXX
+static int spu_handle_pte_fault(struct spu *spu)
+{
+ struct spu_problem __iomem *prob;
+ struct spu_priv1 __iomem *priv1;
+ struct spu_priv2 __iomem *priv2;
+ unsigned long ea, access, is_write;
+ struct mm_struct *mm;
+ struct vm_area_struct *vma;
+ int ret;
+
+ printk("%s\n", __FUNCTION__);
+ prob = spu->problem;
+ priv1 = spu->priv1;
+ priv2 = spu->priv2;
+
+ ea = in_be64(&priv1->mfc_dar_RW);
+ access = _PAGE_PRESENT | _PAGE_USER;
+ is_write = in_be64(&priv1->mfc_dsisr_RW) & 0x02000000;
+ mm = spu->mm;
+
+ ret = hash_page(ea, access, 0x300);
+ if (ret < 0) {
+ printk("error in hash_page!\n");
+ ret = -EFAULT;
+ goto out_err;
+ }
+
+ printk("current %ld, spu %ld, ea %ld\n", current->mm->context.id, mm->context.id, ea);
+ if (!ret) {
+ printk("hash inserted, vsid %lx\n", get_vsid(current->mm->context.id, ea));
+ goto out_restart;
+ }
+
+ ret = -EFAULT;
+ if (ea >= TASK_SIZE)
+ goto out_err;
+
+ down_read(&mm->mmap_sem);
+ vma = find_vma(mm, ea);
+ if (!vma)
+ goto out;
+
+ if (is_write) {
+ if (!(vma->vm_flags & VM_WRITE))
+ goto out;
+ }
+
+ ret = 0;
+/* FIXME add missing code from do_page_fault */
+ switch (handle_mm_fault(mm, vma, ea, is_write)) {
+ case VM_FAULT_MINOR:
+ printk("minor\n");
+ current->min_flt++;
+ break;
+ case VM_FAULT_MAJOR:
+ printk("major\n");
+ current->maj_flt++;
+ break;
+ case VM_FAULT_SIGBUS:
+ ret = -EFAULT;
+ break;
+ case VM_FAULT_OOM:
+ ret = -ENOMEM;
+ break;
+ default:
+ BUG();
+ }
+out:
+ up_read(&mm->mmap_sem);
+ if (ret)
+ goto out_err;
+out_restart:
+ out_be64(&priv2->mfc_control_RW, MFC_CNTL_RESTART_DMA_COMMAND);
+out_err:
+ printk("%s: returning %d\n", __FUNCTION__, ret);
+ return ret;
+}
+
+int spu_run(struct spu *spu)
+{
+ struct spu_problem __iomem *prob;
+ struct spu_priv1 __iomem *priv1;
+ struct spu_priv2 __iomem *priv2;
+ unsigned long status;
+ int count = 10;
+ int ret;
+
+ prob = spu->problem;
+ priv1 = spu->priv1;
+ priv2 = spu->priv2;
+ spu->mm = current->mm;
+ spu->task = current;
+ out_be32(&prob->spu_runcntl_RW, SPU_RUNCNTL_RUNNABLE);
+
+ do {
+ ret = wait_event_interruptible(spu->stop_wq,
+ (!((status = in_be32(&prob->spu_status_R)) & 0x1))
+ || (in_be64(&priv1->mfc_dsisr_RW) & MFC_DSISR_PTE_NOT_FOUND));
+
+ if (status & SPU_STATUS_STOPPED_BY_STOP)
+ ret = -EAGAIN;
+ else if (status & SPU_STATUS_STOPPED_BY_HALT)
+ ret = -EIO;
+ else if (in_be64(&priv1->mfc_dsisr_RW) & MFC_DSISR_PTE_NOT_FOUND)
+ ret = spu_handle_pte_fault(spu);
+
+ } while (!ret && count--);
+ out_be32(&prob->spu_runcntl_RW, SPU_RUNCNTL_STOP);
+ out_be64(&priv2->slb_invalidate_all_W, 0);
+ spu->mm = NULL;
+ spu->task = NULL;
+
+ return ret;
+}
+EXPORT_SYMBOL(spu_run);
+
+static void __iomem * __init map_spe_prop(struct device_node *n,
+ const char *name)
+{
+ struct address_prop {
+ unsigned long address;
+ unsigned int len;
+ } __attribute__((packed)) *prop;
+
+ void *p;
+ int proplen;
+
+ p = get_property(n, name, &proplen);
+ if (proplen != sizeof (struct address_prop))
+ return NULL;
+
+ prop = p;
+
+ return ioremap(prop->address, prop->len);
+}
+
+static void spu_unmap(struct spu *spu)
+{
+ iounmap(spu->priv2);
+ iounmap(spu->priv1);
+ iounmap(spu->problem);
+ iounmap((u8 __iomem *)spu->local_store);
+}
+
+static int __init spu_map_device(struct spu *spu, struct device_node *spe)
+{
+ unsigned int *isrc_prop;
+ int ret;
+
+ ret = -ENODEV;
+ isrc_prop = (u32 *)get_property(spe, "isrc", NULL);
+ if (!isrc_prop)
+ goto out;
+ spu->isrc = *isrc_prop;
+
+ spu->name = get_property(spe, "name", NULL);
+ if (!spu->name)
+ goto out;
+
+ /* we use local store as ram, not io memory */
+ spu->local_store = (u8 __force *) map_spe_prop(spe, "local-store");
+ if (!spu->local_store)
+ goto out;
+
+ spu->problem= map_spe_prop(spe, "problem");
+ if (!spu->problem)
+ goto out_unmap;
+
+ spu->priv1= map_spe_prop(spe, "priv1");
+ if (!spu->priv1)
+ goto out_unmap;
+
+ spu->priv2= map_spe_prop(spe, "priv2");
+ if (!spu->priv2)
+ goto out_unmap;
+ ret = 0;
+ goto out;
+
+out_unmap:
+ spu_unmap(spu);
+out:
+ return ret;
+}
+
+static int __init find_spu_node_id(struct device_node *spe)
+{
+ unsigned int *id;
+ struct device_node *cpu;
+
+ cpu = spe->parent->parent;
+ id = (unsigned int *)get_property(cpu, "node-id", NULL);
+
+ return id ? *id : 0;
+}
+
+static int __init create_spu(struct device_node *spe)
+{
+ struct spu *spu;
+ int ret;
+
+ ret = -ENOMEM;
+ spu = kmalloc(sizeof (*spu), GFP_KERNEL);
+ if (!spu)
+ goto out;
+
+ ret = spu_map_device(spu, spe);
+ if (ret)
+ goto out_free;
+
+ spu->node = find_spu_node_id(spe);
+ spu->stop_code = 0;
+ spu->slb_replace = 0;
+ spu->mm = NULL;
+
+ out_be64(&spu->priv1->mfc_sdr_RW, mfspr(SPRN_SDR1));
+ out_be64(&spu->priv1->mfc_sr1_RW, 0x33);
+
+ init_waitqueue_head(&spu->stop_wq);
+ init_waitqueue_head(&spu->mbox_wq);
+
+ ret = spu_request_irqs(spu);
+ if (ret)
+ goto out_unmap;
+
+ down(&spu_mutex);
+ list_add(&spu->list, &spu_list);
+ up(&spu_mutex);
+
+ printk(KERN_DEBUG "Using SPE %s %02x %p %p %p %p\n",
+ spu->name, spu->isrc, spu->local_store,
+ spu->problem, spu->priv1, spu->priv2);
+ goto out;
+
+out_unmap:
+ spu_unmap(spu);
+out_free:
+ kfree(spu);
+out:
+ return ret;
+}
+
+static void destroy_spu(struct spu *spu)
+{
+ list_del_init(&spu->list);
+
+ spu_free_irqs(spu);
+ spu_unmap(spu);
+ kfree(spu);
+}
+
+static void cleanup_spu_base(void)
+{
+ struct spu *spu, *tmp;
+ down(&spu_mutex);
+ list_for_each_entry_safe(spu, tmp, &spu_list, list)
+ destroy_spu(spu);
+ up(&spu_mutex);
+}
+module_exit(cleanup_spu_base);
+
+static int __init init_spu_base(void)
+{
+ struct device_node *node;
+ int ret;
+
+ ret = -ENODEV;
+ for (node = of_find_node_by_type(NULL, "spe");
+ node; node = of_find_node_by_type(node, "spe")) {
+ ret = create_spu(node);
+ if (ret) {
+ printk(KERN_WARNING "%s: Error initializing %s\n",
+ __FUNCTION__, node->name);
+ cleanup_spu_base();
+ break;
+ }
+ }
+ return ret;
+}
+module_init(init_spu_base);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>");
--- linux-2.6-ppc.orig/arch/ppc64/mm/hash_utils.c 2005-04-01 12:39:56.616981816 -0500
+++ linux-2.6-ppc/arch/ppc64/mm/hash_utils.c 2005-04-01 12:53:32.098953712 -0500
@@ -355,6 +355,7 @@ int hash_page(unsigned long ea, unsigned
return ret;
}
+EXPORT_SYMBOL_GPL(hash_page);
void flush_hash_page(unsigned long context, unsigned long ea, pte_t pte,
int local)
--- linux-2.6-ppc.orig/fs/Kconfig 2005-04-01 12:39:56.619981360 -0500
+++ linux-2.6-ppc/fs/Kconfig 2005-04-01 12:53:32.100953408 -0500
@@ -853,6 +853,16 @@ config HUGETLBFS
config HUGETLB_PAGE
def_bool HUGETLBFS
+config SPU_FS
+ tristate "SPU file system"
+ default m
+ depends on PPC_BPA
+ help
+ The SPU file system is used to access Synergistic Processing
+ Units on machines implementing the Broadband Processor
+ Architecture.
+
+
config RAMFS
bool
default y
--- linux-2.6-ppc.orig/fs/Makefile 2005-04-01 12:39:56.621981056 -0500
+++ linux-2.6-ppc/fs/Makefile 2005-04-01 12:53:32.102953104 -0500
@@ -95,3 +95,4 @@ obj-$(CONFIG_BEFS_FS) += befs/
obj-$(CONFIG_HOSTFS) += hostfs/
obj-$(CONFIG_HPPFS) += hppfs/
obj-$(CONFIG_DEBUG_FS) += debugfs/
+obj-$(CONFIG_SPU_FS) += spufs/
--- linux-2.6-ppc.orig/fs/spufs/Makefile 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6-ppc/fs/spufs/Makefile 2005-04-01 12:53:32.104952800 -0500
@@ -0,0 +1,3 @@
+obj-$(CONFIG_SPU_FS) += spufs.o
+
+spufs-y += inode.o
--- linux-2.6-ppc.orig/fs/spufs/inode.c 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6-ppc/fs/spufs/inode.c 2005-04-01 12:53:32.107952344 -0500
@@ -0,0 +1,991 @@
+/*
+ * SPU file system
+ *
+ * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
+ *
+ * Author: Arnd Bergmann <arndb@de.ibm.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, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/fs.h>
+#include <linux/backing-dev.h>
+#include <linux/init.h>
+#include <linux/ioctl.h>
+#include <linux/module.h>
+#include <linux/pagemap.h>
+#include <linux/poll.h>
+#include <linux/slab.h>
+
+#include <asm/io.h>
+#include <asm/semaphore.h>
+#include <asm/spu.h>
+#include <asm/uaccess.h>
+
+/* SPU context abstraction */
+struct spu_context {
+ struct spu *spu; /* pointer to a physical SPU if SPUFS_DIRECT */
+ struct rw_semaphore backing_sema; /* protects the above */
+ spinlock_t mmio_lock; /* protects mmio access */
+ long sig;
+
+ struct kref kref;
+};
+
+static struct spu_context *
+alloc_spu_context(void)
+{
+ struct spu_context *ctx;
+ ctx = kmalloc(sizeof *ctx, GFP_KERNEL);
+ if (!ctx)
+ goto out;
+ ctx->spu = spu_alloc();
+ if (!ctx->spu)
+ goto out_free;
+ init_rwsem(&ctx->backing_sema);
+ spin_lock_init(&ctx->mmio_lock);
+ kref_init(&ctx->kref);
+ goto out;
+out_free:
+ kfree(ctx);
+ ctx = NULL;
+out:
+ return ctx;
+}
+
+static void
+destroy_spu_context(struct kref *kref)
+{
+ struct spu_context *ctx;
+ ctx = container_of(kref, struct spu_context, kref);
+ if (ctx->spu)
+ spu_free(ctx->spu);
+ kfree(ctx);
+}
+
+static struct spu_context *
+get_spu_context(struct spu_context *ctx)
+{
+ kref_get(&ctx->kref);
+ return ctx;
+}
+
+static void
+put_spu_context(struct spu_context *ctx)
+{
+ kref_put(&ctx->kref, &destroy_spu_context);
+}
+
+/* The magic number for our file system */
+enum {
+ SPUFS_MAGIC = 0x23c9b64e,
+};
+
+/* bits in the inode flags */
+enum {
+ SPUFS_DIRECT, /* Data resides on a physical SPU */
+};
+
+struct spufs_inode_info {
+ struct spu_context *i_ctx;
+ struct inode vfs_inode;
+};
+
+static kmem_cache_t *spufs_inode_cache;
+#define SPUFS_I(inode) container_of(inode, struct spufs_inode_info, vfs_inode)
+
+/* Information about the backing dev, same as ramfs */
+
+static struct backing_dev_info spufs_backing_dev_info = {
+ .ra_pages = 0, /* No readahead */
+ .capabilities = BDI_CAP_NO_ACCT_DIRTY | BDI_CAP_NO_WRITEBACK |
+ BDI_CAP_MAP_DIRECT | BDI_CAP_MAP_COPY | BDI_CAP_READ_MAP |
+ BDI_CAP_WRITE_MAP,
+};
+
+static struct address_space_operations spufs_aops = {
+ .readpage = simple_readpage,
+ .prepare_write = simple_prepare_write,
+ .commit_write = simple_commit_write,
+};
+
+/* File operations */
+
+static int
+spufs_open(struct inode *inode, struct file *file)
+{
+ struct spufs_inode_info *i = SPUFS_I(inode);
+ file->private_data = i->i_ctx;
+ return 0;
+}
+
+static ssize_t
+spufs_read(struct file *file, char __user *buffer, size_t size, loff_t *pos)
+{
+ struct spu *spu;
+ struct spu_context *ctx;
+ int ret;
+
+ ctx = file->private_data;
+ spu = ctx->spu;
+
+ down_read(&ctx->backing_sema);
+ if (spu->number & 0/*1*/) {
+ ret = generic_file_read(file, buffer, size, pos);
+ goto out;
+ }
+
+ ret = 0;
+ size = min_t(ssize_t, LS_SIZE - *pos, size);
+ if (size <= 0)
+ goto out;
+ *pos += size;
+ ret = copy_to_user(buffer, spu->local_store + *pos - size, size);
+ ret = ret ? -EFAULT : size;
+
+out:
+ up_read(&ctx->backing_sema);
+ return ret;
+}
+
+static ssize_t
+spufs_write(struct file *file, const char __user *buffer, size_t size, loff_t *pos)
+{
+ struct spu_context *ctx = file->private_data;
+ struct spu *spu = ctx->spu;
+
+ if (spu->number & 0) //1)
+ return generic_file_write(file, buffer, size, pos);
+
+ size = min_t(ssize_t, LS_SIZE - *pos, size);
+ if (size <= 0)
+ return -EFBIG;
+ *pos += size;
+ return copy_from_user(spu->local_store + *pos - size,
+ buffer, size) ? -EFAULT : size;
+}
+
+static int
+spufs_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct spu_context *ctx = file->private_data;
+ struct spu *spu = ctx->spu;
+ unsigned long pfn;
+
+ if (spu->number & 0) //1)
+ return generic_file_mmap(file, vma);
+
+ vma->vm_flags |= VM_RESERVED;
+ pfn = __pa(spu->local_store) >> PAGE_SHIFT;
+ /*
+ * This will work for actual SPUs, but not for vmalloc memory:
+ */
+ if (remap_pfn_range(vma, vma->vm_start, pfn,
+ vma->vm_end-vma->vm_start, vma->vm_page_prot))
+ return -EAGAIN;
+ /**/
+ return 0;
+}
+
+static struct file_operations spufs_mem_fops = {
+ .open = spufs_open,
+ .read = spufs_read,
+ .write = spufs_write,
+ .mmap = spufs_mmap,
+ .llseek = generic_file_llseek,
+};
+
+/* generic open function for all pipe-like files */
+static int spufs_pipe_open(struct inode *inode, struct file *file)
+{
+ struct spufs_inode_info *i = SPUFS_I(inode);
+ file->private_data = i->i_ctx;
+
+ return nonseekable_open(inode, file);
+}
+
+static ssize_t spufs_mbox_read(struct file *file, char __user *buf,
+ size_t len, loff_t *pos)
+{
+ struct spu_context *ctx;
+ struct spu_problem __iomem *prob;
+ u32 mbox_stat;
+ u32 mbox_data;
+
+ if (len < 4)
+ return -EINVAL;
+
+ ctx = file->private_data;
+ prob = ctx->spu->problem;
+ mbox_stat = in_be32(&prob->mb_stat_R);
+ if (!(mbox_stat & 0x0000ff))
+ return -EAGAIN;
+
+ mbox_data = in_be32(&prob->pu_mb_R);
+
+ if (copy_to_user(buf, &mbox_data, sizeof mbox_data))
+ return -EFAULT;
+
+ return 4;
+}
+
+static struct file_operations spufs_mbox_fops = {
+ .open = spufs_pipe_open,
+ .read = spufs_mbox_read,
+};
+
+static ssize_t spufs_ibox_read(struct file *file, char __user *buf,
+ size_t len, loff_t *pos)
+{
+ struct spu_context *ctx;
+ struct spu_problem __iomem *prob;
+ struct spu_priv2 __iomem *priv2;
+ u32 mbox_stat;
+ u32 ibox_data;
+ ssize_t ret;
+
+ if (len < 4)
+ return -EINVAL;
+
+ ctx = file->private_data;
+ prob = ctx->spu->problem;
+ priv2 = ctx->spu->priv2;
+
+ mbox_stat = in_be32(&prob->mb_stat_R);
+ if (!(mbox_stat & 0xff0000))
+ return -EAGAIN;
+
+ ibox_data = in_be64(&priv2->puint_mb_R);
+
+ ret = 4;
+ if (copy_to_user(buf, &ibox_data, sizeof ibox_data))
+ ret = -EFAULT;
+
+ return ret;
+}
+
+static unsigned int spufs_ibox_poll(struct file *file, poll_table *wait)
+{
+ struct spu_context *ctx;
+ struct spu_problem __iomem *prob;
+ u32 mbox_stat;
+ unsigned int mask;
+
+ ctx = file->private_data;
+ prob = ctx->spu->problem;
+ mbox_stat = in_be32(&prob->mb_stat_R);
+
+ poll_wait(file, &ctx->spu->mbox_wq, wait);
+
+ mask = 0;
+ if (mbox_stat & 0xff0000)
+ mask |= POLLIN | POLLRDNORM;
+
+ return mask;
+}
+
+static struct file_operations spufs_ibox_fops = {
+ .open = spufs_pipe_open,
+ .read = spufs_ibox_read,
+ .poll = spufs_ibox_poll,
+};
+
+static ssize_t spufs_wbox_write(struct file *file, const char __user *buf,
+ size_t len, loff_t *pos)
+{
+ struct spu_context *ctx;
+ struct spu_problem __iomem *prob;
+ u32 mbox_stat;
+ u32 wbox_data;
+
+ if (len < 4)
+ return -EINVAL;
+
+ ctx = file->private_data;
+ prob = ctx->spu->problem;
+ mbox_stat = in_be32(&prob->mb_stat_R);
+ if (!(mbox_stat & 0x00ff00))
+ return -EAGAIN;
+
+ if (copy_from_user(&wbox_data, buf, sizeof wbox_data))
+ return -EFAULT;
+
+ out_be32(&prob->spu_mb_W, wbox_data);
+
+ return 4;
+}
+
+static unsigned int spufs_wbox_poll(struct file *file, poll_table *wait)
+{
+ struct spu_context *ctx;
+ struct spu_problem __iomem *prob;
+ u32 mbox_stat;
+ unsigned int mask;
+
+ ctx = file->private_data;
+ prob = ctx->spu->problem;
+ mbox_stat = in_be32(&prob->mb_stat_R);
+
+ poll_wait(file, &ctx->spu->mbox_wq, wait);
+
+ mask = 0;
+ if (mbox_stat & 0x00ff00)
+ mask = POLLOUT | POLLWRNORM;
+
+ return mask;
+}
+
+static struct file_operations spufs_wbox_fops = {
+ .open = spufs_pipe_open,
+ .write = spufs_wbox_write,
+ .poll = spufs_wbox_poll,
+};
+
+static int spufs_run_open(struct inode *inode, struct file *file)
+{
+ struct spufs_inode_info *i = SPUFS_I(inode);
+ file->private_data = i->i_ctx;
+
+ return nonseekable_open(inode, file);
+}
+
+struct spufs_run_arg {
+ u32 npc; /* inout: Next Program Counter */
+ u32 status; /* out: SPU status */
+};
+
+static long spufs_run_ioctl(struct file *file, unsigned int num,
+ unsigned long arg)
+{
+ struct spu_context *ctx;
+ struct spu_problem __iomem *prob;
+ struct spufs_run_arg data;
+ int ret;
+
+ if (num != _IOWR('s', 0, struct spufs_run_arg))
+ return -EINVAL;
+
+ if (copy_from_user(&data, (void __user *)arg, sizeof data))
+ return -EFAULT;
+
+ ctx = file->private_data;
+ prob = ctx->spu->problem;
+ out_be32(&prob->spu_npc_RW, data.npc);
+ wmb();
+
+ ret = spu_run(ctx->spu);
+/*
+ prob->spu_npc_RW = data.npc;
+ ctx->spu->mm = current->mm;
+ wmb();
+ prob->spu_runcntl_RW = SPU_RUNCNTL_RUNNABLE;
+ mb();
+
+ ret = wait_event_interruptible(ctx->spu->stop_wq,
+ prob->spu_status_R & 0x3e);
+
+ prob->spu_runcntl_RW = SPU_RUNCNTL_STOP;
+ ctx->spu->mm = NULL;
+*/
+ data.status = in_be32(&prob->spu_status_R);
+ data.npc = in_be32(&prob->spu_npc_RW);
+ if (copy_to_user((void __user *)arg, &data, sizeof data))
+ ret = -EFAULT;
+
+ return ret;
+}
+
+static struct file_operations spufs_run_fops = {
+ .open = spufs_run_open,
+ .unlocked_ioctl = spufs_run_ioctl,
+ .compat_ioctl = spufs_run_ioctl,
+};
+
+
+/**** spufs attributes
+ *
+ * Attributes in spufs behave similar to those in sysfs:
+ *
+ * Writing to an attribute immediately sets a value, an open file can be
+ * written to multiple times.
+ *
+ * Reading from an attribute creates a buffer from the value that might get
+ * read with multiple read calls. When the attribute has been read completely,
+ * no further read calls are possible until the file is opened again.
+ *
+ * All spufs attributes contain a text representation of a numeric value that
+ * are accessed with the get() and set() functions.
+ *
+ * Perhaps these file operations could be put in debugfs or libfs instead,
+ * they are not really SPU specific.
+ */
+
+struct spufs_attr {
+ long (*get)(struct spu_context *);
+ void (*set)(struct spu_context *, long);
+ struct spu_context *ctx;
+ char get_buf[24]; /* enough to store a long and "\n\0" */
+ char set_buf[24];
+ struct semaphore sem; /* protects access to these buffers */
+};
+
+/* spufs_attr_open is called by an actual attribute open file operation
+ * to set the attribute specific access operations. */
+static int spufs_attr_open(struct inode *inode, struct file *file,
+ long (*get)(struct spu_context *),
+ void (*set)(struct spu_context *, long))
+{
+ struct spufs_attr *attr;
+
+ attr = kmalloc(sizeof *attr, GFP_KERNEL);
+ if (!attr)
+ return -ENOMEM;
+
+ /* reading/writing needs the respective get/set operation */
+ if (((file->f_mode & FMODE_READ) && !get) ||
+ ((file->f_mode & FMODE_WRITE) && !set))
+ return -EACCES;
+
+ attr->get = get;
+ attr->set = set;
+ attr->ctx = SPUFS_I(inode)->i_ctx;
+ init_MUTEX(&attr->sem);
+
+ file->private_data = attr;
+
+ return nonseekable_open(inode, file);
+}
+
+static int spufs_attr_close(struct inode *inode, struct file *file)
+{
+ kfree(file->private_data);
+ return 0;
+}
+
+/* read from the buffer that is filled with the get function */
+static ssize_t spufs_attr_read(struct file *file, char __user *buf,
+ size_t len, loff_t *ppos)
+{
+ struct spufs_attr *attr;
+ size_t size;
+ ssize_t ret;
+
+ attr = file->private_data;
+
+ down(&attr->sem);
+ if (*ppos) /* continued read */
+ size = strlen(attr->get_buf);
+ else /* first read */
+ size = scnprintf(attr->get_buf, sizeof (attr->get_buf),
+ "%ld\n", attr->get(attr->ctx));
+
+ ret = simple_read_from_buffer(buf, len, ppos, attr->get_buf, size);
+ up(&attr->sem);
+ return ret;
+}
+
+/* interpret the buffer as a number to call the set function with */
+static ssize_t spufs_attr_write(struct file *file, const char __user *buf,
+ size_t len, loff_t *ppos)
+{
+ struct spufs_attr *attr;
+ long val;
+ size_t size;
+ ssize_t ret;
+
+
+ attr = file->private_data;
+
+ down(&attr->sem);
+ ret = -EFAULT;
+ size = min(sizeof (attr->set_buf) - 1, len);
+ if (copy_from_user(attr->set_buf, buf, size))
+ goto out;
+
+ ret = len; /* claim we got the whole input */
+ attr->set_buf[size] = '\0';
+ val = simple_strtol(attr->set_buf, NULL, 0);
+ attr->set(attr->ctx, val);
+out:
+ up(&attr->sem);
+ return ret;
+}
+
+#define spufs_attribute(name) \
+static int name ## _open(struct inode *inode, struct file *file) \
+{ \
+ return spufs_attr_open(inode, file, &name ## _get, &name ## _set); \
+} \
+static struct file_operations name = { \
+ .open = name ## _open, \
+ .release = spufs_attr_close, \
+ .read = spufs_attr_read, \
+ .write = spufs_attr_write, \
+};
+
+
+static void spufs_signal1_type_set(struct spu_context *ctx, long val)
+{
+ ctx->sig = val;
+}
+
+static long spufs_signal1_type_get(struct spu_context *ctx)
+{
+ return ctx->sig;
+}
+
+spufs_attribute(spufs_signal1_type);
+
+static void spufs_class0_stat_set(struct spu_context *ctx, long val)
+{
+ out_be64(&ctx->spu->priv1->int_stat_class0_RW, val);
+}
+
+static long spufs_class0_stat_get(struct spu_context *ctx)
+{
+ return in_be64(&ctx->spu->priv1->int_stat_class0_RW);
+}
+
+spufs_attribute(spufs_class0_stat);
+
+static void spufs_class1_stat_set(struct spu_context *ctx, long val)
+{
+ out_be64(&ctx->spu->priv1->int_stat_class1_RW, val);
+}
+
+static long spufs_class1_stat_get(struct spu_context *ctx)
+{
+ return in_be64(&ctx->spu->priv1->int_stat_class1_RW);
+}
+
+spufs_attribute(spufs_class1_stat);
+
+static void spufs_class2_stat_set(struct spu_context *ctx, long val)
+{
+ out_be64(&ctx->spu->priv1->int_stat_class2_RW, val);
+}
+
+static long spufs_class2_stat_get(struct spu_context *ctx)
+{
+ return in_be64(&ctx->spu->priv1->int_stat_class2_RW);
+}
+
+spufs_attribute(spufs_class2_stat);
+
+static void spufs_class0_mask_set(struct spu_context *ctx, long val)
+{
+ out_be64(&ctx->spu->priv1->int_mask_class0_RW, val);
+}
+
+static long spufs_class0_mask_get(struct spu_context *ctx)
+{
+ return in_be64(&ctx->spu->priv1->int_mask_class0_RW);
+}
+
+spufs_attribute(spufs_class0_mask);
+
+static void spufs_class1_mask_set(struct spu_context *ctx, long val)
+{
+ out_be64(&ctx->spu->priv1->int_mask_class1_RW, val);
+}
+
+static long spufs_class1_mask_get(struct spu_context *ctx)
+{
+ return in_be64(&ctx->spu->priv1->int_mask_class1_RW);
+}
+
+spufs_attribute(spufs_class1_mask);
+
+static void spufs_class2_mask_set(struct spu_context *ctx, long val)
+{
+ out_be64(&ctx->spu->priv1->int_mask_class2_RW, val);
+}
+
+static long spufs_class2_mask_get(struct spu_context *ctx)
+{
+ return in_be64(&ctx->spu->priv1->int_mask_class2_RW);
+}
+
+spufs_attribute(spufs_class2_mask);
+
+#define priv1_attr(name) \
+static void spufs_ ## name ## _set(struct spu_context *ctx, long val) \
+{ out_be64(&ctx->spu->priv1->name, val); } \
+static long spufs_ ## name ## _get(struct spu_context *ctx) \
+{ return in_be64(&ctx->spu->priv1->name); } \
+spufs_attribute(spufs_ ## name)
+
+#define priv2_attr(name) \
+static void spufs_ ## name ## _set(struct spu_context *ctx, long val) \
+{ out_be64(&ctx->spu->priv2->name, val); } \
+static long spufs_ ## name ## _get(struct spu_context *ctx) \
+{ return in_be64(&ctx->spu->priv2->name); } \
+spufs_attribute(spufs_ ## name)
+
+priv1_attr(mfc_sr1_RW);
+priv1_attr(mfc_fir_R);
+priv1_attr(mfc_fir_status_or_W);
+priv1_attr(mfc_fir_status_and_W);
+priv1_attr(mfc_fir_mask_R);
+priv1_attr(mfc_fir_mask_or_W);
+priv1_attr(mfc_fir_mask_and_W);
+priv1_attr(mfc_fir_chkstp_enable_RW);
+priv1_attr(mfc_cer_R);
+priv1_attr(mfc_dsisr_RW);
+priv1_attr(mfc_dsir_R);
+priv1_attr(mfc_sdr_RW);
+priv2_attr(mfc_control_RW);
+
+/* Inode operations */
+
+static struct inode *
+spufs_alloc_inode(struct super_block *sb)
+{
+ struct spufs_inode_info *ei;
+
+ ei = kmem_cache_alloc(spufs_inode_cache, SLAB_KERNEL);
+ if (!ei)
+ return NULL;
+ return &ei->vfs_inode;
+}
+
+static void
+spufs_destroy_inode(struct inode *inode)
+{
+ kmem_cache_free(spufs_inode_cache, SPUFS_I(inode));
+}
+
+static void
+spufs_init_once(void *p, kmem_cache_t * cachep, unsigned long flags)
+{
+ struct spufs_inode_info *ei = p;
+
+ if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
+ SLAB_CTOR_CONSTRUCTOR) {
+ inode_init_once(&ei->vfs_inode);
+ }
+}
+
+static struct inode *
+spufs_new_inode(struct super_block *sb, int mode)
+{
+ struct inode *inode;
+
+ inode = new_inode(sb);
+ if (!inode)
+ goto out;
+
+ inode->i_mode = mode;
+ inode->i_uid = current->fsuid;
+ inode->i_gid = current->fsgid;
+ inode->i_blksize = PAGE_CACHE_SIZE;
+ inode->i_blocks = 0;
+ inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+out:
+ return inode;
+}
+
+static int
+spufs_setattr(struct dentry *dentry, struct iattr *attr)
+{
+ struct inode *inode = dentry->d_inode;
+
+/* dump_stack();
+ printk("ia_size %lld, i_size:%lld\n", attr->ia_size, inode->i_size);
+*/
+ if (attr->ia_size != inode->i_size)
+ return -EINVAL;
+ return inode_setattr(inode, attr);
+}
+
+/*
+static int
+spufs_create(struct inode *dir, struct dentry *dentry,
+ int mode, struct nameidata *nd)
+{
+ static struct inode_operations iops = {
+ .getattr = simple_getattr,
+ .setattr = spufs_setattr,
+ };
+
+
+ struct inode *inode;
+ int ret;
+
+ ret = -ENOSPC;
+ inode = spufs_new_inode(dir->i_sb, S_IFREG | mode);
+ if (!inode)
+ goto out;
+ inode->i_op = &iops;
+ inode->i_fop = &spufs_mem_fops;
+ inode->i_size = LS_SIZE;
+ SPUFS_I(inode)->i_spu = spu_alloc();
+ if (!SPUFS_I(inode)->i_spu)
+ goto out_iput;
+ inode->i_mapping->a_ops = &spufs_aops;
+ inode->i_mapping->backing_dev_info = &spufs_backing_dev_info;
+ d_instantiate(dentry, inode);
+ dget(dentry);
+ return 0;
+out_iput:
+ iput(inode);
+out:
+ return ret;
+}
+*/
+
+static void
+spufs_delete_inode(struct inode *inode)
+{
+ if (SPUFS_I(inode)->i_ctx)
+ put_spu_context(SPUFS_I(inode)->i_ctx);
+ clear_inode(inode);
+}
+
+static struct tree_descr spufs_dir_contents[] = {
+ { "mem", &spufs_mem_fops, 0644, },
+ { "run", &spufs_run_fops, 0400, },
+ { "mbox", &spufs_mbox_fops, 0400, },
+ { "ibox", &spufs_ibox_fops, 0400, },
+ { "wbox", &spufs_wbox_fops, 0200, },
+ { "signal1_type", &spufs_signal1_type, 0600, },
+ { "signal2_type", &spufs_signal1_type, 0600, },
+
+#if 1 /* debugging only */
+ { "class0_mask", &spufs_class0_mask, 0600, },
+ { "class1_mask", &spufs_class1_mask, 0600, },
+ { "class2_mask", &spufs_class2_mask, 0600, },
+ { "class0_stat", &spufs_class0_stat, 0600, },
+ { "class1_stat", &spufs_class1_stat, 0600, },
+ { "class2_stat", &spufs_class2_stat, 0600, },
+ { "sr1", &spufs_mfc_sr1_RW, 0600, },
+ { "fir", &spufs_mfc_fir_R, 0400, },
+ { "fir_status_or", &spufs_mfc_fir_status_or_W, 0200, },
+ { "fir_status_and", &spufs_mfc_fir_status_and_W, 0200, },
+ { "fir_mask", &spufs_mfc_fir_mask_R, 0400, },
+ { "fir_mask_or", &spufs_mfc_fir_mask_or_W, 0200, },
+ { "fir_mask_and", &spufs_mfc_fir_mask_and_W, 0200, },
+ { "fir_chkstp", &spufs_mfc_fir_chkstp_enable_RW, 0600, },
+ { "cer", &spufs_mfc_cer_R, 0400, },
+ { "dsisr", &spufs_mfc_dsisr_RW, 0600, },
+ { "dsir", &spufs_mfc_dsir_R, 0200, },
+ { "cntl", &spufs_mfc_control_RW, 0600, },
+ { "sdr", &spufs_mfc_sdr_RW, 0600, },
+#endif
+ {},
+};
+
+static int
+spufs_fill_dir(struct dentry *dir, struct tree_descr *files,
+ int mode, struct spu_context *ctx)
+{
+ struct inode *inode;
+ struct dentry *dentry;
+ int ret;
+
+ static struct inode_operations iops = {
+ .getattr = simple_getattr,
+ .setattr = spufs_setattr,
+ };
+
+ ret = -ENOSPC;
+ while (files->name && files->name[0]) {
+ dentry = d_alloc_name(dir, files->name);
+ if (!dentry)
+ goto out;
+ inode = spufs_new_inode(dir->d_sb,
+ S_IFREG | (files->mode & mode));
+ if (!inode)
+ goto out;
+ inode->i_op = &iops;
+ inode->i_fop = files->ops;
+ inode->i_mapping->a_ops = &spufs_aops;
+ inode->i_mapping->backing_dev_info = &spufs_backing_dev_info;
+ SPUFS_I(inode)->i_ctx = get_spu_context(ctx);
+
+ d_add(dentry, inode);
+ files++;
+ }
+ return 0;
+out:
+ // FIXME: remove all files that are left
+ return ret;
+}
+
+static int
+spufs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
+{
+ int ret;
+ struct inode *inode;
+ struct spu_context *ctx;
+
+ ret = -ENOSPC;
+ inode = spufs_new_inode(dir->i_sb, mode | S_IFDIR);
+ if (!inode)
+ goto out;
+
+ if (dir->i_mode & S_ISGID) {
+ inode->i_gid = dir->i_gid;
+ inode->i_mode |= S_ISGID;
+ }
+ ctx = alloc_spu_context();
+ SPUFS_I(inode)->i_ctx = ctx;
+ if (!ctx)
+ goto out_iput;
+
+ inode->i_op = &simple_dir_inode_operations;
+ inode->i_fop = &simple_dir_operations;
+ ret = spufs_fill_dir(dentry, spufs_dir_contents, mode, ctx);
+ if (ret)
+ goto out_free_ctx;
+
+ d_instantiate(dentry, inode);
+ dget(dentry);
+ dir->i_nlink++;
+ goto out;
+
+out_free_ctx:
+ put_spu_context(ctx);
+out_iput:
+ iput(inode);
+out:
+ return ret;
+}
+
+/* This looks really wrong! */
+static int spufs_rmdir(struct inode *root, struct dentry *dir_dentry)
+{
+ struct dentry *dentry;
+ int err;
+
+ spin_lock(&dcache_lock);
+
+ /* check if any entry is used */
+ err = -EBUSY;
+ list_for_each_entry(dentry, &dir_dentry->d_subdirs, d_child) {
+ if (d_unhashed(dentry) || !dentry->d_inode)
+ continue;
+ if (atomic_read(&dentry->d_count) != 1)
+ goto out;
+ }
+ /* remove all entries */
+ err = 0;
+ list_for_each_entry(dentry, &dir_dentry->d_subdirs, d_child) {
+ if (d_unhashed(dentry) || !dentry->d_inode)
+ continue;
+ atomic_dec(&dentry->d_count);
+ __d_drop(dentry);
+ }
+out:
+ spin_unlock(&dcache_lock);
+ if (!err) {
+ shrink_dcache_parent(dir_dentry);
+ err = simple_rmdir(root, dir_dentry);
+ }
+ return err;
+}
+
+/* File system initialization */
+
+static int
+spufs_create_root(struct super_block *sb) {
+ static struct inode_operations spufs_dir_inode_operations = {
+ .lookup = simple_lookup,
+ .mkdir = spufs_mkdir,
+ .rmdir = spufs_rmdir,
+// .rename = simple_rename, // XXX maybe
+ };
+
+ struct inode *inode;
+ int ret;
+
+ ret = -ENOMEM;
+ inode = spufs_new_inode(sb, S_IFDIR | 0777);
+
+ if (inode) {
+ inode->i_op = &spufs_dir_inode_operations;
+ inode->i_fop = &simple_dir_operations;
+ SPUFS_I(inode)->i_ctx = NULL;
+ sb->s_root = d_alloc_root(inode);
+ if (!sb->s_root)
+ iput(inode);
+ else
+ ret = 0;
+ }
+ return ret;
+}
+
+static int
+spufs_fill_super(struct super_block *sb, void *data, int silent)
+{
+ static struct super_operations s_ops = {
+ .alloc_inode = spufs_alloc_inode,
+ .destroy_inode = spufs_destroy_inode,
+ .statfs = simple_statfs,
+ .delete_inode = spufs_delete_inode,
+ .drop_inode = generic_delete_inode,
+ };
+
+ sb->s_maxbytes = MAX_LFS_FILESIZE;
+ sb->s_blocksize = PAGE_CACHE_SIZE;
+ sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
+ sb->s_magic = SPUFS_MAGIC;
+ sb->s_op = &s_ops;
+
+ return spufs_create_root(sb);
+}
+
+static struct super_block *
+spufs_get_sb(struct file_system_type *fstype, int flags,
+ const char *name, void *data)
+{
+ return get_sb_single(fstype, flags, data, spufs_fill_super);
+}
+
+static struct file_system_type spufs_type = {
+ .owner = THIS_MODULE,
+ .name = "spufs",
+ .get_sb = spufs_get_sb,
+ .kill_sb = kill_litter_super,
+};
+
+static int spufs_init(void)
+{
+ int ret;
+ ret = -ENOMEM;
+ spufs_inode_cache = kmem_cache_create("spufs_inode_cache",
+ sizeof(struct spufs_inode_info), 0,
+ SLAB_HWCACHE_ALIGN, spufs_init_once, NULL);
+
+ if (!spufs_inode_cache)
+ goto out;
+ ret = register_filesystem(&spufs_type);
+ if (ret)
+ kmem_cache_destroy(spufs_inode_cache);
+out:
+ return ret;
+}
+module_init(spufs_init);
+
+static void spufs_exit(void)
+{
+ unregister_filesystem(&spufs_type);
+ kmem_cache_destroy(spufs_inode_cache);
+}
+module_exit(spufs_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>");
+
--- linux-2.6-ppc.orig/include/asm-ppc64/spu.h 1969-12-31 19:00:00.000000000 -0500
+++ linux-2.6-ppc/include/asm-ppc64/spu.h 2005-04-01 12:55:10.054973928 -0500
@@ -0,0 +1,459 @@
+/*
+ * SPU core / file system interface and HW structures
+ *
+ * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
+ *
+ * Author: Arnd Bergmann <arndb@de.ibm.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, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef _SPU_H
+#define _SPU_H
+
+#define LS_ORDER (6) /* 256 kb */
+
+#define LS_SIZE (PAGE_SIZE << LS_ORDER)
+
+struct spu {
+ char *name;
+ u8 *local_store;
+ struct spu_problem __iomem *problem;
+ struct spu_priv1 __iomem *priv1;
+ struct spu_priv2 __iomem *priv2;
+ struct list_head list;
+ int number;
+ u32 isrc;
+ u32 node;
+ struct kref kref;
+ size_t ls_size;
+ unsigned int slb_replace;
+ struct mm_struct *mm;
+ struct task_struct *task;
+
+ u32 stop_code;
+ wait_queue_head_t stop_wq;
+ wait_queue_head_t mbox_wq;
+};
+
+struct spu *spu_alloc(void);
+void spu_free(struct spu *spu);
+int spu_run(struct spu *spu);
+
+/*
+ * This defines the Local Store, Problem Area and Privlege Area of an SPU.
+ */
+
+union MFC_TagSizeClassCmd {
+ struct {
+ u16 mfc_size;
+ u16 mfc_tag;
+ u8 pad;
+ u8 mfc_rclassid;
+ u16 mfc_cmd;
+ } u;
+ struct {
+ u32 mfc_size_tag32;
+ u32 mfc_class_cmd32;
+ } by32;
+ u64 all64;
+};
+
+struct MFC_cq_sr {
+ u64 mfc_cq_data0_RW;
+ u64 mfc_cq_data1_RW;
+ u64 mfc_cq_data2_RW;
+ u64 mfc_cq_data3_RW;
+};
+
+struct spu_problem {
+ u8 pad_0x0000_0x3000[0x3000 - 0x0000]; /* 0x0000 */
+
+ /* DMA Area */
+ u8 pad_0x3000_0x3004[0x4]; /* 0x3000 */
+ u32 mfc_lsa_W; /* 0x3004 */
+ u64 mfc_ea_W; /* 0x3008 */
+ union MFC_TagSizeClassCmd mfc_union_W; /* 0x3010 */
+ u8 pad_0x3018_0x3104[0xec]; /* 0x3018 */
+ u32 dma_qstatus_R; /* 0x3104 */
+ u8 pad_0x3108_0x3204[0xfc]; /* 0x3108 */
+ u32 dma_querytype_RW; /* 0x3204 */
+ u8 pad_0x3208_0x321c[0x14]; /* 0x3208 */
+ u32 dma_querymask_RW; /* 0x321c */
+ u8 pad_0x3220_0x322c[0xc]; /* 0x3220 */
+ u32 dma_tagstatus_R; /* 0x322c */
+#define DMA_TAGSTATUS_INTR_ANY 1u
+#define DMA_TAGSTATUS_INTR_ALL 2u
+ u8 pad_0x3230_0x4000[0x4000 - 0x3230]; /* 0x3230 */
+
+ /* SPU Control Area */
+ u8 pad_0x4000_0x4004[0x4]; /* 0x4000 */
+ u32 pu_mb_R; /* 0x4004 */
+ u8 pad_0x4008_0x400c[0x4]; /* 0x4008 */
+ u32 spu_mb_W; /* 0x400c */
+ u8 pad_0x4010_0x4014[0x4]; /* 0x4010 */
+ u32 mb_stat_R; /* 0x4014 */
+ u8 pad_0x4018_0x401c[0x4]; /* 0x4018 */
+ u32 spu_runcntl_RW; /* 0x401c */
+#define SPU_RUNCNTL_STOP 0L
+#define SPU_RUNCNTL_RUNNABLE 1L
+ u8 pad_0x4020_0x4024[0x4]; /* 0x4020 */
+ u32 spu_status_R; /* 0x4024 */
+#define SPU_STATUS_STOPPED 0x0
+#define SPU_STATUS_RUNNING 0x1
+#define SPU_STATUS_STOPPED_BY_STOP 0x2
+#define SPU_STATUS_STOPPED_BY_HALT 0x4
+#define SPU_STATUS_WAITING_FOR_CHANNEL 0x8
+#define SPU_STATUS_SINGLE_STEP 0x10
+ u8 pad_0x4028_0x402c[0x4]; /* 0x4028 */
+ u32 spu_spe_R; /* 0x402c */
+ u8 pad_0x4030_0x4034[0x4]; /* 0x4030 */
+ u32 spu_npc_RW; /* 0x4034 */
+ u8 pad_0x4038_0x14000[0x14000 - 0x4038]; /* 0x4038 */
+
+ /* Signal Notification Area */
+ u8 pad_0x14000_0x1400c[0xc]; /* 0x14000 */
+ u32 signal_notify1; /* 0x1400c */
+ u8 pad_0x14010_0x1c00c[0x7ffc]; /* 0x14010 */
+ u32 signal_notify2; /* 0x1c00c */
+} __attribute__ ((aligned(0x20000)));
+
+/* SPU Privilege 2 State Area */
+struct spu_priv2 {
+ /* MFC Registers */
+ u8 pad_0x0000_0x1100[0x1100 - 0x0000]; /* 0x0000 */
+
+ /* SLB Management Registers */
+ u8 pad_0x1100_0x1108[0x8]; /* 0x1100 */
+ u64 slb_index_W; /* 0x1108 */
+#define SLB_INDEX_MASK 0x7L
+ u64 slb_esid_RW; /* 0x1110 */
+ u64 slb_vsid_RW; /* 0x1118 */
+#define SLB_VSID_SUPERVISOR_STATE (0x1ull << 11)
+#define SLB_VSID_SUPERVISOR_STATE_MASK (0x1ull << 11)
+#define SLB_VSID_PROBLEM_STATE (0x1ull << 10)
+#define SLB_VSID_PROBLEM_STATE_MASK (0x1ull << 10)
+#define SLB_VSID_EXECUTE_SEGMENT (0x1ull << 9)
+#define SLB_VSID_NO_EXECUTE_SEGMENT (0x1ull << 9)
+#define SLB_VSID_EXECUTE_SEGMENT_MASK (0x1ull << 9)
+#define SLB_VSID_4K_PAGE (0x0 << 8)
+#define SLB_VSID_LARGE_PAGE (0x1ull << 8)
+#define SLB_VSID_PAGE_SIZE_MASK (0x1ull << 8)
+#define SLB_VSID_CLASS_MASK (0x1ull << 7)
+#define SLB_VSID_VIRTUAL_PAGE_SIZE_MASK (0x1ull << 6)
+ u64 slb_invalidate_entry_W; /* 0x1120 */
+ u64 slb_invalidate_all_W; /* 0x1128 */
+ u8 pad_0x1130_0x2000[0x2000 - 0x1130]; /* 0x1130 */
+
+ /* Context Save / Restore Area */
+ struct MFC_cq_sr spuq[16]; /* 0x2000 */
+ struct MFC_cq_sr puq[8]; /* 0x2200 */
+ u8 pad_0x2300_0x3000[0x3000 - 0x2300]; /* 0x2300 */
+
+ /* MFC Control */
+ u64 mfc_control_RW; /* 0x3000 */
+#define MFC_CNTL_RESUME_DMA_QUEUE (0ull << 0)
+#define MFC_CNTL_SUSPEND_DMA_QUEUE (1ull << 0)
+#define MFC_CNTL_SUSPEND_DMA_QUEUE_MASK (1ull << 0)
+#define MFC_CNTL_NORMAL_DMA_QUEUE_OPERATION (0ull << 8)
+#define MFC_CNTL_SUSPEND_IN_PROGRESS (1ull << 8)
+#define MFC_CNTL_SUSPEND_COMPLETE (3ull << 8)
+#define MFC_CNTL_SUSPEND_DMA_STATUS_MASK (3ull << 8)
+#define MFC_CNTL_DMA_QUEUES_EMPTY (1ull << 14)
+#define MFC_CNTL_DMA_QUEUES_EMPTY_MASK (1ull << 14)
+#define MFC_CNTL_PURGE_DMA_REQUEST (1ull << 15)
+#define MFC_CNTL_PURGE_DMA_IN_PROGRESS (1ull << 24)
+#define MFC_CNTL_PURGE_DMA_COMPLETE (3ull << 24)
+#define MFC_CNTL_PURGE_DMA_STATUS_MASK (3ull << 24)
+#define MFC_CNTL_RESTART_DMA_COMMAND (1ull << 32)
+#define MFC_CNTL_DMA_COMMAND_REISSUE_PENDING (1ull << 32)
+#define MFC_CNTL_DMA_COMMAND_REISSUE_STATUS_MASK (1ull << 32)
+#define MFC_CNTL_MFC_PRIVILEGE_STATE (2ull << 33)
+#define MFC_CNTL_MFC_PROBLEM_STATE (3ull << 33)
+#define MFC_CNTL_MFC_KEY_PROTECTION_STATE_MASK (3ull << 33)
+#define MFC_CNTL_DECREMENTER_HALTED (1ull << 35)
+#define MFC_CNTL_DECREMENTER_RUNNING (1ull << 40)
+#define MFC_CNTL_DECREMENTER_STATUS_MASK (1ull << 40)
+ u8 pad_0x3008_0x4000[0x4000 - 0x3008]; /* 0x3008 */
+
+ /* Interrupt Mailbox */
+ u64 puint_mb_R; /* 0x4000 */
+ u8 pad_0x4008_0x4040[0x4040 - 0x4008]; /* 0x4008 */
+
+ /* SPU Control */
+ u64 spu_privcntl_RW; /* 0x4040 */
+#define SPU_PRIVCNTL_MODE_NORMAL (0x0ull << 0)
+#define SPU_PRIVCNTL_MODE_SINGLE_STEP (0x1ull << 0)
+#define SPU_PRIVCNTL_MODE_MASK (0x1ull << 0)
+#define SPU_PRIVCNTL_NO_ATTENTION_EVENT (0x0ull << 1)
+#define SPU_PRIVCNTL_ATTENTION_EVENT (0x1ull << 1)
+#define SPU_PRIVCNTL_ATTENTION_EVENT_MASK (0x1ull << 1)
+#define SPU_PRIVCNT_LOAD_REQUEST_NORMAL (0x0ull << 2)
+#define SPU_PRIVCNT_LOAD_REQUEST_ENABLE_MASK (0x1ull << 2)
+ u8 pad_0x4048_0x4058[0x10]; /* 0x4048 */
+ u64 spu_lslr_RW; /* 0x4058 */
+ u64 spu_chnlcntptr_RW; /* 0x4060 */
+ u64 spu_chnlcnt_RW; /* 0x4068 */
+ u64 spu_chnldata_RW; /* 0x4070 */
+ u64 spu_cfg_RW; /* 0x4078 */
+ u8 pad_0x4080_0x5000[0x5000 - 0x4080]; /* 0x4080 */
+
+ /* PV2_ImplRegs: Implementation-specific privileged-state 2 regs */
+ u64 spu_pm_trace_tag_status_RW; /* 0x5000 */
+ u64 spu_tag_status_query_RW; /* 0x5008 */
+#define TAG_STATUS_QUERY_CONDITION_BITS (0x3ull << 32)
+#define TAG_STATUS_QUERY_MASK_BITS (0xffffffffull)
+ u64 spu_cmd_buf1_RW; /* 0x5010 */
+#define SPU_COMMAND_BUFFER_1_LSA_BITS (0x7ffffull << 32)
+#define SPU_COMMAND_BUFFER_1_EAH_BITS (0xffffffffull)
+ u64 spu_cmd_buf2_RW; /* 0x5018 */
+#define SPU_COMMAND_BUFFER_2_EAL_BITS ((0xffffffffull) << 32)
+#define SPU_COMMAND_BUFFER_2_TS_BITS (0xffffull << 16)
+#define SPU_COMMAND_BUFFER_2_TAG_BITS (0x3full)
+ u64 spu_atomic_status_RW; /* 0x5020 */
+} __attribute__ ((aligned(0x20000)));
+
+/* SPU Privilege 1 State Area */
+struct spu_priv1 {
+ /* Control and Configuration Area */
+ u64 mfc_sr1_RW; /* 0x000 */
+#define MFC_STATE1_LOCAL_STORAGE_DECODE_MASK 0x01ull
+#define MFC_STATE1_BUS_TLBIE_MASK 0x02ull
+#define MFC_STATE1_REAL_MODE_OFFSET_ENABLE_MASK 0x04ull
+#define MFC_STATE1_PROBLEM_STATE_MASK 0x08ull
+#define MFC_STATE1_RELOCATE_MASK 0x10ull
+#define MFC_STATE1_MASTER_RUN_CONTROL_MASK 0x20ull
+ u64 mfc_lpid_RW; /* 0x008 */
+ u64 spu_idr_RW; /* 0x010 */
+ u64 mfc_vr_RO; /* 0x018 */
+#define MFC_VERSION_BITS (0xffff << 16)
+#define MFC_REVISION_BITS (0xffff)
+#define MFC_GET_VERSION_BITS(vr) (((vr) & MFC_VERSION_BITS) >> 16)
+#define MFC_GET_REVISION_BITS(vr) ((vr) & MFC_REVISION_BITS)
+ u64 spu_vr_RO; /* 0x020 */
+#define SPU_VERSION_BITS (0xffff << 16)
+#define SPU_REVISION_BITS (0xffff)
+#define SPU_GET_VERSION_BITS(vr) (vr & SPU_VERSION_BITS) >> 16
+#define SPU_GET_REVISION_BITS(vr) (vr & SPU_REVISION_BITS)
+ u8 pad_0x28_0x100[0x100 - 0x28]; /* 0x28 */
+
+
+ /* Interrupt Area */
+ u64 int_mask_class0_RW; /* 0x100 */
+#define CLASS0_ENABLE_DMA_ALIGNMENT_INTR 0x1L
+#define CLASS0_ENABLE_INVALID_DMA_COMMAND_INTR 0x2L
+#define CLASS0_ENABLE_SPU_ERROR_INTR 0x4L
+#define CLASS0_ENABLE_MFC_FIR_INTR 0x8L
+ u64 int_mask_class1_RW; /* 0x108 */
+#define CLASS1_ENABLE_SEGMENT_FAULT_INTR 0x1L
+#define CLASS1_ENABLE_STORAGE_FAULT_INTR 0x2L
+#define CLASS1_ENABLE_LS_COMPARE_SUSPEND_ON_GET_INTR 0x4L
+#define CLASS1_ENABLE_LS_COMPARE_SUSPEND_ON_PUT_INTR 0x8L
+ u64 int_mask_class2_RW; /* 0x110 */
+#define CLASS2_ENABLE_MAILBOX_INTR 0x1L
+#define CLASS2_ENABLE_SPU_STOP_INTR 0x2L
+#define CLASS2_ENABLE_SPU_HALT_INTR 0x4L
+#define CLASS2_ENABLE_SPU_DMA_TAG_GROUP_COMPLETE_INTR 0x8L
+ u8 pad_0x118_0x140[0x28]; /* 0x118 */
+ u64 int_stat_class0_RW; /* 0x140 */
+ u64 int_stat_class1_RW; /* 0x148 */
+ u64 int_stat_class2_RW; /* 0x150 */
+ u8 pad_0x158_0x180[0x28]; /* 0x158 */
+ u64 int_route_RW; /* 0x180 */
+
+ /* Interrupt Routing */
+ u8 pad_0x188_0x200[0x200 - 0x188]; /* 0x188 */
+
+ /* Atomic Unit Control Area */
+ u64 mfc_atomic_flush_RW; /* 0x200 */
+#define mfc_atomic_flush_enable 0x1L
+ u8 pad_0x208_0x280[0x78]; /* 0x208 */
+ u64 resource_allocation_groupID_RW; /* 0x280 */
+ u64 resource_allocation_enable_RW; /* 0x288 */
+ u8 pad_0x290_0x380[0x380 - 0x290]; /* 0x290 */
+
+ /* MFC Fault Isolation Area */
+ /* mfc_fir_R: MFC Fault Isolation Register.
+ * mfc_fir_status_or_W: MFC Fault Isolation Status OR Register.
+ * mfc_fir_status_and_W: MFC Fault Isolation Status AND Register.
+ * mfc_fir_mask_R: MFC FIR Mask Register.
+ * mfc_fir_mask_or_W: MFC FIR Mask OR Register.
+ * mfc_fir_mask_and_W: MFC FIR Mask AND Register.
+ * mfc_fir_chkstp_enable_W: MFC FIR Checkstop Enable Register.
+ */
+ u64 mfc_fir_R; /* 0x380 */
+ u64 mfc_fir_status_or_W; /* 0x388 */
+ u64 mfc_fir_status_and_W; /* 0x390 */
+ u64 mfc_fir_mask_R; /* 0x398 */
+ u64 mfc_fir_mask_or_W; /* 0x3a0 */
+ u64 mfc_fir_mask_and_W; /* 0x3a8 */
+ u64 mfc_fir_chkstp_enable_RW; /* 0x3b0 */
+ u8 pad_0x3b8_0x3c8[0x3c8 - 0x3b8]; /* 0x3b8 */
+
+ /* SPU_Cache_ImplRegs: Implementation-dependent cache registers */
+
+ u64 smf_sbi_signal_sel; /* 0x3c8 */
+#define smf_sbi_mask_lsb 56
+#define smf_sbi_shift (63 - smf_sbi_mask_lsb)
+#define smf_sbi_mask (0x301LL << smf_sbi_shift)
+#define smf_sbi_bus0_bits (0x001LL << smf_sbi_shift)
+#define smf_sbi_bus2_bits (0x100LL << smf_sbi_shift)
+#define smf_sbi2_bus0_bits (0x201LL << smf_sbi_shift)
+#define smf_sbi2_bus2_bits (0x300LL << smf_sbi_shift)
+ u64 smf_ato_signal_sel; /* 0x3d0 */
+#define smf_ato_mask_lsb 35
+#define smf_ato_shift (63 - smf_ato_mask_lsb)
+#define smf_ato_mask (0x3LL << smf_ato_shift)
+#define smf_ato_bus0_bits (0x2LL << smf_ato_shift)
+#define smf_ato_bus2_bits (0x1LL << smf_ato_shift)
+ u8 pad_0x3d8_0x400[0x400 - 0x3d8]; /* 0x3d8 */
+
+ /* TLB Management Registers */
+ u64 mfc_sdr_RW; /* 0x400 */
+ u8 pad_0x408_0x500[0xf8]; /* 0x408 */
+ u64 tlb_index_hint_RO; /* 0x500 */
+ u64 tlb_index_W; /* 0x508 */
+ u64 tlb_vpn_RW; /* 0x510 */
+ u64 tlb_rpn_RW; /* 0x518 */
+ u8 pad_0x520_0x540[0x20]; /* 0x520 */
+ u64 tlb_invalidate_entry_W; /* 0x540 */
+ u64 tlb_invalidate_all_W; /* 0x548 */
+ u8 pad_0x550_0x580[0x580 - 0x550]; /* 0x550 */
+
+ /* SPU_MMU_ImplRegs: Implementation-dependent MMU registers */
+ u64 smm_hid; /* 0x580 */
+#define PAGE_SIZE_MASK 0xf000000000000000ull
+#define PAGE_SIZE_16MB_64KB 0x2000000000000000ull
+ u8 pad_0x588_0x600[0x600 - 0x588]; /* 0x588 */
+
+ /* MFC Status/Control Area */
+ u64 mfc_accr_RW; /* 0x600 */
+#define MFC_ACCR_EA_ACCESS_GET (1 << 0)
+#define MFC_ACCR_EA_ACCESS_PUT (1 << 1)
+#define MFC_ACCR_LS_ACCESS_GET (1 << 3)
+#define MFC_ACCR_LS_ACCESS_PUT (1 << 4)
+ u8 pad_0x608_0x610[0x8]; /* 0x608 */
+ u64 mfc_dsisr_RW; /* 0x610 */
+#define MFC_DSISR_PTE_NOT_FOUND (1 << 30)
+#define MFC_DSISR_ACCESS_DENIED (1 << 27)
+#define MFC_DSISR_ATOMIC (1 << 26)
+#define MFC_DSISR_ACCESS_PUT (1 << 25)
+#define MFC_DSISR_ADDR_MATCH (1 << 22)
+#define MFC_DSISR_LS (1 << 17)
+#define MFC_DSISR_L (1 << 16)
+#define MFC_DSISR_ADDRESS_OVERFLOW (1 << 0)
+ u8 pad_0x618_0x620[0x8]; /* 0x618 */
+ u64 mfc_dar_RW; /* 0x620 */
+ u8 pad_0x628_0x700[0x700 - 0x628]; /* 0x628 */
+
+ /* Replacement Management Table (RMT) Area */
+ u64 rmt_index_RW; /* 0x700 */
+ u8 pad_0x708_0x710[0x8]; /* 0x708 */
+ u64 rmt_data1_RW; /* 0x710 */
+ u8 pad_0x718_0x800[0x800 - 0x718]; /* 0x718 */
+
+ /* Control/Configuration Registers */
+ u64 mfc_dsir_R; /* 0x800 */
+#define MFC_DSIR_Q (1 << 31)
+#define MFC_DSIR_SPU_QUEUE MFC_DSIR_Q
+ u64 mfc_lsacr_RW; /* 0x808 */
+#define MFC_LSACR_COMPARE_MASK ((~0ull) << 32)
+#define MFC_LSACR_COMPARE_ADDR ((~0ull) >> 32)
+ u64 mfc_lscrr_R; /* 0x810 */
+#define MFC_LSCRR_Q (1 << 31)
+#define MFC_LSCRR_SPU_QUEUE MFC_LSCRR_Q
+#define MFC_LSCRR_QI_SHIFT 32
+#define MFC_LSCRR_QI_MASK ((~0ull) << MFC_LSCRR_QI_SHIFT)
+ u8 pad_0x818_0x900[0x900 - 0x818]; /* 0x818 */
+
+ /* Real Mode Support Registers */
+ u64 mfc_rm_boundary; /* 0x900 */
+ u8 pad_0x908_0x938[0x30]; /* 0x908 */
+ u64 smf_dma_signal_sel; /* 0x938 */
+#define mfc_dma1_mask_lsb 41
+#define mfc_dma1_shift (63 - mfc_dma1_mask_lsb)
+#define mfc_dma1_mask (0x3LL << mfc_dma1_shift)
+#define mfc_dma1_bits (0x1LL << mfc_dma1_shift)
+#define mfc_dma2_mask_lsb 43
+#define mfc_dma2_shift (63 - mfc_dma2_mask_lsb)
+#define mfc_dma2_mask (0x3LL << mfc_dma2_shift)
+#define mfc_dma2_bits (0x1LL << mfc_dma2_shift)
+ u8 pad_0x940_0xa38[0xf8]; /* 0x940 */
+ u64 smm_signal_sel; /* 0xa38 */
+#define smm_sig_mask_lsb 12
+#define smm_sig_shift (63 - smm_sig_mask_lsb)
+#define smm_sig_mask (0x3LL << smm_sig_shift)
+#define smm_sig_bus0_bits (0x2LL << smm_sig_shift)
+#define smm_sig_bus2_bits (0x1LL << smm_sig_shift)
+ u8 pad_0xa40_0xc00[0xc00 - 0xa40]; /* 0xa40 */
+
+ /* DMA Command Error Area */
+ u64 mfc_cer_R; /* 0xc00 */
+#define MFC_CER_Q (1 << 31)
+#define MFC_CER_SPU_QUEUE MFC_CER_Q
+ u8 pad_0xc08_0x1000[0x1000 - 0xc08]; /* 0xc08 */
+
+ /* PV1_ImplRegs: Implementation-dependent privileged-state 1 regs */
+ /* DMA Command Error Area */
+ u64 spu_ecc_cntl_RW; /* 0x1000 */
+#define SPU_ECC_CNTL_E (1ull << 0ull)
+#define SPU_ECC_CNTL_ENABLE SPU_ECC_CNTL_E
+#define SPU_ECC_CNTL_DISABLE (~SPU_ECC_CNTL_E & 1L)
+#define SPU_ECC_CNTL_S (1ull << 1ull)
+#define SPU_ECC_STOP_AFTER_ERROR SPU_ECC_CNTL_S
+#define SPU_ECC_CONTINUE_AFTER_ERROR (~SPU_ECC_CNTL_S & 2L)
+#define SPU_ECC_CNTL_B (1ull << 2ull)
+#define SPU_ECC_BACKGROUND_ENABLE SPU_ECC_CNTL_B
+#define SPU_ECC_BACKGROUND_DISABLE (~SPU_ECC_CNTL_B & 4L)
+#define SPU_ECC_CNTL_I_SHIFT 3ull
+#define SPU_ECC_CNTL_I_MASK (3ull << SPU_ECC_CNTL_I_SHIFT)
+#define SPU_ECC_WRITE_ALWAYS (~SPU_ECC_CNTL_I & 12L)
+#define SPU_ECC_WRITE_CORRECTABLE (1ull << SPU_ECC_CNTL_I_SHIFT)
+#define SPU_ECC_WRITE_UNCORRECTABLE (3ull << SPU_ECC_CNTL_I_SHIFT)
+#define SPU_ECC_CNTL_D (1ull << 5ull)
+#define SPU_ECC_DETECTION_ENABLE SPU_ECC_CNTL_D
+#define SPU_ECC_DETECTION_DISABLE (~SPU_ECC_CNTL_D & 32L)
+ u64 spu_ecc_stat_RW; /* 0x1008 */
+#define SPU_ECC_CORRECTED_ERROR (1ull << 0ul)
+#define SPU_ECC_UNCORRECTED_ERROR (1ull << 1ul)
+#define SPU_ECC_SCRUB_COMPLETE (1ull << 2ul)
+#define SPU_ECC_SCRUB_IN_PROGRESS (1ull << 3ul)
+#define SPU_ECC_INSTRUCTION_ERROR (1ull << 4ul)
+#define SPU_ECC_DATA_ERROR (1ull << 5ul)
+#define SPU_ECC_DMA_ERROR (1ull << 6ul)
+#define SPU_ECC_STATUS_CNT_MASK (256ull << 8)
+ u64 spu_ecc_addr_RW; /* 0x1010 */
+ u64 spu_err_mask_RW; /* 0x1018 */
+#define SPU_ERR_ILLEGAL_INSTR (1ull << 0ul)
+#define SPU_ERR_ILLEGAL_CHANNEL (1ull << 1ul)
+ u8 pad_0x1020_0x1028[0x1028 - 0x1020]; /* 0x1020 */
+
+ /* SPU Debug-Trace Bus (DTB) Selection Registers */
+ u64 spu_trig0_sel; /* 0x1028 */
+ u64 spu_trig1_sel; /* 0x1030 */
+ u64 spu_trig2_sel; /* 0x1038 */
+ u64 spu_trig3_sel; /* 0x1040 */
+ u64 spu_trace_sel; /* 0x1048 */
+#define spu_trace_sel_mask 0x1f1fLL
+#define spu_trace_sel_bus0_bits 0x1000LL
+#define spu_trace_sel_bus2_bits 0x0010LL
+ u64 spu_event0_sel; /* 0x1050 */
+ u64 spu_event1_sel; /* 0x1058 */
+ u64 spu_event2_sel; /* 0x1060 */
+ u64 spu_event3_sel; /* 0x1068 */
+ u64 spu_trace_cntl; /* 0x1070 */
+} __attribute__ ((aligned(0x2000)));
+
+#endif
--- linux-2.6-ppc.orig/mm/memory.c 2005-04-01 12:39:56.630979688 -0500
+++ linux-2.6-ppc/mm/memory.c 2005-04-01 12:53:32.111951736 -0500
@@ -2108,6 +2108,7 @@ unsigned long vmalloc_to_pfn(void * vmal
{
return page_to_pfn(vmalloc_to_page(vmalloc_addr));
}
+EXPORT_SYMBOL_GPL(handle_mm_fault);
EXPORT_SYMBOL(vmalloc_to_pfn);
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH 3/4] ppc64: Add driver for BPA iommu
2005-04-28 7:59 ` [PATCH 3/4] ppc64: Add driver for BPA iommu Arnd Bergmann
@ 2005-04-28 14:05 ` Olof Johansson
2005-04-28 14:30 ` Olof Johansson
2005-04-29 4:35 ` Arnd Bergmann
0 siblings, 2 replies; 15+ messages in thread
From: Olof Johansson @ 2005-04-28 14:05 UTC (permalink / raw)
To: Arnd Bergmann
Cc: linuxppc64-dev, Paul Mackerras, linux-kernel, Anton Blanchard
Hi,
Some comments below.
On Thu, Apr 28, 2005 at 09:59:26AM +0200, Arnd Bergmann wrote:
> Index: linus-2.5/arch/ppc64/kernel/bpa_iommu.c
> ===================================================================
> --- /dev/null 1970-01-01 00:00:00.000000000 +0000
> +++ linus-2.5/arch/ppc64/kernel/bpa_iommu.c 2005-04-22 07:01:39.000000000 +0200
> @@ -0,0 +1,433 @@
> +/* some constants */
> +enum {
> + /* segment table entries */
[...]
> +};
Hmm. I thought the benefit of enum was to be able to do type checking
later on if it's a typed enum. Here you mix different definitions in
the same large untyped enum declaration. Can they be moved to a
bpa_iommu.h file and #defined instead?
> +/* cause link error for invalid use */
> +extern unsigned long __ioc_invalid_page_size;
[...]
> + default: /* not a known compile time constant */
> + ps = __ioc_invalid_page_size;
> + break;
> + }
Why do we need to detect this at link time?
> + nnpt++; /* XXX is this right? */
Well, does it work? :-)
> + return (ioste) {
> + .val = IOST_VALID_MASK
> + | (iostep & IOST_PT_BASE_MASK)
> + | ((nnpt << 5) & IOST_NNPT_MASK)
> + | (ps & IOST_PS_MASK)
> + };
Can you create a mk_ioste() inline instead of doing this construct?
> +static inline unsigned long
> +get_ioptep(ioste iost_entry, unsigned long io_address)
> +{
> + unsigned long iopt_base;
> + unsigned long ps;
> + unsigned long iopt_offset;
> +
> + iopt_base = iost_entry.val & IOST_PT_BASE_MASK;
> + ps = iost_entry.val & IOST_PS_MASK;
> +
> + iopt_offset = ((io_address & 0x0fffffff) >> (7 + 2 * ps)) & 0x7fff8ul;
Magic. Can we get it explained either by defines instead of constants
or by a comment?
> +/* compute the hashed 6 bit index for the 4-way associative pte cache */
> +static inline unsigned long
> +get_ioc_hash(ioste iost_entry, unsigned long io_address)
> +{
> + unsigned long iopte = get_ioptep(iost_entry, io_address);
> +
> + return ((iopte & 0x000000000000001f8ul) >> 3)
> + ^ ((iopte & 0x00000000000020000ul) >> 17)
> + ^ ((iopte & 0x00000000000010000ul) >> 15)
> + ^ ((iopte & 0x00000000000008000ul) >> 13)
> + ^ ((iopte & 0x00000000000004000ul) >> 11)
> + ^ ((iopte & 0x00000000000002000ul) >> 9)
> + ^ ((iopte & 0x00000000000001000ul) >> 7);
Can't you reverse the subword by just doing one XOR instead of 6?
That's what I did for the ext2 bitops on ppc64. See
http://www.ussg.iu.edu/hypermail/linux/kernel/0408.2/1321.html
> +static inline ioste
> +get_iost_cache(void __iomem *base, unsigned long index)
> +{
> + unsigned long __iomem *p = (base + IOC_ST_CACHE_DIR);
> + return (ioste) { in_be64(&p[index]) };
mk_ioste() would be nice here too.
> +#ifdef __KERNEL__
Are we ever not __KERNEL__?
> +/* initialize the iommu to support a simple linear mapping */
> +static void bpa_map_iommu(void)
> +{
[...]
> + for (address = 0; address < 0x100000000ul; address += io_page_size) {
This looks like way more than the 512MB DMA window you mentioned in the
beginning.
-Olof
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH 3/4] ppc64: Add driver for BPA iommu
2005-04-28 14:05 ` Olof Johansson
@ 2005-04-28 14:30 ` Olof Johansson
2005-04-29 4:35 ` Arnd Bergmann
1 sibling, 0 replies; 15+ messages in thread
From: Olof Johansson @ 2005-04-28 14:30 UTC (permalink / raw)
To: Arnd Bergmann
Cc: linuxppc64-dev, Paul Mackerras, linux-kernel, Anton Blanchard
On Thu, Apr 28, 2005 at 09:05:58AM -0500, Olof Johansson wrote:
> > +/* compute the hashed 6 bit index for the 4-way associative pte cache */
> > +static inline unsigned long
> > +get_ioc_hash(ioste iost_entry, unsigned long io_address)
> > +{
> > + unsigned long iopte = get_ioptep(iost_entry, io_address);
> > +
> > + return ((iopte & 0x000000000000001f8ul) >> 3)
> > + ^ ((iopte & 0x00000000000020000ul) >> 17)
> > + ^ ((iopte & 0x00000000000010000ul) >> 15)
> > + ^ ((iopte & 0x00000000000008000ul) >> 13)
> > + ^ ((iopte & 0x00000000000004000ul) >> 11)
> > + ^ ((iopte & 0x00000000000002000ul) >> 9)
> > + ^ ((iopte & 0x00000000000001000ul) >> 7);
>
> Can't you reverse the subword by just doing one XOR instead of 6?
Ugh, I wrote that before I had coffee. No you can't, you can just negate
the value by doing the XOR. Nevermind.
-Olof
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH 0/4] ppc64: Introduce BPA platform
2005-04-28 7:54 [PATCH 0/4] ppc64: Introduce BPA platform Arnd Bergmann
` (3 preceding siblings ...)
2005-04-28 8:00 ` [PATCH 4/4] ppc64: Add SPU file system Arnd Bergmann
@ 2005-04-28 14:44 ` Sonny Rao
2005-04-29 4:35 ` Arnd Bergmann
4 siblings, 1 reply; 15+ messages in thread
From: Sonny Rao @ 2005-04-28 14:44 UTC (permalink / raw)
To: Arnd Bergmann
Cc: linuxppc64-dev, linux-kernel, Paul Mackerras, Anton Blanchard
On Thu, Apr 28, 2005 at 09:54:00AM +0200, Arnd Bergmann wrote:
> This series of patches add support for a fifth platform type in the
> ppc64 architecture tree. The Broadband Processor Architecture (BPA)
> is currently used in a single machine from IBM, with others likely
> to be added at a later point.
>
> I already sent preparation patches before, these need to be applied
> on top of them.
> The first three patches add the actual platform code, which should
> be usable for any BPA compatible implementation.
>
> The final patch introduces a new file system to make use of the
> SPUs inside the processors. This patch is still in a prototype stage
> and not intended for merging yet.
>
> Arnd <><
Is BPA the same thing (architecture) as the STI Cell Processor?
Sonny
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH 0/4] ppc64: Introduce BPA platform
2005-04-28 14:44 ` [PATCH 0/4] ppc64: Introduce BPA platform Sonny Rao
@ 2005-04-29 4:35 ` Arnd Bergmann
0 siblings, 0 replies; 15+ messages in thread
From: Arnd Bergmann @ 2005-04-29 4:35 UTC (permalink / raw)
To: Sonny Rao; +Cc: linuxppc64-dev, linux-kernel, Paul Mackerras, Anton Blanchard
On Dunnersdag 28 April 2005 16:44, Sonny Rao wrote:
> Is BPA the same thing (architecture) as the STI Cell Processor?
Yes, that is it. BPA is what Cell is called in the official
specification.
Arnd <><
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH 3/4] ppc64: Add driver for BPA iommu
2005-04-28 14:05 ` Olof Johansson
2005-04-28 14:30 ` Olof Johansson
@ 2005-04-29 4:35 ` Arnd Bergmann
2005-04-29 5:36 ` Olof Johansson
1 sibling, 1 reply; 15+ messages in thread
From: Arnd Bergmann @ 2005-04-29 4:35 UTC (permalink / raw)
To: Olof Johansson
Cc: linuxppc64-dev, Paul Mackerras, linux-kernel, Anton Blanchard
On Dunnersdag 28 April 2005 16:05, Olof Johansson wrote:
> On Thu, Apr 28, 2005 at 09:59:26AM +0200, Arnd Bergmann wrote:
> > +/* some constants */
> > +enum {
> > + /* segment table entries */
> [...]
> > +};
>
> Hmm. I thought the benefit of enum was to be able to do type checking
> later on if it's a typed enum. Here you mix different definitions in
> the same large untyped enum declaration. Can they be moved to a
> bpa_iommu.h file and #defined instead?
I prefer to avoid macros altogether, and this is one of the ways to
do it. We have had the discussion about how to define constants
a few times before on lkml without reaching a conclusion.
> > +/* cause link error for invalid use */
> > +extern unsigned long __ioc_invalid_page_size;
> [...]
> > + default: /* not a known compile time constant */
> > + ps = __ioc_invalid_page_size;
> > + break;
> > + }
>
> Why do we need to detect this at link time?
I want to avoid doing BUG() or something similar, so I
try to detect a user error as early as possible.
> > + nnpt++; /* XXX is this right? */
>
> Well, does it work? :-)
Yes, but it seems to contradict the specs...
> > + return (ioste) {
> > + .val = IOST_VALID_MASK
> > + | (iostep & IOST_PT_BASE_MASK)
> > + | ((nnpt << 5) & IOST_NNPT_MASK)
> > + | (ps & IOST_PS_MASK)
> > + };
>
> Can you create a mk_ioste() inline instead of doing this construct?
ok.
> > +static inline unsigned long
> > +get_ioptep(ioste iost_entry, unsigned long io_address)
> > +{
> > + unsigned long iopt_base;
> > + unsigned long ps;
> > + unsigned long iopt_offset;
> > +
> > + iopt_base = iost_entry.val & IOST_PT_BASE_MASK;
> > + ps = iost_entry.val & IOST_PS_MASK;
> > +
> > + iopt_offset = ((io_address & 0x0fffffff) >> (7 + 2 * ps)) & 0x7fff8ul;
>
> Magic. Can we get it explained either by defines instead of constants
> or by a comment?
This comes from a graphical representation in the specs. I'll add a comment
to point to that image.
> > +static inline ioste
> > +get_iost_cache(void __iomem *base, unsigned long index)
> > +{
> > + unsigned long __iomem *p = (base + IOC_ST_CACHE_DIR);
> > + return (ioste) { in_be64(&p[index]) };
>
> mk_ioste() would be nice here too.
ok.
> > +#ifdef __KERNEL__
>
> Are we ever not __KERNEL__?
Sorry, I thought I had removed that code already. This does not belong
there.
> > +/* initialize the iommu to support a simple linear mapping */
> > +static void bpa_map_iommu(void)
> > +{
> [...]
> > + for (address = 0; address < 0x100000000ul; address += io_page_size) {
>
> This looks like way more than the 512MB DMA window you mentioned in the
> beginning.
True. This is probably a bug in the comment. The code will change as soon
as the firmware provides the correct dma-window properties.
Arnd <><
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH 3/4] ppc64: Add driver for BPA iommu
2005-04-29 4:35 ` Arnd Bergmann
@ 2005-04-29 5:36 ` Olof Johansson
2005-04-29 5:48 ` Arnd Bergmann
0 siblings, 1 reply; 15+ messages in thread
From: Olof Johansson @ 2005-04-29 5:36 UTC (permalink / raw)
To: Arnd Bergmann
Cc: linuxppc64-dev, Paul Mackerras, linux-kernel, Anton Blanchard
On Fri, Apr 29, 2005 at 06:35:43AM +0200, Arnd Bergmann wrote:
> On Dunnersdag 28 April 2005 16:05, Olof Johansson wrote:
>
> > On Thu, Apr 28, 2005 at 09:59:26AM +0200, Arnd Bergmann wrote:
> > > +/* some constants */
> > > +enum {
> > > + /* segment table entries */
> > [...]
> > > +};
> >
> > Hmm. I thought the benefit of enum was to be able to do type checking
> > later on if it's a typed enum. Here you mix different definitions in
> > the same large untyped enum declaration. Can they be moved to a
> > bpa_iommu.h file and #defined instead?
>
> I prefer to avoid macros altogether, and this is one of the ways to
> do it. We have had the discussion about how to define constants
> a few times before on lkml without reaching a conclusion.
Most of arch/ppc64/* uses #defines, for whatever that's worth. Still,
CodingStyle seems to recommend enums for "related constants", I assume
it's so they can be typed. I don't care enough either way to argue
it further.
Anyhow, enum or #define, it should be moved to bpa_iommu.h.
> > Why do we need to detect this at link time?
>
> I want to avoid doing BUG() or something similar, so I
> try to detect a user error as early as possible.
User or developer error? I thought it was a developer one, and a quite
specialized one at that. Either way, there's already a primitive that
can be used instead of making your own: BUILD_BUG_ON().
> > > + nnpt++; /* XXX is this right? */
> >
> > Well, does it work? :-)
>
> Yes, but it seems to contradict the specs...
A comment to that effect could be nice.
> > > +static inline unsigned long
> > > +get_ioptep(ioste iost_entry, unsigned long io_address)
> > > +{
> > > + unsigned long iopt_base;
> > > + unsigned long ps;
> > > + unsigned long iopt_offset;
> > > +
> > > + iopt_base = iost_entry.val & IOST_PT_BASE_MASK;
> > > + ps = iost_entry.val & IOST_PS_MASK;
> > > +
> > > + iopt_offset = ((io_address & 0x0fffffff) >> (7 + 2 * ps)) & 0x7fff8ul;
> >
> > Magic. Can we get it explained either by defines instead of constants
> > or by a comment?
>
> This comes from a graphical representation in the specs. I'll add a comment
> to point to that image.
I guess it'd be a bit much information to just add in a comment, but for
readability that's probably the best way to go. Not many people have
the specs, but on the other hand if you're messing around with this code
then chances are you have them.
I don't know what the status is for a release of public specifications,
but if they're not available then people will be looking to learn from
the implementation and the documentation around it instead.
-Olof
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH 3/4] ppc64: Add driver for BPA iommu
2005-04-29 5:36 ` Olof Johansson
@ 2005-04-29 5:48 ` Arnd Bergmann
2005-04-29 6:43 ` Benjamin Herrenschmidt
0 siblings, 1 reply; 15+ messages in thread
From: Arnd Bergmann @ 2005-04-29 5:48 UTC (permalink / raw)
To: Olof Johansson
Cc: linuxppc64-dev, Paul Mackerras, linux-kernel, Anton Blanchard
On Freedag 29 April 2005 07:36, Olof Johansson wrote:
> On Fri, Apr 29, 2005 at 06:35:43AM +0200, Arnd Bergmann wrote:
>>
> Anyhow, enum or #define, it should be moved to bpa_iommu.h.
I don't interface with any other files, so I prefer to have
everything in one file here. If there is anyone else who
agrees with you on moving this into a separate file, I don't
mind doing that.
> User or developer error? I thought it was a developer one, and a quite
> specialized one at that. Either way, there's already a primitive that
> can be used instead of making your own: BUILD_BUG_ON().
Right. I had forgotten about that, thanks.
> > Yes, but it seems to contradict the specs...
>
> A comment to that effect could be nice.
Ok, I'll change that.
> > This comes from a graphical representation in the specs. I'll add a comment
> > to point to that image.
>
> I guess it'd be a bit much information to just add in a comment, but for
> readability that's probably the best way to go. Not many people have
> the specs, but on the other hand if you're messing around with this code
> then chances are you have them.
The picture should be in the parts that we are working on getting public.
> I don't know what the status is for a release of public specifications,
> but if they're not available then people will be looking to learn from
> the implementation and the documentation around it instead.
There will be a supplement to Book 1-3 of PowerPC AS that is going to
be public. Book 4 is rarely needed and the chances of publishing that
are not as good.
Thanks,
Arnd <><
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH 3/4] ppc64: Add driver for BPA iommu
2005-04-29 5:48 ` Arnd Bergmann
@ 2005-04-29 6:43 ` Benjamin Herrenschmidt
2005-04-29 8:31 ` Arnd Bergmann
0 siblings, 1 reply; 15+ messages in thread
From: Benjamin Herrenschmidt @ 2005-04-29 6:43 UTC (permalink / raw)
To: Arnd Bergmann
Cc: Olof Johansson, linuxppc64-dev, Paul Mackerras,
Linux Kernel list, Anton Blanchard
On Fri, 2005-04-29 at 07:48 +0200, Arnd Bergmann wrote:
> On Freedag 29 April 2005 07:36, Olof Johansson wrote:
> > On Fri, Apr 29, 2005 at 06:35:43AM +0200, Arnd Bergmann wrote:
> >>
> > Anyhow, enum or #define, it should be moved to bpa_iommu.h.
>
> I don't interface with any other files, so I prefer to have
> everything in one file here. If there is anyone else who
> agrees with you on moving this into a separate file, I don't
> mind doing that.
The habit here is for such "private" .h to be next to the .c, while a
shared one goes in include/asm-* or include/linux.
Ben.
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH 3/4] ppc64: Add driver for BPA iommu
2005-04-29 6:43 ` Benjamin Herrenschmidt
@ 2005-04-29 8:31 ` Arnd Bergmann
2005-04-29 13:06 ` Paul Mackerras
0 siblings, 1 reply; 15+ messages in thread
From: Arnd Bergmann @ 2005-04-29 8:31 UTC (permalink / raw)
To: Benjamin Herrenschmidt
Cc: Olof Johansson, linuxppc64-dev, Paul Mackerras,
Linux Kernel list, Anton Blanchard
On Freedag 29 April 2005 08:43, Benjamin Herrenschmidt wrote:
> The habit here is for such "private" .h to be next to the .c, while a
> shared one goes in include/asm-* or include/linux.
Ok, here comes an updated version, which should integrate changes for
all comments I got so far.
Implementation of software load support for the BE iommu. This is very
different from other iommu code on ppc64, since we only do a static mapping.
The mapping is currently hardcoded but should really be read from the
firmware, but they don't set up the device nodes yet.
Software load is ok as long as the DMA windows all fit below 4GB.
Currently, there is a single 512MB DMA window for PCI, USB and
ethernet at 0x20000000 for our RAM. No machine we have has more
than 512 MB anyway, but we might want to change the firmware to use
separate DMA windows for each device.
Signed-off-by: Arnd Bergmann <arndb@de.ibm.com>
Index: linus-2.5/arch/ppc64/kernel/Makefile
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/Makefile 2005-04-22 07:01:07.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/Makefile 2005-04-29 10:01:44.000000000 +0200
@@ -34,7 +34,8 @@
pSeries_nvram.o rtasd.o ras.o pSeries_reconfig.o \
pSeries_setup.o pSeries_iommu.o
-obj-$(CONFIG_PPC_BPA) += bpa_setup.o bpa_nvram.o bpa_iic.o spider-pic.o
+obj-$(CONFIG_PPC_BPA) += bpa_setup.o bpa_iommu.o bpa_nvram.o \
+ bpa_iic.o spider-pic.o
obj-$(CONFIG_EEH) += eeh.o
obj-$(CONFIG_PROC_FS) += proc_ppc64.o
Index: linus-2.5/arch/ppc64/kernel/bpa_iommu.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linus-2.5/arch/ppc64/kernel/bpa_iommu.c 2005-04-29 10:24:03.000000000 +0200
@@ -0,0 +1,377 @@
+/*
+ * IOMMU implementation for Broadband Processor Architecture
+ * We just establish a linear mapping at boot by setting all the
+ * IOPT cache entries in the CPU.
+ * The mapping functions should be identical to pci_direct_iommu,
+ * except for the handling of the high order bit that is required
+ * by the Spider bridge. These should be split into a separate
+ * file at the point where we get a different bridge chip.
+ *
+ * Copyright (C) 2005 IBM Deutschland Entwicklung GmbH,
+ * Arnd Bergmann <arndb@de.ibm.com>
+ *
+ * Based on linear mapping
+ * Copyright (C) 2003 Benjamin Herrenschmidt (benh@kernel.crashing.org)
+ *
+ * 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.
+ */
+
+#undef DEBUG
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <linux/mm.h>
+#include <linux/dma-mapping.h>
+
+#include <asm/sections.h>
+#include <asm/iommu.h>
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/pci-bridge.h>
+#include <asm/machdep.h>
+#include <asm/pmac_feature.h>
+#include <asm/abs_addr.h>
+#include <asm/system.h>
+
+#include "pci.h"
+#include "bpa_iommu.h"
+
+static inline unsigned long
+get_iopt_entry(unsigned long real_address, unsigned long ioid,
+ unsigned long prot)
+{
+ return (prot & IOPT_PROT_MASK)
+ | (IOPT_COHERENT)
+ | (IOPT_ORDER_VC)
+ | (real_address & IOPT_RPN_MASK)
+ | (ioid & IOPT_IOID_MASK);
+}
+
+typedef struct {
+ unsigned long val;
+} ioste;
+
+static inline ioste
+mk_ioste(unsigned long val)
+{
+ ioste ioste = { .val = val, };
+ return ioste;
+}
+
+static inline ioste
+get_iost_entry(unsigned long iopt_base, unsigned long io_address, unsigned page_size)
+{
+ unsigned long ps;
+ unsigned long iostep;
+ unsigned long nnpt;
+ unsigned long shift;
+
+ switch (page_size) {
+ case 0x1000000:
+ ps = IOST_PS_16M;
+ nnpt = 0; /* one page per segment */
+ shift = 5; /* segment has 16 iopt entries */
+ break;
+
+ case 0x100000:
+ ps = IOST_PS_1M;
+ nnpt = 0; /* one page per segment */
+ shift = 1; /* segment has 256 iopt entries */
+ break;
+
+ case 0x10000:
+ ps = IOST_PS_64K;
+ nnpt = 0x07; /* 8 pages per io page table */
+ shift = 0; /* all entries are used */
+ break;
+
+ case 0x1000:
+ ps = IOST_PS_4K;
+ nnpt = 0x7f; /* 128 pages per io page table */
+ shift = 0; /* all entries are used */
+ break;
+
+ default: /* not a known compile time constant */
+ BUILD_BUG_ON(1);
+ break;
+ }
+
+ iostep = iopt_base +
+ /* need 8 bytes per iopte */
+ (((io_address / page_size * 8)
+ /* align io page tables on 4k page boundaries */
+ << shift)
+ /* nnpt+1 pages go into each iopt */
+ & ~(nnpt << 12));
+
+ nnpt++; /* this seems to work, but the documentation is not clear
+ about wether we put nnpt or nnpt-1 into the ioste bits.
+ In theory, this can't work for 4k pages. */
+ return mk_ioste(IOST_VALID_MASK
+ | (iostep & IOST_PT_BASE_MASK)
+ | ((nnpt << 5) & IOST_NNPT_MASK)
+ | (ps & IOST_PS_MASK));
+}
+
+/* compute the address of an io pte */
+static inline unsigned long
+get_ioptep(ioste iost_entry, unsigned long io_address)
+{
+ unsigned long iopt_base;
+ unsigned long page_size;
+ unsigned long page_number;
+ unsigned long iopt_offset;
+
+ iopt_base = iost_entry.val & IOST_PT_BASE_MASK;
+ page_size = iost_entry.val & IOST_PS_MASK;
+
+ /* decode page size to compute page number */
+ page_number = (io_address & 0x0fffffff) >> (10 + 2 * page_size);
+ /* page number is an offset into the io page table */
+ iopt_offset = (page_number << 3) & 0x7fff8ul;
+ return iopt_base + iopt_offset;
+}
+
+/* compute the tag field of the iopt cache entry */
+static inline unsigned long
+get_ioc_tag(ioste iost_entry, unsigned long io_address)
+{
+ unsigned long iopte = get_ioptep(iost_entry, io_address);
+
+ return IOPT_VALID_MASK
+ | ((iopte & 0x00000000000000ff8ul) >> 3)
+ | ((iopte & 0x0000003fffffc0000ul) >> 9);
+}
+
+/* compute the hashed 6 bit index for the 4-way associative pte cache */
+static inline unsigned long
+get_ioc_hash(ioste iost_entry, unsigned long io_address)
+{
+ unsigned long iopte = get_ioptep(iost_entry, io_address);
+
+ return ((iopte & 0x000000000000001f8ul) >> 3)
+ ^ ((iopte & 0x00000000000020000ul) >> 17)
+ ^ ((iopte & 0x00000000000010000ul) >> 15)
+ ^ ((iopte & 0x00000000000008000ul) >> 13)
+ ^ ((iopte & 0x00000000000004000ul) >> 11)
+ ^ ((iopte & 0x00000000000002000ul) >> 9)
+ ^ ((iopte & 0x00000000000001000ul) >> 7);
+}
+
+/* same as above, but pretend that we have a simpler 1-way associative
+ pte cache with an 8 bit index */
+static inline unsigned long
+get_ioc_hash_1way(ioste iost_entry, unsigned long io_address)
+{
+ unsigned long iopte = get_ioptep(iost_entry, io_address);
+
+ return ((iopte & 0x000000000000001f8ul) >> 3)
+ ^ ((iopte & 0x00000000000020000ul) >> 17)
+ ^ ((iopte & 0x00000000000010000ul) >> 15)
+ ^ ((iopte & 0x00000000000008000ul) >> 13)
+ ^ ((iopte & 0x00000000000004000ul) >> 11)
+ ^ ((iopte & 0x00000000000002000ul) >> 9)
+ ^ ((iopte & 0x00000000000001000ul) >> 7)
+ ^ ((iopte & 0x0000000000000c000ul) >> 8);
+}
+
+static inline ioste
+get_iost_cache(void __iomem *base, unsigned long index)
+{
+ unsigned long __iomem *p = (base + IOC_ST_CACHE_DIR);
+ return mk_ioste(in_be64(&p[index]));
+}
+
+static inline void
+set_iost_cache(void __iomem *base, unsigned long index, ioste ste)
+{
+ unsigned long __iomem *p = (base + IOC_ST_CACHE_DIR);
+ pr_debug("ioste %02lx was %016lx, store %016lx", index,
+ get_iost_cache(base, index).val, ste.val);
+ out_be64(&p[index], ste.val);
+ pr_debug(" now %016lx\n", get_iost_cache(base, index).val);
+}
+
+static inline unsigned long
+get_iopt_cache(void __iomem *base, unsigned long index, unsigned long *tag)
+{
+ unsigned long __iomem *tags = (void *)(base + IOC_PT_CACHE_DIR);
+ unsigned long __iomem *p = (void *)(base + IOC_PT_CACHE_REG);
+
+ *tag = tags[index];
+ rmb();
+ return *p;
+}
+
+static inline void
+set_iopt_cache(void __iomem *base, unsigned long index,
+ unsigned long tag, unsigned long val)
+{
+ unsigned long __iomem *tags = base + IOC_PT_CACHE_DIR;
+ unsigned long __iomem *p = base + IOC_PT_CACHE_REG;
+ pr_debug("iopt %02lx was v%016lx/t%016lx, store v%016lx/t%016lx\n",
+ index, get_iopt_cache(base, index, &oldtag), oldtag, val, tag);
+
+ out_be64(p, val);
+ out_be64(&tags[index], tag);
+}
+
+static inline void
+set_iost_origin(void __iomem *base)
+{
+ unsigned long __iomem *p = base + IOC_ST_ORIGIN;
+ unsigned long origin = IOSTO_ENABLE | IOSTO_SW;
+
+ pr_debug("iost_origin %016lx, now %016lx\n", in_be64(p), origin);
+ out_be64(p, origin);
+}
+
+static inline void
+set_iocmd_config(void __iomem *base)
+{
+ unsigned long __iomem *p = base + 0xc00;
+ unsigned long conf;
+
+ conf = in_be64(p);
+ pr_debug("iost_conf %016lx, now %016lx\n", conf, conf | IOCMD_CONF_TE);
+ out_be64(p, conf | IOCMD_CONF_TE);
+}
+
+/* FIXME: get these from the device tree */
+#define ioc_base 0x20000511000ull
+#define ioc_mmio_base 0x20000510000ull
+#define ioid 0x48a
+#define iopt_phys_offset (- 0x20000000) /* We have a 512MB offset from the SB */
+#define io_page_size 0x1000000
+
+static unsigned long map_iopt_entry(unsigned long address)
+{
+ switch (address >> 20) {
+ case 0x600:
+ address = 0x24020000000ull; /* spider i/o */
+ break;
+ default:
+ address += iopt_phys_offset;
+ break;
+ }
+
+ return get_iopt_entry(address, ioid, IOPT_PROT_RW);
+}
+
+static void iommu_bus_setup_null(struct pci_bus *b) { }
+static void iommu_dev_setup_null(struct pci_dev *d) { }
+
+/* initialize the iommu to support a simple linear mapping
+ * for each DMA window used by any device. For now, we
+ * happen to know that there is only one DMA window in use,
+ * starting at iopt_phys_offset. */
+static void bpa_map_iommu(void)
+{
+ unsigned long address;
+ void __iomem *base;
+ ioste ioste;
+ unsigned long index;
+
+ base = __ioremap(ioc_base, 0x1000, _PAGE_NO_CACHE);
+ pr_debug("%lx mapped to %p\n", ioc_base, base);
+ set_iocmd_config(base);
+ iounmap(base);
+
+ base = __ioremap(ioc_mmio_base, 0x1000, _PAGE_NO_CACHE);
+ pr_debug("%lx mapped to %p\n", ioc_mmio_base, base);
+
+ set_iost_origin(base);
+
+ for (address = 0; address < 0x100000000ul; address += io_page_size) {
+ ioste = get_iost_entry(0x10000000000ul, address, io_page_size);
+ if ((address & 0xfffffff) == 0) /* segment start */
+ set_iost_cache(base, address >> 28, ioste);
+ index = get_ioc_hash_1way(ioste, address);
+ pr_debug("addr %08lx, index %02lx, ioste %016lx\n",
+ address, index, ioste.val);
+ set_iopt_cache(base,
+ get_ioc_hash_1way(ioste, address),
+ get_ioc_tag(ioste, address),
+ map_iopt_entry(address));
+ }
+ iounmap(base);
+}
+
+
+static void *bpa_alloc_coherent(struct device *hwdev, size_t size,
+ dma_addr_t *dma_handle, unsigned int __nocast flag)
+{
+ void *ret;
+
+ ret = (void *)__get_free_pages(flag, get_order(size));
+ if (ret != NULL) {
+ memset(ret, 0, size);
+ *dma_handle = virt_to_abs(ret) | BPA_DMA_VALID;
+ }
+ return ret;
+}
+
+static void bpa_free_coherent(struct device *hwdev, size_t size,
+ void *vaddr, dma_addr_t dma_handle)
+{
+ free_pages((unsigned long)vaddr, get_order(size));
+}
+
+static dma_addr_t bpa_map_single(struct device *hwdev, void *ptr,
+ size_t size, enum dma_data_direction direction)
+{
+ return virt_to_abs(ptr) | BPA_DMA_VALID;
+}
+
+static void bpa_unmap_single(struct device *hwdev, dma_addr_t dma_addr,
+ size_t size, enum dma_data_direction direction)
+{
+}
+
+static int bpa_map_sg(struct device *hwdev, struct scatterlist *sg,
+ int nents, enum dma_data_direction direction)
+{
+ int i;
+
+ for (i = 0; i < nents; i++, sg++) {
+ sg->dma_address = (page_to_phys(sg->page) + sg->offset)
+ | BPA_DMA_VALID;
+ sg->dma_length = sg->length;
+ }
+
+ return nents;
+}
+
+static void bpa_unmap_sg(struct device *hwdev, struct scatterlist *sg,
+ int nents, enum dma_data_direction direction)
+{
+}
+
+static int bpa_dma_supported(struct device *dev, u64 mask)
+{
+ return mask < 0x100000000ull;
+}
+
+void bpa_init_iommu(void)
+{
+ bpa_map_iommu();
+
+ /* Direct I/O, IOMMU off */
+ ppc_md.iommu_dev_setup = iommu_dev_setup_null;
+ ppc_md.iommu_bus_setup = iommu_bus_setup_null;
+
+ pci_dma_ops.alloc_coherent = bpa_alloc_coherent;
+ pci_dma_ops.free_coherent = bpa_free_coherent;
+ pci_dma_ops.map_single = bpa_map_single;
+ pci_dma_ops.unmap_single = bpa_unmap_single;
+ pci_dma_ops.map_sg = bpa_map_sg;
+ pci_dma_ops.unmap_sg = bpa_unmap_sg;
+ pci_dma_ops.dma_supported = bpa_dma_supported;
+}
Index: linus-2.5/arch/ppc64/kernel/bpa_iommu.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linus-2.5/arch/ppc64/kernel/bpa_iommu.h 2005-04-29 09:47:29.000000000 +0200
@@ -0,0 +1,65 @@
+#ifndef BPA_IOMMU_H
+#define BPA_IOMMU_H
+
+/* some constants */
+enum {
+ /* segment table entries */
+ IOST_VALID_MASK = 0x8000000000000000ul,
+ IOST_TAG_MASK = 0x3000000000000000ul,
+ IOST_PT_BASE_MASK = 0x000003fffffff000ul,
+ IOST_NNPT_MASK = 0x0000000000000fe0ul,
+ IOST_PS_MASK = 0x000000000000000ful,
+
+ IOST_PS_4K = 0x1,
+ IOST_PS_64K = 0x3,
+ IOST_PS_1M = 0x5,
+ IOST_PS_16M = 0x7,
+
+ /* iopt tag register */
+ IOPT_VALID_MASK = 0x0000000200000000ul,
+ IOPT_TAG_MASK = 0x00000001fffffffful,
+
+ /* iopt cache register */
+ IOPT_PROT_MASK = 0xc000000000000000ul,
+ IOPT_PROT_NONE = 0x0000000000000000ul,
+ IOPT_PROT_READ = 0x4000000000000000ul,
+ IOPT_PROT_WRITE = 0x8000000000000000ul,
+ IOPT_PROT_RW = 0xc000000000000000ul,
+ IOPT_COHERENT = 0x2000000000000000ul,
+
+ IOPT_ORDER_MASK = 0x1800000000000000ul,
+ /* order access to same IOID/VC on same address */
+ IOPT_ORDER_ADDR = 0x0800000000000000ul,
+ /* similar, but only after a write access */
+ IOPT_ORDER_WRITES = 0x1000000000000000ul,
+ /* Order all accesses to same IOID/VC */
+ IOPT_ORDER_VC = 0x1800000000000000ul,
+
+ IOPT_RPN_MASK = 0x000003fffffff000ul,
+ IOPT_HINT_MASK = 0x0000000000000800ul,
+ IOPT_IOID_MASK = 0x00000000000007fful,
+
+ IOSTO_ENABLE = 0x8000000000000000ul,
+ IOSTO_ORIGIN = 0x000003fffffff000ul,
+ IOSTO_HW = 0x0000000000000800ul,
+ IOSTO_SW = 0x0000000000000400ul,
+
+ IOCMD_CONF_TE = 0x0000800000000000ul,
+
+ /* memory mapped registers */
+ IOC_PT_CACHE_DIR = 0x000,
+ IOC_ST_CACHE_DIR = 0x800,
+ IOC_PT_CACHE_REG = 0x910,
+ IOC_ST_ORIGIN = 0x918,
+ IOC_CONF = 0x930,
+
+ /* The high bit needs to be set on every DMA address,
+ only 2GB are addressable */
+ BPA_DMA_VALID = 0x80000000,
+ BPA_DMA_MASK = 0x7fffffff,
+};
+
+
+void bpa_init_iommu(void);
+
+#endif
Index: linus-2.5/arch/ppc64/kernel/bpa_setup.c
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/bpa_setup.c 2005-04-22 06:59:58.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/bpa_setup.c 2005-04-29 10:01:12.000000000 +0200
@@ -46,6 +46,7 @@
#include "pci.h"
#include "bpa_iic.h"
+#include "bpa_iommu.h"
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
@@ -179,7 +180,7 @@
hpte_init_native();
- pci_direct_iommu_init();
+ bpa_init_iommu();
ppc64_interrupt_controller = IC_BPA_IIC;
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH 3/4] ppc64: Add driver for BPA iommu
2005-04-29 8:31 ` Arnd Bergmann
@ 2005-04-29 13:06 ` Paul Mackerras
0 siblings, 0 replies; 15+ messages in thread
From: Paul Mackerras @ 2005-04-29 13:06 UTC (permalink / raw)
To: Arnd Bergmann
Cc: Benjamin Herrenschmidt, linuxppc64-dev, Linux Kernel list,
Anton Blanchard
Arnd Bergmann writes:
> Implementation of software load support for the BE iommu. This is very
Could you expand a bit on what "software load support" is? Your
description is a bit terse.
Thanks,
Paul.
^ permalink raw reply [flat|nested] 15+ messages in thread
end of thread, other threads:[~2005-04-29 13:06 UTC | newest]
Thread overview: 15+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2005-04-28 7:54 [PATCH 0/4] ppc64: Introduce BPA platform Arnd Bergmann
2005-04-28 7:56 ` [PATCH 1/4] ppc64: add BPA platform type Arnd Bergmann
2005-04-28 7:58 ` [PATCH 2/4] ppc64: Add driver for BPA interrupt controllers Arnd Bergmann
2005-04-28 7:59 ` [PATCH 3/4] ppc64: Add driver for BPA iommu Arnd Bergmann
2005-04-28 14:05 ` Olof Johansson
2005-04-28 14:30 ` Olof Johansson
2005-04-29 4:35 ` Arnd Bergmann
2005-04-29 5:36 ` Olof Johansson
2005-04-29 5:48 ` Arnd Bergmann
2005-04-29 6:43 ` Benjamin Herrenschmidt
2005-04-29 8:31 ` Arnd Bergmann
2005-04-29 13:06 ` Paul Mackerras
2005-04-28 8:00 ` [PATCH 4/4] ppc64: Add SPU file system Arnd Bergmann
2005-04-28 14:44 ` [PATCH 0/4] ppc64: Introduce BPA platform Sonny Rao
2005-04-29 4:35 ` Arnd Bergmann
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