[PATCH] XBox Gaming System subarchitecture.

* [PATCH] XBox Gaming System subarchitecture.
@ 2003-07-14 12:49 Anders Gustafsson - xbox patch monkey
  2003-07-14 13:59 ` Dave Jones
                   ` (2 more replies)
  0 siblings, 3 replies; 12+ messages in thread
From: Anders Gustafsson - xbox patch monkey @ 2003-07-14 12:49 UTC (permalink / raw)
  To: torvalds; +Cc: linux-kernel

A wise man recently said:

''That pretty much cuts the list of "needs to be supported" down to x86,
  ia64, x86-64 and possibly sparc/alpha.''

Some parts of x86 are still not supported, namely the bastardized PC called
Xbox. The patch below fixes that. Rediffed to latest bk.

Please apply. Snälla.

-- 
Anders Gustafsson - andersg@0x63.nu - http://0x63.nu/

You can import this changeset into BK by piping this whole message to:
'| bk receive [path to repository]' or apply the patch as usual.

===================================================================


ChangeSet
  1.1459 03/07/14 12:55:39 andersg@0x63.nu +10 -0
  Added XBox Gaming System subarchitecture.

  include/asm-i386/mach-xbox/mach_pci_blacklist.h
    1.1 03/07/14 12:48:09 andersg@0x63.nu +6 -0

  include/asm-i386/mach-default/mach_pci_blacklist.h
    1.1 03/07/14 12:48:09 andersg@0x63.nu +6 -0

  include/asm-i386/mach-xbox/mach_pci_blacklist.h
    1.0 03/07/14 12:48:09 andersg@0x63.nu +0 -0
    BitKeeper file /data/dev/kernel/bk/xbox-2.5/include/asm-i386/mach-xbox/mach_pci_blacklist.h

  include/asm-i386/mach-default/mach_pci_blacklist.h
    1.0 03/07/14 12:48:09 andersg@0x63.nu +0 -0
    BitKeeper file /data/dev/kernel/bk/xbox-2.5/include/asm-i386/mach-default/mach_pci_blacklist.h

  arch/i386/mach-xbox/setup.c
    1.1 03/07/14 12:48:08 andersg@0x63.nu +79 -0

  arch/i386/mach-xbox/setup.c
    1.0 03/07/14 12:48:08 andersg@0x63.nu +0 -0
    BitKeeper file /data/dev/kernel/bk/xbox-2.5/arch/i386/mach-xbox/setup.c

  arch/i386/mach-xbox/reboot.c
    1.1 03/07/14 12:48:07 andersg@0x63.nu +51 -0

  arch/i386/mach-xbox/Makefile
    1.1 03/07/14 12:48:07 andersg@0x63.nu +5 -0

  include/asm-i386/timex.h
    1.6 03/07/14 12:48:07 andersg@0x63.nu +5 -1
    The xbox has a different CLOCK_TICK_RATE.

  arch/i386/mach-xbox/reboot.c
    1.0 03/07/14 12:48:07 andersg@0x63.nu +0 -0
    BitKeeper file /data/dev/kernel/bk/xbox-2.5/arch/i386/mach-xbox/reboot.c

  arch/i386/mach-xbox/Makefile
    1.0 03/07/14 12:48:07 andersg@0x63.nu +0 -0
    BitKeeper file /data/dev/kernel/bk/xbox-2.5/arch/i386/mach-xbox/Makefile

  arch/i386/pci/direct.c
    1.19 03/07/14 12:48:06 andersg@0x63.nu +4 -0
    Added a mach-hook for blacklisting pci-devices.
    The xbox uses this to prevent it from touching some devices that makes
    it hang.

  arch/i386/boot/compressed/Makefile
    1.17 03/07/14 12:48:06 andersg@0x63.nu +5 -0
    There is some strange interaction when paging is off, that makes 1.1 xboxen
    crash while decompressing kernel. Compiling the decompressor without
    optimization works around this problem.

  arch/i386/Makefile
    1.53 03/07/14 12:48:06 andersg@0x63.nu +4 -0
    Added XBox Gaming System subarchitecture.

  arch/i386/Kconfig
    1.67 03/07/14 12:48:06 andersg@0x63.nu +19 -2
    Added configoption for XBox Gaming System subarchitecture.


 arch/i386/Kconfig                                  |   21 +++++
 arch/i386/Makefile                                 |    4 +
 arch/i386/boot/compressed/Makefile                 |    5 +
 arch/i386/mach-xbox/Makefile                       |    5 +
 arch/i386/mach-xbox/reboot.c                       |   51 +++++++++++++
 arch/i386/mach-xbox/setup.c                        |   79 +++++++++++++++++++++
 arch/i386/pci/direct.c                             |    4 +
 include/asm-i386/mach-default/mach_pci_blacklist.h |    6 +
 include/asm-i386/mach-xbox/mach_pci_blacklist.h    |    6 +
 include/asm-i386/timex.h                           |    6 +
 10 files changed, 184 insertions(+), 3 deletions(-)


diff -Nru a/arch/i386/Kconfig b/arch/i386/Kconfig

--- a/arch/i386/Kconfig	Mon Jul 14 13:17:53 2003
+++ b/arch/i386/Kconfig	Mon Jul 14 13:17:53 2003
@@ -43,6 +43,22 @@
 	help
 	  Choose this option if your computer is a standard PC or compatible.
 
+config X86_XBOX
+	bool "XBox Gaming System"
+	help
+	  This option is needed to make Linux boot on XBox Gaming Systems.
+	  
+	  The XBox can be considered as a standard PC with a Coppermine-based Celeron 733 MHz,
+	  IDE harddrive, DVD, Ethernet, USB and graphics. 
+	  
+	  To boot the kernel you need "_romwell", either used as a replacement BIOS (cromwell)
+	  or as a bootloader.
+	  
+	  For more information see http://xbox-linux.sourceforge.net/ 
+	  
+	  If you do not specifically need a kernel for XBOX machine,
+	  say N here otherwise the kernel you build will not be bootable.
+
 config X86_VOYAGER
 	bool "Voyager (NCR)"
 	help
@@ -409,6 +425,7 @@
 	  Otherwise, say N.
 
 config SMP
+	depends on !X86_XBOX
 	bool "Symmetric multi-processing support"
 	---help---
 	  This enables support for systems with more than one CPU. If you have
@@ -1104,7 +1121,7 @@
 
 config MCA
 	bool "MCA support"
-	depends on !(X86_VISWS || X86_VOYAGER)
+	depends on !(X86_VISWS || X86_VOYAGER || X86_XBOX)
 	help
 	  MicroChannel Architecture is found in some IBM PS/2 machines and
 	  laptops.  It is a bus system similar to PCI or ISA. See
@@ -1403,7 +1420,7 @@
 
 config X86_BIOS_REBOOT
 	bool
-	depends on !(X86_VISWS || X86_VOYAGER)
+	depends on !(X86_VISWS || X86_VOYAGER || X86_XBOX)
 	default y
 
 config X86_TRAMPOLINE
diff -Nru a/arch/i386/Makefile b/arch/i386/Makefile
--- a/arch/i386/Makefile	Mon Jul 14 13:17:53 2003
+++ b/arch/i386/Makefile	Mon Jul 14 13:17:53 2003
@@ -53,6 +53,10 @@
 # Default subarch .c files
 mcore-y  := mach-default
 
+# Xbox subarch support
+mflags-$(CONFIG_X86_XBOX)	:= -Iinclude/asm-i386/mach-xbox
+mcore-$(CONFIG_X86_XBOX)	:= mach-xbox
+
 # Voyager subarch support
 mflags-$(CONFIG_X86_VOYAGER)	:= -Iinclude/asm-i386/mach-voyager
 mcore-$(CONFIG_X86_VOYAGER)	:= mach-voyager
diff -Nru a/arch/i386/boot/compressed/Makefile b/arch/i386/boot/compressed/Makefile
--- a/arch/i386/boot/compressed/Makefile	Mon Jul 14 13:17:53 2003
+++ b/arch/i386/boot/compressed/Makefile	Mon Jul 14 13:17:53 2003
@@ -5,6 +5,11 @@
 #
 
 targets		:= vmlinux vmlinux.bin vmlinux.bin.gz head.o misc.o piggy.o
+ifeq ($(CONFIG_X86_XBOX),y)
+#XXX Compiling with optimization makes 1.1-xboxen 
+#    crash while decompressing the kernel
+CFLAGS_misc.o   := -O0
+endif
 EXTRA_AFLAGS	:= -traditional
 
 LDFLAGS_vmlinux := -Ttext $(IMAGE_OFFSET) -e startup_32
diff -Nru a/arch/i386/mach-xbox/Makefile b/arch/i386/mach-xbox/Makefile
--- /dev/null	Wed Dec 31 16:00:00 1969
+++ b/arch/i386/mach-xbox/Makefile	Mon Jul 14 13:17:53 2003
@@ -0,0 +1,5 @@
+#
+# Makefile for the linux kernel.
+#
+
+obj-y				:= setup.o reboot.o
diff -Nru a/arch/i386/mach-xbox/reboot.c b/arch/i386/mach-xbox/reboot.c
--- /dev/null	Wed Dec 31 16:00:00 1969
+++ b/arch/i386/mach-xbox/reboot.c	Mon Jul 14 13:17:53 2003
@@ -0,0 +1,51 @@
+/*
+ * arch/i386/mach-xbox/reboot.c 
+ * Olivier Fauchon <olivier.fauchon@free.fr>
+ * Anders Gustafsson <andersg@0x63.nu>
+ *
+ */
+
+#include <asm/io.h>
+
+/* we don't use any of those, but dmi_scan.c needs 'em */
+void (*pm_power_off)(void);
+int reboot_thru_bios;
+
+#define XBOX_SMB_IO_BASE 0xC000
+#define XBOX_SMB_HOST_ADDRESS       (0x4 + XBOX_SMB_IO_BASE)
+#define XBOX_SMB_HOST_COMMAND       (0x8 + XBOX_SMB_IO_BASE)
+#define XBOX_SMB_HOST_DATA          (0x6 + XBOX_SMB_IO_BASE)
+#define XBOX_SMB_GLOBAL_ENABLE      (0x2 + XBOX_SMB_IO_BASE)
+
+#define XBOX_PIC_ADDRESS 0x10
+
+#define SMC_CMD_POWER 0x02
+#define SMC_SUBCMD_POWER_RESET 0x01
+#define SMC_SUBCMD_POWER_CYCLE 0x40
+#define SMC_SUBCMD_POWER_OFF 0x80
+
+
+static void xbox_pic_cmd(u8 command)
+{
+	outw_p(((XBOX_PIC_ADDRESS) << 1),XBOX_SMB_HOST_ADDRESS);
+	outb_p(SMC_CMD_POWER, XBOX_SMB_HOST_COMMAND);
+	outw_p(command, XBOX_SMB_HOST_DATA);
+	outw_p(inw(XBOX_SMB_IO_BASE),XBOX_SMB_IO_BASE);
+	outb_p(0x0a,XBOX_SMB_GLOBAL_ENABLE);
+}
+
+void machine_restart(char * __unused)
+{
+	printk(KERN_INFO "Sending POWER_RESET to XBOX-PIC.\n");
+	xbox_pic_cmd(SMC_SUBCMD_POWER_RESET);  
+}
+
+void machine_power_off(void)
+{
+	printk(KERN_INFO "Sending POWER_OFF to XBOX-PIC.\n");
+	xbox_pic_cmd(SMC_SUBCMD_POWER_OFF);  
+}
+
+void machine_halt(void)
+{
+}
diff -Nru a/arch/i386/mach-xbox/setup.c b/arch/i386/mach-xbox/setup.c
--- /dev/null	Wed Dec 31 16:00:00 1969
+++ b/arch/i386/mach-xbox/setup.c	Mon Jul 14 13:17:53 2003
@@ -0,0 +1,79 @@
+/*
+ *	Machine specific setup for xbox
+ */
+
+#include <linux/config.h>
+#include <linux/smp.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <asm/arch_hooks.h>
+
+/**
+ * pre_intr_init_hook - initialisation prior to setting up interrupt vectors
+ *
+ * Description:
+ *	Perform any necessary interrupt initialisation prior to setting up
+ *	the "ordinary" interrupt call gates.  For legacy reasons, the ISA
+ *	interrupts should be initialised here if the machine emulates a PC
+ *	in any way.
+ **/
+void __init pre_intr_init_hook(void)
+{
+	init_ISA_irqs();
+}
+
+/**
+ * intr_init_hook - post gate setup interrupt initialisation
+ *
+ * Description:
+ *	Fill in any interrupts that may have been left out by the general
+ *	init_IRQ() routine.  interrupts having to do with the machine rather
+ *	than the devices on the I/O bus (like APIC interrupts in intel MP
+ *	systems) are started here.
+ **/
+void __init intr_init_hook(void)
+{
+#ifdef CONFIG_X86_LOCAL_APIC
+	apic_intr_init();
+#endif
+
+}
+
+/**
+ * pre_setup_arch_hook - hook called prior to any setup_arch() execution
+ *
+ * Description:
+ *	generally used to activate any machine specific identification
+ *	routines that may be needed before setup_arch() runs.  On VISWS
+ *	this is used to get the board revision and type.
+ **/
+void __init pre_setup_arch_hook(void)
+{
+}
+
+/**
+ * trap_init_hook - initialise system specific traps
+ *
+ * Description:
+ *	Called as the final act of trap_init().  Used in VISWS to initialise
+ *	the various board specific APIC traps.
+ **/
+void __init trap_init_hook(void)
+{
+}
+
+static struct irqaction irq0  = { timer_interrupt, SA_INTERRUPT, 0, "timer", NULL, NULL};
+
+/**
+ * time_init_hook - do any specific initialisations for the system timer.
+ *
+ * Description:
+ *	Must plug the system timer interrupt source at HZ into the IRQ listed
+ *	in irq_vectors.h:TIMER_IRQ
+ **/
+void __init time_init_hook(void)
+{
+	setup_irq(0, &irq0);
+}
+
diff -Nru a/arch/i386/pci/direct.c b/arch/i386/pci/direct.c
--- a/arch/i386/pci/direct.c	Mon Jul 14 13:17:53 2003
+++ b/arch/i386/pci/direct.c	Mon Jul 14 13:17:53 2003
@@ -4,6 +4,7 @@
 
 #include <linux/pci.h>
 #include <linux/init.h>
+#include "mach_pci_blacklist.h"
 #include "pci.h"
 
 /*
@@ -20,6 +21,9 @@
 	if (!value || (bus > 255) || (devfn > 255) || (reg > 255))
 		return -EINVAL;
 
+	if (mach_pci_is_blacklisted(bus,PCI_SLOT(devfn),PCI_FUNC(devfn)))
+		return -EINVAL;
+	
 	spin_lock_irqsave(&pci_config_lock, flags);
 
 	outl(PCI_CONF1_ADDRESS(bus, devfn, reg), 0xCF8);
diff -Nru a/include/asm-i386/mach-default/mach_pci_blacklist.h b/include/asm-i386/mach-default/mach_pci_blacklist.h
--- /dev/null	Wed Dec 31 16:00:00 1969
+++ b/include/asm-i386/mach-default/mach_pci_blacklist.h	Mon Jul 14 13:17:53 2003
@@ -0,0 +1,6 @@
+#ifndef __ASM_MACH_PCI_BLACKLIST_H
+#define __ASM_MACH_PCI_BLACKLIST_H
+
+#define mach_pci_is_blacklisted(bus,dev,fn) 0
+
+#endif
diff -Nru a/include/asm-i386/mach-xbox/mach_pci_blacklist.h b/include/asm-i386/mach-xbox/mach_pci_blacklist.h
--- /dev/null	Wed Dec 31 16:00:00 1969
+++ b/include/asm-i386/mach-xbox/mach_pci_blacklist.h	Mon Jul 14 13:17:53 2003
@@ -0,0 +1,6 @@
+#ifndef __ASM_MACH_PCI_BLACKLIST_H
+#define __ASM_MACH_PCI_BLACKLIST_H
+
+#define mach_pci_is_blacklisted(bus,dev,fn) ( (bus>1) || (bus&&(dev||fn)) || ((bus==0 && dev==0) && ((fn==1)||(fn==2))) )
+
+#endif
diff -Nru a/include/asm-i386/timex.h b/include/asm-i386/timex.h
--- a/include/asm-i386/timex.h	Mon Jul 14 13:17:53 2003
+++ b/include/asm-i386/timex.h	Mon Jul 14 13:17:53 2003
@@ -15,7 +15,11 @@
 #ifdef CONFIG_MELAN
 #  define CLOCK_TICK_RATE 1189200 /* AMD Elan has different frequency! */
 #else
-#  define CLOCK_TICK_RATE 1193182 /* Underlying HZ */
+#  ifdef CONFIG_X86_XBOX
+#    define CLOCK_TICK_RATE 1124998 /* so has the Xbox */
+#  else 
+#    define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
+#  endif
 #endif
 #endif
 

===================================================================


This BitKeeper patch contains the following changesets:
1.1459
## Wrapped with gzip_uu ##


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