[Patch] i386: Xbox support

From: Ed Schouten
Date: Mon Sep 27 2004 - 13:04:25 EST

Added support for Microsoft Xbox gaming consoles by adding the config
option 'CONFIG_X86_XBOX'. This patch is very minimalistic and should give
the fellows at xbox-linux.org a starting point.
---

CREDITS | 8 +++++++
arch/i386/Kconfig | 16 ++++++++++++--
arch/i386/Makefile | 3 ++
arch/i386/boot/compressed/Makefile | 7 ++++++
arch/i386/mach-xbox/Makefile | 5 ++++
arch/i386/mach-xbox/reboot.c | 41
+++++++++++++++++++++++++++++++++++++
arch/i386/pci/direct.c | 15 +++++++++++++
include/asm-i386/timex.h | 2 +
include/asm-i386/xbox.h | 17 +++++++++++++++
include/linux/pci_ids.h | 1
10 files changed, 113 insertions(+), 2 deletions(-)

diff -u -r --new-file linux-2.6.9-rc2/CREDITS linux-2.6.9-rc2-xbox/CREDITS
--- linux-2.6.9-rc2/CREDITS 2004-09-27 14:38:55.874666000 +0200
+++ linux-2.6.9-rc2-xbox/CREDITS 2004-09-27 19:34:06.201661000 +0200
@@ -2944,6 +2944,14 @@
E:
D: Macintosh IDE Driver

+N: Ed Schouten
+E: ed@xxxxxxxxxxxx
+W: http://g-rave.nl/
+D: Imported Xbox workarounds
+S: Klinkerstraat 20
+S: 5361 GW Grave
+S: The Netherlands
+
N: Peter De Schrijver
E: stud11@xxxxxxxxxxxxxxxxxx
D: Mitsumi CD-ROM driver patches March version
diff -u -r --new-file linux-2.6.9-rc2/arch/i386/Kconfig
linux-2.6.9-rc2-xbox/arch/i386/Kconfig
--- linux-2.6.9-rc2/arch/i386/Kconfig 2004-09-27 14:38:58.438666000 +0200
+++ linux-2.6.9-rc2-xbox/arch/i386/Kconfig 2004-09-27 09:40:28.881666000
+0200
@@ -51,6 +51,18 @@

If unsure, choose "PC-compatible" instead.

+config X86_XBOX
+ bool "Microsoft Xbox"
+ help
+ This option is needed to make Linux boot on a Microsoft Xbox.
+
+ If you are not planning on running this kernel on a Microsoft Xbox,
+ say N here, otherwise the kernel you build will not be bootable.
+
+ For more information about Xbox Linux, visit:
+
+ http://www.xbox-linux.org/
+
config X86_VOYAGER
bool "Voyager (NCR)"
help
@@ -1139,7 +1151,7 @@

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
@@ -1202,7 +1214,7 @@

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 -u -r --new-file linux-2.6.9-rc2/arch/i386/Makefile
linux-2.6.9-rc2-xbox/arch/i386/Makefile
--- linux-2.6.9-rc2/arch/i386/Makefile 2004-09-27 14:38:58.443666000 +0200
+++ linux-2.6.9-rc2-xbox/arch/i386/Makefile 2004-09-27 15:23:26.244666000
+0200
@@ -69,6 +69,9 @@
mflags-$(CONFIG_X86_VOYAGER) := -Iinclude/asm-i386/mach-voyager
mcore-$(CONFIG_X86_VOYAGER) := mach-voyager

+# Xbox subarch support
+core-$(CONFIG_X86_XBOX) += arch/i386/mach-xbox/
+
# VISWS subarch support
mflags-$(CONFIG_X86_VISWS) := -Iinclude/asm-i386/mach-visws
mcore-$(CONFIG_X86_VISWS) := mach-visws
diff -u -r --new-file linux-2.6.9-rc2/arch/i386/boot/compressed/Makefile
linux-2.6.9-rc2-xbox/arch/i386/boot/compressed/Makefile
--- linux-2.6.9-rc2/arch/i386/boot/compressed/Makefile 2004-08-14
12:55:48.000000000 +0200
+++ linux-2.6.9-rc2-xbox/arch/i386/boot/compressed/Makefile 2004-09-27
09:40:28.917666000 +0200
@@ -7,6 +7,13 @@
targets := vmlinux vmlinux.bin vmlinux.bin.gz head.o misc.o piggy.o
EXTRA_AFLAGS := -traditional

+# Microsoft Xbox workaround:
+# Xbox v1.1+ crashes while decompressing the kernel when paging is off.
+# By disabling optimization we can fix this.
+ifeq ($(CONFIG_X86_XBOX),y)
+ CFLAGS_misc.o := -O0
+endif
+
LDFLAGS_vmlinux := -Ttext $(IMAGE_OFFSET) -e startup_32

$(obj)/vmlinux: $(obj)/head.o $(obj)/misc.o $(obj)/piggy.o FORCE
diff -u -r --new-file linux-2.6.9-rc2/arch/i386/mach-xbox/Makefile
linux-2.6.9-rc2-xbox/arch/i386/mach-xbox/Makefile
--- linux-2.6.9-rc2/arch/i386/mach-xbox/Makefile 1970-01-01
01:00:00.000000000 +0100
+++ linux-2.6.9-rc2-xbox/arch/i386/mach-xbox/Makefile 2004-09-27
14:52:20.504666000 +0200
@@ -0,0 +1,5 @@
+#
+# Makefile for the linux kernel.
+#
+
+obj-$(CONFIG_X86_XBOX) := reboot.o
diff -u -r --new-file linux-2.6.9-rc2/arch/i386/mach-xbox/reboot.c
linux-2.6.9-rc2-xbox/arch/i386/mach-xbox/reboot.c
--- linux-2.6.9-rc2/arch/i386/mach-xbox/reboot.c 1970-01-01
01:00:00.000000000 +0100
+++ linux-2.6.9-rc2-xbox/arch/i386/mach-xbox/reboot.c 2004-09-27
19:30:30.836661000 +0200
@@ -0,0 +1,41 @@
+/*
+ * arch/i386/mach-xbox/reboot.c
+ * Ed Schouten <ed@xxxxxxxxxxxx>
+ *
+ * Originally done by:
+ * Olivier Fauchon <olivier.fauchon@xxxxxxx>
+ * Anders Gustafsson <andersg@xxxxxxx>
+ *
+ */
+
+#include <asm/io.h>
+#include <asm-i386/xbox.h>
+
+/* we don't use any of those, but dmi_scan.c needs 'em */
+void (*pm_power_off)(void);
+int reboot_thru_bios;
+
+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_CYCLE to XBOX-PIC.\n");
+ xbox_pic_cmd(SMC_SUBCMD_POWER_CYCLE);
+}
+
+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 -u -r --new-file linux-2.6.9-rc2/arch/i386/pci/direct.c
linux-2.6.9-rc2-xbox/arch/i386/pci/direct.c
--- linux-2.6.9-rc2/arch/i386/pci/direct.c 2004-08-14 12:54:51.000000000
+0200
+++ linux-2.6.9-rc2-xbox/arch/i386/pci/direct.c 2004-09-27
09:40:28.962666000 +0200
@@ -20,6 +20,21 @@
if (!value || (bus > 255) || (devfn > 255) || (reg > 255))
return -EINVAL;

+#ifdef CONFIG_X86_XBOX
+ /*
+ * Workaround for the Microsoft Xbox:
+ * Prevent it from tampering with some devices.
+ */
+ if ((bus == 0) && !PCI_SLOT(devfn) && ((PCI_FUNC(devfn) == 1) ||
(PCI_FUNC(devfn) == 2)))
+ return -EINVAL;
+
+ if ((bus == 1) && (PCI_SLOT(devfn) || PCI_FUNC(devfn)))
+ return -EINVAL;
+
+ if (bus >= 2)
+ return -EINVAL;
+#endif
+
spin_lock_irqsave(&pci_config_lock, flags);

outl(PCI_CONF1_ADDRESS(bus, devfn, reg), 0xCF8);
diff -u -r --new-file linux-2.6.9-rc2/include/asm-i386/timex.h
linux-2.6.9-rc2-xbox/include/asm-i386/timex.h
--- linux-2.6.9-rc2/include/asm-i386/timex.h 2004-09-27 14:39:32.304666000
+0200
+++ linux-2.6.9-rc2-xbox/include/asm-i386/timex.h 2004-09-27
09:40:28.974666000 +0200
@@ -11,6 +11,8 @@

#ifdef CONFIG_X86_ELAN
# define CLOCK_TICK_RATE 1189200 /* AMD Elan has different frequency! */
+#elif CONFIG_X86_XBOX
+# define CLOCK_TICK_RATE 1125000 /* Microsoft Xbox */
#else
# define CLOCK_TICK_RATE 1193182 /* Underlying HZ */
#endif
diff -u -r --new-file linux-2.6.9-rc2/include/asm-i386/xbox.h
linux-2.6.9-rc2-xbox/include/asm-i386/xbox.h
--- linux-2.6.9-rc2/include/asm-i386/xbox.h 1970-01-01 01:00:00.000000000
+0100
+++ linux-2.6.9-rc2-xbox/include/asm-i386/xbox.h 2004-09-27
09:40:28.976666000 +0200
@@ -0,0 +1,17 @@
+/*
+ * include/asm-i386/xbox.h
+ * Ed Schouten <ed@xxxxxxxxxxxx>
+ */
+
+#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
diff -u -r --new-file linux-2.6.9-rc2/include/linux/pci_ids.h
linux-2.6.9-rc2-xbox/include/linux/pci_ids.h
--- linux-2.6.9-rc2/include/linux/pci_ids.h 2004-09-27 14:39:37.453666000
+0200
+++ linux-2.6.9-rc2-xbox/include/linux/pci_ids.h 2004-09-27
09:40:28.981666000 +0200
@@ -1137,6 +1137,7 @@
#define PCI_DEVICE_ID_NVIDIA_QUADRO4_900XGL 0x0258
#define PCI_DEVICE_ID_NVIDIA_QUADRO4_750XGL 0x0259
#define PCI_DEVICE_ID_NVIDIA_QUADRO4_700XGL 0x025B
+#define PCI_DEVICE_ID_NVIDIA_GEFORCE3_XBOX 0x02A0

#define PCI_VENDOR_ID_IMS 0x10e0
#define PCI_DEVICE_ID_IMS_8849 0x8849
-
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