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authorAlbert Herranz <albert_herranz@yahoo.es>2009-12-12 06:31:45 +0000
committerGrant Likely <grant.likely@secretlab.ca>2009-12-12 22:24:29 -0700
commit6cdd24179d31b5e9beaea01f8ac5a1ba77415e33 (patch)
treef3128d23707c00b165b90b3b9e8bec9a93218b77 /arch
parent7a09116c016611effe7037c8346c5f42a7416718 (diff)
downloadblackbird-op-linux-6cdd24179d31b5e9beaea01f8ac5a1ba77415e33.tar.gz
blackbird-op-linux-6cdd24179d31b5e9beaea01f8ac5a1ba77415e33.zip
powerpc: wii: bootwrapper bits
Add support for the Nintendo Wii video game console to the powerpc bootwrapper. dtbImage.wii is a wrapped image that contains a flat device tree, an entry point compatible with the Homebrew Channel and BootMii, and an optional initrd. Signed-off-by: Albert Herranz <albert_herranz@yahoo.es> Acked-by: Segher Boessenkool <segher@kernel.crashing.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/boot/Makefile3
-rw-r--r--arch/powerpc/boot/wii-head.S142
-rw-r--r--arch/powerpc/boot/wii.c46
-rwxr-xr-xarch/powerpc/boot/wrapper2
4 files changed, 191 insertions, 2 deletions
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 3e70aabf6778..bb2465bcb327 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -77,7 +77,7 @@ src-plat := of.c cuboot-52xx.c cuboot-824x.c cuboot-83xx.c cuboot-85xx.c holly.c
cuboot-warp.c cuboot-85xx-cpm2.c cuboot-yosemite.c simpleboot.c \
virtex405-head.S virtex.c redboot-83xx.c cuboot-sam440ep.c \
cuboot-acadia.c cuboot-amigaone.c cuboot-kilauea.c \
- gamecube-head.S gamecube.c
+ gamecube-head.S gamecube.c wii-head.S wii.c
src-boot := $(src-wlib) $(src-plat) empty.c
src-boot := $(addprefix $(obj)/, $(src-boot))
@@ -256,6 +256,7 @@ image-$(CONFIG_STORCENTER) += cuImage.storcenter
image-$(CONFIG_MPC7448HPC2) += cuImage.mpc7448hpc2
image-$(CONFIG_PPC_C2K) += cuImage.c2k
image-$(CONFIG_GAMECUBE) += dtbImage.gamecube
+image-$(CONFIG_WII) += dtbImage.wii
# Board port in arch/powerpc/platform/amigaone/Kconfig
image-$(CONFIG_AMIGAONE) += cuImage.amigaone
diff --git a/arch/powerpc/boot/wii-head.S b/arch/powerpc/boot/wii-head.S
new file mode 100644
index 000000000000..edd79b836fcf
--- /dev/null
+++ b/arch/powerpc/boot/wii-head.S
@@ -0,0 +1,142 @@
+/*
+ * arch/powerpc/boot/wii-head.S
+ *
+ * Nintendo Wii bootwrapper entry.
+ * Copyright (C) 2008-2009 The GameCube Linux Team
+ * Copyright (C) 2008,2009 Albert Herranz
+ *
+ * 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.
+ *
+ */
+
+#include "ppc_asm.h"
+
+/*
+ * The entry code does no assumptions regarding:
+ * - if the data and instruction caches are enabled or not
+ * - if the MMU is enabled or not
+ * - if the high BATs are enabled or not
+ *
+ * We enable the high BATs, enable the caches if not already enabled,
+ * enable the MMU with an identity mapping scheme and jump to the start code.
+ */
+
+ .text
+
+ .globl _zimage_start
+_zimage_start:
+
+ /* turn the MMU off */
+ mfmsr 9
+ rlwinm 9, 9, 0, ~((1<<4)|(1<<5)) /* MSR_DR|MSR_IR */
+ bcl 20, 31, 1f
+1:
+ mflr 8
+ clrlwi 8, 8, 3 /* convert to a real address */
+ addi 8, 8, _mmu_off - 1b
+ mtsrr0 8
+ mtsrr1 9
+ rfi
+_mmu_off:
+ /* MMU disabled */
+
+ /* setup BATs */
+ isync
+ li 8, 0
+ mtspr 0x210, 8 /* IBAT0U */
+ mtspr 0x212, 8 /* IBAT1U */
+ mtspr 0x214, 8 /* IBAT2U */
+ mtspr 0x216, 8 /* IBAT3U */
+ mtspr 0x218, 8 /* DBAT0U */
+ mtspr 0x21a, 8 /* DBAT1U */
+ mtspr 0x21c, 8 /* DBAT2U */
+ mtspr 0x21e, 8 /* DBAT3U */
+
+ mtspr 0x230, 8 /* IBAT4U */
+ mtspr 0x232, 8 /* IBAT5U */
+ mtspr 0x234, 8 /* IBAT6U */
+ mtspr 0x236, 8 /* IBAT7U */
+ mtspr 0x238, 8 /* DBAT4U */
+ mtspr 0x23a, 8 /* DBAT5U */
+ mtspr 0x23c, 8 /* DBAT6U */
+ mtspr 0x23e, 8 /* DBAT7U */
+
+ li 8, 0x01ff /* first 16MiB */
+ li 9, 0x0002 /* rw */
+ mtspr 0x211, 9 /* IBAT0L */
+ mtspr 0x210, 8 /* IBAT0U */
+ mtspr 0x219, 9 /* DBAT0L */
+ mtspr 0x218, 8 /* DBAT0U */
+
+ lis 8, 0x0c00 /* I/O mem */
+ ori 8, 8, 0x3ff /* 32MiB */
+ lis 9, 0x0c00
+ ori 9, 9, 0x002a /* uncached, guarded, rw */
+ mtspr 0x21b, 9 /* DBAT1L */
+ mtspr 0x21a, 8 /* DBAT1U */
+
+ lis 8, 0x0100 /* next 8MiB */
+ ori 8, 8, 0x00ff /* 8MiB */
+ lis 9, 0x0100
+ ori 9, 9, 0x0002 /* rw */
+ mtspr 0x215, 9 /* IBAT2L */
+ mtspr 0x214, 8 /* IBAT2U */
+ mtspr 0x21d, 9 /* DBAT2L */
+ mtspr 0x21c, 8 /* DBAT2U */
+
+ lis 8, 0x1000 /* MEM2 */
+ ori 8, 8, 0x07ff /* 64MiB */
+ lis 9, 0x1000
+ ori 9, 9, 0x0002 /* rw */
+ mtspr 0x216, 8 /* IBAT3U */
+ mtspr 0x217, 9 /* IBAT3L */
+ mtspr 0x21e, 8 /* DBAT3U */
+ mtspr 0x21f, 9 /* DBAT3L */
+
+ /* enable the high BATs */
+ mfspr 8, 0x3f3 /* HID4 */
+ oris 8, 8, 0x0200
+ mtspr 0x3f3, 8 /* HID4 */
+
+ /* enable and invalidate the caches if not already enabled */
+ mfspr 8, 0x3f0 /* HID0 */
+ andi. 0, 8, (1<<15) /* HID0_ICE */
+ bne 1f
+ ori 8, 8, (1<<15)|(1<<11) /* HID0_ICE|HID0_ICFI*/
+1:
+ andi. 0, 8, (1<<14) /* HID0_DCE */
+ bne 1f
+ ori 8, 8, (1<<14)|(1<<10) /* HID0_DCE|HID0_DCFI*/
+1:
+ mtspr 0x3f0, 8 /* HID0 */
+ isync
+
+ /* initialize arguments */
+ li 3, 0
+ li 4, 0
+ li 5, 0
+
+ /* turn the MMU on */
+ bcl 20, 31, 1f
+1:
+ mflr 8
+ addi 8, 8, _mmu_on - 1b
+ mfmsr 9
+ ori 9, 9, (1<<4)|(1<<5) /* MSR_DR|MSR_IR */
+ mtsrr0 8
+ mtsrr1 9
+ sync
+ rfi
+_mmu_on:
+ /* turn on the front blue led (aka: yay! we got here!) */
+ lis 8, 0x0d00
+ ori 8, 8, 0x00c0
+ lwz 9, 0(8)
+ ori 9, 9, 0x20
+ stw 9, 0(8)
+
+ b _zimage_start_lib
+
diff --git a/arch/powerpc/boot/wii.c b/arch/powerpc/boot/wii.c
new file mode 100644
index 000000000000..d0e2625a9539
--- /dev/null
+++ b/arch/powerpc/boot/wii.c
@@ -0,0 +1,46 @@
+/*
+ * arch/powerpc/boot/wii.c
+ *
+ * Nintendo Wii bootwrapper support
+ * Copyright (C) 2008-2009 The GameCube Linux Team
+ * Copyright (C) 2008,2009 Albert Herranz
+ *
+ * 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.
+ *
+ */
+
+#include <stddef.h>
+#include "stdio.h"
+#include "types.h"
+#include "io.h"
+#include "ops.h"
+
+#include "ugecon.h"
+
+BSS_STACK(8192);
+
+#define HW_REG(x) ((void *)(x))
+
+#define EXI_CTRL HW_REG(0x0d800070)
+#define EXI_CTRL_ENABLE (1<<0)
+
+void platform_init(unsigned long r3, unsigned long r4, unsigned long r5)
+{
+ u32 heapsize = 24*1024*1024 - (u32)_end;
+
+ simple_alloc_init(_end, heapsize, 32, 64);
+ fdt_init(_dtb_start);
+
+ /*
+ * 'mini' boots the Broadway processor with EXI disabled.
+ * We need it enabled before probing for the USB Gecko.
+ */
+ out_be32(EXI_CTRL, in_be32(EXI_CTRL) | EXI_CTRL_ENABLE);
+
+ if (ug_probe())
+ console_ops.write = ug_console_write;
+}
+
diff --git a/arch/powerpc/boot/wrapper b/arch/powerpc/boot/wrapper
index 5b9206f45552..390512ae7f86 100755
--- a/arch/powerpc/boot/wrapper
+++ b/arch/powerpc/boot/wrapper
@@ -230,7 +230,7 @@ xpedite52*)
link_address='0x1400000'
platformo=$object/cuboot-85xx.o
;;
-gamecube)
+gamecube|wii)
link_address='0x600000'
platformo="$object/$platform-head.o $object/$platform.o"
;;
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