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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 <[email protected]> Acked-by: Segher Boessenkool <[email protected]> Acked-by: Benjamin Herrenschmidt <[email protected]> Signed-off-by: Grant Likely <[email protected]>
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‎arch/powerpc/boot/Makefile

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -77,7 +77,7 @@ src-plat := of.c cuboot-52xx.c cuboot-824x.c cuboot-83xx.c cuboot-85xx.c holly.c
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cuboot-warp.c cuboot-85xx-cpm2.c cuboot-yosemite.c simpleboot.c \
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virtex405-head.S virtex.c redboot-83xx.c cuboot-sam440ep.c \
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cuboot-acadia.c cuboot-amigaone.c cuboot-kilauea.c \
80-
gamecube-head.S gamecube.c
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gamecube-head.S gamecube.c wii-head.S wii.c
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src-boot := $(src-wlib) $(src-plat) empty.c
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src-boot := $(addprefix $(obj)/, $(src-boot))
@@ -256,6 +256,7 @@ image-$(CONFIG_STORCENTER) += cuImage.storcenter
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image-$(CONFIG_MPC7448HPC2) += cuImage.mpc7448hpc2
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image-$(CONFIG_PPC_C2K) += cuImage.c2k
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image-$(CONFIG_GAMECUBE) += dtbImage.gamecube
259+
image-$(CONFIG_WII) += dtbImage.wii
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# Board port in arch/powerpc/platform/amigaone/Kconfig
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image-$(CONFIG_AMIGAONE) += cuImage.amigaone

‎arch/powerpc/boot/wii-head.S

Lines changed: 142 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,142 @@
1+
/*
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* arch/powerpc/boot/wii-head.S
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*
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* Nintendo Wii bootwrapper entry.
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* Copyright (C) 2008-2009 The GameCube Linux Team
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* Copyright (C) 2008,2009 Albert Herranz
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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*/
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#include "ppc_asm.h"
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/*
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* The entry code does no assumptions regarding:
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* - if the data and instruction caches are enabled or not
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* - if the MMU is enabled or not
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* - if the high BATs are enabled or not
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*
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* We enable the high BATs, enable the caches if not already enabled,
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* enable the MMU with an identity mapping scheme and jump to the start code.
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*/
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.text
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.globl _zimage_start
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_zimage_start:
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/* turn the MMU off */
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mfmsr 9
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rlwinm 9, 9, 0, ~((1<<4)|(1<<5)) /* MSR_DR|MSR_IR */
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bcl 20, 31, 1f
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1:
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mflr 8
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clrlwi 8, 8, 3 /* convert to a real address */
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addi 8, 8, _mmu_off - 1b
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mtsrr0 8
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mtsrr1 9
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rfi
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_mmu_off:
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/* MMU disabled */
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/* setup BATs */
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isync
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li 8, 0
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mtspr 0x210, 8 /* IBAT0U */
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mtspr 0x212, 8 /* IBAT1U */
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mtspr 0x214, 8 /* IBAT2U */
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mtspr 0x216, 8 /* IBAT3U */
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mtspr 0x218, 8 /* DBAT0U */
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mtspr 0x21a, 8 /* DBAT1U */
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mtspr 0x21c, 8 /* DBAT2U */
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mtspr 0x21e, 8 /* DBAT3U */
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mtspr 0x230, 8 /* IBAT4U */
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mtspr 0x232, 8 /* IBAT5U */
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mtspr 0x234, 8 /* IBAT6U */
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mtspr 0x236, 8 /* IBAT7U */
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mtspr 0x238, 8 /* DBAT4U */
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mtspr 0x23a, 8 /* DBAT5U */
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mtspr 0x23c, 8 /* DBAT6U */
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mtspr 0x23e, 8 /* DBAT7U */
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li 8, 0x01ff /* first 16MiB */
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li 9, 0x0002 /* rw */
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mtspr 0x211, 9 /* IBAT0L */
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mtspr 0x210, 8 /* IBAT0U */
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mtspr 0x219, 9 /* DBAT0L */
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mtspr 0x218, 8 /* DBAT0U */
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lis 8, 0x0c00 /* I/O mem */
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ori 8, 8, 0x3ff /* 32MiB */
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lis 9, 0x0c00
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ori 9, 9, 0x002a /* uncached, guarded, rw */
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mtspr 0x21b, 9 /* DBAT1L */
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mtspr 0x21a, 8 /* DBAT1U */
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lis 8, 0x0100 /* next 8MiB */
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ori 8, 8, 0x00ff /* 8MiB */
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lis 9, 0x0100
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ori 9, 9, 0x0002 /* rw */
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mtspr 0x215, 9 /* IBAT2L */
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mtspr 0x214, 8 /* IBAT2U */
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mtspr 0x21d, 9 /* DBAT2L */
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mtspr 0x21c, 8 /* DBAT2U */
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lis 8, 0x1000 /* MEM2 */
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ori 8, 8, 0x07ff /* 64MiB */
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lis 9, 0x1000
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ori 9, 9, 0x0002 /* rw */
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mtspr 0x216, 8 /* IBAT3U */
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mtspr 0x217, 9 /* IBAT3L */
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mtspr 0x21e, 8 /* DBAT3U */
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mtspr 0x21f, 9 /* DBAT3L */
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/* enable the high BATs */
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mfspr 8, 0x3f3 /* HID4 */
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oris 8, 8, 0x0200
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mtspr 0x3f3, 8 /* HID4 */
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/* enable and invalidate the caches if not already enabled */
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mfspr 8, 0x3f0 /* HID0 */
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andi. 0, 8, (1<<15) /* HID0_ICE */
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bne 1f
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ori 8, 8, (1<<15)|(1<<11) /* HID0_ICE|HID0_ICFI*/
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1:
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andi. 0, 8, (1<<14) /* HID0_DCE */
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bne 1f
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ori 8, 8, (1<<14)|(1<<10) /* HID0_DCE|HID0_DCFI*/
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1:
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mtspr 0x3f0, 8 /* HID0 */
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isync
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/* initialize arguments */
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li 3, 0
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li 4, 0
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li 5, 0
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/* turn the MMU on */
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bcl 20, 31, 1f
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1:
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mflr 8
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addi 8, 8, _mmu_on - 1b
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mfmsr 9
128+
ori 9, 9, (1<<4)|(1<<5) /* MSR_DR|MSR_IR */
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mtsrr0 8
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mtsrr1 9
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sync
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rfi
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_mmu_on:
134+
/* turn on the front blue led (aka: yay! we got here!) */
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lis 8, 0x0d00
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ori 8, 8, 0x00c0
137+
lwz 9, 0(8)
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ori 9, 9, 0x20
139+
stw 9, 0(8)
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141+
b _zimage_start_lib
142+

‎arch/powerpc/boot/wii.c

Lines changed: 46 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,46 @@
1+
/*
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* arch/powerpc/boot/wii.c
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*
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* Nintendo Wii bootwrapper support
5+
* Copyright (C) 2008-2009 The GameCube Linux Team
6+
* Copyright (C) 2008,2009 Albert Herranz
7+
*
8+
* This program is free software; you can redistribute it and/or
9+
* modify it under the terms of the GNU General Public License
10+
* as published by the Free Software Foundation; either version 2
11+
* of the License, or (at your option) any later version.
12+
*
13+
*/
14+
15+
#include <stddef.h>
16+
#include "stdio.h"
17+
#include "types.h"
18+
#include "io.h"
19+
#include "ops.h"
20+
21+
#include "ugecon.h"
22+
23+
BSS_STACK(8192);
24+
25+
#define HW_REG(x) ((void *)(x))
26+
27+
#define EXI_CTRL HW_REG(0x0d800070)
28+
#define EXI_CTRL_ENABLE (1<<0)
29+
30+
void platform_init(unsigned long r3, unsigned long r4, unsigned long r5)
31+
{
32+
u32 heapsize = 24*1024*1024 - (u32)_end;
33+
34+
simple_alloc_init(_end, heapsize, 32, 64);
35+
fdt_init(_dtb_start);
36+
37+
/*
38+
* 'mini' boots the Broadway processor with EXI disabled.
39+
* We need it enabled before probing for the USB Gecko.
40+
*/
41+
out_be32(EXI_CTRL, in_be32(EXI_CTRL) | EXI_CTRL_ENABLE);
42+
43+
if (ug_probe())
44+
console_ops.write = ug_console_write;
45+
}
46+

‎arch/powerpc/boot/wrapper

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -230,7 +230,7 @@ xpedite52*)
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link_address='0x1400000'
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platformo=$object/cuboot-85xx.o
232232
;;
233-
gamecube)
233+
gamecube|wii)
234234
link_address='0x600000'
235235
platformo="$object/$platform-head.o $object/$platform.o"
236236
;;

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