1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * arch/powerpc/boot/wii.c
5 * Nintendo Wii bootwrapper support
6 * Copyright (C) 2008-2009 The GameCube Linux Team
7 * Copyright (C) 2008,2009 Albert Herranz
20 #define HW_REG(x) ((void *)(x))
22 #define EXI_CTRL HW_REG(0x0d800070)
23 #define EXI_CTRL_ENABLE (1<<0)
25 #define MEM2_TOP (0x10000000 + 64*1024*1024)
26 #define FIRMWARE_DEFAULT_SIZE (12*1024*1024)
39 static int mipc_check_address(u32 pa)
41 /* only MEM2 addresses */
42 if (pa < 0x10000000 || pa > 0x14000000)
47 static struct mipc_infohdr *mipc_get_infohdr(void)
49 struct mipc_infohdr **hdrp, *hdr;
51 /* 'mini' header pointer is the last word of MEM2 memory */
52 hdrp = (struct mipc_infohdr **)0x13fffffc;
53 if (mipc_check_address((u32)hdrp)) {
54 printf("mini: invalid hdrp %08X\n", (u32)hdrp);
60 if (mipc_check_address((u32)hdr)) {
61 printf("mini: invalid hdr %08X\n", (u32)hdr);
65 if (memcmp(hdr->magic, "IPC", 3)) {
66 printf("mini: invalid magic\n");
75 static int mipc_get_mem2_boundary(u32 *mem2_boundary)
77 struct mipc_infohdr *hdr;
80 hdr = mipc_get_infohdr();
86 if (mipc_check_address(hdr->mem2_boundary)) {
87 printf("mini: invalid mem2_boundary %08X\n",
92 *mem2_boundary = hdr->mem2_boundary;
99 static void platform_fixups(void)
107 mem = finddevice("/memory");
109 fatal("Can't find memory node\n");
111 /* two ranges of (address, size) words */
112 len = getprop(mem, "reg", reg, sizeof(reg));
113 if (len != sizeof(reg)) {
118 /* retrieve MEM2 boundary from 'mini' */
119 error = mipc_get_mem2_boundary(&mem2_boundary);
121 /* if that fails use a sane value */
122 mem2_boundary = MEM2_TOP - FIRMWARE_DEFAULT_SIZE;
125 if (mem2_boundary > reg[2] && mem2_boundary < reg[2] + reg[3]) {
126 reg[3] = mem2_boundary - reg[2];
127 printf("top of MEM2 @ %08X\n", reg[2] + reg[3]);
128 setprop(mem, "reg", reg, sizeof(reg));
135 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5)
137 u32 heapsize = 24*1024*1024 - (u32)_end;
139 simple_alloc_init(_end, heapsize, 32, 64);
140 fdt_init(_dtb_start);
143 * 'mini' boots the Broadway processor with EXI disabled.
144 * We need it enabled before probing for the USB Gecko.
146 out_be32(EXI_CTRL, in_be32(EXI_CTRL) | EXI_CTRL_ENABLE);
149 console_ops.write = ug_console_write;
151 platform_ops.fixups = platform_fixups;