Commit | Line | Data |
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6cdd2417 AH |
1 | /* |
2 | * arch/powerpc/boot/wii.c | |
3 | * | |
4 | * 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 | ||
02d748a9 | 25 | #define HW_REG(x) ((void *)(x)) |
6cdd2417 | 26 | |
02d748a9 AH |
27 | #define EXI_CTRL HW_REG(0x0d800070) |
28 | #define EXI_CTRL_ENABLE (1<<0) | |
29 | ||
30 | #define MEM2_TOP (0x10000000 + 64*1024*1024) | |
31 | #define FIRMWARE_DEFAULT_SIZE (12*1024*1024) | |
32 | ||
33 | ||
34 | struct mipc_infohdr { | |
35 | char magic[3]; | |
36 | u8 version; | |
37 | u32 mem2_boundary; | |
38 | u32 ipc_in; | |
39 | size_t ipc_in_size; | |
40 | u32 ipc_out; | |
41 | size_t ipc_out_size; | |
42 | }; | |
43 | ||
44 | static int mipc_check_address(u32 pa) | |
45 | { | |
46 | /* only MEM2 addresses */ | |
47 | if (pa < 0x10000000 || pa > 0x14000000) | |
48 | return -EINVAL; | |
49 | return 0; | |
50 | } | |
51 | ||
52 | static struct mipc_infohdr *mipc_get_infohdr(void) | |
53 | { | |
54 | struct mipc_infohdr **hdrp, *hdr; | |
55 | ||
56 | /* 'mini' header pointer is the last word of MEM2 memory */ | |
57 | hdrp = (struct mipc_infohdr **)0x13fffffc; | |
58 | if (mipc_check_address((u32)hdrp)) { | |
59 | printf("mini: invalid hdrp %08X\n", (u32)hdrp); | |
60 | hdr = NULL; | |
61 | goto out; | |
62 | } | |
63 | ||
64 | hdr = *hdrp; | |
65 | if (mipc_check_address((u32)hdr)) { | |
66 | printf("mini: invalid hdr %08X\n", (u32)hdr); | |
67 | hdr = NULL; | |
68 | goto out; | |
69 | } | |
70 | if (memcmp(hdr->magic, "IPC", 3)) { | |
71 | printf("mini: invalid magic\n"); | |
72 | hdr = NULL; | |
73 | goto out; | |
74 | } | |
75 | ||
76 | out: | |
77 | return hdr; | |
78 | } | |
79 | ||
80 | static int mipc_get_mem2_boundary(u32 *mem2_boundary) | |
81 | { | |
82 | struct mipc_infohdr *hdr; | |
83 | int error; | |
84 | ||
85 | hdr = mipc_get_infohdr(); | |
86 | if (!hdr) { | |
87 | error = -1; | |
88 | goto out; | |
89 | } | |
90 | ||
91 | if (mipc_check_address(hdr->mem2_boundary)) { | |
92 | printf("mini: invalid mem2_boundary %08X\n", | |
93 | hdr->mem2_boundary); | |
94 | error = -EINVAL; | |
95 | goto out; | |
96 | } | |
97 | *mem2_boundary = hdr->mem2_boundary; | |
98 | error = 0; | |
99 | out: | |
100 | return error; | |
101 | ||
102 | } | |
103 | ||
104 | static void platform_fixups(void) | |
105 | { | |
106 | void *mem; | |
107 | u32 reg[4]; | |
108 | u32 mem2_boundary; | |
109 | int len; | |
110 | int error; | |
111 | ||
112 | mem = finddevice("/memory"); | |
113 | if (!mem) | |
114 | fatal("Can't find memory node\n"); | |
115 | ||
116 | /* two ranges of (address, size) words */ | |
117 | len = getprop(mem, "reg", reg, sizeof(reg)); | |
118 | if (len != sizeof(reg)) { | |
119 | /* nothing to do */ | |
120 | goto out; | |
121 | } | |
122 | ||
123 | /* retrieve MEM2 boundary from 'mini' */ | |
124 | error = mipc_get_mem2_boundary(&mem2_boundary); | |
125 | if (error) { | |
126 | /* if that fails use a sane value */ | |
127 | mem2_boundary = MEM2_TOP - FIRMWARE_DEFAULT_SIZE; | |
128 | } | |
129 | ||
130 | if (mem2_boundary > reg[2] && mem2_boundary < reg[2] + reg[3]) { | |
131 | reg[3] = mem2_boundary - reg[2]; | |
132 | printf("top of MEM2 @ %08X\n", reg[2] + reg[3]); | |
133 | setprop(mem, "reg", reg, sizeof(reg)); | |
134 | } | |
135 | ||
136 | out: | |
137 | return; | |
138 | } | |
6cdd2417 AH |
139 | |
140 | void platform_init(unsigned long r3, unsigned long r4, unsigned long r5) | |
141 | { | |
142 | u32 heapsize = 24*1024*1024 - (u32)_end; | |
143 | ||
144 | simple_alloc_init(_end, heapsize, 32, 64); | |
145 | fdt_init(_dtb_start); | |
146 | ||
147 | /* | |
148 | * 'mini' boots the Broadway processor with EXI disabled. | |
149 | * We need it enabled before probing for the USB Gecko. | |
150 | */ | |
151 | out_be32(EXI_CTRL, in_be32(EXI_CTRL) | EXI_CTRL_ENABLE); | |
152 | ||
153 | if (ug_probe()) | |
154 | console_ops.write = ug_console_write; | |
02d748a9 AH |
155 | |
156 | platform_ops.fixups = platform_fixups; | |
6cdd2417 AH |
157 | } |
158 |