1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * arch/powerpc/boot/wii.c
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Nintendo Wii bootwrapper support
6*4882a593Smuzhiyun * Copyright (C) 2008-2009 The GameCube Linux Team
7*4882a593Smuzhiyun * Copyright (C) 2008,2009 Albert Herranz
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <stddef.h>
11*4882a593Smuzhiyun #include "stdio.h"
12*4882a593Smuzhiyun #include "types.h"
13*4882a593Smuzhiyun #include "io.h"
14*4882a593Smuzhiyun #include "ops.h"
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #include "ugecon.h"
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun BSS_STACK(8192);
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun #define HW_REG(x) ((void *)(x))
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun #define EXI_CTRL HW_REG(0x0d800070)
23*4882a593Smuzhiyun #define EXI_CTRL_ENABLE (1<<0)
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun #define MEM2_TOP (0x10000000 + 64*1024*1024)
26*4882a593Smuzhiyun #define FIRMWARE_DEFAULT_SIZE (12*1024*1024)
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun struct mipc_infohdr {
30*4882a593Smuzhiyun char magic[3];
31*4882a593Smuzhiyun u8 version;
32*4882a593Smuzhiyun u32 mem2_boundary;
33*4882a593Smuzhiyun u32 ipc_in;
34*4882a593Smuzhiyun size_t ipc_in_size;
35*4882a593Smuzhiyun u32 ipc_out;
36*4882a593Smuzhiyun size_t ipc_out_size;
37*4882a593Smuzhiyun };
38*4882a593Smuzhiyun
mipc_check_address(u32 pa)39*4882a593Smuzhiyun static int mipc_check_address(u32 pa)
40*4882a593Smuzhiyun {
41*4882a593Smuzhiyun /* only MEM2 addresses */
42*4882a593Smuzhiyun if (pa < 0x10000000 || pa > 0x14000000)
43*4882a593Smuzhiyun return -EINVAL;
44*4882a593Smuzhiyun return 0;
45*4882a593Smuzhiyun }
46*4882a593Smuzhiyun
mipc_get_infohdr(void)47*4882a593Smuzhiyun static struct mipc_infohdr *mipc_get_infohdr(void)
48*4882a593Smuzhiyun {
49*4882a593Smuzhiyun struct mipc_infohdr **hdrp, *hdr;
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun /* 'mini' header pointer is the last word of MEM2 memory */
52*4882a593Smuzhiyun hdrp = (struct mipc_infohdr **)0x13fffffc;
53*4882a593Smuzhiyun if (mipc_check_address((u32)hdrp)) {
54*4882a593Smuzhiyun printf("mini: invalid hdrp %08X\n", (u32)hdrp);
55*4882a593Smuzhiyun hdr = NULL;
56*4882a593Smuzhiyun goto out;
57*4882a593Smuzhiyun }
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun hdr = *hdrp;
60*4882a593Smuzhiyun if (mipc_check_address((u32)hdr)) {
61*4882a593Smuzhiyun printf("mini: invalid hdr %08X\n", (u32)hdr);
62*4882a593Smuzhiyun hdr = NULL;
63*4882a593Smuzhiyun goto out;
64*4882a593Smuzhiyun }
65*4882a593Smuzhiyun if (memcmp(hdr->magic, "IPC", 3)) {
66*4882a593Smuzhiyun printf("mini: invalid magic\n");
67*4882a593Smuzhiyun hdr = NULL;
68*4882a593Smuzhiyun goto out;
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun out:
72*4882a593Smuzhiyun return hdr;
73*4882a593Smuzhiyun }
74*4882a593Smuzhiyun
mipc_get_mem2_boundary(u32 * mem2_boundary)75*4882a593Smuzhiyun static int mipc_get_mem2_boundary(u32 *mem2_boundary)
76*4882a593Smuzhiyun {
77*4882a593Smuzhiyun struct mipc_infohdr *hdr;
78*4882a593Smuzhiyun int error;
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun hdr = mipc_get_infohdr();
81*4882a593Smuzhiyun if (!hdr) {
82*4882a593Smuzhiyun error = -1;
83*4882a593Smuzhiyun goto out;
84*4882a593Smuzhiyun }
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun if (mipc_check_address(hdr->mem2_boundary)) {
87*4882a593Smuzhiyun printf("mini: invalid mem2_boundary %08X\n",
88*4882a593Smuzhiyun hdr->mem2_boundary);
89*4882a593Smuzhiyun error = -EINVAL;
90*4882a593Smuzhiyun goto out;
91*4882a593Smuzhiyun }
92*4882a593Smuzhiyun *mem2_boundary = hdr->mem2_boundary;
93*4882a593Smuzhiyun error = 0;
94*4882a593Smuzhiyun out:
95*4882a593Smuzhiyun return error;
96*4882a593Smuzhiyun
97*4882a593Smuzhiyun }
98*4882a593Smuzhiyun
platform_fixups(void)99*4882a593Smuzhiyun static void platform_fixups(void)
100*4882a593Smuzhiyun {
101*4882a593Smuzhiyun void *mem;
102*4882a593Smuzhiyun u32 reg[4];
103*4882a593Smuzhiyun u32 mem2_boundary;
104*4882a593Smuzhiyun int len;
105*4882a593Smuzhiyun int error;
106*4882a593Smuzhiyun
107*4882a593Smuzhiyun mem = finddevice("/memory");
108*4882a593Smuzhiyun if (!mem)
109*4882a593Smuzhiyun fatal("Can't find memory node\n");
110*4882a593Smuzhiyun
111*4882a593Smuzhiyun /* two ranges of (address, size) words */
112*4882a593Smuzhiyun len = getprop(mem, "reg", reg, sizeof(reg));
113*4882a593Smuzhiyun if (len != sizeof(reg)) {
114*4882a593Smuzhiyun /* nothing to do */
115*4882a593Smuzhiyun goto out;
116*4882a593Smuzhiyun }
117*4882a593Smuzhiyun
118*4882a593Smuzhiyun /* retrieve MEM2 boundary from 'mini' */
119*4882a593Smuzhiyun error = mipc_get_mem2_boundary(&mem2_boundary);
120*4882a593Smuzhiyun if (error) {
121*4882a593Smuzhiyun /* if that fails use a sane value */
122*4882a593Smuzhiyun mem2_boundary = MEM2_TOP - FIRMWARE_DEFAULT_SIZE;
123*4882a593Smuzhiyun }
124*4882a593Smuzhiyun
125*4882a593Smuzhiyun if (mem2_boundary > reg[2] && mem2_boundary < reg[2] + reg[3]) {
126*4882a593Smuzhiyun reg[3] = mem2_boundary - reg[2];
127*4882a593Smuzhiyun printf("top of MEM2 @ %08X\n", reg[2] + reg[3]);
128*4882a593Smuzhiyun setprop(mem, "reg", reg, sizeof(reg));
129*4882a593Smuzhiyun }
130*4882a593Smuzhiyun
131*4882a593Smuzhiyun out:
132*4882a593Smuzhiyun return;
133*4882a593Smuzhiyun }
134*4882a593Smuzhiyun
platform_init(unsigned long r3,unsigned long r4,unsigned long r5)135*4882a593Smuzhiyun void platform_init(unsigned long r3, unsigned long r4, unsigned long r5)
136*4882a593Smuzhiyun {
137*4882a593Smuzhiyun u32 heapsize = 24*1024*1024 - (u32)_end;
138*4882a593Smuzhiyun
139*4882a593Smuzhiyun simple_alloc_init(_end, heapsize, 32, 64);
140*4882a593Smuzhiyun fdt_init(_dtb_start);
141*4882a593Smuzhiyun
142*4882a593Smuzhiyun /*
143*4882a593Smuzhiyun * 'mini' boots the Broadway processor with EXI disabled.
144*4882a593Smuzhiyun * We need it enabled before probing for the USB Gecko.
145*4882a593Smuzhiyun */
146*4882a593Smuzhiyun out_be32(EXI_CTRL, in_be32(EXI_CTRL) | EXI_CTRL_ENABLE);
147*4882a593Smuzhiyun
148*4882a593Smuzhiyun if (ug_probe())
149*4882a593Smuzhiyun console_ops.write = ug_console_write;
150*4882a593Smuzhiyun
151*4882a593Smuzhiyun platform_ops.fixups = platform_fixups;
152*4882a593Smuzhiyun }
153*4882a593Smuzhiyun
154