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Commit | Line | Data |
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c021880a WD |
1 | /* |
2 | * (C) Copyright 2003 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * | |
1a459660 | 5 | * SPDX-License-Identifier: GPL-2.0+ |
c021880a WD |
6 | */ |
7 | ||
8 | #include <common.h> | |
c021880a | 9 | #include <image.h> |
c021880a WD |
10 | #include <asm/addrspace.h> |
11 | ||
d87080b7 WD |
12 | DECLARE_GLOBAL_DATA_PTR; |
13 | ||
c021880a WD |
14 | #define LINUX_MAX_ENVS 256 |
15 | #define LINUX_MAX_ARGS 256 | |
16 | ||
7a9d109b PB |
17 | #if defined(CONFIG_MALTA) |
18 | #define mips_boot_malta 1 | |
b87493f4 | 19 | #else |
7a9d109b | 20 | #define mips_boot_malta 0 |
b87493f4 DS |
21 | #endif |
22 | ||
e51a6b7a DS |
23 | static int linux_argc; |
24 | static char **linux_argv; | |
59e8cbdb | 25 | static char *linux_argp; |
c021880a | 26 | |
e51a6b7a DS |
27 | static char **linux_env; |
28 | static char *linux_env_p; | |
29 | static int linux_env_idx; | |
c021880a | 30 | |
f66cc1e3 DS |
31 | static ulong arch_get_sp(void) |
32 | { | |
33 | ulong ret; | |
34 | ||
35 | __asm__ __volatile__("move %0, $sp" : "=r"(ret) : ); | |
36 | ||
37 | return ret; | |
38 | } | |
39 | ||
40 | void arch_lmb_reserve(struct lmb *lmb) | |
41 | { | |
42 | ulong sp; | |
43 | ||
44 | sp = arch_get_sp(); | |
45 | debug("## Current stack ends at 0x%08lx\n", sp); | |
46 | ||
47 | /* adjust sp by 4K to be safe */ | |
48 | sp -= 4096; | |
49 | lmb_reserve(lmb, sp, CONFIG_SYS_SDRAM_BASE + gd->ram_size - sp); | |
50 | } | |
51 | ||
c9639421 DS |
52 | static int boot_setup_linux(bootm_headers_t *images) |
53 | { | |
54 | int ret; | |
55 | ulong rd_len; | |
56 | ||
57 | rd_len = images->rd_end - images->rd_start; | |
58 | ret = boot_ramdisk_high(&images->lmb, images->rd_start, | |
59 | rd_len, &images->initrd_start, &images->initrd_end); | |
60 | if (ret) | |
61 | return ret; | |
62 | ||
63 | return 0; | |
64 | } | |
65 | ||
59e8cbdb DS |
66 | static void linux_cmdline_init(void) |
67 | { | |
68 | linux_argc = 1; | |
69 | linux_argv = (char **)UNCACHED_SDRAM(gd->bd->bi_boot_params); | |
70 | linux_argv[0] = 0; | |
71 | linux_argp = (char *)(linux_argv + LINUX_MAX_ARGS); | |
72 | } | |
73 | ||
74 | static void linux_cmdline_set(const char *value, size_t len) | |
75 | { | |
76 | linux_argv[linux_argc] = linux_argp; | |
77 | memcpy(linux_argp, value, len); | |
78 | linux_argp[len] = 0; | |
79 | ||
80 | linux_argp += len + 1; | |
81 | linux_argc++; | |
82 | } | |
83 | ||
84 | static void linux_cmdline_dump(void) | |
85 | { | |
86 | int i; | |
87 | ||
88 | debug("## cmdline argv at 0x%p, argp at 0x%p\n", | |
89 | linux_argv, linux_argp); | |
90 | ||
91 | for (i = 1; i < linux_argc; i++) | |
92 | debug(" arg %03d: %s\n", i, linux_argv[i]); | |
93 | } | |
94 | ||
95 | static void boot_cmdline_linux(bootm_headers_t *images) | |
96 | { | |
97 | const char *bootargs, *next, *quote; | |
98 | ||
99 | linux_cmdline_init(); | |
100 | ||
101 | bootargs = getenv("bootargs"); | |
102 | if (!bootargs) | |
103 | return; | |
104 | ||
105 | next = bootargs; | |
106 | ||
107 | while (bootargs && *bootargs && linux_argc < LINUX_MAX_ARGS) { | |
108 | quote = strchr(bootargs, '"'); | |
109 | next = strchr(bootargs, ' '); | |
110 | ||
111 | while (next && quote && quote < next) { | |
112 | /* | |
113 | * we found a left quote before the next blank | |
114 | * now we have to find the matching right quote | |
115 | */ | |
116 | next = strchr(quote + 1, '"'); | |
117 | if (next) { | |
118 | quote = strchr(next + 1, '"'); | |
119 | next = strchr(next + 1, ' '); | |
120 | } | |
121 | } | |
122 | ||
123 | if (!next) | |
124 | next = bootargs + strlen(bootargs); | |
125 | ||
126 | linux_cmdline_set(bootargs, next - bootargs); | |
127 | ||
128 | if (*next) | |
129 | next++; | |
130 | ||
131 | bootargs = next; | |
132 | } | |
133 | ||
134 | linux_cmdline_dump(); | |
135 | } | |
136 | ||
15f8aa90 DS |
137 | static void linux_env_init(void) |
138 | { | |
139 | linux_env = (char **)(((ulong) linux_argp + 15) & ~15); | |
140 | linux_env[0] = 0; | |
141 | linux_env_p = (char *)(linux_env + LINUX_MAX_ENVS); | |
142 | linux_env_idx = 0; | |
143 | } | |
144 | ||
145 | static void linux_env_set(const char *env_name, const char *env_val) | |
146 | { | |
147 | if (linux_env_idx < LINUX_MAX_ENVS - 1) { | |
148 | linux_env[linux_env_idx] = linux_env_p; | |
149 | ||
150 | strcpy(linux_env_p, env_name); | |
151 | linux_env_p += strlen(env_name); | |
152 | ||
7a9d109b | 153 | if (mips_boot_malta) { |
b87493f4 DS |
154 | linux_env_p++; |
155 | linux_env[++linux_env_idx] = linux_env_p; | |
156 | } else { | |
157 | *linux_env_p++ = '='; | |
158 | } | |
15f8aa90 DS |
159 | |
160 | strcpy(linux_env_p, env_val); | |
161 | linux_env_p += strlen(env_val); | |
162 | ||
163 | linux_env_p++; | |
164 | linux_env[++linux_env_idx] = 0; | |
165 | } | |
166 | } | |
167 | ||
0ea7213f | 168 | static void boot_prep_linux(bootm_headers_t *images) |
c021880a | 169 | { |
e51a6b7a | 170 | char env_buf[12]; |
15f8aa90 | 171 | const char *cp; |
6c154552 | 172 | ulong rd_start, rd_size; |
5da627a4 WD |
173 | |
174 | #ifdef CONFIG_MEMSIZE_IN_BYTES | |
e51a6b7a DS |
175 | sprintf(env_buf, "%lu", (ulong)gd->ram_size); |
176 | debug("## Giving linux memsize in bytes, %lu\n", (ulong)gd->ram_size); | |
5da627a4 | 177 | #else |
e51a6b7a DS |
178 | sprintf(env_buf, "%lu", (ulong)(gd->ram_size >> 20)); |
179 | debug("## Giving linux memsize in MB, %lu\n", | |
45bde489 | 180 | (ulong)(gd->ram_size >> 20)); |
5da627a4 | 181 | #endif /* CONFIG_MEMSIZE_IN_BYTES */ |
c021880a | 182 | |
6c154552 DS |
183 | rd_start = UNCACHED_SDRAM(images->initrd_start); |
184 | rd_size = images->initrd_end - images->initrd_start; | |
185 | ||
15f8aa90 DS |
186 | linux_env_init(); |
187 | ||
e51a6b7a | 188 | linux_env_set("memsize", env_buf); |
c021880a | 189 | |
6c154552 | 190 | sprintf(env_buf, "0x%08lX", rd_start); |
e51a6b7a | 191 | linux_env_set("initrd_start", env_buf); |
c021880a | 192 | |
6c154552 | 193 | sprintf(env_buf, "0x%lX", rd_size); |
e51a6b7a | 194 | linux_env_set("initrd_size", env_buf); |
c021880a | 195 | |
e51a6b7a DS |
196 | sprintf(env_buf, "0x%08X", (uint) (gd->bd->bi_flashstart)); |
197 | linux_env_set("flash_start", env_buf); | |
c021880a | 198 | |
e51a6b7a DS |
199 | sprintf(env_buf, "0x%X", (uint) (gd->bd->bi_flashsize)); |
200 | linux_env_set("flash_size", env_buf); | |
c021880a | 201 | |
e7c37452 | 202 | cp = getenv("ethaddr"); |
e51a6b7a | 203 | if (cp) |
e7c37452 | 204 | linux_env_set("ethaddr", cp); |
e7c37452 JM |
205 | |
206 | cp = getenv("eth1addr"); | |
e51a6b7a | 207 | if (cp) |
e7c37452 | 208 | linux_env_set("eth1addr", cp); |
b87493f4 | 209 | |
d18d49d7 PB |
210 | if (mips_boot_malta) { |
211 | sprintf(env_buf, "%un8r", gd->baudrate); | |
212 | linux_env_set("modetty0", env_buf); | |
213 | } | |
0ea7213f GJ |
214 | } |
215 | ||
216 | static void boot_jump_linux(bootm_headers_t *images) | |
217 | { | |
c4b37847 DS |
218 | typedef void __noreturn (*kernel_entry_t)(int, ulong, ulong, ulong); |
219 | kernel_entry_t kernel = (kernel_entry_t) images->ep; | |
b87493f4 | 220 | ulong linux_extra = 0; |
0ea7213f | 221 | |
c4b37847 | 222 | debug("## Transferring control to Linux (at address %p) ...\n", kernel); |
0ea7213f GJ |
223 | |
224 | bootstage_mark(BOOTSTAGE_ID_RUN_OS); | |
225 | ||
7a9d109b | 226 | if (mips_boot_malta) |
b87493f4 DS |
227 | linux_extra = gd->ram_size; |
228 | ||
0ea7213f GJ |
229 | /* we assume that the kernel is in place */ |
230 | printf("\nStarting kernel ...\n\n"); | |
231 | ||
b87493f4 | 232 | kernel(linux_argc, (ulong)linux_argv, (ulong)linux_env, linux_extra); |
0ea7213f GJ |
233 | } |
234 | ||
235 | int do_bootm_linux(int flag, int argc, char * const argv[], | |
236 | bootm_headers_t *images) | |
237 | { | |
c9639421 DS |
238 | int ret; |
239 | ||
9c170e2e | 240 | /* No need for those on MIPS */ |
59e8cbdb | 241 | if (flag & BOOTM_STATE_OS_BD_T) |
9c170e2e GJ |
242 | return -1; |
243 | ||
59e8cbdb DS |
244 | if (flag & BOOTM_STATE_OS_CMDLINE) { |
245 | boot_cmdline_linux(images); | |
246 | return 0; | |
247 | } | |
248 | ||
9c170e2e GJ |
249 | if (flag & BOOTM_STATE_OS_PREP) { |
250 | boot_prep_linux(images); | |
251 | return 0; | |
252 | } | |
253 | ||
254 | if (flag & BOOTM_STATE_OS_GO) { | |
255 | boot_jump_linux(images); | |
256 | return 0; | |
257 | } | |
e7c37452 | 258 | |
c9639421 DS |
259 | ret = boot_setup_linux(images); |
260 | if (ret) | |
261 | return ret; | |
262 | ||
59e8cbdb | 263 | boot_cmdline_linux(images); |
0ea7213f | 264 | boot_prep_linux(images); |
e08634c7 | 265 | boot_jump_linux(images); |
c021880a | 266 | |
cd7c596e | 267 | /* does not return */ |
40d7e99d | 268 | return 1; |
c021880a | 269 | } |