]>
git.ipfire.org Git - people/ms/u-boot.git/blob - arch/mips/lib/bootm.c
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
10 #include <asm/addrspace.h>
12 DECLARE_GLOBAL_DATA_PTR
;
14 #define LINUX_MAX_ENVS 256
15 #define LINUX_MAX_ARGS 256
17 #if defined(CONFIG_MALTA)
18 #define mips_boot_malta 1
20 #define mips_boot_malta 0
23 static int linux_argc
;
24 static char **linux_argv
;
25 static char *linux_argp
;
27 static char **linux_env
;
28 static char *linux_env_p
;
29 static int linux_env_idx
;
31 static ulong
arch_get_sp(void)
35 __asm__
__volatile__("move %0, $sp" : "=r"(ret
) : );
40 void arch_lmb_reserve(struct lmb
*lmb
)
45 debug("## Current stack ends at 0x%08lx\n", sp
);
47 /* adjust sp by 4K to be safe */
49 lmb_reserve(lmb
, sp
, CONFIG_SYS_SDRAM_BASE
+ gd
->ram_size
- sp
);
52 static int boot_setup_linux(bootm_headers_t
*images
)
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
);
66 static void linux_cmdline_init(void)
69 linux_argv
= (char **)UNCACHED_SDRAM(gd
->bd
->bi_boot_params
);
71 linux_argp
= (char *)(linux_argv
+ LINUX_MAX_ARGS
);
74 static void linux_cmdline_set(const char *value
, size_t len
)
76 linux_argv
[linux_argc
] = linux_argp
;
77 memcpy(linux_argp
, value
, len
);
80 linux_argp
+= len
+ 1;
84 static void linux_cmdline_dump(void)
88 debug("## cmdline argv at 0x%p, argp at 0x%p\n",
89 linux_argv
, linux_argp
);
91 for (i
= 1; i
< linux_argc
; i
++)
92 debug(" arg %03d: %s\n", i
, linux_argv
[i
]);
95 static void boot_cmdline_linux(bootm_headers_t
*images
)
97 const char *bootargs
, *next
, *quote
;
101 bootargs
= getenv("bootargs");
107 while (bootargs
&& *bootargs
&& linux_argc
< LINUX_MAX_ARGS
) {
108 quote
= strchr(bootargs
, '"');
109 next
= strchr(bootargs
, ' ');
111 while (next
&& quote
&& quote
< next
) {
113 * we found a left quote before the next blank
114 * now we have to find the matching right quote
116 next
= strchr(quote
+ 1, '"');
118 quote
= strchr(next
+ 1, '"');
119 next
= strchr(next
+ 1, ' ');
124 next
= bootargs
+ strlen(bootargs
);
126 linux_cmdline_set(bootargs
, next
- bootargs
);
134 linux_cmdline_dump();
137 static void linux_env_init(void)
139 linux_env
= (char **)(((ulong
) linux_argp
+ 15) & ~15);
141 linux_env_p
= (char *)(linux_env
+ LINUX_MAX_ENVS
);
145 static void linux_env_set(const char *env_name
, const char *env_val
)
147 if (linux_env_idx
< LINUX_MAX_ENVS
- 1) {
148 linux_env
[linux_env_idx
] = linux_env_p
;
150 strcpy(linux_env_p
, env_name
);
151 linux_env_p
+= strlen(env_name
);
153 if (mips_boot_malta
) {
155 linux_env
[++linux_env_idx
] = linux_env_p
;
157 *linux_env_p
++ = '=';
160 strcpy(linux_env_p
, env_val
);
161 linux_env_p
+= strlen(env_val
);
164 linux_env
[++linux_env_idx
] = 0;
168 static void boot_prep_linux(bootm_headers_t
*images
)
172 ulong rd_start
, rd_size
;
174 #ifdef CONFIG_MEMSIZE_IN_BYTES
175 sprintf(env_buf
, "%lu", (ulong
)gd
->ram_size
);
176 debug("## Giving linux memsize in bytes, %lu\n", (ulong
)gd
->ram_size
);
178 sprintf(env_buf
, "%lu", (ulong
)(gd
->ram_size
>> 20));
179 debug("## Giving linux memsize in MB, %lu\n",
180 (ulong
)(gd
->ram_size
>> 20));
181 #endif /* CONFIG_MEMSIZE_IN_BYTES */
183 rd_start
= UNCACHED_SDRAM(images
->initrd_start
);
184 rd_size
= images
->initrd_end
- images
->initrd_start
;
188 linux_env_set("memsize", env_buf
);
190 sprintf(env_buf
, "0x%08lX", rd_start
);
191 linux_env_set("initrd_start", env_buf
);
193 sprintf(env_buf
, "0x%lX", rd_size
);
194 linux_env_set("initrd_size", env_buf
);
196 sprintf(env_buf
, "0x%08X", (uint
) (gd
->bd
->bi_flashstart
));
197 linux_env_set("flash_start", env_buf
);
199 sprintf(env_buf
, "0x%X", (uint
) (gd
->bd
->bi_flashsize
));
200 linux_env_set("flash_size", env_buf
);
202 cp
= getenv("ethaddr");
204 linux_env_set("ethaddr", cp
);
206 cp
= getenv("eth1addr");
208 linux_env_set("eth1addr", cp
);
210 if (mips_boot_malta
) {
211 sprintf(env_buf
, "%un8r", gd
->baudrate
);
212 linux_env_set("modetty0", env_buf
);
216 static void boot_jump_linux(bootm_headers_t
*images
)
218 typedef void __noreturn (*kernel_entry_t
)(int, ulong
, ulong
, ulong
);
219 kernel_entry_t kernel
= (kernel_entry_t
) images
->ep
;
220 ulong linux_extra
= 0;
222 debug("## Transferring control to Linux (at address %p) ...\n", kernel
);
224 bootstage_mark(BOOTSTAGE_ID_RUN_OS
);
227 linux_extra
= gd
->ram_size
;
229 /* we assume that the kernel is in place */
230 printf("\nStarting kernel ...\n\n");
232 kernel(linux_argc
, (ulong
)linux_argv
, (ulong
)linux_env
, linux_extra
);
235 int do_bootm_linux(int flag
, int argc
, char * const argv
[],
236 bootm_headers_t
*images
)
240 /* No need for those on MIPS */
241 if (flag
& BOOTM_STATE_OS_BD_T
)
244 if (flag
& BOOTM_STATE_OS_CMDLINE
) {
245 boot_cmdline_linux(images
);
249 if (flag
& BOOTM_STATE_OS_PREP
) {
250 boot_prep_linux(images
);
254 if (flag
& BOOTM_STATE_OS_GO
) {
255 boot_jump_linux(images
);
259 ret
= boot_setup_linux(images
);
263 boot_cmdline_linux(images
);
264 boot_prep_linux(images
);
265 boot_jump_linux(images
);
267 /* does not return */