]>
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+
11 #include <u-boot/zlib.h>
12 #include <asm/byteorder.h>
13 #include <asm/addrspace.h>
15 DECLARE_GLOBAL_DATA_PTR
;
17 #define LINUX_MAX_ENVS 256
18 #define LINUX_MAX_ARGS 256
20 #if defined(CONFIG_MALTA)
21 #define mips_boot_malta 1
23 #define mips_boot_malta 0
26 static int linux_argc
;
27 static char **linux_argv
;
28 static char *linux_argp
;
30 static char **linux_env
;
31 static char *linux_env_p
;
32 static int linux_env_idx
;
34 static ulong
arch_get_sp(void)
38 __asm__
__volatile__("move %0, $sp" : "=r"(ret
) : );
43 void arch_lmb_reserve(struct lmb
*lmb
)
48 debug("## Current stack ends at 0x%08lx\n", sp
);
50 /* adjust sp by 4K to be safe */
52 lmb_reserve(lmb
, sp
, CONFIG_SYS_SDRAM_BASE
+ gd
->ram_size
- sp
);
55 static void linux_cmdline_init(void)
58 linux_argv
= (char **)UNCACHED_SDRAM(gd
->bd
->bi_boot_params
);
60 linux_argp
= (char *)(linux_argv
+ LINUX_MAX_ARGS
);
63 static void linux_cmdline_set(const char *value
, size_t len
)
65 linux_argv
[linux_argc
] = linux_argp
;
66 memcpy(linux_argp
, value
, len
);
69 linux_argp
+= len
+ 1;
73 static void linux_cmdline_dump(void)
77 debug("## cmdline argv at 0x%p, argp at 0x%p\n",
78 linux_argv
, linux_argp
);
80 for (i
= 1; i
< linux_argc
; i
++)
81 debug(" arg %03d: %s\n", i
, linux_argv
[i
]);
84 static void boot_cmdline_linux(bootm_headers_t
*images
)
86 const char *bootargs
, *next
, *quote
;
90 bootargs
= getenv("bootargs");
96 while (bootargs
&& *bootargs
&& linux_argc
< LINUX_MAX_ARGS
) {
97 quote
= strchr(bootargs
, '"');
98 next
= strchr(bootargs
, ' ');
100 while (next
&& quote
&& quote
< next
) {
102 * we found a left quote before the next blank
103 * now we have to find the matching right quote
105 next
= strchr(quote
+ 1, '"');
107 quote
= strchr(next
+ 1, '"');
108 next
= strchr(next
+ 1, ' ');
113 next
= bootargs
+ strlen(bootargs
);
115 linux_cmdline_set(bootargs
, next
- bootargs
);
123 linux_cmdline_dump();
126 static void linux_env_init(void)
128 linux_env
= (char **)(((ulong
) linux_argp
+ 15) & ~15);
130 linux_env_p
= (char *)(linux_env
+ LINUX_MAX_ENVS
);
134 static void linux_env_set(const char *env_name
, const char *env_val
)
136 if (linux_env_idx
< LINUX_MAX_ENVS
- 1) {
137 linux_env
[linux_env_idx
] = linux_env_p
;
139 strcpy(linux_env_p
, env_name
);
140 linux_env_p
+= strlen(env_name
);
142 if (mips_boot_malta
) {
144 linux_env
[++linux_env_idx
] = linux_env_p
;
146 *linux_env_p
++ = '=';
149 strcpy(linux_env_p
, env_val
);
150 linux_env_p
+= strlen(env_val
);
153 linux_env
[++linux_env_idx
] = 0;
157 static void boot_prep_linux(bootm_headers_t
*images
)
161 ulong rd_start
, rd_size
;
163 #ifdef CONFIG_MEMSIZE_IN_BYTES
164 sprintf(env_buf
, "%lu", (ulong
)gd
->ram_size
);
165 debug("## Giving linux memsize in bytes, %lu\n", (ulong
)gd
->ram_size
);
167 sprintf(env_buf
, "%lu", (ulong
)(gd
->ram_size
>> 20));
168 debug("## Giving linux memsize in MB, %lu\n",
169 (ulong
)(gd
->ram_size
>> 20));
170 #endif /* CONFIG_MEMSIZE_IN_BYTES */
172 rd_start
= UNCACHED_SDRAM(images
->initrd_start
);
173 rd_size
= images
->initrd_end
- images
->initrd_start
;
177 linux_env_set("memsize", env_buf
);
179 sprintf(env_buf
, "0x%08lX", rd_start
);
180 linux_env_set("initrd_start", env_buf
);
182 sprintf(env_buf
, "0x%lX", rd_size
);
183 linux_env_set("initrd_size", env_buf
);
185 sprintf(env_buf
, "0x%08X", (uint
) (gd
->bd
->bi_flashstart
));
186 linux_env_set("flash_start", env_buf
);
188 sprintf(env_buf
, "0x%X", (uint
) (gd
->bd
->bi_flashsize
));
189 linux_env_set("flash_size", env_buf
);
191 cp
= getenv("ethaddr");
193 linux_env_set("ethaddr", cp
);
195 cp
= getenv("eth1addr");
197 linux_env_set("eth1addr", cp
);
199 if (mips_boot_malta
) {
200 sprintf(env_buf
, "%un8r", gd
->baudrate
);
201 linux_env_set("modetty0", env_buf
);
205 static void boot_jump_linux(bootm_headers_t
*images
)
207 typedef void __noreturn (*kernel_entry_t
)(int, ulong
, ulong
, ulong
);
208 kernel_entry_t kernel
= (kernel_entry_t
) images
->ep
;
209 ulong linux_extra
= 0;
211 debug("## Transferring control to Linux (at address %p) ...\n", kernel
);
213 bootstage_mark(BOOTSTAGE_ID_RUN_OS
);
216 linux_extra
= gd
->ram_size
;
218 /* we assume that the kernel is in place */
219 printf("\nStarting kernel ...\n\n");
221 kernel(linux_argc
, (ulong
)linux_argv
, (ulong
)linux_env
, linux_extra
);
224 int do_bootm_linux(int flag
, int argc
, char * const argv
[],
225 bootm_headers_t
*images
)
227 /* No need for those on MIPS */
228 if (flag
& BOOTM_STATE_OS_BD_T
)
231 if (flag
& BOOTM_STATE_OS_CMDLINE
) {
232 boot_cmdline_linux(images
);
236 if (flag
& BOOTM_STATE_OS_PREP
) {
237 boot_prep_linux(images
);
241 if (flag
& BOOTM_STATE_OS_GO
) {
242 boot_jump_linux(images
);
246 boot_cmdline_linux(images
);
247 boot_prep_linux(images
);
248 boot_jump_linux(images
);
250 /* does not return */