3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 #include <u-boot/zlib.h>
28 #include <asm/byteorder.h>
29 #include <asm/addrspace.h>
31 DECLARE_GLOBAL_DATA_PTR;
33 #define LINUX_MAX_ENVS 256
34 #define LINUX_MAX_ARGS 256
36 static int linux_argc;
37 static char **linux_argv;
39 static char **linux_env;
40 static char *linux_env_p;
41 static int linux_env_idx;
43 static void linux_params_init(ulong start, char *commandline);
44 static void linux_env_set(char *env_name, char *env_val);
46 static void boot_prep_linux(bootm_headers_t *images)
48 char *commandline = getenv("bootargs");
52 linux_params_init(UNCACHED_SDRAM(gd->bd->bi_boot_params), commandline);
54 #ifdef CONFIG_MEMSIZE_IN_BYTES
55 sprintf(env_buf, "%lu", (ulong)gd->ram_size);
56 debug("## Giving linux memsize in bytes, %lu\n", (ulong)gd->ram_size);
58 sprintf(env_buf, "%lu", (ulong)(gd->ram_size >> 20));
59 debug("## Giving linux memsize in MB, %lu\n",
60 (ulong)(gd->ram_size >> 20));
61 #endif /* CONFIG_MEMSIZE_IN_BYTES */
63 linux_env_set("memsize", env_buf);
65 sprintf(env_buf, "0x%08X", (uint) UNCACHED_SDRAM(images->rd_start));
66 linux_env_set("initrd_start", env_buf);
68 sprintf(env_buf, "0x%X", (uint) (images->rd_end - images->rd_start));
69 linux_env_set("initrd_size", env_buf);
71 sprintf(env_buf, "0x%08X", (uint) (gd->bd->bi_flashstart));
72 linux_env_set("flash_start", env_buf);
74 sprintf(env_buf, "0x%X", (uint) (gd->bd->bi_flashsize));
75 linux_env_set("flash_size", env_buf);
77 cp = getenv("ethaddr");
79 linux_env_set("ethaddr", cp);
81 cp = getenv("eth1addr");
83 linux_env_set("eth1addr", cp);
86 static void boot_jump_linux(bootm_headers_t *images)
88 void (*theKernel) (int, char **, char **, int *);
90 /* find kernel entry point */
91 theKernel = (void (*)(int, char **, char **, int *))images->ep;
93 debug("## Transferring control to Linux (at address %08lx) ...\n",
96 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
98 /* we assume that the kernel is in place */
99 printf("\nStarting kernel ...\n\n");
101 theKernel(linux_argc, linux_argv, linux_env, 0);
104 int do_bootm_linux(int flag, int argc, char * const argv[],
105 bootm_headers_t *images)
107 /* No need for those on MIPS */
108 if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
111 if (flag & BOOTM_STATE_OS_PREP) {
112 boot_prep_linux(images);
116 if (flag & BOOTM_STATE_OS_GO) {
117 boot_jump_linux(images);
121 boot_prep_linux(images);
122 boot_jump_linux(images);
124 /* does not return */
128 static void linux_params_init(ulong start, char *line)
130 char *next, *quote, *argp;
133 linux_argv = (char **) start;
135 argp = (char *) (linux_argv + LINUX_MAX_ARGS);
139 while (line && *line && linux_argc < LINUX_MAX_ARGS) {
140 quote = strchr(line, '"');
141 next = strchr(line, ' ');
143 while (next && quote && quote < next) {
144 /* we found a left quote before the next blank
145 * now we have to find the matching right quote
147 next = strchr(quote + 1, '"');
149 quote = strchr(next + 1, '"');
150 next = strchr(next + 1, ' ');
155 next = line + strlen(line);
157 linux_argv[linux_argc] = argp;
158 memcpy(argp, line, next - line);
159 argp[next - line] = 0;
161 argp += next - line + 1;
170 linux_env = (char **) (((ulong) argp + 15) & ~15);
172 linux_env_p = (char *) (linux_env + LINUX_MAX_ENVS);
176 static void linux_env_set(char *env_name, char *env_val)
178 if (linux_env_idx < LINUX_MAX_ENVS - 1) {
179 linux_env[linux_env_idx] = linux_env_p;
181 strcpy(linux_env_p, env_name);
182 linux_env_p += strlen(env_name);
184 strcpy(linux_env_p, "=");
187 strcpy(linux_env_p, env_val);
188 linux_env_p += strlen(env_val);
191 linux_env[++linux_env_idx] = 0;