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_jump_linux(bootm_headers_t *images)
48 void (*theKernel) (int, char **, char **, int *);
50 /* find kernel entry point */
51 theKernel = (void (*)(int, char **, char **, int *))images->ep;
53 debug("## Transferring control to Linux (at address %08lx) ...\n",
56 bootstage_mark(BOOTSTAGE_ID_RUN_OS);
58 /* we assume that the kernel is in place */
59 printf("\nStarting kernel ...\n\n");
61 theKernel(linux_argc, linux_argv, linux_env, 0);
64 int do_bootm_linux(int flag, int argc, char * const argv[],
65 bootm_headers_t *images)
67 char *commandline = getenv("bootargs");
71 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
74 linux_params_init(UNCACHED_SDRAM(gd->bd->bi_boot_params), commandline);
76 #ifdef CONFIG_MEMSIZE_IN_BYTES
77 sprintf(env_buf, "%lu", (ulong)gd->ram_size);
78 debug("## Giving linux memsize in bytes, %lu\n", (ulong)gd->ram_size);
80 sprintf(env_buf, "%lu", (ulong)(gd->ram_size >> 20));
81 debug("## Giving linux memsize in MB, %lu\n",
82 (ulong)(gd->ram_size >> 20));
83 #endif /* CONFIG_MEMSIZE_IN_BYTES */
85 linux_env_set("memsize", env_buf);
87 sprintf(env_buf, "0x%08X", (uint) UNCACHED_SDRAM(images->rd_start));
88 linux_env_set("initrd_start", env_buf);
90 sprintf(env_buf, "0x%X", (uint) (images->rd_end - images->rd_start));
91 linux_env_set("initrd_size", env_buf);
93 sprintf(env_buf, "0x%08X", (uint) (gd->bd->bi_flashstart));
94 linux_env_set("flash_start", env_buf);
96 sprintf(env_buf, "0x%X", (uint) (gd->bd->bi_flashsize));
97 linux_env_set("flash_size", env_buf);
99 cp = getenv("ethaddr");
101 linux_env_set("ethaddr", cp);
103 cp = getenv("eth1addr");
105 linux_env_set("eth1addr", cp);
107 boot_jump_linux(images);
109 /* does not return */
113 static void linux_params_init(ulong start, char *line)
115 char *next, *quote, *argp;
118 linux_argv = (char **) start;
120 argp = (char *) (linux_argv + LINUX_MAX_ARGS);
124 while (line && *line && linux_argc < LINUX_MAX_ARGS) {
125 quote = strchr(line, '"');
126 next = strchr(line, ' ');
128 while (next && quote && quote < next) {
129 /* we found a left quote before the next blank
130 * now we have to find the matching right quote
132 next = strchr(quote + 1, '"');
134 quote = strchr(next + 1, '"');
135 next = strchr(next + 1, ' ');
140 next = line + strlen(line);
142 linux_argv[linux_argc] = argp;
143 memcpy(argp, line, next - line);
144 argp[next - line] = 0;
146 argp += next - line + 1;
155 linux_env = (char **) (((ulong) argp + 15) & ~15);
157 linux_env_p = (char *) (linux_env + LINUX_MAX_ENVS);
161 static void linux_env_set(char *env_name, char *env_val)
163 if (linux_env_idx < LINUX_MAX_ENVS - 1) {
164 linux_env[linux_env_idx] = linux_env_p;
166 strcpy(linux_env_p, env_name);
167 linux_env_p += strlen(env_name);
169 strcpy(linux_env_p, "=");
172 strcpy(linux_env_p, env_val);
173 linux_env_p += strlen(env_val);
176 linux_env[++linux_env_idx] = 0;