diff options
Diffstat (limited to 'arch/mips/lib/bootm.c')
| -rw-r--r-- | arch/mips/lib/bootm.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/arch/mips/lib/bootm.c b/arch/mips/lib/bootm.c new file mode 100644 index 0000000..54af24c --- /dev/null +++ b/arch/mips/lib/bootm.c @@ -0,0 +1,174 @@ +/* + * (C) Copyright 2003 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <common.h> +#include <command.h> +#include <image.h> +#include <u-boot/zlib.h> +#include <asm/byteorder.h> +#include <asm/addrspace.h> + +DECLARE_GLOBAL_DATA_PTR; + +#define LINUX_MAX_ENVS 256 +#define LINUX_MAX_ARGS 256 + +static int linux_argc; +static char ** linux_argv; + +static char ** linux_env; +static char * linux_env_p; +static int linux_env_idx; + +static void linux_params_init (ulong start, char * commandline); +static void linux_env_set (char * env_name, char * env_val); + +int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images) +{ + void (*theKernel) (int, char **, char **, int *); + char *commandline = getenv ("bootargs"); + char env_buf[12]; + char *cp; + + if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) + return 1; + + /* find kernel entry point */ + theKernel = (void (*)(int, char **, char **, int *))images->ep; + + show_boot_progress (15); + +#ifdef DEBUG + printf ("## Transferring control to Linux (at address %08lx) ...\n", + (ulong) theKernel); +#endif + + linux_params_init (UNCACHED_SDRAM (gd->bd->bi_boot_params), commandline); + +#ifdef CONFIG_MEMSIZE_IN_BYTES + sprintf (env_buf, "%lu", (ulong)gd->ram_size); + debug ("## Giving linux memsize in bytes, %lu\n", (ulong)gd->ram_size); +#else + sprintf (env_buf, "%lu", (ulong)(gd->ram_size >> 20)); + debug ("## Giving linux memsize in MB, %lu\n", (ulong)(gd->ram_size >> 20)); +#endif /* CONFIG_MEMSIZE_IN_BYTES */ + + linux_env_set ("memsize", env_buf); + + sprintf (env_buf, "0x%08X", (uint) UNCACHED_SDRAM (images->rd_start)); + linux_env_set ("initrd_start", env_buf); + + sprintf (env_buf, "0x%X", (uint) (images->rd_end - images->rd_start)); + linux_env_set ("initrd_size", env_buf); + + sprintf (env_buf, "0x%08X", (uint) (gd->bd->bi_flashstart)); + linux_env_set ("flash_start", env_buf); + + sprintf (env_buf, "0x%X", (uint) (gd->bd->bi_flashsize)); + linux_env_set ("flash_size", env_buf); + + cp = getenv("ethaddr"); + if (cp != NULL) { + linux_env_set("ethaddr", cp); + } + + cp = getenv("eth1addr"); + if (cp != NULL) { + linux_env_set("eth1addr", cp); + } + + /* we assume that the kernel is in place */ + printf ("\nStarting kernel ...\n\n"); + + theKernel (linux_argc, linux_argv, linux_env, 0); + /* does not return */ + return 1; +} + +static void linux_params_init (ulong start, char *line) +{ + char *next, *quote, *argp; + + linux_argc = 1; + linux_argv = (char **) start; + linux_argv[0] = 0; + argp = (char *) (linux_argv + LINUX_MAX_ARGS); + + next = line; + + while (line && *line && linux_argc < LINUX_MAX_ARGS) { + quote = strchr (line, '"'); + next = strchr (line, ' '); + + while (next != NULL && quote != NULL && quote < next) { + /* we found a left quote before the next blank + * now we have to find the matching right quote + */ + next = strchr (quote + 1, '"'); + if (next != NULL) { + quote = strchr (next + 1, '"'); + next = strchr (next + 1, ' '); + } + } + + if (next == NULL) { + next = line + strlen (line); + } + + linux_argv[linux_argc] = argp; + memcpy (argp, line, next - line); + argp[next - line] = 0; + + argp += next - line + 1; + linux_argc++; + + if (*next) + next++; + + line = next; + } + + linux_env = (char **) (((ulong) argp + 15) & ~15); + linux_env[0] = 0; + linux_env_p = (char *) (linux_env + LINUX_MAX_ENVS); + linux_env_idx = 0; +} + +static void linux_env_set (char *env_name, char *env_val) +{ + if (linux_env_idx < LINUX_MAX_ENVS - 1) { + linux_env[linux_env_idx] = linux_env_p; + + strcpy (linux_env_p, env_name); + linux_env_p += strlen (env_name); + + strcpy (linux_env_p, "="); + linux_env_p += 1; + + strcpy (linux_env_p, env_val); + linux_env_p += strlen (env_val); + + linux_env_p++; + linux_env[++linux_env_idx] = 0; + } +} |