diff options
Diffstat (limited to 'lib_mips/bootm.c')
| -rw-r--r-- | lib_mips/bootm.c | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/lib_mips/bootm.c b/lib_mips/bootm.c new file mode 100644 index 0000000..7ea7571 --- /dev/null +++ b/lib_mips/bootm.c @@ -0,0 +1,249 @@ +/* + * (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 <zlib.h> +#include <asm/byteorder.h> +#include <asm/addrspace.h> + +DECLARE_GLOBAL_DATA_PTR; + +#define LINUX_MAX_ENVS 256 +#define LINUX_MAX_ARGS 256 + +extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); + +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); + + +void do_bootm_linux (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[], + image_header_t *hdr, int verify) +{ + ulong rd_data, rd_len; + ulong initrd_start, initrd_end; + image_header_t *rd_hdr; + + void (*theKernel) (int, char **, char **, int *); + char *commandline = getenv ("bootargs"); + char env_buf[12]; + + theKernel = + (void (*)(int, char **, char **, int *))image_get_ep (hdr); + + /* + * Check if there is an initrd image + */ + if (argc >= 3) { + show_boot_progress (9); + + rd_hdr = (image_header_t *)simple_strtoul (argv[2], NULL, 16); + printf ("## Loading Ramdisk Image at %08lx ...\n", rd_hdr); + + if (!image_check_magic (rd_hdr)) { + printf ("Bad Magic Number\n"); + show_boot_progress (-10); + do_reset (cmdtp, flag, argc, argv); + } + + if (!image_check_hcrc (rd_hdr)) { + printf ("Bad Header Checksum\n"); + show_boot_progress (-11); + do_reset (cmdtp, flag, argc, argv); + } + + show_boot_progress (10); + print_image_hdr (rd_hdr); + + rd_data = image_get_data (rd_hdr); + rd_len = image_get_data_size (rd_hdr); + + if (verify) { + printf (" Verifying Checksum ... "); + if (!image_check_dcrc (rd_hdr)) { + printf ("Bad Data CRC\n"); + show_boot_progress (-12); + do_reset (cmdtp, flag, argc, argv); + } + printf ("OK\n"); + } + + show_boot_progress (11); + + if (!image_check_os (rd_hdr, IH_OS_LINUX) || + !image_check_arch (rd_hdr, IH_ARCH_MIPS) || + !image_check_type (rd_hdr, IH_TYPE_RAMDISK)) { + printf ("No Linux MIPS Ramdisk Image\n"); + show_boot_progress (-13); + do_reset (cmdtp, flag, argc, argv); + } + + /* + * Now check if we have a multifile image + */ + } else if (image_check_type (hdr, IH_TYPE_MULTI)) { + /* + * Get second entry data start address and len + */ + show_boot_progress (13); + image_multi_getimg (hdr, 1, &rd_data, &rd_len); + } else { + /* + * no initrd image + */ + show_boot_progress (14); + + rd_data = rd_len = 0; + } + +#ifdef DEBUG + if (!rd_data) { + printf ("No initrd\n"); + } +#endif + + if (rd_data) { + initrd_start = rd_data; + initrd_end = initrd_start + rd_len; + } else { + initrd_start = 0; + initrd_end = 0; + } + + 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", gd->ram_size); +#ifdef DEBUG + printf ("## Giving linux memsize in bytes, %lu\n", gd->ram_size); +#endif +#else + sprintf (env_buf, "%lu", gd->ram_size >> 20); +#ifdef DEBUG + printf ("## Giving linux memsize in MB, %lu\n", gd->ram_size >> 20); +#endif +#endif /* CONFIG_MEMSIZE_IN_BYTES */ + + linux_env_set ("memsize", env_buf); + + sprintf (env_buf, "0x%08X", (uint) UNCACHED_SDRAM (initrd_start)); + linux_env_set ("initrd_start", env_buf); + + sprintf (env_buf, "0x%X", (uint) (initrd_end - initrd_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); + + /* we assume that the kernel is in place */ + printf ("\nStarting kernel ...\n\n"); + + theKernel (linux_argc, linux_argv, linux_env, 0); +} + +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; + } +} |