/* * (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> DECLARE_GLOBAL_DATA_PTR; #define PHYSADDR(x) x #define LINUX_MAX_ENVS 256 #define LINUX_MAX_ARGS 256 extern image_header_t header; /* from cmd_bootm.c */ 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[], ulong addr, ulong * len_ptr, int verify) { ulong len = 0, checksum; ulong initrd_start, initrd_end; ulong data; void (*theKernel) (int, char **, char **, int *); image_header_t *hdr = &header; char *commandline = getenv ("bootargs"); char env_buf[12]; theKernel = (void (*)(int, char **, char **, int *)) ntohl (hdr->ih_ep); /* * Check if there is an initrd image */ if (argc >= 3) { show_boot_progress (9); addr = simple_strtoul (argv[2], NULL, 16); printf ("## Loading Ramdisk Image at %08lx ...\n", addr); /* Copy header so we can blank CRC field for re-calculation */ memcpy (&header, (char *) addr, sizeof (image_header_t)); if (ntohl (hdr->ih_magic) != IH_MAGIC) { printf ("Bad Magic Number\n"); show_boot_progress (-10); do_reset (cmdtp, flag, argc, argv); } data = (ulong) & header; len = sizeof (image_header_t); checksum = ntohl (hdr->ih_hcrc); hdr->ih_hcrc = 0; if (crc32 (0, (char *) data, len) != checksum) { printf ("Bad Header Checksum\n"); show_boot_progress (-11); do_reset (cmdtp, flag, argc, argv); } show_boot_progress (10); print_image_hdr (hdr); data = addr + sizeof (image_header_t); len = ntohl (hdr->ih_size); if (verify) { ulong csum = 0; printf (" Verifying Checksum ... "); csum = crc32 (0, (char *) data, len); if (csum != ntohl (hdr->ih_dcrc)) { printf ("Bad Data CRC\n"); show_boot_progress (-12); do_reset (cmdtp, flag, argc, argv); } printf ("OK\n"); } show_boot_progress (11); if ((hdr->ih_os != IH_OS_LINUX) || (hdr->ih_arch != IH_CPU_M68K) || (hdr->ih_type != IH_TYPE_RAMDISK)) { printf ("No Linux M68K Ramdisk Image\n"); show_boot_progress (-13); do_reset (cmdtp, flag, argc, argv); } /* * Now check if we have a multifile image */ } else if ((hdr->ih_type == IH_TYPE_MULTI) && (len_ptr[1])) { ulong tail = ntohl (len_ptr[0]) % 4; int i; show_boot_progress (13); /* skip kernel length and terminator */ data = (ulong) (&len_ptr[2]); /* skip any additional image length fields */ for (i = 1; len_ptr[i]; ++i) data += 4; /* add kernel length, and align */ data += ntohl (len_ptr[0]); if (tail) { data += 4 - tail; } len = ntohl (len_ptr[1]); } else { /* * no initrd image */ show_boot_progress (14); data = 0; } #ifdef DEBUG if (!data) { printf ("No initrd\n"); } #endif if (data) { initrd_start = data; initrd_end = initrd_start + 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 (PHYSADDR (gd->bd->bi_boot_params), commandline); sprintf (env_buf, "%lu", gd->ram_size >> 20); linux_env_set ("memsize", env_buf); sprintf (env_buf, "0x%08X", (uint) PHYSADDR (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; } }