/* * (C) Copyright 2002 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> * Marius Groeger <mgroeger@sysgo.de> * * Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) * * 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/zimage.h> /*cmd_boot.c*/ extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); extern image_header_t header; /* from cmd_bootm.c */ image_header_t *fake_header(image_header_t *hdr, void *ptr, int size) { /* try each supported image type in order */ if (NULL != fake_zimage_header(hdr, ptr, size)) { return hdr; } return NULL; } void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[], ulong addr, ulong *len_ptr, int verify) { void *base_ptr; ulong len = 0, checksum; ulong initrd_start, initrd_end; ulong data; image_header_t *hdr = &header; /* * Check if there is an initrd image */ if (argc >= 3) { 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"); 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"); do_reset (cmdtp, flag, argc, argv); } 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"); do_reset (cmdtp, flag, argc, argv); } printf ("OK\n"); } if ((hdr->ih_os != IH_OS_LINUX) || (hdr->ih_arch != IH_CPU_I386) || (hdr->ih_type != IH_TYPE_RAMDISK) ) { printf ("No Linux i386 Ramdisk Image\n"); 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; /* 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 */ data = 0; } #ifdef DEBUG if (!data) { printf ("No initrd\n"); } #endif if (data) { initrd_start = data; initrd_end = initrd_start + len; printf (" Loading Ramdisk to %08lx, end %08lx ... ", initrd_start, initrd_end); memmove ((void *)initrd_start, (void *)data, len); printf ("OK\n"); } else { initrd_start = 0; initrd_end = 0; } /* if multi-part image, we need to advance base ptr */ if ((hdr->ih_type==IH_TYPE_MULTI) && (len_ptr[1])) { int i; for (i=0, addr+=sizeof(int); len_ptr[i++]; addr+=sizeof(int)); } base_ptr = load_zimage((void*)addr + sizeof(image_header_t), ntohl(hdr->ih_size), initrd_start, initrd_end-initrd_start, 0); if (NULL == base_ptr) { printf ("## Kernel loading failed ...\n"); do_reset(cmdtp, flag, argc, argv); } #ifdef DEBUG printf ("## Transferring control to Linux (at address %08x) ...\n", (u32)base_ptr); #endif /* we assume that the kernel is in place */ printf("\nStarting kernel ...\n\n"); boot_zimage(base_ptr); }