/* * (C) Copyright 2002 * Sysgo Real-Time Solutions, GmbH * Marius Groeger * * 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 #include #include #include #include #include #include #define tag_size(type) ((sizeof(struct tag_header) + sizeof(struct type)) >> 2) #define tag_next(t) ((struct tag *)((u32 *)(t) + (t)->hdr.size)) #if defined (CONFIG_SETUP_MEMORY_TAGS) || \ defined (CONFIG_CMDLINE_TAG) || \ defined (CONFIG_INITRD_TAG) || \ defined (CONFIG_VFD) static void setup_start_tag(bd_t *bd); # ifdef CONFIG_SETUP_MEMORY_TAGS static void setup_memory_tags(bd_t *bd); # endif static void setup_commandline_tag(bd_t *bd, char *commandline); #if 0 static void setup_ramdisk_tag(bd_t *bd); #endif # ifdef CONFIG_INITRD_TAG static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end); # endif static void setup_end_tag(bd_t *bd); # if defined (CONFIG_VFD) static void setup_videolfb_tag(gd_t *gd); # endif static struct tag *params; #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */ #ifdef CONFIG_SHOW_BOOT_PROGRESS # include # define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg) #else # define SHOW_BOOT_PROGRESS(arg) #endif extern image_header_t header; /* from cmd_bootm.c */ void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[], ulong addr, ulong *len_ptr, int verify) { DECLARE_GLOBAL_DATA_PTR; ulong len = 0, checksum; ulong initrd_start, initrd_end; ulong data; void (*theKernel)(int zero, int arch); image_header_t *hdr = &header; bd_t *bd = gd->bd; #ifdef CONFIG_CMDLINE_TAG char *commandline = getenv("bootargs"); #endif theKernel = (void (*)(int, 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_ARM) || (hdr->ih_type != IH_TYPE_RAMDISK) ) { printf ("No Linux ARM 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 #if defined (CONFIG_SETUP_MEMORY_TAGS) || \ defined (CONFIG_CMDLINE_TAG) || \ defined (CONFIG_INITRD_TAG) || \ defined (CONFIG_VFD) setup_start_tag(bd); #ifdef CONFIG_SETUP_MEMORY_TAGS setup_memory_tags(bd); #endif #ifdef CONFIG_CMDLINE_TAG setup_commandline_tag(bd, commandline); #endif #ifdef CONFIG_INITRD_TAG setup_initrd_tag(bd, initrd_start, initrd_end); #endif #if 0 setup_ramdisk_tag(bd); #endif #if defined (CONFIG_VFD) setup_videolfb_tag(gd); #endif setup_end_tag(bd); #endif /* we assume that the kernel is in place */ printf("\nStarting kernel ...\n\n"); cleanup_before_linux(); theKernel(0, bd->bi_arch_number); } #if defined (CONFIG_SETUP_MEMORY_TAGS) || \ defined (CONFIG_CMDLINE_TAG) || \ defined (CONFIG_INITRD_TAG) || \ defined (CONFIG_VFD) static void setup_start_tag(bd_t *bd) { params = (struct tag *)bd->bi_boot_params; params->hdr.tag = ATAG_CORE; params->hdr.size = tag_size(tag_core); params->u.core.flags = 0; params->u.core.pagesize = 0; params->u.core.rootdev = 0; params = tag_next(params); } #ifdef CONFIG_SETUP_MEMORY_TAGS static void setup_memory_tags(bd_t *bd) { int i; for(i = 0; i < CONFIG_NR_DRAM_BANKS; i++) { params->hdr.tag = ATAG_MEM; params->hdr.size = tag_size(tag_mem32); params->u.mem.start = bd->bi_dram[i].start; params->u.mem.size = bd->bi_dram[i].size; params = tag_next(params); } } #endif /* CONFIG_SETUP_MEMORY_TAGS */ static void setup_commandline_tag(bd_t *bd, char *commandline) { char *p; /* eat leading white space */ for(p = commandline; *p == ' '; p++) ; /* skip non-existent command lines so the kernel will still * use its default command line. */ if(*p == '\0') return; params->hdr.tag = ATAG_CMDLINE; params->hdr.size = (sizeof(struct tag_header) + strlen(p) + 1 + 4) >> 2; strcpy(params->u.cmdline.cmdline, p); params = tag_next(params); } #ifndef ATAG_INITRD2 #define ATAG_INITRD2 0x54420005 #endif #ifdef CONFIG_INITRD_TAG static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end) { /* an ATAG_INITRD node tells the kernel where the compressed * ramdisk can be found. ATAG_RDIMG is a better name, actually. */ params->hdr.tag = ATAG_INITRD2; params->hdr.size = tag_size(tag_initrd); params->u.initrd.start = initrd_start; params->u.initrd.size = initrd_end - initrd_start; params = tag_next(params); } #endif /* CONFIG_INITRD_TAG */ #if 0 static void setup_ramdisk_tag(bd_t *bd) { /* an ATAG_RAMDISK node tells the kernel how large the * decompressed ramdisk will become. */ params->hdr.tag = ATAG_RAMDISK; params->hdr.size = tag_size(tag_ramdisk); params->u.ramdisk.start = 0; /*params->u.ramdisk.size = RAMDISK_SIZE; */ params->u.ramdisk.flags = 1; /* automatically load ramdisk */ params = tag_next(params); } #endif /* 0 */ #if defined (CONFIG_VFD) static void setup_videolfb_tag(gd_t *gd) { /* An ATAG_VIDEOLFB node tells the kernel where and how large * the framebuffer for video was allocated (among other things). * Note that a _physical_ address is passed ! * * We only use it to pass the address and size, the other entries * in the tag_videolfb are not of interest. */ params->hdr.tag = ATAG_VIDEOLFB; params->hdr.size = tag_size(tag_videolfb); params->u.videolfb.lfb_base = (u32)gd->fb_base; /* 7168 = 256*4*56/8 - actually 2 pages (8192 bytes) are allocated */ params->u.videolfb.lfb_size = 7168; params = tag_next(params); } #endif static void setup_end_tag(bd_t *bd) { params->hdr.tag = ATAG_NONE; params->hdr.size = 0; } #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */