From c609719b8d1b2dca590e0ed499016d041203e403 Mon Sep 17 00:00:00 2001 From: wdenk Date: Sun, 3 Nov 2002 00:24:07 +0000 Subject: Initial revision --- lib_arm/armlinux.c | 324 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 324 insertions(+) create mode 100644 lib_arm/armlinux.c (limited to 'lib_arm/armlinux.c') diff --git a/lib_arm/armlinux.c b/lib_arm/armlinux.c new file mode 100644 index 0000000..e5b8faa --- /dev/null +++ b/lib_arm/armlinux.c @@ -0,0 +1,324 @@ +/* + * (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); +static void setup_memory_tags(bd_t *bd); +static void setup_commandline_tag(bd_t *bd, char *commandline); +#if 0 +static void setup_ramdisk_tag(bd_t *bd); +#endif +static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end); +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 */ + +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) { + 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_ARM) || + (hdr->ih_type != IH_TYPE_RAMDISK) ) { + printf ("No Linux ARM 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; + } else { + initrd_start = 0; + initrd_end = 0; + } + +#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); +} + + +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); + } +} + + +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 +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); +} + + +#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 */ -- cgit v1.1