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https://xff.cz/git/u-boot/
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* Patch by Bernhard Kuhn, 28 Nov 2003:
add support for Coldfire CPU add support for Motorola M5272C3 and M5282EVB boards
This commit is contained in:
wdenk
274
lib_m68k/m68k_linux.c
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274
lib_m68k/m68k_linux.c
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/*
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* (C) Copyright 2003
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <common.h>
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#include <command.h>
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#include <cmd_boot.h>
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#include <image.h>
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#include <zlib.h>
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#include <asm/byteorder.h>
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#define PHYSADDR(x) x
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#define LINUX_MAX_ENVS 256
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#define LINUX_MAX_ARGS 256
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#ifdef CONFIG_SHOW_BOOT_PROGRESS
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# include <status_led.h>
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# define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg)
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#else
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# define SHOW_BOOT_PROGRESS(arg)
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#endif
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extern image_header_t header; /* from cmd_bootm.c */
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static int linux_argc;
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static char **linux_argv;
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static char **linux_env;
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static char *linux_env_p;
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static int linux_env_idx;
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static void linux_params_init (ulong start, char *commandline);
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static void linux_env_set (char *env_name, char *env_val);
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void do_bootm_linux (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[],
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ulong addr, ulong * len_ptr, int verify)
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{
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DECLARE_GLOBAL_DATA_PTR;
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ulong len = 0, checksum;
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ulong initrd_start, initrd_end;
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ulong data;
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void (*theKernel) (int, char **, char **, int *);
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image_header_t *hdr = &header;
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char *commandline = getenv ("bootargs");
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char env_buf[12];
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theKernel =
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(void (*)(int, char **, char **, int *)) ntohl (hdr->ih_ep);
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/*
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* Check if there is an initrd image
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*/
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if (argc >= 3) {
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SHOW_BOOT_PROGRESS (9);
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addr = simple_strtoul (argv[2], NULL, 16);
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printf ("## Loading Ramdisk Image at %08lx ...\n", addr);
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/* Copy header so we can blank CRC field for re-calculation */
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memcpy (&header, (char *) addr, sizeof (image_header_t));
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if (ntohl (hdr->ih_magic) != IH_MAGIC) {
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printf ("Bad Magic Number\n");
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SHOW_BOOT_PROGRESS (-10);
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do_reset (cmdtp, flag, argc, argv);
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}
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data = (ulong) & header;
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len = sizeof (image_header_t);
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checksum = ntohl (hdr->ih_hcrc);
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hdr->ih_hcrc = 0;
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if (crc32 (0, (char *) data, len) != checksum) {
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printf ("Bad Header Checksum\n");
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SHOW_BOOT_PROGRESS (-11);
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do_reset (cmdtp, flag, argc, argv);
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}
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SHOW_BOOT_PROGRESS (10);
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print_image_hdr (hdr);
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data = addr + sizeof (image_header_t);
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len = ntohl (hdr->ih_size);
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if (verify) {
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ulong csum = 0;
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printf (" Verifying Checksum ... ");
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csum = crc32 (0, (char *) data, len);
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if (csum != ntohl (hdr->ih_dcrc)) {
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printf ("Bad Data CRC\n");
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SHOW_BOOT_PROGRESS (-12);
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do_reset (cmdtp, flag, argc, argv);
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}
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printf ("OK\n");
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}
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SHOW_BOOT_PROGRESS (11);
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if ((hdr->ih_os != IH_OS_LINUX) ||
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(hdr->ih_arch != IH_CPU_MIPS) ||
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(hdr->ih_type != IH_TYPE_RAMDISK)) {
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printf ("No Linux MIPS Ramdisk Image\n");
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SHOW_BOOT_PROGRESS (-13);
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do_reset (cmdtp, flag, argc, argv);
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}
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/*
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* Now check if we have a multifile image
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*/
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} else if ((hdr->ih_type == IH_TYPE_MULTI) && (len_ptr[1])) {
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ulong tail = ntohl (len_ptr[0]) % 4;
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int i;
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SHOW_BOOT_PROGRESS (13);
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/* skip kernel length and terminator */
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data = (ulong) (&len_ptr[2]);
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/* skip any additional image length fields */
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for (i = 1; len_ptr[i]; ++i)
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data += 4;
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/* add kernel length, and align */
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data += ntohl (len_ptr[0]);
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if (tail) {
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data += 4 - tail;
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}
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len = ntohl (len_ptr[1]);
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} else {
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/*
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* no initrd image
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*/
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SHOW_BOOT_PROGRESS (14);
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data = 0;
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}
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#ifdef DEBUG
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if (!data) {
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printf ("No initrd\n");
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}
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#endif
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if (data) {
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initrd_start = data;
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initrd_end = initrd_start + len;
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} else {
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initrd_start = 0;
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initrd_end = 0;
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}
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SHOW_BOOT_PROGRESS (15);
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#ifdef DEBUG
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printf ("## Transferring control to Linux (at address %08lx) ...\n",
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(ulong) theKernel);
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#endif
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linux_params_init (PHYSADDR (gd->bd->bi_boot_params), commandline);
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sprintf (env_buf, "%lu", gd->ram_size >> 20);
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linux_env_set ("memsize", env_buf);
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sprintf (env_buf, "0x%08X", (uint) PHYSADDR (initrd_start));
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linux_env_set ("initrd_start", env_buf);
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sprintf (env_buf, "0x%X", (uint) (initrd_end - initrd_start));
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linux_env_set ("initrd_size", env_buf);
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sprintf (env_buf, "0x%08X", (uint) (gd->bd->bi_flashstart));
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linux_env_set ("flash_start", env_buf);
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sprintf (env_buf, "0x%X", (uint) (gd->bd->bi_flashsize));
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linux_env_set ("flash_size", env_buf);
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/* we assume that the kernel is in place */
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printf ("\nStarting kernel ...\n\n");
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theKernel (linux_argc, linux_argv, linux_env, 0);
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}
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static void linux_params_init (ulong start, char *line)
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{
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char *next, *quote, *argp;
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linux_argc = 1;
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linux_argv = (char **) start;
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linux_argv[0] = 0;
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argp = (char *) (linux_argv + LINUX_MAX_ARGS);
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next = line;
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while (line && *line && linux_argc < LINUX_MAX_ARGS) {
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quote = strchr (line, '"');
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next = strchr (line, ' ');
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while (next != NULL && quote != NULL && quote < next) {
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/* we found a left quote before the next blank
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* now we have to find the matching right quote
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*/
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next = strchr (quote + 1, '"');
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if (next != NULL) {
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quote = strchr (next + 1, '"');
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next = strchr (next + 1, ' ');
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}
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}
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if (next == NULL) {
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next = line + strlen (line);
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}
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linux_argv[linux_argc] = argp;
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memcpy (argp, line, next - line);
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argp[next - line] = 0;
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argp += next - line + 1;
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linux_argc++;
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if (*next)
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next++;
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line = next;
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}
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linux_env = (char **) (((ulong) argp + 15) & ~15);
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linux_env[0] = 0;
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linux_env_p = (char *) (linux_env + LINUX_MAX_ENVS);
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linux_env_idx = 0;
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}
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static void linux_env_set (char *env_name, char *env_val)
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{
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if (linux_env_idx < LINUX_MAX_ENVS - 1) {
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linux_env[linux_env_idx] = linux_env_p;
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strcpy (linux_env_p, env_name);
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linux_env_p += strlen (env_name);
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strcpy (linux_env_p, "=");
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linux_env_p += 1;
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strcpy (linux_env_p, env_val);
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linux_env_p += strlen (env_val);
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linux_env_p++;
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linux_env[++linux_env_idx] = 0;
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}
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}
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