upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
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130 lines
3.5 KiB
130 lines
3.5 KiB
/*
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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 <image.h>
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#include <zlib.h>
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#include <bzlib.h>
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#include <watchdog.h>
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#include <environment.h>
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#include <asm/byteorder.h>
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#ifdef CONFIG_SHOW_BOOT_PROGRESS
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# include <status_led.h>
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#endif
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DECLARE_GLOBAL_DATA_PTR;
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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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static ulong get_sp (void);
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static void set_clocks_in_mhz (bd_t *kbd);
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void do_bootm_linux(cmd_tbl_t * cmdtp, int flag,
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int argc, char *argv[],
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image_header_t *hdr, int verify)
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{
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ulong sp, sp_limit, alloc_current;
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ulong rd_data_start, rd_data_end, rd_len;
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ulong initrd_start, initrd_end;
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ulong cmd_start, cmd_end;
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bd_t *kbd;
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void (*kernel) (bd_t *, ulong, ulong, ulong, ulong);
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/*
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* Booting a (Linux) kernel image
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*
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* Allocate space for command line and board info - the
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* address should be as high as possible within the reach of
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* the kernel (see CFG_BOOTMAPSZ settings), but in unused
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* memory, which means far enough below the current stack
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* pointer.
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*/
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sp = get_sp();
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debug ("## Current stack ends at 0x%08lx ", sp);
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alloc_current = sp_limit = get_boot_sp_limit(sp);
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debug ("=> set upper limit to 0x%08lx\n", sp_limit);
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/* allocate space and init command line */
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alloc_current = get_boot_cmdline (alloc_current, &cmd_start, &cmd_end);
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/* allocate space for kernel copy of board info */
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alloc_current = get_boot_kbd (alloc_current, &kbd);
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set_clocks_in_mhz(kbd);
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/* find kernel */
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kernel =
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(void (*)(bd_t *, ulong, ulong, ulong, ulong))image_get_ep (hdr);
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/* find ramdisk */
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get_ramdisk (cmdtp, flag, argc, argv, hdr, verify,
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IH_ARCH_M68K, &rd_data_start, &rd_data_end);
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rd_len = rd_data_end - rd_data_start;
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alloc_current = ramdisk_high (alloc_current, rd_data_start, rd_len,
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kbd, sp_limit, get_sp (),
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&initrd_start, &initrd_end);
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debug("## Transferring control to Linux (at address %08lx) ...\n",
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(ulong) kernel);
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show_boot_progress (15);
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/*
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* Linux Kernel Parameters (passing board info data):
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* r3: ptr to board info data
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* r4: initrd_start or 0 if no initrd
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* r5: initrd_end - unused if r4 is 0
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* r6: Start of command line string
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* r7: End of command line string
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*/
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(*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
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/* does not return */
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}
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static ulong get_sp (void)
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{
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ulong sp;
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asm("movel %%a7, %%d0\n"
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"movel %%d0, %0\n": "=d"(sp): :"%d0");
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return sp;
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}
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static void set_clocks_in_mhz (bd_t *kbd)
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{
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char *s;
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if ((s = getenv("clocks_in_mhz")) != NULL) {
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/* convert all clock information to MHz */
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kbd->bi_intfreq /= 1000000L;
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kbd->bi_busfreq /= 1000000L;
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}
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}
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