mirror of
https://github.com/smaeul/u-boot.git
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49c3a861d1
Add the ability to break the steps of the bootm command into several subcommands: start, loados, ramdisk, fdt, bdt, cmdline, prep, go. This allows us to do things like manipulate device trees before they are passed to a booting kernel or setup memory for a secondary core in multicore situations. Not all OS types support all subcommands (currently only start, loados, ramdisk, fdt, and go are supported). Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
146 lines
3.6 KiB
C
146 lines
3.6 KiB
C
/*
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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 arch_lmb_reserve(struct lmb *lmb)
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{
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ulong sp;
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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 CONFIG_SYS_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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/* adjust sp by 1K to be safe */
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sp -= 1024;
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lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + gd->ram_size - sp));
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}
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int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
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{
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ulong rd_len;
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ulong initrd_start, initrd_end;
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int ret;
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ulong cmd_start, cmd_end;
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ulong bootmap_base;
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bd_t *kbd;
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void (*kernel) (bd_t *, ulong, ulong, ulong, ulong);
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struct lmb *lmb = &images->lmb;
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if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
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return 1;
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bootmap_base = getenv_bootm_low();
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/* allocate space and init command line */
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ret = boot_get_cmdline (lmb, &cmd_start, &cmd_end, bootmap_base);
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if (ret) {
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puts("ERROR with allocation of cmdline\n");
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goto error;
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}
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/* allocate space for kernel copy of board info */
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ret = boot_get_kbd (lmb, &kbd, bootmap_base);
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if (ret) {
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puts("ERROR with allocation of kernel bd\n");
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goto error;
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}
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set_clocks_in_mhz(kbd);
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kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))images->ep;
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rd_len = images->rd_end - images->rd_start;
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ret = boot_ramdisk_high (lmb, images->rd_start, rd_len,
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&initrd_start, &initrd_end);
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if (ret)
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goto error;
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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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error:
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return 1;
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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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