/* * (C) Copyright 2003 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * See file CREDITS for list of people who contributed to this * project. * * 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 <common.h> #include <command.h> #include <image.h> #include <u-boot/zlib.h> #include <bzlib.h> #include <watchdog.h> #include <environment.h> #include <asm/byteorder.h> #ifdef CONFIG_SHOW_BOOT_PROGRESS # include <status_led.h> #endif DECLARE_GLOBAL_DATA_PTR; #define PHYSADDR(x) x #define LINUX_MAX_ENVS 256 #define LINUX_MAX_ARGS 256 static ulong get_sp (void); static void set_clocks_in_mhz (bd_t *kbd); void arch_lmb_reserve(struct lmb *lmb) { ulong sp; /* * Booting a (Linux) kernel image * * Allocate space for command line and board info - the * address should be as high as possible within the reach of * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused * memory, which means far enough below the current stack * pointer. */ sp = get_sp(); debug ("## Current stack ends at 0x%08lx ", sp); /* adjust sp by 1K to be safe */ sp -= 1024; lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + gd->ram_size - sp)); } int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images) { ulong rd_len; ulong initrd_start, initrd_end; int ret; ulong cmd_start, cmd_end; bd_t *kbd; void (*kernel) (bd_t *, ulong, ulong, ulong, ulong); struct lmb *lmb = &images->lmb; if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) return 1; /* allocate space and init command line */ ret = boot_get_cmdline (lmb, &cmd_start, &cmd_end); if (ret) { puts("ERROR with allocation of cmdline\n"); goto error; } /* allocate space for kernel copy of board info */ ret = boot_get_kbd (lmb, &kbd); if (ret) { puts("ERROR with allocation of kernel bd\n"); goto error; } set_clocks_in_mhz(kbd); kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))images->ep; rd_len = images->rd_end - images->rd_start; ret = boot_ramdisk_high (lmb, images->rd_start, rd_len, &initrd_start, &initrd_end); if (ret) goto error; debug("## Transferring control to Linux (at address %08lx) ...\n", (ulong) kernel); bootstage_mark(BOOTSTAGE_ID_RUN_OS); /* * Linux Kernel Parameters (passing board info data): * sp+00: Ignore, side effect of using jsr to jump to kernel * sp+04: ptr to board info data * sp+08: initrd_start or 0 if no initrd * sp+12: initrd_end - unused if initrd_start is 0 * sp+16: Start of command line string * sp+20: End of command line string */ (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end); /* does not return */ error: return 1; } static ulong get_sp (void) { ulong sp; asm("movel %%a7, %%d0\n" "movel %%d0, %0\n": "=d"(sp): :"%d0"); return sp; } static void set_clocks_in_mhz (bd_t *kbd) { char *s; if ((s = getenv("clocks_in_mhz")) != NULL) { /* convert all clock information to MHz */ kbd->bi_intfreq /= 1000000L; kbd->bi_busfreq /= 1000000L; } }