1ea0364f1SPeter Tyser /* 2ea0364f1SPeter Tyser * (C) Copyright 2003 3ea0364f1SPeter Tyser * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4ea0364f1SPeter Tyser * 5ea0364f1SPeter Tyser * See file CREDITS for list of people who contributed to this 6ea0364f1SPeter Tyser * project. 7ea0364f1SPeter Tyser * 8ea0364f1SPeter Tyser * This program is free software; you can redistribute it and/or modify 9ea0364f1SPeter Tyser * it under the terms of the GNU General Public License as published by 10ea0364f1SPeter Tyser * the Free Software Foundation; either version 2 of the License, or 11ea0364f1SPeter Tyser * (at your option) any later version. 12ea0364f1SPeter Tyser * 13ea0364f1SPeter Tyser * This program is distributed in the hope that it will be useful, 14ea0364f1SPeter Tyser * but WITHOUT ANY WARRANTY; without even the implied warranty of 15ea0364f1SPeter Tyser * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16ea0364f1SPeter Tyser * GNU General Public License for more details. 17ea0364f1SPeter Tyser * 18ea0364f1SPeter Tyser * You should have received a copy of the GNU General Public License 19ea0364f1SPeter Tyser * along with this program; if not, write to the Free Software 20ea0364f1SPeter Tyser * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21ea0364f1SPeter Tyser * 22ea0364f1SPeter Tyser */ 23ea0364f1SPeter Tyser 24ea0364f1SPeter Tyser #include <common.h> 25ea0364f1SPeter Tyser #include <command.h> 26ea0364f1SPeter Tyser #include <image.h> 27ea0364f1SPeter Tyser #include <u-boot/zlib.h> 28ea0364f1SPeter Tyser #include <bzlib.h> 29ea0364f1SPeter Tyser #include <watchdog.h> 30ea0364f1SPeter Tyser #include <environment.h> 31ea0364f1SPeter Tyser #include <asm/byteorder.h> 32ea0364f1SPeter Tyser #ifdef CONFIG_SHOW_BOOT_PROGRESS 33ea0364f1SPeter Tyser # include <status_led.h> 34ea0364f1SPeter Tyser #endif 35ea0364f1SPeter Tyser 36ea0364f1SPeter Tyser DECLARE_GLOBAL_DATA_PTR; 37ea0364f1SPeter Tyser 38ea0364f1SPeter Tyser #define PHYSADDR(x) x 39ea0364f1SPeter Tyser 40ea0364f1SPeter Tyser #define LINUX_MAX_ENVS 256 41ea0364f1SPeter Tyser #define LINUX_MAX_ARGS 256 42ea0364f1SPeter Tyser 43ea0364f1SPeter Tyser static ulong get_sp (void); 44ea0364f1SPeter Tyser static void set_clocks_in_mhz (bd_t *kbd); 45ea0364f1SPeter Tyser 46ea0364f1SPeter Tyser void arch_lmb_reserve(struct lmb *lmb) 47ea0364f1SPeter Tyser { 48ea0364f1SPeter Tyser ulong sp; 49ea0364f1SPeter Tyser 50ea0364f1SPeter Tyser /* 51ea0364f1SPeter Tyser * Booting a (Linux) kernel image 52ea0364f1SPeter Tyser * 53ea0364f1SPeter Tyser * Allocate space for command line and board info - the 54ea0364f1SPeter Tyser * address should be as high as possible within the reach of 55ea0364f1SPeter Tyser * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused 56ea0364f1SPeter Tyser * memory, which means far enough below the current stack 57ea0364f1SPeter Tyser * pointer. 58ea0364f1SPeter Tyser */ 59ea0364f1SPeter Tyser sp = get_sp(); 60ea0364f1SPeter Tyser debug ("## Current stack ends at 0x%08lx ", sp); 61ea0364f1SPeter Tyser 62ea0364f1SPeter Tyser /* adjust sp by 1K to be safe */ 63ea0364f1SPeter Tyser sp -= 1024; 64ea0364f1SPeter Tyser lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + gd->ram_size - sp)); 65ea0364f1SPeter Tyser } 66ea0364f1SPeter Tyser 6754841ab5SWolfgang Denk int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images) 68ea0364f1SPeter Tyser { 69ea0364f1SPeter Tyser ulong rd_len; 70ea0364f1SPeter Tyser ulong initrd_start, initrd_end; 71ea0364f1SPeter Tyser int ret; 72ea0364f1SPeter Tyser 73ea0364f1SPeter Tyser ulong cmd_start, cmd_end; 74ea0364f1SPeter Tyser bd_t *kbd; 75ea0364f1SPeter Tyser void (*kernel) (bd_t *, ulong, ulong, ulong, ulong); 76ea0364f1SPeter Tyser struct lmb *lmb = &images->lmb; 77ea0364f1SPeter Tyser 78*2cb0e55aSAndreas Bießmann /* 79*2cb0e55aSAndreas Bießmann * allow the PREP bootm subcommand, it is required for bootm to work 80*2cb0e55aSAndreas Bießmann */ 81*2cb0e55aSAndreas Bießmann if (flag & BOOTM_STATE_OS_PREP) 82*2cb0e55aSAndreas Bießmann return 0; 83*2cb0e55aSAndreas Bießmann 84ea0364f1SPeter Tyser if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) 85ea0364f1SPeter Tyser return 1; 86ea0364f1SPeter Tyser 87ea0364f1SPeter Tyser /* allocate space for kernel copy of board info */ 88590d3cacSGrant Likely ret = boot_get_kbd (lmb, &kbd); 89ea0364f1SPeter Tyser if (ret) { 90ea0364f1SPeter Tyser puts("ERROR with allocation of kernel bd\n"); 91ea0364f1SPeter Tyser goto error; 92ea0364f1SPeter Tyser } 93ea0364f1SPeter Tyser set_clocks_in_mhz(kbd); 94ea0364f1SPeter Tyser 9524507cf5SSimon Glass ret = image_setup_linux(images); 96ea0364f1SPeter Tyser if (ret) 97ea0364f1SPeter Tyser goto error; 98ea0364f1SPeter Tyser 9924507cf5SSimon Glass kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))images->ep; 10024507cf5SSimon Glass 101ea0364f1SPeter Tyser debug("## Transferring control to Linux (at address %08lx) ...\n", 102ea0364f1SPeter Tyser (ulong) kernel); 103ea0364f1SPeter Tyser 104770605e4SSimon Glass bootstage_mark(BOOTSTAGE_ID_RUN_OS); 105ea0364f1SPeter Tyser 106ea0364f1SPeter Tyser /* 107ea0364f1SPeter Tyser * Linux Kernel Parameters (passing board info data): 108ea0364f1SPeter Tyser * sp+00: Ignore, side effect of using jsr to jump to kernel 109ea0364f1SPeter Tyser * sp+04: ptr to board info data 110ea0364f1SPeter Tyser * sp+08: initrd_start or 0 if no initrd 111ea0364f1SPeter Tyser * sp+12: initrd_end - unused if initrd_start is 0 112ea0364f1SPeter Tyser * sp+16: Start of command line string 113ea0364f1SPeter Tyser * sp+20: End of command line string 114ea0364f1SPeter Tyser */ 115ea0364f1SPeter Tyser (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end); 116ea0364f1SPeter Tyser /* does not return */ 117ea0364f1SPeter Tyser error: 118ea0364f1SPeter Tyser return 1; 119ea0364f1SPeter Tyser } 120ea0364f1SPeter Tyser 121ea0364f1SPeter Tyser static ulong get_sp (void) 122ea0364f1SPeter Tyser { 123ea0364f1SPeter Tyser ulong sp; 124ea0364f1SPeter Tyser 125ea0364f1SPeter Tyser asm("movel %%a7, %%d0\n" 126ea0364f1SPeter Tyser "movel %%d0, %0\n": "=d"(sp): :"%d0"); 127ea0364f1SPeter Tyser 128ea0364f1SPeter Tyser return sp; 129ea0364f1SPeter Tyser } 130ea0364f1SPeter Tyser 131ea0364f1SPeter Tyser static void set_clocks_in_mhz (bd_t *kbd) 132ea0364f1SPeter Tyser { 133ea0364f1SPeter Tyser char *s; 134ea0364f1SPeter Tyser 135ea0364f1SPeter Tyser if ((s = getenv("clocks_in_mhz")) != NULL) { 136ea0364f1SPeter Tyser /* convert all clock information to MHz */ 137ea0364f1SPeter Tyser kbd->bi_intfreq /= 1000000L; 138ea0364f1SPeter Tyser kbd->bi_busfreq /= 1000000L; 139ea0364f1SPeter Tyser } 140ea0364f1SPeter Tyser } 141