1ea0364f1SPeter Tyser /* 2ea0364f1SPeter Tyser * (C) Copyright 2003, Psyent Corporation <www.psyent.com> 3ea0364f1SPeter Tyser * Scott McNutt <smcnutt@psyent.com> 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 9ea0364f1SPeter Tyser * modify it under the terms of the GNU General Public License as 10ea0364f1SPeter Tyser * published by the Free Software Foundation; either version 2 of 11ea0364f1SPeter Tyser * the License, or (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, 21ea0364f1SPeter Tyser * MA 02111-1307 USA 22ea0364f1SPeter Tyser */ 23ea0364f1SPeter Tyser 24ea0364f1SPeter Tyser #include <common.h> 25ea0364f1SPeter Tyser #include <command.h> 26ea0364f1SPeter Tyser #include <asm/byteorder.h> 27ea0364f1SPeter Tyser #include <asm/cache.h> 28ea0364f1SPeter Tyser 29ea0364f1SPeter Tyser #define NIOS_MAGIC 0x534f494e /* enable command line and initrd passing */ 30ea0364f1SPeter Tyser 3154841ab5SWolfgang Denk int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images) 32ea0364f1SPeter Tyser { 33ea0364f1SPeter Tyser void (*kernel)(int, int, int, char *) = (void *)images->ep; 34ea0364f1SPeter Tyser char *commandline = getenv("bootargs"); 35ea0364f1SPeter Tyser ulong initrd_start = images->rd_start; 36ea0364f1SPeter Tyser ulong initrd_end = images->rd_end; 3706c5d30dSThomas Chou char *of_flat_tree = NULL; 3806c5d30dSThomas Chou #if defined(CONFIG_OF_LIBFDT) 395a75e121SJohn Rigby /* did generic code already find a device tree? */ 405a75e121SJohn Rigby if (images->ft_len) 415a75e121SJohn Rigby of_flat_tree = images->ft_addr; 4206c5d30dSThomas Chou #endif 43983c72f4SSimon Glass if (!of_flat_tree && argc > 1) 44983c72f4SSimon Glass of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16); 4506c5d30dSThomas Chou if (of_flat_tree) 4606c5d30dSThomas Chou initrd_end = (ulong)of_flat_tree; 47ea0364f1SPeter Tyser 48*2cb0e55aSAndreas Bießmann /* 49*2cb0e55aSAndreas Bießmann * allow the PREP bootm subcommand, it is required for bootm to work 50*2cb0e55aSAndreas Bießmann */ 51*2cb0e55aSAndreas Bießmann if (flag & BOOTM_STATE_OS_PREP) 52*2cb0e55aSAndreas Bießmann return 0; 53*2cb0e55aSAndreas Bießmann 54ea0364f1SPeter Tyser if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) 55ea0364f1SPeter Tyser return 1; 56ea0364f1SPeter Tyser 57ea0364f1SPeter Tyser /* flushes data and instruction caches before calling the kernel */ 58ea0364f1SPeter Tyser disable_interrupts(); 59ea0364f1SPeter Tyser flush_dcache((ulong)kernel, CONFIG_SYS_DCACHE_SIZE); 60ea0364f1SPeter Tyser flush_icache((ulong)kernel, CONFIG_SYS_ICACHE_SIZE); 61ea0364f1SPeter Tyser 62ea0364f1SPeter Tyser debug("bootargs=%s @ 0x%lx\n", commandline, (ulong)&commandline); 63ea0364f1SPeter Tyser debug("initrd=0x%lx-0x%lx\n", (ulong)initrd_start, (ulong)initrd_end); 6406c5d30dSThomas Chou /* kernel parameters passing 6506c5d30dSThomas Chou * r4 : NIOS magic 6606c5d30dSThomas Chou * r5 : initrd start 6706c5d30dSThomas Chou * r6 : initrd end or fdt 6806c5d30dSThomas Chou * r7 : kernel command line 6906c5d30dSThomas Chou * fdt is passed to kernel via r6, the same as initrd_end. fdt will be 7006c5d30dSThomas Chou * verified with fdt magic. when both initrd and fdt are used at the 7106c5d30dSThomas Chou * same time, fdt must follow immediately after initrd. 7206c5d30dSThomas Chou */ 73ea0364f1SPeter Tyser kernel(NIOS_MAGIC, initrd_start, initrd_end, commandline); 74ea0364f1SPeter Tyser /* does not return */ 75ea0364f1SPeter Tyser 76ea0364f1SPeter Tyser return 1; 77ea0364f1SPeter Tyser } 78