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; 37*06c5d30dSThomas Chou char *of_flat_tree = NULL; 38*06c5d30dSThomas Chou #if defined(CONFIG_OF_LIBFDT) 39*06c5d30dSThomas Chou ulong of_size = 0; 40*06c5d30dSThomas Chou 41*06c5d30dSThomas Chou /* find flattened device tree */ 42*06c5d30dSThomas Chou if (boot_get_fdt(flag, argc, argv, images, &of_flat_tree, &of_size)) 43*06c5d30dSThomas Chou return 1; 44*06c5d30dSThomas Chou #endif 45*06c5d30dSThomas Chou if (!of_flat_tree) 46*06c5d30dSThomas Chou of_flat_tree = (char *)simple_strtoul(argv[3], NULL, 16); 47*06c5d30dSThomas Chou if (of_flat_tree) 48*06c5d30dSThomas Chou initrd_end = (ulong)of_flat_tree; 49ea0364f1SPeter Tyser 50ea0364f1SPeter Tyser if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) 51ea0364f1SPeter Tyser return 1; 52ea0364f1SPeter Tyser 53ea0364f1SPeter Tyser /* flushes data and instruction caches before calling the kernel */ 54ea0364f1SPeter Tyser disable_interrupts(); 55ea0364f1SPeter Tyser flush_dcache((ulong)kernel, CONFIG_SYS_DCACHE_SIZE); 56ea0364f1SPeter Tyser flush_icache((ulong)kernel, CONFIG_SYS_ICACHE_SIZE); 57ea0364f1SPeter Tyser 58ea0364f1SPeter Tyser debug("bootargs=%s @ 0x%lx\n", commandline, (ulong)&commandline); 59ea0364f1SPeter Tyser debug("initrd=0x%lx-0x%lx\n", (ulong)initrd_start, (ulong)initrd_end); 60*06c5d30dSThomas Chou /* kernel parameters passing 61*06c5d30dSThomas Chou * r4 : NIOS magic 62*06c5d30dSThomas Chou * r5 : initrd start 63*06c5d30dSThomas Chou * r6 : initrd end or fdt 64*06c5d30dSThomas Chou * r7 : kernel command line 65*06c5d30dSThomas Chou * fdt is passed to kernel via r6, the same as initrd_end. fdt will be 66*06c5d30dSThomas Chou * verified with fdt magic. when both initrd and fdt are used at the 67*06c5d30dSThomas Chou * same time, fdt must follow immediately after initrd. 68*06c5d30dSThomas Chou */ 69ea0364f1SPeter Tyser kernel(NIOS_MAGIC, initrd_start, initrd_end, commandline); 70ea0364f1SPeter Tyser /* does not return */ 71ea0364f1SPeter Tyser 72ea0364f1SPeter Tyser return 1; 73ea0364f1SPeter Tyser } 74