1ea0364f1SPeter Tyser /* 2ea0364f1SPeter Tyser * (C) Copyright 2003, Psyent Corporation <www.psyent.com> 3ea0364f1SPeter Tyser * Scott McNutt <smcnutt@psyent.com> 4ea0364f1SPeter Tyser * 51a459660SWolfgang Denk * SPDX-License-Identifier: GPL-2.0+ 6ea0364f1SPeter Tyser */ 7ea0364f1SPeter Tyser 8ea0364f1SPeter Tyser #include <common.h> 9ea0364f1SPeter Tyser 10ea0364f1SPeter Tyser #define NIOS_MAGIC 0x534f494e /* enable command line and initrd passing */ 11ea0364f1SPeter Tyser 1254841ab5SWolfgang Denk int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images) 13ea0364f1SPeter Tyser { 14ea0364f1SPeter Tyser void (*kernel)(int, int, int, char *) = (void *)images->ep; 15ea0364f1SPeter Tyser char *commandline = getenv("bootargs"); 16ea0364f1SPeter Tyser ulong initrd_start = images->rd_start; 17ea0364f1SPeter Tyser ulong initrd_end = images->rd_end; 1806c5d30dSThomas Chou char *of_flat_tree = NULL; 1906c5d30dSThomas Chou #if defined(CONFIG_OF_LIBFDT) 205a75e121SJohn Rigby /* did generic code already find a device tree? */ 215a75e121SJohn Rigby if (images->ft_len) 225a75e121SJohn Rigby of_flat_tree = images->ft_addr; 2306c5d30dSThomas Chou #endif 24983c72f4SSimon Glass if (!of_flat_tree && argc > 1) 25983c72f4SSimon Glass of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16); 2606c5d30dSThomas Chou if (of_flat_tree) 2706c5d30dSThomas Chou initrd_end = (ulong)of_flat_tree; 28ea0364f1SPeter Tyser 292cb0e55aSAndreas Bießmann /* 302cb0e55aSAndreas Bießmann * allow the PREP bootm subcommand, it is required for bootm to work 312cb0e55aSAndreas Bießmann */ 322cb0e55aSAndreas Bießmann if (flag & BOOTM_STATE_OS_PREP) 332cb0e55aSAndreas Bießmann return 0; 342cb0e55aSAndreas Bießmann 35ea0364f1SPeter Tyser if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) 36ea0364f1SPeter Tyser return 1; 37ea0364f1SPeter Tyser 38ea0364f1SPeter Tyser /* flushes data and instruction caches before calling the kernel */ 39ea0364f1SPeter Tyser disable_interrupts(); 40*21ff7344SThomas Chou flush_dcache_all(); 41ea0364f1SPeter Tyser 42ea0364f1SPeter Tyser debug("bootargs=%s @ 0x%lx\n", commandline, (ulong)&commandline); 43ea0364f1SPeter Tyser debug("initrd=0x%lx-0x%lx\n", (ulong)initrd_start, (ulong)initrd_end); 4406c5d30dSThomas Chou /* kernel parameters passing 4506c5d30dSThomas Chou * r4 : NIOS magic 4606c5d30dSThomas Chou * r5 : initrd start 4706c5d30dSThomas Chou * r6 : initrd end or fdt 4806c5d30dSThomas Chou * r7 : kernel command line 4906c5d30dSThomas Chou * fdt is passed to kernel via r6, the same as initrd_end. fdt will be 5006c5d30dSThomas Chou * verified with fdt magic. when both initrd and fdt are used at the 5106c5d30dSThomas Chou * same time, fdt must follow immediately after initrd. 5206c5d30dSThomas Chou */ 53ea0364f1SPeter Tyser kernel(NIOS_MAGIC, initrd_start, initrd_end, commandline); 54ea0364f1SPeter Tyser /* does not return */ 55ea0364f1SPeter Tyser 56ea0364f1SPeter Tyser return 1; 57ea0364f1SPeter Tyser } 58