1ea0364f1SPeter Tyser /* 2ea0364f1SPeter Tyser * (C) Copyright 2003, Psyent Corporation <www.psyent.com> 3ea0364f1SPeter Tyser * Scott McNutt <smcnutt@psyent.com> 4ea0364f1SPeter Tyser * 5*1a459660SWolfgang Denk * SPDX-License-Identifier: GPL-2.0+ 6ea0364f1SPeter Tyser */ 7ea0364f1SPeter Tyser 8ea0364f1SPeter Tyser #include <common.h> 9ea0364f1SPeter Tyser #include <command.h> 10ea0364f1SPeter Tyser #include <asm/byteorder.h> 11ea0364f1SPeter Tyser #include <asm/cache.h> 12ea0364f1SPeter Tyser 13ea0364f1SPeter Tyser #define NIOS_MAGIC 0x534f494e /* enable command line and initrd passing */ 14ea0364f1SPeter Tyser 1554841ab5SWolfgang Denk int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images) 16ea0364f1SPeter Tyser { 17ea0364f1SPeter Tyser void (*kernel)(int, int, int, char *) = (void *)images->ep; 18ea0364f1SPeter Tyser char *commandline = getenv("bootargs"); 19ea0364f1SPeter Tyser ulong initrd_start = images->rd_start; 20ea0364f1SPeter Tyser ulong initrd_end = images->rd_end; 2106c5d30dSThomas Chou char *of_flat_tree = NULL; 2206c5d30dSThomas Chou #if defined(CONFIG_OF_LIBFDT) 235a75e121SJohn Rigby /* did generic code already find a device tree? */ 245a75e121SJohn Rigby if (images->ft_len) 255a75e121SJohn Rigby of_flat_tree = images->ft_addr; 2606c5d30dSThomas Chou #endif 27983c72f4SSimon Glass if (!of_flat_tree && argc > 1) 28983c72f4SSimon Glass of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16); 2906c5d30dSThomas Chou if (of_flat_tree) 3006c5d30dSThomas Chou initrd_end = (ulong)of_flat_tree; 31ea0364f1SPeter Tyser 322cb0e55aSAndreas Bießmann /* 332cb0e55aSAndreas Bießmann * allow the PREP bootm subcommand, it is required for bootm to work 342cb0e55aSAndreas Bießmann */ 352cb0e55aSAndreas Bießmann if (flag & BOOTM_STATE_OS_PREP) 362cb0e55aSAndreas Bießmann return 0; 372cb0e55aSAndreas Bießmann 38ea0364f1SPeter Tyser if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) 39ea0364f1SPeter Tyser return 1; 40ea0364f1SPeter Tyser 41ea0364f1SPeter Tyser /* flushes data and instruction caches before calling the kernel */ 42ea0364f1SPeter Tyser disable_interrupts(); 43ea0364f1SPeter Tyser flush_dcache((ulong)kernel, CONFIG_SYS_DCACHE_SIZE); 44ea0364f1SPeter Tyser flush_icache((ulong)kernel, CONFIG_SYS_ICACHE_SIZE); 45ea0364f1SPeter Tyser 46ea0364f1SPeter Tyser debug("bootargs=%s @ 0x%lx\n", commandline, (ulong)&commandline); 47ea0364f1SPeter Tyser debug("initrd=0x%lx-0x%lx\n", (ulong)initrd_start, (ulong)initrd_end); 4806c5d30dSThomas Chou /* kernel parameters passing 4906c5d30dSThomas Chou * r4 : NIOS magic 5006c5d30dSThomas Chou * r5 : initrd start 5106c5d30dSThomas Chou * r6 : initrd end or fdt 5206c5d30dSThomas Chou * r7 : kernel command line 5306c5d30dSThomas Chou * fdt is passed to kernel via r6, the same as initrd_end. fdt will be 5406c5d30dSThomas Chou * verified with fdt magic. when both initrd and fdt are used at the 5506c5d30dSThomas Chou * same time, fdt must follow immediately after initrd. 5606c5d30dSThomas Chou */ 57ea0364f1SPeter Tyser kernel(NIOS_MAGIC, initrd_start, initrd_end, commandline); 58ea0364f1SPeter Tyser /* does not return */ 59ea0364f1SPeter Tyser 60ea0364f1SPeter Tyser return 1; 61ea0364f1SPeter Tyser } 62