| /* | |
| * (C) Copyright 2003, Psyent Corporation <www.psyent.com> | |
| * Scott McNutt <smcnutt@psyent.com> | |
| * | |
| * SPDX-License-Identifier: GPL-2.0+ | |
| */ | |
| #include <common.h> | |
| #define NIOS_MAGIC 0x534f494e /* enable command line and initrd passing */ | |
| int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images) | |
| { | |
| void (*kernel)(int, int, int, char *) = (void *)images->ep; | |
| char *commandline = env_get("bootargs"); | |
| ulong initrd_start = images->rd_start; | |
| ulong initrd_end = images->rd_end; | |
| char *of_flat_tree = NULL; | |
| #if defined(CONFIG_OF_LIBFDT) | |
| /* did generic code already find a device tree? */ | |
| if (images->ft_len) | |
| of_flat_tree = images->ft_addr; | |
| #endif | |
| if (!of_flat_tree && argc > 1) | |
| of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16); | |
| if (of_flat_tree) | |
| initrd_end = (ulong)of_flat_tree; | |
| /* | |
| * allow the PREP bootm subcommand, it is required for bootm to work | |
| */ | |
| if (flag & BOOTM_STATE_OS_PREP) | |
| return 0; | |
| if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) | |
| return 1; | |
| /* flushes data and instruction caches before calling the kernel */ | |
| disable_interrupts(); | |
| flush_dcache_all(); | |
| debug("bootargs=%s @ 0x%lx\n", commandline, (ulong)&commandline); | |
| debug("initrd=0x%lx-0x%lx\n", (ulong)initrd_start, (ulong)initrd_end); | |
| /* kernel parameters passing | |
| * r4 : NIOS magic | |
| * r5 : initrd start | |
| * r6 : initrd end or fdt | |
| * r7 : kernel command line | |
| * fdt is passed to kernel via r6, the same as initrd_end. fdt will be | |
| * verified with fdt magic. when both initrd and fdt are used at the | |
| * same time, fdt must follow immediately after initrd. | |
| */ | |
| kernel(NIOS_MAGIC, initrd_start, initrd_end, commandline); | |
| /* does not return */ | |
| return 1; | |
| } |