| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * (C) Copyright 2003, Psyent Corporation <www.psyent.com> |
| * Scott McNutt <smcnutt@psyent.com> |
| */ |
| |
| #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; |
| } |
