1*83d290c5STom Rini // SPDX-License-Identifier: GPL-2.0+
2ea0364f1SPeter Tyser /*
3ea0364f1SPeter Tyser * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
4ea0364f1SPeter Tyser * Scott McNutt <smcnutt@psyent.com>
5ea0364f1SPeter Tyser */
6ea0364f1SPeter Tyser
7ea0364f1SPeter Tyser #include <common.h>
8ea0364f1SPeter Tyser
9ea0364f1SPeter Tyser #define NIOS_MAGIC 0x534f494e /* enable command line and initrd passing */
10ea0364f1SPeter Tyser
do_bootm_linux(int flag,int argc,char * const argv[],bootm_headers_t * images)1154841ab5SWolfgang Denk int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
12ea0364f1SPeter Tyser {
13ea0364f1SPeter Tyser void (*kernel)(int, int, int, char *) = (void *)images->ep;
1400caae6dSSimon Glass char *commandline = env_get("bootargs");
15ea0364f1SPeter Tyser ulong initrd_start = images->rd_start;
16ea0364f1SPeter Tyser ulong initrd_end = images->rd_end;
1706c5d30dSThomas Chou char *of_flat_tree = NULL;
1806c5d30dSThomas Chou #if defined(CONFIG_OF_LIBFDT)
195a75e121SJohn Rigby /* did generic code already find a device tree? */
205a75e121SJohn Rigby if (images->ft_len)
215a75e121SJohn Rigby of_flat_tree = images->ft_addr;
2206c5d30dSThomas Chou #endif
23983c72f4SSimon Glass if (!of_flat_tree && argc > 1)
24983c72f4SSimon Glass of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16);
2506c5d30dSThomas Chou if (of_flat_tree)
2606c5d30dSThomas Chou initrd_end = (ulong)of_flat_tree;
27ea0364f1SPeter Tyser
282cb0e55aSAndreas Bießmann /*
292cb0e55aSAndreas Bießmann * allow the PREP bootm subcommand, it is required for bootm to work
302cb0e55aSAndreas Bießmann */
312cb0e55aSAndreas Bießmann if (flag & BOOTM_STATE_OS_PREP)
322cb0e55aSAndreas Bießmann return 0;
332cb0e55aSAndreas Bießmann
34ea0364f1SPeter Tyser if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
35ea0364f1SPeter Tyser return 1;
36ea0364f1SPeter Tyser
37ea0364f1SPeter Tyser /* flushes data and instruction caches before calling the kernel */
38ea0364f1SPeter Tyser disable_interrupts();
3921ff7344SThomas Chou flush_dcache_all();
40ea0364f1SPeter Tyser
41ea0364f1SPeter Tyser debug("bootargs=%s @ 0x%lx\n", commandline, (ulong)&commandline);
42ea0364f1SPeter Tyser debug("initrd=0x%lx-0x%lx\n", (ulong)initrd_start, (ulong)initrd_end);
4306c5d30dSThomas Chou /* kernel parameters passing
4406c5d30dSThomas Chou * r4 : NIOS magic
4506c5d30dSThomas Chou * r5 : initrd start
4606c5d30dSThomas Chou * r6 : initrd end or fdt
4706c5d30dSThomas Chou * r7 : kernel command line
4806c5d30dSThomas Chou * fdt is passed to kernel via r6, the same as initrd_end. fdt will be
4906c5d30dSThomas Chou * verified with fdt magic. when both initrd and fdt are used at the
5006c5d30dSThomas Chou * same time, fdt must follow immediately after initrd.
5106c5d30dSThomas Chou */
52ea0364f1SPeter Tyser kernel(NIOS_MAGIC, initrd_start, initrd_end, commandline);
53ea0364f1SPeter Tyser /* does not return */
54ea0364f1SPeter Tyser
55ea0364f1SPeter Tyser return 1;
56ea0364f1SPeter Tyser }
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