blob: 4e5c269193d9d32ee7dc83650a6d7a88e47aedb6 [file] [log] [blame]
wdenk5c952cf2004-10-10 21:27:30 +00001/*
2 * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
3 * Scott McNutt <smcnutt@psyent.com>
4 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02005 * SPDX-License-Identifier: GPL-2.0+
wdenk5c952cf2004-10-10 21:27:30 +00006 */
7
8#include <common.h>
wdenk5c952cf2004-10-10 21:27:30 +00009
Thomas Choued294152010-03-24 11:41:46 +080010#define NIOS_MAGIC 0x534f494e /* enable command line and initrd passing */
11
Wolfgang Denk54841ab2010-06-28 22:00:46 +020012int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
wdenk5c952cf2004-10-10 21:27:30 +000013{
Thomas Choued294152010-03-24 11:41:46 +080014 void (*kernel)(int, int, int, char *) = (void *)images->ep;
15 char *commandline = getenv("bootargs");
16 ulong initrd_start = images->rd_start;
17 ulong initrd_end = images->rd_end;
Thomas Chou06c5d302010-05-31 11:58:05 +080018 char *of_flat_tree = NULL;
19#if defined(CONFIG_OF_LIBFDT)
John Rigby5a75e122010-10-13 13:57:34 -060020 /* did generic code already find a device tree? */
21 if (images->ft_len)
22 of_flat_tree = images->ft_addr;
Thomas Chou06c5d302010-05-31 11:58:05 +080023#endif
Simon Glass983c72f2013-06-11 11:14:46 -070024 if (!of_flat_tree && argc > 1)
25 of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16);
Thomas Chou06c5d302010-05-31 11:58:05 +080026 if (of_flat_tree)
27 initrd_end = (ulong)of_flat_tree;
wdenk0c1c117c2005-03-30 23:28:18 +000028
Andreas Bießmann2cb0e552013-07-02 13:57:44 +020029 /*
30 * allow the PREP bootm subcommand, it is required for bootm to work
31 */
32 if (flag & BOOTM_STATE_OS_PREP)
33 return 0;
34
Kumar Gala49c3a862008-10-21 17:25:45 -050035 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
36 return 1;
37
Renato Andreola0a7691e2009-11-23 16:45:14 -050038 /* flushes data and instruction caches before calling the kernel */
Thomas Choued294152010-03-24 11:41:46 +080039 disable_interrupts();
Thomas Chou21ff7342015-10-23 07:58:20 +080040 flush_dcache_all();
Renato Andreola0a7691e2009-11-23 16:45:14 -050041
Thomas Choued294152010-03-24 11:41:46 +080042 debug("bootargs=%s @ 0x%lx\n", commandline, (ulong)&commandline);
43 debug("initrd=0x%lx-0x%lx\n", (ulong)initrd_start, (ulong)initrd_end);
Thomas Chou06c5d302010-05-31 11:58:05 +080044 /* kernel parameters passing
45 * r4 : NIOS magic
46 * r5 : initrd start
47 * r6 : initrd end or fdt
48 * r7 : kernel command line
49 * fdt is passed to kernel via r6, the same as initrd_end. fdt will be
50 * verified with fdt magic. when both initrd and fdt are used at the
51 * same time, fdt must follow immediately after initrd.
52 */
Thomas Choued294152010-03-24 11:41:46 +080053 kernel(NIOS_MAGIC, initrd_start, initrd_end, commandline);
Marian Balakowiczcd7c5962008-03-12 10:33:00 +010054 /* does not return */
Marian Balakowiczcd7c5962008-03-12 10:33:00 +010055
Kumar Gala40d7e992008-08-15 08:24:45 -050056 return 1;
wdenk5c952cf2004-10-10 21:27:30 +000057}