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wdenk5c952cf2004-10-10 21:27:30 +00001/*
2 * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
3 * Scott McNutt <smcnutt@psyent.com>
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24#include <common.h>
25#include <command.h>
wdenk0c1c117c2005-03-30 23:28:18 +000026#include <asm/byteorder.h>
Renato Andreola0a7691e2009-11-23 16:45:14 -050027#include <asm/cache.h>
wdenk5c952cf2004-10-10 21:27:30 +000028
Thomas Choued294152010-03-24 11:41:46 +080029#define NIOS_MAGIC 0x534f494e /* enable command line and initrd passing */
30
Wolfgang Denk54841ab2010-06-28 22:00:46 +020031int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
wdenk5c952cf2004-10-10 21:27:30 +000032{
Thomas Choued294152010-03-24 11:41:46 +080033 void (*kernel)(int, int, int, char *) = (void *)images->ep;
34 char *commandline = getenv("bootargs");
35 ulong initrd_start = images->rd_start;
36 ulong initrd_end = images->rd_end;
Thomas Chou06c5d302010-05-31 11:58:05 +080037 char *of_flat_tree = NULL;
38#if defined(CONFIG_OF_LIBFDT)
John Rigby5a75e122010-10-13 13:57:34 -060039 /* did generic code already find a device tree? */
40 if (images->ft_len)
41 of_flat_tree = images->ft_addr;
Thomas Chou06c5d302010-05-31 11:58:05 +080042#endif
Thomas Chou62a05572010-07-30 14:12:12 +080043 if (!of_flat_tree && argc > 3)
Thomas Chou06c5d302010-05-31 11:58:05 +080044 of_flat_tree = (char *)simple_strtoul(argv[3], NULL, 16);
45 if (of_flat_tree)
46 initrd_end = (ulong)of_flat_tree;
wdenk0c1c117c2005-03-30 23:28:18 +000047
Kumar Gala49c3a862008-10-21 17:25:45 -050048 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
49 return 1;
50
Renato Andreola0a7691e2009-11-23 16:45:14 -050051 /* flushes data and instruction caches before calling the kernel */
Thomas Choued294152010-03-24 11:41:46 +080052 disable_interrupts();
53 flush_dcache((ulong)kernel, CONFIG_SYS_DCACHE_SIZE);
54 flush_icache((ulong)kernel, CONFIG_SYS_ICACHE_SIZE);
Renato Andreola0a7691e2009-11-23 16:45:14 -050055
Thomas Choued294152010-03-24 11:41:46 +080056 debug("bootargs=%s @ 0x%lx\n", commandline, (ulong)&commandline);
57 debug("initrd=0x%lx-0x%lx\n", (ulong)initrd_start, (ulong)initrd_end);
Thomas Chou06c5d302010-05-31 11:58:05 +080058 /* kernel parameters passing
59 * r4 : NIOS magic
60 * r5 : initrd start
61 * r6 : initrd end or fdt
62 * r7 : kernel command line
63 * fdt is passed to kernel via r6, the same as initrd_end. fdt will be
64 * verified with fdt magic. when both initrd and fdt are used at the
65 * same time, fdt must follow immediately after initrd.
66 */
Thomas Choued294152010-03-24 11:41:46 +080067 kernel(NIOS_MAGIC, initrd_start, initrd_end, commandline);
Marian Balakowiczcd7c5962008-03-12 10:33:00 +010068 /* does not return */
Marian Balakowiczcd7c5962008-03-12 10:33:00 +010069
Kumar Gala40d7e992008-08-15 08:24:45 -050070 return 1;
wdenk5c952cf2004-10-10 21:27:30 +000071}