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wdenk4e5ca3e2003-12-08 01:34:36 +00001/*
2 * (C) Copyright 2003
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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 modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (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
wdenkbf9e3b32004-02-12 00:47:09 +000015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wdenk4e5ca3e2003-12-08 01:34:36 +000016 * 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
wdenkbf9e3b32004-02-12 00:47:09 +000020 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
wdenk4e5ca3e2003-12-08 01:34:36 +000021 *
22 */
23
24#include <common.h>
25#include <command.h>
wdenk4e5ca3e2003-12-08 01:34:36 +000026#include <image.h>
27#include <zlib.h>
TsiChungLiew8ae158c2007-08-16 15:05:11 -050028#include <bzlib.h>
TsiChungLiew688e8eb2007-10-25 17:14:00 -050029#include <watchdog.h>
TsiChungLiew8ae158c2007-08-16 15:05:11 -050030#include <environment.h>
wdenk4e5ca3e2003-12-08 01:34:36 +000031#include <asm/byteorder.h>
Marian Balakowiczb6b0fe62008-01-31 13:58:13 +010032#ifdef CONFIG_SHOW_BOOT_PROGRESS
33# include <status_led.h>
34#endif
wdenk4e5ca3e2003-12-08 01:34:36 +000035
Wolfgang Denkd87080b2006-03-31 18:32:53 +020036DECLARE_GLOBAL_DATA_PTR;
37
wdenk4e5ca3e2003-12-08 01:34:36 +000038#define PHYSADDR(x) x
39
wdenkbf9e3b32004-02-12 00:47:09 +000040#define LINUX_MAX_ENVS 256
41#define LINUX_MAX_ARGS 256
wdenk4e5ca3e2003-12-08 01:34:36 +000042
Marian Balakowiczceaed2b2008-01-31 13:57:17 +010043static ulong get_sp (void);
Marian Balakowiczb6b0fe62008-01-31 13:58:13 +010044static void set_clocks_in_mhz (bd_t *kbd);
Marian Balakowiczceaed2b2008-01-31 13:57:17 +010045
Kumar Gala76da19d2008-10-16 21:52:08 -050046void arch_lmb_reserve(struct lmb *lmb)
wdenk4e5ca3e2003-12-08 01:34:36 +000047{
Kumar Galae822d7f2008-02-27 21:51:49 -060048 ulong sp;
Marian Balakowiczf13e7b22008-01-08 18:12:17 +010049
TsiChungLiew8ae158c2007-08-16 15:05:11 -050050 /*
51 * Booting a (Linux) kernel image
52 *
53 * Allocate space for command line and board info - the
54 * address should be as high as possible within the reach of
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020055 * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
TsiChungLiew8ae158c2007-08-16 15:05:11 -050056 * memory, which means far enough below the current stack
57 * pointer.
58 */
Marian Balakowiczb6b0fe62008-01-31 13:58:13 +010059 sp = get_sp();
60 debug ("## Current stack ends at 0x%08lx ", sp);
Stefan Roese8280f6a2007-08-18 14:33:02 +020061
Kumar Galae822d7f2008-02-27 21:51:49 -060062 /* adjust sp by 1K to be safe */
63 sp -= 1024;
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020064 lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + gd->ram_size - sp));
Kumar Gala76da19d2008-10-16 21:52:08 -050065}
66
67int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
68{
69 ulong rd_len;
70 ulong initrd_start, initrd_end;
71 int ret;
72
73 ulong cmd_start, cmd_end;
74 ulong bootmap_base;
75 bd_t *kbd;
76 void (*kernel) (bd_t *, ulong, ulong, ulong, ulong);
77 struct lmb *lmb = &images->lmb;
78
Kumar Gala49c3a862008-10-21 17:25:45 -050079 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
80 return 1;
81
Kumar Gala76da19d2008-10-16 21:52:08 -050082 bootmap_base = getenv_bootm_low();
TsiChungLiew8ae158c2007-08-16 15:05:11 -050083
Marian Balakowiczb6b0fe62008-01-31 13:58:13 +010084 /* allocate space and init command line */
Marian Balakowicz9a4daad2008-02-29 14:58:34 +010085 ret = boot_get_cmdline (lmb, &cmd_start, &cmd_end, bootmap_base);
Kumar Galae822d7f2008-02-27 21:51:49 -060086 if (ret) {
87 puts("ERROR with allocation of cmdline\n");
88 goto error;
89 }
TsiChungLiew8ae158c2007-08-16 15:05:11 -050090
Marian Balakowiczb6b0fe62008-01-31 13:58:13 +010091 /* allocate space for kernel copy of board info */
Marian Balakowicz9a4daad2008-02-29 14:58:34 +010092 ret = boot_get_kbd (lmb, &kbd, bootmap_base);
Kumar Galae822d7f2008-02-27 21:51:49 -060093 if (ret) {
94 puts("ERROR with allocation of kernel bd\n");
95 goto error;
96 }
Marian Balakowiczb6b0fe62008-01-31 13:58:13 +010097 set_clocks_in_mhz(kbd);
TsiChungLiew8ae158c2007-08-16 15:05:11 -050098
Kumar Galac160a952008-08-15 08:24:36 -050099 kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))images->ep;
wdenk4e5ca3e2003-12-08 01:34:36 +0000100
Kumar Galac4f94192008-08-15 08:24:37 -0500101 rd_len = images->rd_end - images->rd_start;
102 ret = boot_ramdisk_high (lmb, images->rd_start, rd_len,
Marian Balakowicz9a4daad2008-02-29 14:58:34 +0100103 &initrd_start, &initrd_end);
Kumar Galae822d7f2008-02-27 21:51:49 -0600104 if (ret)
105 goto error;
wdenk4e5ca3e2003-12-08 01:34:36 +0000106
TsiChungLiew8ae158c2007-08-16 15:05:11 -0500107 debug("## Transferring control to Linux (at address %08lx) ...\n",
108 (ulong) kernel);
wdenk4e5ca3e2003-12-08 01:34:36 +0000109
Marian Balakowiczb6b0fe62008-01-31 13:58:13 +0100110 show_boot_progress (15);
wdenk4e5ca3e2003-12-08 01:34:36 +0000111
TsiChungLiew8ae158c2007-08-16 15:05:11 -0500112 /*
113 * Linux Kernel Parameters (passing board info data):
Richard Retanubunedff7bc2009-02-20 13:01:56 -0500114 * sp+00: Ignore, side effect of using jsr to jump to kernel
115 * sp+04: ptr to board info data
116 * sp+08: initrd_start or 0 if no initrd
117 * sp+12: initrd_end - unused if initrd_start is 0
118 * sp+16: Start of command line string
119 * sp+20: End of command line string
TsiChungLiew8ae158c2007-08-16 15:05:11 -0500120 */
121 (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
122 /* does not return */
Kumar Gala274cea22008-02-27 21:51:46 -0600123error:
Kumar Gala40d7e992008-08-15 08:24:45 -0500124 return 1;
wdenk4e5ca3e2003-12-08 01:34:36 +0000125}
Marian Balakowiczceaed2b2008-01-31 13:57:17 +0100126
127static ulong get_sp (void)
128{
129 ulong sp;
130
131 asm("movel %%a7, %%d0\n"
132 "movel %%d0, %0\n": "=d"(sp): :"%d0");
133
134 return sp;
135}
Marian Balakowiczb6b0fe62008-01-31 13:58:13 +0100136
137static void set_clocks_in_mhz (bd_t *kbd)
138{
139 char *s;
140
141 if ((s = getenv("clocks_in_mhz")) != NULL) {
142 /* convert all clock information to MHz */
143 kbd->bi_intfreq /= 1000000L;
144 kbd->bi_busfreq /= 1000000L;
145 }
146}