1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*/
#include <common.h>
#include <bootstage.h>
#include <command.h>
#include <env.h>
#include <image.h>
#include <lmb.h>
#include <log.h>
#include <asm/global_data.h>
#include <u-boot/zlib.h>
#include <bzlib.h>
#include <watchdog.h>
#include <asm/byteorder.h>
#ifdef CONFIG_SHOW_BOOT_PROGRESS
# include <status_led.h>
#endif
DECLARE_GLOBAL_DATA_PTR;
#define PHYSADDR(x) x
#define LINUX_MAX_ENVS 256
#define LINUX_MAX_ARGS 256
static ulong get_sp (void);
static void set_clocks_in_mhz (struct bd_info *kbd);
void arch_lmb_reserve(struct lmb *lmb)
{
arch_lmb_reserve_generic(lmb, get_sp(), gd->ram_top, 1024);
}
int do_bootm_linux(int flag, int argc, char *const argv[],
bootm_headers_t *images)
{
int ret;
struct bd_info *kbd;
void (*kernel) (struct bd_info *, ulong, ulong, ulong, ulong);
struct lmb *lmb = &images->lmb;
/*
* 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;
/* allocate space for kernel copy of board info */
ret = boot_get_kbd (lmb, &kbd);
if (ret) {
puts("ERROR with allocation of kernel bd\n");
goto error;
}
set_clocks_in_mhz(kbd);
ret = image_setup_linux(images);
if (ret)
goto error;
kernel = (void (*)(struct bd_info *, ulong, ulong, ulong, ulong))images->ep;
debug("## Transferring control to Linux (at address %08lx) ...\n",
(ulong) kernel);
bootstage_mark(BOOTSTAGE_ID_RUN_OS);
/*
* Linux Kernel Parameters (passing board info data):
* sp+00: Ignore, side effect of using jsr to jump to kernel
* sp+04: ptr to board info data
* sp+08: initrd_start or 0 if no initrd
* sp+12: initrd_end - unused if initrd_start is 0
* sp+16: Start of command line string
* sp+20: End of command line string
*/
(*kernel)(kbd, images->initrd_start, images->initrd_end,
images->cmdline_start, images->cmdline_end);
/* does not return */
error:
return 1;
}
static ulong get_sp (void)
{
ulong sp;
asm("movel %%a7, %%d0\n"
"movel %%d0, %0\n": "=d"(sp): :"%d0");
return sp;
}
static void set_clocks_in_mhz (struct bd_info *kbd)
{
char *s;
s = env_get("clocks_in_mhz");
if (s) {
/* convert all clock information to MHz */
kbd->bi_intfreq /= 1000000L;
kbd->bi_busfreq /= 1000000L;
}
}
|
