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
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2013 Freescale Semiconductor, Inc.
*/
#include <common.h>
#include <cpu_func.h>
#include <hang.h>
#include <mmc.h>
#include <malloc.h>
/*
* The environment variables are written to just after the u-boot image
* on SDCard, so we must read the MBR to get the start address and code
* length of the u-boot image, then calculate the address of the env.
*/
#define ESDHC_BOOT_IMAGE_SIZE 0x48
#define ESDHC_BOOT_IMAGE_ADDR 0x50
#define MBRDBR_BOOT_SIG_55 0x1fe
#define MBRDBR_BOOT_SIG_AA 0x1ff
#define CONFIG_CFG_DATA_SECTOR 0
void mmc_spl_load_image(uint32_t offs, unsigned int size, void *vdst)
{
uint blk_start, blk_cnt, err;
struct mmc *mmc = find_mmc_device(0);
if (!mmc) {
puts("spl: mmc device not found!!\n");
hang();
}
if (mmc_init(mmc)) {
puts("MMC init failed\n");
return;
}
blk_start = ALIGN(offs, mmc->read_bl_len) / mmc->read_bl_len;
blk_cnt = ALIGN(size, mmc->read_bl_len) / mmc->read_bl_len;
err = mmc->block_dev.block_read(&mmc->block_dev, blk_start, blk_cnt,
vdst);
if (err != blk_cnt) {
puts("spl: mmc read failed!!\n");
hang();
}
}
/*
* The main entry for mmc booting. It's necessary that SDRAM is already
* configured and available since this code loads the main U-Boot image
* from mmc into SDRAM and starts it from there.
*/
void __noreturn mmc_boot(void)
{
__attribute__((noreturn)) void (*uboot)(void);
uint blk_start, blk_cnt, err;
#ifndef CONFIG_FSL_CORENET
uchar *tmp_buf;
u32 blklen;
uchar val;
uint i, byte_num;
#endif
u32 offset, code_len;
struct mmc *mmc;
mmc = find_mmc_device(0);
if (!mmc) {
puts("spl: mmc device not found!!\n");
hang();
}
#ifdef CONFIG_FSL_CORENET
offset = CONFIG_SYS_MMC_U_BOOT_OFFS;
code_len = CONFIG_SYS_MMC_U_BOOT_SIZE;
#else
blklen = mmc->read_bl_len;
tmp_buf = malloc(blklen);
if (!tmp_buf) {
puts("spl: malloc memory failed!!\n");
hang();
}
memset(tmp_buf, 0, blklen);
/*
* Read source addr from sd card
*/
err = mmc->block_dev.block_read(&mmc->block_dev,
CONFIG_CFG_DATA_SECTOR, 1, tmp_buf);
if (err != 1) {
puts("spl: mmc read failed!!\n");
free(tmp_buf);
hang();
}
val = *(tmp_buf + MBRDBR_BOOT_SIG_55);
if (0x55 != val) {
puts("spl: mmc signature is not valid!!\n");
free(tmp_buf);
hang();
}
val = *(tmp_buf + MBRDBR_BOOT_SIG_AA);
if (0xAA != val) {
puts("spl: mmc signature is not valid!!\n");
free(tmp_buf);
hang();
}
byte_num = 4;
offset = 0;
for (i = 0; i < byte_num; i++) {
val = *(tmp_buf + ESDHC_BOOT_IMAGE_ADDR + i);
offset = (offset << 8) + val;
}
offset += CONFIG_SYS_MMC_U_BOOT_OFFS;
/* Get the code size from offset 0x48 */
byte_num = 4;
code_len = 0;
for (i = 0; i < byte_num; i++) {
val = *(tmp_buf + ESDHC_BOOT_IMAGE_SIZE + i);
code_len = (code_len << 8) + val;
}
code_len -= CONFIG_SYS_MMC_U_BOOT_OFFS;
/*
* Load U-Boot image from mmc into RAM
*/
#endif
blk_start = ALIGN(offset, mmc->read_bl_len) / mmc->read_bl_len;
blk_cnt = ALIGN(code_len, mmc->read_bl_len) / mmc->read_bl_len;
err = mmc->block_dev.block_read(&mmc->block_dev, blk_start, blk_cnt,
(uchar *)CONFIG_SYS_MMC_U_BOOT_DST);
if (err != blk_cnt) {
puts("spl: mmc read failed!!\n");
#ifndef CONFIG_FSL_CORENET
free(tmp_buf);
#endif
hang();
}
/*
* Clean d-cache and invalidate i-cache, to
* make sure that no stale data is executed.
*/
flush_cache(CONFIG_SYS_MMC_U_BOOT_DST, CONFIG_SYS_MMC_U_BOOT_SIZE);
/*
* Jump to U-Boot image
*/
uboot = (void *)CONFIG_SYS_MMC_U_BOOT_START;
(*uboot)();
}
|
