2 * Copyright 2013 Freescale Semiconductor, Inc.
4 * SPDX-License-Identifier: GPL-2.0+
12 * The environment variables are written to just after the u-boot image
13 * on SDCard, so we must read the MBR to get the start address and code
14 * length of the u-boot image, then calculate the address of the env.
16 #define ESDHC_BOOT_IMAGE_SIZE 0x48
17 #define ESDHC_BOOT_IMAGE_ADDR 0x50
18 #define MBRDBR_BOOT_SIG_55 0x1fe
19 #define MBRDBR_BOOT_SIG_AA 0x1ff
20 #define CONFIG_CFG_DATA_SECTOR 0
23 void mmc_spl_load_image(uint32_t offs, unsigned int size, void *vdst)
25 uint blk_start, blk_cnt, err;
27 struct mmc *mmc = find_mmc_device(0);
29 puts("spl: mmc device not found!!\n");
34 puts("MMC init failed\n");
38 blk_start = ALIGN(offs, mmc->read_bl_len) / mmc->read_bl_len;
39 blk_cnt = ALIGN(size, mmc->read_bl_len) / mmc->read_bl_len;
41 err = mmc->block_dev.block_read(&mmc->block_dev, blk_start, blk_cnt,
44 puts("spl: mmc read failed!!\n");
50 * The main entry for mmc booting. It's necessary that SDRAM is already
51 * configured and available since this code loads the main U-Boot image
52 * from mmc into SDRAM and starts it from there.
55 void __noreturn mmc_boot(void)
57 __attribute__((noreturn)) void (*uboot)(void);
58 uint blk_start, blk_cnt, err;
59 #ifndef CONFIG_FSL_CORENET
68 mmc = find_mmc_device(0);
70 puts("spl: mmc device not found!!\n");
74 #ifdef CONFIG_FSL_CORENET
75 offset = CONFIG_SYS_MMC_U_BOOT_OFFS;
76 code_len = CONFIG_SYS_MMC_U_BOOT_SIZE;
78 blklen = mmc->read_bl_len;
79 tmp_buf = malloc(blklen);
81 puts("spl: malloc memory failed!!\n");
84 memset(tmp_buf, 0, blklen);
87 * Read source addr from sd card
89 err = mmc->block_dev.block_read(&mmc->block_dev,
90 CONFIG_CFG_DATA_SECTOR, 1, tmp_buf);
92 puts("spl: mmc read failed!!\n");
97 val = *(tmp_buf + MBRDBR_BOOT_SIG_55);
99 puts("spl: mmc signature is not valid!!\n");
103 val = *(tmp_buf + MBRDBR_BOOT_SIG_AA);
105 puts("spl: mmc signature is not valid!!\n");
112 for (i = 0; i < byte_num; i++) {
113 val = *(tmp_buf + ESDHC_BOOT_IMAGE_ADDR + i);
114 offset = (offset << 8) + val;
116 offset += CONFIG_SYS_MMC_U_BOOT_OFFS;
117 /* Get the code size from offset 0x48 */
120 for (i = 0; i < byte_num; i++) {
121 val = *(tmp_buf + ESDHC_BOOT_IMAGE_SIZE + i);
122 code_len = (code_len << 8) + val;
124 code_len -= CONFIG_SYS_MMC_U_BOOT_OFFS;
126 * Load U-Boot image from mmc into RAM
129 blk_start = ALIGN(offset, mmc->read_bl_len) / mmc->read_bl_len;
130 blk_cnt = ALIGN(code_len, mmc->read_bl_len) / mmc->read_bl_len;
131 err = mmc->block_dev.block_read(&mmc->block_dev, blk_start, blk_cnt,
132 (uchar *)CONFIG_SYS_MMC_U_BOOT_DST);
133 if (err != blk_cnt) {
134 puts("spl: mmc read failed!!\n");
135 #ifndef CONFIG_FSL_CORENET
142 * Clean d-cache and invalidate i-cache, to
143 * make sure that no stale data is executed.
145 flush_cache(CONFIG_SYS_MMC_U_BOOT_DST, CONFIG_SYS_MMC_U_BOOT_SIZE);
148 * Jump to U-Boot image
150 uboot = (void *)CONFIG_SYS_MMC_U_BOOT_START;