1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2013 Freescale Semiconductor, Inc.
11 * The environment variables are written to just after the u-boot image
12 * on SDCard, so we must read the MBR to get the start address and code
13 * length of the u-boot image, then calculate the address of the env.
15 #define ESDHC_BOOT_IMAGE_SIZE 0x48
16 #define ESDHC_BOOT_IMAGE_ADDR 0x50
17 #define MBRDBR_BOOT_SIG_55 0x1fe
18 #define MBRDBR_BOOT_SIG_AA 0x1ff
19 #define CONFIG_CFG_DATA_SECTOR 0
22 void mmc_spl_load_image(uint32_t offs, unsigned int size, void *vdst)
24 uint blk_start, blk_cnt, err;
26 struct mmc *mmc = find_mmc_device(0);
28 puts("spl: mmc device not found!!\n");
33 puts("MMC init failed\n");
37 blk_start = ALIGN(offs, mmc->read_bl_len) / mmc->read_bl_len;
38 blk_cnt = ALIGN(size, mmc->read_bl_len) / mmc->read_bl_len;
40 err = mmc->block_dev.block_read(&mmc->block_dev, blk_start, blk_cnt,
43 puts("spl: mmc read failed!!\n");
49 * The main entry for mmc booting. It's necessary that SDRAM is already
50 * configured and available since this code loads the main U-Boot image
51 * from mmc into SDRAM and starts it from there.
54 void __noreturn mmc_boot(void)
56 __attribute__((noreturn)) void (*uboot)(void);
57 uint blk_start, blk_cnt, err;
58 #ifndef CONFIG_FSL_CORENET
67 mmc = find_mmc_device(0);
69 puts("spl: mmc device not found!!\n");
73 #ifdef CONFIG_FSL_CORENET
74 offset = CONFIG_SYS_MMC_U_BOOT_OFFS;
75 code_len = CONFIG_SYS_MMC_U_BOOT_SIZE;
77 blklen = mmc->read_bl_len;
78 tmp_buf = malloc(blklen);
80 puts("spl: malloc memory failed!!\n");
83 memset(tmp_buf, 0, blklen);
86 * Read source addr from sd card
88 err = mmc->block_dev.block_read(&mmc->block_dev,
89 CONFIG_CFG_DATA_SECTOR, 1, tmp_buf);
91 puts("spl: mmc read failed!!\n");
96 val = *(tmp_buf + MBRDBR_BOOT_SIG_55);
98 puts("spl: mmc signature is not valid!!\n");
102 val = *(tmp_buf + MBRDBR_BOOT_SIG_AA);
104 puts("spl: mmc signature is not valid!!\n");
111 for (i = 0; i < byte_num; i++) {
112 val = *(tmp_buf + ESDHC_BOOT_IMAGE_ADDR + i);
113 offset = (offset << 8) + val;
115 offset += CONFIG_SYS_MMC_U_BOOT_OFFS;
116 /* Get the code size from offset 0x48 */
119 for (i = 0; i < byte_num; i++) {
120 val = *(tmp_buf + ESDHC_BOOT_IMAGE_SIZE + i);
121 code_len = (code_len << 8) + val;
123 code_len -= CONFIG_SYS_MMC_U_BOOT_OFFS;
125 * Load U-Boot image from mmc into RAM
128 blk_start = ALIGN(offset, mmc->read_bl_len) / mmc->read_bl_len;
129 blk_cnt = ALIGN(code_len, mmc->read_bl_len) / mmc->read_bl_len;
130 err = mmc->block_dev.block_read(&mmc->block_dev, blk_start, blk_cnt,
131 (uchar *)CONFIG_SYS_MMC_U_BOOT_DST);
132 if (err != blk_cnt) {
133 puts("spl: mmc read failed!!\n");
134 #ifndef CONFIG_FSL_CORENET
141 * Clean d-cache and invalidate i-cache, to
142 * make sure that no stale data is executed.
144 flush_cache(CONFIG_SYS_MMC_U_BOOT_DST, CONFIG_SYS_MMC_U_BOOT_SIZE);
147 * Jump to U-Boot image
149 uboot = (void *)CONFIG_SYS_MMC_U_BOOT_START;