1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2013 Freescale Semiconductor, Inc.
12 #ifndef CFG_SYS_MMC_U_BOOT_OFFS
13 extern uchar mmc_u_boot_offs[];
17 * The environment variables are written to just after the u-boot image
18 * on SDCard, so we must read the MBR to get the start address and code
19 * length of the u-boot image, then calculate the address of the env.
21 #define ESDHC_BOOT_SIGNATURE_OFF 0x40
22 #define ESDHC_BOOT_SIGNATURE 0x424f4f54
23 #define ESDHC_BOOT_IMAGE_SIZE 0x48
24 #define ESDHC_BOOT_IMAGE_ADDR 0x50
25 #define MBRDBR_BOOT_SIG_55 0x1fe
26 #define MBRDBR_BOOT_SIG_AA 0x1ff
28 void mmc_spl_load_image(uint32_t offs, unsigned int size, void *vdst)
30 uint blk_start, blk_cnt, err;
32 struct mmc *mmc = find_mmc_device(0);
34 puts("spl: mmc device not found!!\n");
39 puts("MMC init failed\n");
43 blk_start = ALIGN(offs, mmc->read_bl_len) / mmc->read_bl_len;
44 blk_cnt = ALIGN(size, mmc->read_bl_len) / mmc->read_bl_len;
46 err = mmc->block_dev.block_read(&mmc->block_dev, blk_start, blk_cnt,
49 puts("spl: mmc read failed!!\n");
55 * The main entry for mmc booting. It's necessary that SDRAM is already
56 * configured and available since this code loads the main U-Boot image
57 * from mmc into SDRAM and starts it from there.
60 void __noreturn mmc_boot(void)
62 __attribute__((noreturn)) void (*uboot)(void);
63 uint blk_start, blk_cnt, err;
67 #ifndef CONFIG_FSL_CORENET
69 #ifndef CONFIG_SPL_FSL_PBL
78 mmc = find_mmc_device(0);
80 puts("spl: mmc device not found!!\n");
85 puts("spl: mmc device init failed!\n");
89 blklen = mmc->read_bl_len;
92 tmp_buf = malloc(blklen);
94 puts("spl: malloc memory failed!!\n");
98 #ifdef CONFIG_FSL_CORENET
99 offset = CFG_SYS_MMC_U_BOOT_OFFS;
103 memset(tmp_buf, 0, blklen);
106 * Read source addr from sd card
108 blk_start = (sector * 512) / mmc->read_bl_len;
109 blk_off = (sector * 512) % mmc->read_bl_len;
110 blk_cnt = DIV_ROUND_UP(512, mmc->read_bl_len);
111 err = mmc->block_dev.block_read(&mmc->block_dev, blk_start, blk_cnt, tmp_buf);
112 if (err != blk_cnt) {
113 puts("spl: mmc read failed!!\n");
117 #ifdef CONFIG_SPL_FSL_PBL
118 val = *(tmp_buf + blk_off + MBRDBR_BOOT_SIG_55);
120 puts("spl: mmc MBR/DBR signature is not valid!!\n");
123 val = *(tmp_buf + blk_off + MBRDBR_BOOT_SIG_AA);
125 puts("spl: mmc MBR/DBR signature is not valid!!\n");
130 * Booting from On-Chip ROM (eSDHC or eSPI), Document Number: AN3659, Rev. 2, 06/2012.
131 * Pre-PBL BootROMs (MPC8536E, MPC8569E, P2020, P1011, P1012, P1013, P1020, P1021, P1022)
132 * require custom BOOT signature on sector 0 and MBR/DBR signature is not required at all.
136 for (i = 0; i < byte_num; i++) {
137 val = *(tmp_buf + blk_off + ESDHC_BOOT_SIGNATURE_OFF + i);
138 val32 = (val32 << 8) + val;
140 if (val32 != ESDHC_BOOT_SIGNATURE) {
141 /* BOOT signature may be on the first 24 sectors (each being 512 bytes) */
144 puts("spl: mmc BOOT signature is not valid!!\n");
151 for (i = 0; i < byte_num; i++) {
152 val = *(tmp_buf + blk_off + ESDHC_BOOT_IMAGE_ADDR + i);
153 offset = (offset << 8) + val;
155 #ifndef CFG_SYS_MMC_U_BOOT_OFFS
156 offset += (ulong)&mmc_u_boot_offs - CONFIG_SPL_TEXT_BASE;
158 offset += CFG_SYS_MMC_U_BOOT_OFFS;
162 * Load U-Boot image from mmc into RAM
164 code_len = CFG_SYS_MMC_U_BOOT_SIZE;
165 blk_start = offset / mmc->read_bl_len;
166 blk_off = offset % mmc->read_bl_len;
167 blk_cnt = ALIGN(code_len, mmc->read_bl_len) / mmc->read_bl_len + 1;
169 err = mmc->block_dev.block_read(&mmc->block_dev,
170 blk_start, 1, tmp_buf);
172 puts("spl: mmc read failed!!\n");
177 err = mmc->block_dev.block_read(&mmc->block_dev, blk_start, blk_cnt,
178 (uchar *)CFG_SYS_MMC_U_BOOT_DST +
179 (blk_off ? (mmc->read_bl_len - blk_off) : 0));
180 if (err != blk_cnt) {
181 puts("spl: mmc read failed!!\n");
186 * SDHC DMA may erase bytes at dst + bl_len - blk_off - 8
187 * due to unaligned access. So copy leading bytes from tmp_buf
188 * after SDHC DMA transfer.
191 memcpy((uchar *)CFG_SYS_MMC_U_BOOT_DST,
192 tmp_buf + blk_off, mmc->read_bl_len - blk_off);
195 * Clean d-cache and invalidate i-cache, to
196 * make sure that no stale data is executed.
198 flush_cache(CFG_SYS_MMC_U_BOOT_DST, CFG_SYS_MMC_U_BOOT_SIZE);
201 * Jump to U-Boot image
203 uboot = (void *)CFG_SYS_MMC_U_BOOT_START;