1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2013 Freescale Semiconductor, Inc.
12 #ifndef CONFIG_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
29 void mmc_spl_load_image(uint32_t offs, unsigned int size, void *vdst)
31 uint blk_start, blk_cnt, err;
33 struct mmc *mmc = find_mmc_device(0);
35 puts("spl: mmc device not found!!\n");
40 puts("MMC init failed\n");
44 blk_start = ALIGN(offs, mmc->read_bl_len) / mmc->read_bl_len;
45 blk_cnt = ALIGN(size, mmc->read_bl_len) / mmc->read_bl_len;
47 err = mmc->block_dev.block_read(&mmc->block_dev, blk_start, blk_cnt,
50 puts("spl: mmc read failed!!\n");
56 * The main entry for mmc booting. It's necessary that SDRAM is already
57 * configured and available since this code loads the main U-Boot image
58 * from mmc into SDRAM and starts it from there.
61 void __noreturn mmc_boot(void)
63 __attribute__((noreturn)) void (*uboot)(void);
64 uint blk_start, blk_cnt, err;
68 #ifndef CONFIG_FSL_CORENET
70 #ifndef CONFIG_SPL_FSL_PBL
79 mmc = find_mmc_device(0);
81 puts("spl: mmc device not found!!\n");
86 puts("spl: mmc device init failed!\n");
90 blklen = mmc->read_bl_len;
93 tmp_buf = malloc(blklen);
95 puts("spl: malloc memory failed!!\n");
99 #ifdef CONFIG_FSL_CORENET
100 offset = CONFIG_SYS_MMC_U_BOOT_OFFS;
104 memset(tmp_buf, 0, blklen);
107 * Read source addr from sd card
109 blk_start = (sector * 512) / mmc->read_bl_len;
110 blk_off = (sector * 512) % mmc->read_bl_len;
111 blk_cnt = DIV_ROUND_UP(512, mmc->read_bl_len);
112 err = mmc->block_dev.block_read(&mmc->block_dev, blk_start, blk_cnt, tmp_buf);
113 if (err != blk_cnt) {
114 puts("spl: mmc read failed!!\n");
118 #ifdef CONFIG_SPL_FSL_PBL
119 val = *(tmp_buf + blk_off + MBRDBR_BOOT_SIG_55);
121 puts("spl: mmc MBR/DBR signature is not valid!!\n");
124 val = *(tmp_buf + blk_off + MBRDBR_BOOT_SIG_AA);
126 puts("spl: mmc MBR/DBR signature is not valid!!\n");
131 * Booting from On-Chip ROM (eSDHC or eSPI), Document Number: AN3659, Rev. 2, 06/2012.
132 * Pre-PBL BootROMs (MPC8536E, MPC8569E, P2020, P1011, P1012, P1013, P1020, P1021, P1022)
133 * require custom BOOT signature on sector 0 and MBR/DBR signature is not required at all.
137 for (i = 0; i < byte_num; i++) {
138 val = *(tmp_buf + blk_off + ESDHC_BOOT_SIGNATURE_OFF + i);
139 val32 = (val32 << 8) + val;
141 if (val32 != ESDHC_BOOT_SIGNATURE) {
142 /* BOOT signature may be on the first 24 sectors (each being 512 bytes) */
145 puts("spl: mmc BOOT signature is not valid!!\n");
152 for (i = 0; i < byte_num; i++) {
153 val = *(tmp_buf + blk_off + ESDHC_BOOT_IMAGE_ADDR + i);
154 offset = (offset << 8) + val;
156 #ifndef CONFIG_SYS_MMC_U_BOOT_OFFS
157 offset += (ulong)&mmc_u_boot_offs - CONFIG_SPL_TEXT_BASE;
159 offset += CONFIG_SYS_MMC_U_BOOT_OFFS;
163 * Load U-Boot image from mmc into RAM
165 code_len = CONFIG_SYS_MMC_U_BOOT_SIZE;
166 blk_start = offset / mmc->read_bl_len;
167 blk_off = offset % mmc->read_bl_len;
168 blk_cnt = ALIGN(code_len, mmc->read_bl_len) / mmc->read_bl_len + 1;
170 err = mmc->block_dev.block_read(&mmc->block_dev,
171 blk_start, 1, tmp_buf);
173 puts("spl: mmc read failed!!\n");
178 err = mmc->block_dev.block_read(&mmc->block_dev, blk_start, blk_cnt,
179 (uchar *)CONFIG_SYS_MMC_U_BOOT_DST +
180 (blk_off ? (mmc->read_bl_len - blk_off) : 0));
181 if (err != blk_cnt) {
182 puts("spl: mmc read failed!!\n");
187 * SDHC DMA may erase bytes at dst + bl_len - blk_off - 8
188 * due to unaligned access. So copy leading bytes from tmp_buf
189 * after SDHC DMA transfer.
192 memcpy((uchar *)CONFIG_SYS_MMC_U_BOOT_DST,
193 tmp_buf + blk_off, mmc->read_bl_len - blk_off);
196 * Clean d-cache and invalidate i-cache, to
197 * make sure that no stale data is executed.
199 flush_cache(CONFIG_SYS_MMC_U_BOOT_DST, CONFIG_SYS_MMC_U_BOOT_SIZE);
202 * Jump to U-Boot image
204 uboot = (void *)CONFIG_SYS_MMC_U_BOOT_START;