mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-06 21:24:29 +00:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
151 lines
3.4 KiB
C
151 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2013 Freescale Semiconductor, Inc.
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*/
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#include <common.h>
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#include <mmc.h>
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#include <malloc.h>
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/*
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* The environment variables are written to just after the u-boot image
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* on SDCard, so we must read the MBR to get the start address and code
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* length of the u-boot image, then calculate the address of the env.
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*/
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#define ESDHC_BOOT_IMAGE_SIZE 0x48
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#define ESDHC_BOOT_IMAGE_ADDR 0x50
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#define MBRDBR_BOOT_SIG_55 0x1fe
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#define MBRDBR_BOOT_SIG_AA 0x1ff
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#define CONFIG_CFG_DATA_SECTOR 0
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void mmc_spl_load_image(uint32_t offs, unsigned int size, void *vdst)
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{
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uint blk_start, blk_cnt, err;
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struct mmc *mmc = find_mmc_device(0);
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if (!mmc) {
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puts("spl: mmc device not found!!\n");
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hang();
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}
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if (mmc_init(mmc)) {
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puts("MMC init failed\n");
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return;
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}
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blk_start = ALIGN(offs, mmc->read_bl_len) / mmc->read_bl_len;
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blk_cnt = ALIGN(size, mmc->read_bl_len) / mmc->read_bl_len;
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err = mmc->block_dev.block_read(&mmc->block_dev, blk_start, blk_cnt,
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vdst);
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if (err != blk_cnt) {
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puts("spl: mmc read failed!!\n");
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hang();
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}
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}
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/*
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* The main entry for mmc booting. It's necessary that SDRAM is already
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* configured and available since this code loads the main U-Boot image
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* from mmc into SDRAM and starts it from there.
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*/
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void __noreturn mmc_boot(void)
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{
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__attribute__((noreturn)) void (*uboot)(void);
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uint blk_start, blk_cnt, err;
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#ifndef CONFIG_FSL_CORENET
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uchar *tmp_buf;
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u32 blklen;
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uchar val;
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uint i, byte_num;
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#endif
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u32 offset, code_len;
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struct mmc *mmc;
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mmc = find_mmc_device(0);
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if (!mmc) {
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puts("spl: mmc device not found!!\n");
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hang();
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}
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#ifdef CONFIG_FSL_CORENET
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offset = CONFIG_SYS_MMC_U_BOOT_OFFS;
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code_len = CONFIG_SYS_MMC_U_BOOT_SIZE;
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#else
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blklen = mmc->read_bl_len;
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tmp_buf = malloc(blklen);
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if (!tmp_buf) {
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puts("spl: malloc memory failed!!\n");
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hang();
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}
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memset(tmp_buf, 0, blklen);
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/*
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* Read source addr from sd card
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*/
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err = mmc->block_dev.block_read(&mmc->block_dev,
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CONFIG_CFG_DATA_SECTOR, 1, tmp_buf);
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if (err != 1) {
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puts("spl: mmc read failed!!\n");
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free(tmp_buf);
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hang();
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}
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val = *(tmp_buf + MBRDBR_BOOT_SIG_55);
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if (0x55 != val) {
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puts("spl: mmc signature is not valid!!\n");
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free(tmp_buf);
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hang();
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}
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val = *(tmp_buf + MBRDBR_BOOT_SIG_AA);
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if (0xAA != val) {
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puts("spl: mmc signature is not valid!!\n");
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free(tmp_buf);
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hang();
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}
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byte_num = 4;
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offset = 0;
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for (i = 0; i < byte_num; i++) {
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val = *(tmp_buf + ESDHC_BOOT_IMAGE_ADDR + i);
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offset = (offset << 8) + val;
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}
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offset += CONFIG_SYS_MMC_U_BOOT_OFFS;
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/* Get the code size from offset 0x48 */
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byte_num = 4;
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code_len = 0;
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for (i = 0; i < byte_num; i++) {
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val = *(tmp_buf + ESDHC_BOOT_IMAGE_SIZE + i);
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code_len = (code_len << 8) + val;
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}
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code_len -= CONFIG_SYS_MMC_U_BOOT_OFFS;
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/*
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* Load U-Boot image from mmc into RAM
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*/
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#endif
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blk_start = ALIGN(offset, mmc->read_bl_len) / mmc->read_bl_len;
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blk_cnt = ALIGN(code_len, mmc->read_bl_len) / mmc->read_bl_len;
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err = mmc->block_dev.block_read(&mmc->block_dev, blk_start, blk_cnt,
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(uchar *)CONFIG_SYS_MMC_U_BOOT_DST);
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if (err != blk_cnt) {
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puts("spl: mmc read failed!!\n");
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#ifndef CONFIG_FSL_CORENET
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free(tmp_buf);
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#endif
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hang();
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}
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/*
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* Clean d-cache and invalidate i-cache, to
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* make sure that no stale data is executed.
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*/
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flush_cache(CONFIG_SYS_MMC_U_BOOT_DST, CONFIG_SYS_MMC_U_BOOT_SIZE);
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/*
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* Jump to U-Boot image
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*/
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uboot = (void *)CONFIG_SYS_MMC_U_BOOT_START;
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(*uboot)();
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}
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