mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +09:00
db41d65a97
At present panic() is in the vsprintf.h header file. That does not seem like an obvious choice for hang(), even though it relates to panic(). So let's put hang() in its own header. Signed-off-by: Simon Glass <sjg@chromium.org> [trini: Migrate a few more files] Signed-off-by: Tom Rini <trini@konsulko.com>
154 lines
3.5 KiB
C
154 lines
3.5 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 <cpu_func.h>
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#include <hang.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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