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add12cb688
This patch renames the board directory from board/freescale to board/nxp because NXP now provides Board Support Packages (BSPs) and tools for the former Freescale i.MX and other i.MX products. All relevant references have been updated accordingly. This change does not affect functionality. Signed-off-by: Alice Guo <alice.guo@nxp.com> Reviewed-by: Fabio Estevam <festevam@gmail.com>
79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2011 Freescale Semiconductor, Inc.
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*/
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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 ESDHC_DEFAULT_ENVADDR 0x400
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int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr)
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{
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u8 *tmp_buf;
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u32 blklen, code_offset, code_len, n;
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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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return 1;
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/* read out the first block, get the config data information */
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#ifdef CONFIG_BLK
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n = blk_dread(mmc_get_blk_desc(mmc), 0, 1, tmp_buf);
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#else
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n = mmc->block_dev.block_read(&mmc->block_dev, 0, 1, tmp_buf);
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#endif
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if (!n) {
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free(tmp_buf);
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return 1;
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}
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/* Get the Source Address, from offset 0x50 */
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code_offset = *(u32 *)(tmp_buf + ESDHC_BOOT_IMAGE_ADDR);
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/* Get the code size from offset 0x48 */
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code_len = *(u32 *)(tmp_buf + ESDHC_BOOT_IMAGE_SIZE);
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#ifdef CONFIG_ESDHC_HC_BLK_ADDR
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/*
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* On soc BSC9131, BSC9132:
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* In High Capacity SD Cards (> 2 GBytes), the 32-bit source address and
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* code length of these soc specify the memory address in block address
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* format. Block length is fixed to 512 bytes as per the SD High
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* Capacity specification.
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*/
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u64 tmp;
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if (mmc->high_capacity) {
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tmp = (u64)code_offset * blklen;
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tmp += code_len * blklen;
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} else
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tmp = code_offset + code_len;
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if ((tmp + CONFIG_ENV_SIZE > mmc->capacity) ||
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(tmp > 0xFFFFFFFFU))
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*env_addr = ESDHC_DEFAULT_ENVADDR;
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else
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*env_addr = tmp;
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free(tmp_buf);
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return 0;
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#endif
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*env_addr = code_offset + code_len;
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free(tmp_buf);
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return 0;
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}
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