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890feecaab
Add another custom environment flag which discerns environment coming from external storage from environment set by U-Boot itself. Signed-off-by: Marek Vasut <marex@denx.de> Reviewed-by: Tom Rini <trini@konsulko.com>
123 lines
2.5 KiB
C
123 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2010-2016 Freescale Semiconductor, Inc.
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*/
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/* #define DEBUG */
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#include <common.h>
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#include <command.h>
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#include <env.h>
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#include <env_internal.h>
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#include <linux/stddef.h>
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#include <errno.h>
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#include <memalign.h>
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#include <sata.h>
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#include <search.h>
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#if defined(CONFIG_ENV_OFFSET_REDUND)
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#error ENV REDUND not supported
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#endif
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#if !defined(CONFIG_ENV_OFFSET) || !defined(CONFIG_ENV_SIZE)
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#error CONFIG_ENV_OFFSET or CONFIG_ENV_SIZE not defined
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#endif
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__weak int sata_get_env_dev(void)
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{
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return CONFIG_SYS_SATA_ENV_DEV;
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}
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#ifdef CONFIG_CMD_SAVEENV
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static inline int write_env(struct blk_desc *sata, unsigned long size,
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unsigned long offset, void *buffer)
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{
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uint blk_start, blk_cnt, n;
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blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
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blk_cnt = ALIGN(size, sata->blksz) / sata->blksz;
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n = blk_dwrite(sata, blk_start, blk_cnt, buffer);
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return (n == blk_cnt) ? 0 : -1;
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}
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static int env_sata_save(void)
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{
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ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
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struct blk_desc *sata = NULL;
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int env_sata, ret;
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if (sata_initialize())
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return 1;
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env_sata = sata_get_env_dev();
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sata = sata_get_dev(env_sata);
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if (sata == NULL) {
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printf("Unknown SATA(%d) device for environment!\n",
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env_sata);
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return 1;
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}
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ret = env_export(env_new);
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if (ret)
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return 1;
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printf("Writing to SATA(%d)...", env_sata);
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if (write_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, (u_char *)env_new)) {
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puts("failed\n");
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return 1;
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}
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puts("done\n");
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return 0;
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}
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#endif /* CONFIG_CMD_SAVEENV */
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static inline int read_env(struct blk_desc *sata, unsigned long size,
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unsigned long offset, void *buffer)
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{
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uint blk_start, blk_cnt, n;
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blk_start = ALIGN(offset, sata->blksz) / sata->blksz;
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blk_cnt = ALIGN(size, sata->blksz) / sata->blksz;
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n = blk_dread(sata, blk_start, blk_cnt, buffer);
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return (n == blk_cnt) ? 0 : -1;
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}
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static void env_sata_load(void)
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{
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ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
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struct blk_desc *sata = NULL;
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int env_sata;
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if (sata_initialize())
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return -EIO;
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env_sata = sata_get_env_dev();
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sata = sata_get_dev(env_sata);
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if (sata == NULL) {
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printf("Unknown SATA(%d) device for environment!\n", env_sata);
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return -EIO;
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}
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if (read_env(sata, CONFIG_ENV_SIZE, CONFIG_ENV_OFFSET, buf)) {
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env_set_default(NULL, 0);
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return -EIO;
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}
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return env_import(buf, 1, H_EXTERNAL);
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}
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U_BOOT_ENV_LOCATION(sata) = {
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.location = ENVL_ESATA,
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ENV_NAME("SATA")
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.load = env_sata_load,
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.save = env_save_ptr(env_sata_save),
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};
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