mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-16 23:18:51 +09:00
![Tom Rini](/assets/img/avatar_default.png)
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>
370 lines
9.0 KiB
C
370 lines
9.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2000-2010
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Andreas Heppel <aheppel@sysgo.de>
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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 <environment.h>
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#include <linux/stddef.h>
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#include <malloc.h>
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#include <search.h>
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#include <errno.h>
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DECLARE_GLOBAL_DATA_PTR;
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#ifndef CONFIG_SPL_BUILD
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# if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH)
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# define CMD_SAVEENV
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# elif defined(CONFIG_ENV_ADDR_REDUND)
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# error CONFIG_ENV_ADDR_REDUND must have CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH
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# endif
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#endif
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#if defined(CONFIG_ENV_SIZE_REDUND) && \
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(CONFIG_ENV_SIZE_REDUND < CONFIG_ENV_SIZE)
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#error CONFIG_ENV_SIZE_REDUND should not be less then CONFIG_ENV_SIZE
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#endif
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/* TODO(sjg@chromium.org): Figure out all these special cases */
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#if (!defined(CONFIG_MICROBLAZE) && !defined(CONFIG_ARCH_ZYNQ) && \
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!defined(CONFIG_TARGET_MCCMON6) && !defined(CONFIG_TARGET_X600) && \
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!defined(CONFIG_TARGET_EDMINIV2)) || \
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!defined(CONFIG_SPL_BUILD)
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#define LOADENV
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#endif
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#if !defined(CONFIG_TARGET_X600) || !defined(CONFIG_SPL_BUILD)
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#define INITENV
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#endif
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#ifdef ENV_IS_EMBEDDED
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env_t *env_ptr = &environment;
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static __maybe_unused env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;
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#else /* ! ENV_IS_EMBEDDED */
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env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;
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static __maybe_unused env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;
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#endif /* ENV_IS_EMBEDDED */
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/* CONFIG_ENV_ADDR is supposed to be on sector boundary */
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static ulong __maybe_unused end_addr =
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CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1;
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#ifdef CONFIG_ENV_ADDR_REDUND
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static env_t __maybe_unused *flash_addr_new = (env_t *)CONFIG_ENV_ADDR_REDUND;
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/* CONFIG_ENV_ADDR_REDUND is supposed to be on sector boundary */
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static ulong __maybe_unused end_addr_new =
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CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;
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#endif /* CONFIG_ENV_ADDR_REDUND */
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#ifdef CONFIG_ENV_ADDR_REDUND
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#ifdef INITENV
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static int env_flash_init(void)
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{
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int crc1_ok = 0, crc2_ok = 0;
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uchar flag1 = flash_addr->flags;
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uchar flag2 = flash_addr_new->flags;
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ulong addr_default = (ulong)&default_environment[0];
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ulong addr1 = (ulong)&(flash_addr->data);
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ulong addr2 = (ulong)&(flash_addr_new->data);
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crc1_ok = crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc;
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crc2_ok =
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crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc;
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if (crc1_ok && !crc2_ok) {
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gd->env_addr = addr1;
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gd->env_valid = ENV_VALID;
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} else if (!crc1_ok && crc2_ok) {
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gd->env_addr = addr2;
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gd->env_valid = ENV_VALID;
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} else if (!crc1_ok && !crc2_ok) {
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gd->env_addr = addr_default;
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gd->env_valid = ENV_INVALID;
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} else if (flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG) {
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gd->env_addr = addr1;
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gd->env_valid = ENV_VALID;
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} else if (flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG) {
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gd->env_addr = addr2;
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gd->env_valid = ENV_VALID;
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} else if (flag1 == flag2) {
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gd->env_addr = addr1;
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gd->env_valid = ENV_REDUND;
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} else if (flag1 == 0xFF) {
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gd->env_addr = addr1;
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gd->env_valid = ENV_REDUND;
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} else if (flag2 == 0xFF) {
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gd->env_addr = addr2;
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gd->env_valid = ENV_REDUND;
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}
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return 0;
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}
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#endif
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#ifdef CMD_SAVEENV
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static int env_flash_save(void)
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{
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env_t env_new;
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char *saved_data = NULL;
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char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
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int rc = 1;
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#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
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ulong up_data = 0;
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#endif
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debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
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if (flash_sect_protect(0, (ulong)flash_addr, end_addr))
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goto done;
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debug("Protect off %08lX ... %08lX\n",
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(ulong)flash_addr_new, end_addr_new);
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if (flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new))
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goto done;
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rc = env_export(&env_new);
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if (rc)
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return rc;
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env_new.flags = new_flag;
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#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
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up_data = end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE);
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debug("Data to save 0x%lX\n", up_data);
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if (up_data) {
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saved_data = malloc(up_data);
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if (saved_data == NULL) {
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printf("Unable to save the rest of sector (%ld)\n",
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up_data);
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goto done;
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}
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memcpy(saved_data,
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(void *)((long)flash_addr_new + CONFIG_ENV_SIZE),
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up_data);
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debug("Data (start 0x%lX, len 0x%lX) saved at 0x%p\n",
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(long)flash_addr_new + CONFIG_ENV_SIZE,
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up_data, saved_data);
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}
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#endif
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puts("Erasing Flash...");
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debug(" %08lX ... %08lX ...", (ulong)flash_addr_new, end_addr_new);
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if (flash_sect_erase((ulong)flash_addr_new, end_addr_new))
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goto done;
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puts("Writing to Flash... ");
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debug(" %08lX ... %08lX ...",
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(ulong)&(flash_addr_new->data),
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sizeof(env_ptr->data) + (ulong)&(flash_addr_new->data));
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rc = flash_write((char *)&env_new, (ulong)flash_addr_new,
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sizeof(env_new));
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if (rc)
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goto perror;
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rc = flash_write(&flag, (ulong)&(flash_addr->flags),
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sizeof(flash_addr->flags));
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if (rc)
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goto perror;
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#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
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if (up_data) { /* restore the rest of sector */
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debug("Restoring the rest of data to 0x%lX len 0x%lX\n",
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(long)flash_addr_new + CONFIG_ENV_SIZE, up_data);
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if (flash_write(saved_data,
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(long)flash_addr_new + CONFIG_ENV_SIZE,
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up_data))
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goto perror;
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}
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#endif
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puts("done\n");
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{
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env_t *etmp = flash_addr;
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ulong ltmp = end_addr;
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flash_addr = flash_addr_new;
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flash_addr_new = etmp;
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end_addr = end_addr_new;
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end_addr_new = ltmp;
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}
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rc = 0;
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goto done;
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perror:
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flash_perror(rc);
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done:
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if (saved_data)
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free(saved_data);
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/* try to re-protect */
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flash_sect_protect(1, (ulong)flash_addr, end_addr);
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flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
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return rc;
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}
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#endif /* CMD_SAVEENV */
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#else /* ! CONFIG_ENV_ADDR_REDUND */
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#ifdef INITENV
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static int env_flash_init(void)
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{
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if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
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gd->env_addr = (ulong)&(env_ptr->data);
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gd->env_valid = ENV_VALID;
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return 0;
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}
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gd->env_addr = (ulong)&default_environment[0];
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gd->env_valid = ENV_INVALID;
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return 0;
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}
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#endif
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#ifdef CMD_SAVEENV
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static int env_flash_save(void)
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{
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env_t env_new;
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int rc = 1;
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char *saved_data = NULL;
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#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
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ulong up_data = 0;
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up_data = end_addr + 1 - ((long)flash_addr + CONFIG_ENV_SIZE);
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debug("Data to save 0x%lx\n", up_data);
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if (up_data) {
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saved_data = malloc(up_data);
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if (saved_data == NULL) {
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printf("Unable to save the rest of sector (%ld)\n",
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up_data);
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goto done;
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}
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memcpy(saved_data,
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(void *)((long)flash_addr + CONFIG_ENV_SIZE), up_data);
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debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n",
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(ulong)flash_addr + CONFIG_ENV_SIZE,
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up_data,
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(ulong)saved_data);
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}
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#endif /* CONFIG_ENV_SECT_SIZE */
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debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
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if (flash_sect_protect(0, (long)flash_addr, end_addr))
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goto done;
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rc = env_export(&env_new);
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if (rc)
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goto done;
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puts("Erasing Flash...");
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if (flash_sect_erase((long)flash_addr, end_addr))
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goto done;
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puts("Writing to Flash... ");
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rc = flash_write((char *)&env_new, (long)flash_addr, CONFIG_ENV_SIZE);
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if (rc != 0)
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goto perror;
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#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
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if (up_data) { /* restore the rest of sector */
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debug("Restoring the rest of data to 0x%lx len 0x%lx\n",
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(ulong)flash_addr + CONFIG_ENV_SIZE, up_data);
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if (flash_write(saved_data,
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(long)flash_addr + CONFIG_ENV_SIZE,
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up_data))
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goto perror;
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}
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#endif
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puts("done\n");
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rc = 0;
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goto done;
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perror:
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flash_perror(rc);
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done:
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if (saved_data)
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free(saved_data);
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/* try to re-protect */
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flash_sect_protect(1, (long)flash_addr, end_addr);
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return rc;
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}
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#endif /* CMD_SAVEENV */
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#endif /* CONFIG_ENV_ADDR_REDUND */
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#ifdef LOADENV
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static int env_flash_load(void)
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{
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#ifdef CONFIG_ENV_ADDR_REDUND
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if (gd->env_addr != (ulong)&(flash_addr->data)) {
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env_t *etmp = flash_addr;
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ulong ltmp = end_addr;
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flash_addr = flash_addr_new;
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flash_addr_new = etmp;
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end_addr = end_addr_new;
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end_addr_new = ltmp;
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}
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if (flash_addr_new->flags != OBSOLETE_FLAG &&
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crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc) {
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char flag = OBSOLETE_FLAG;
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gd->env_valid = ENV_REDUND;
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flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new);
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flash_write(&flag,
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(ulong)&(flash_addr_new->flags),
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sizeof(flash_addr_new->flags));
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flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
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}
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if (flash_addr->flags != ACTIVE_FLAG &&
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(flash_addr->flags & ACTIVE_FLAG) == ACTIVE_FLAG) {
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char flag = ACTIVE_FLAG;
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gd->env_valid = ENV_REDUND;
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flash_sect_protect(0, (ulong)flash_addr, end_addr);
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flash_write(&flag,
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(ulong)&(flash_addr->flags),
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sizeof(flash_addr->flags));
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flash_sect_protect(1, (ulong)flash_addr, end_addr);
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}
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if (gd->env_valid == ENV_REDUND)
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puts("*** Warning - some problems detected "
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"reading environment; recovered successfully\n\n");
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#endif /* CONFIG_ENV_ADDR_REDUND */
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return env_import((char *)flash_addr, 1);
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}
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#endif /* LOADENV */
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U_BOOT_ENV_LOCATION(flash) = {
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.location = ENVL_FLASH,
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ENV_NAME("Flash")
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#ifdef LOADENV
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.load = env_flash_load,
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#endif
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#ifdef CMD_SAVEENV
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.save = env_save_ptr(env_flash_save),
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#endif
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#ifdef INITENV
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.init = env_flash_init,
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#endif
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};
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