--- /dev/null
+/*
+ * (C) Copyright 2000-2010
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Andreas Heppel <aheppel@sysgo.de>
+
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/* #define DEBUG */
+
+#include <common.h>
+#include <command.h>
+#include <environment.h>
+#include <linux/stddef.h>
+#include <malloc.h>
+#include <search.h>
+#include <errno.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH)
+#define CMD_SAVEENV
+#elif defined(CONFIG_ENV_ADDR_REDUND)
+#error CONFIG_ENV_ADDR_REDUND must have CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH
+#endif
+
+#if defined(CONFIG_ENV_SIZE_REDUND) && \
+ (CONFIG_ENV_SIZE_REDUND < CONFIG_ENV_SIZE)
+#error CONFIG_ENV_SIZE_REDUND should not be less then CONFIG_ENV_SIZE
+#endif
+
+char *env_name_spec = "Flash";
+
+#ifdef ENV_IS_EMBEDDED
+env_t *env_ptr = &environment;
+
+static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;
+
+#else /* ! ENV_IS_EMBEDDED */
+
+env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR;
+static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR;
+#endif /* ENV_IS_EMBEDDED */
+
+#if defined(CMD_SAVEENV) || defined(CONFIG_ENV_ADDR_REDUND)
+/* CONFIG_ENV_ADDR is supposed to be on sector boundary */
+static ulong end_addr = CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1;
+#endif
+
+#ifdef CONFIG_ENV_ADDR_REDUND
+static env_t *flash_addr_new = (env_t *)CONFIG_ENV_ADDR_REDUND;
+
+/* CONFIG_ENV_ADDR_REDUND is supposed to be on sector boundary */
+static ulong end_addr_new = CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1;
+#endif /* CONFIG_ENV_ADDR_REDUND */
+
+
+#ifdef CONFIG_ENV_ADDR_REDUND
+int env_init(void)
+{
+ int crc1_ok = 0, crc2_ok = 0;
+
+ uchar flag1 = flash_addr->flags;
+ uchar flag2 = flash_addr_new->flags;
+
+ ulong addr_default = (ulong)&default_environment[0];
+ ulong addr1 = (ulong)&(flash_addr->data);
+ ulong addr2 = (ulong)&(flash_addr_new->data);
+
+ crc1_ok = crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc;
+ crc2_ok =
+ crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc;
+
+ if (crc1_ok && !crc2_ok) {
+ gd->env_addr = addr1;
+ gd->env_valid = 1;
+ } else if (!crc1_ok && crc2_ok) {
+ gd->env_addr = addr2;
+ gd->env_valid = 1;
+ } else if (!crc1_ok && !crc2_ok) {
+ gd->env_addr = addr_default;
+ gd->env_valid = 0;
+ } else if (flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG) {
+ gd->env_addr = addr1;
+ gd->env_valid = 1;
+ } else if (flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG) {
+ gd->env_addr = addr2;
+ gd->env_valid = 1;
+ } else if (flag1 == flag2) {
+ gd->env_addr = addr1;
+ gd->env_valid = 2;
+ } else if (flag1 == 0xFF) {
+ gd->env_addr = addr1;
+ gd->env_valid = 2;
+ } else if (flag2 == 0xFF) {
+ gd->env_addr = addr2;
+ gd->env_valid = 2;
+ }
+
+ return 0;
+}
+
+#ifdef CMD_SAVEENV
+int saveenv(void)
+{
+ env_t env_new;
+ char *saved_data = NULL;
+ char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG;
+ int rc = 1;
+#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
+ ulong up_data = 0;
+#endif
+
+ debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
+
+ if (flash_sect_protect(0, (ulong)flash_addr, end_addr))
+ goto done;
+
+ debug("Protect off %08lX ... %08lX\n",
+ (ulong)flash_addr_new, end_addr_new);
+
+ if (flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new))
+ goto done;
+
+ rc = env_export(&env_new);
+ if (rc)
+ return rc;
+ env_new.flags = new_flag;
+
+#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
+ up_data = end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE);
+ debug("Data to save 0x%lX\n", up_data);
+ if (up_data) {
+ saved_data = malloc(up_data);
+ if (saved_data == NULL) {
+ printf("Unable to save the rest of sector (%ld)\n",
+ up_data);
+ goto done;
+ }
+ memcpy(saved_data,
+ (void *)((long)flash_addr_new + CONFIG_ENV_SIZE),
+ up_data);
+ debug("Data (start 0x%lX, len 0x%lX) saved at 0x%p\n",
+ (long)flash_addr_new + CONFIG_ENV_SIZE,
+ up_data, saved_data);
+ }
+#endif
+ puts("Erasing Flash...");
+ debug(" %08lX ... %08lX ...", (ulong)flash_addr_new, end_addr_new);
+
+ if (flash_sect_erase((ulong)flash_addr_new, end_addr_new))
+ goto done;
+
+ puts("Writing to Flash... ");
+ debug(" %08lX ... %08lX ...",
+ (ulong)&(flash_addr_new->data),
+ sizeof(env_ptr->data) + (ulong)&(flash_addr_new->data));
+ rc = flash_write((char *)&env_new, (ulong)flash_addr_new,
+ sizeof(env_new));
+ if (rc)
+ goto perror;
+
+ rc = flash_write(&flag, (ulong)&(flash_addr->flags),
+ sizeof(flash_addr->flags));
+ if (rc)
+ goto perror;
+
+#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
+ if (up_data) { /* restore the rest of sector */
+ debug("Restoring the rest of data to 0x%lX len 0x%lX\n",
+ (long)flash_addr_new + CONFIG_ENV_SIZE, up_data);
+ if (flash_write(saved_data,
+ (long)flash_addr_new + CONFIG_ENV_SIZE,
+ up_data))
+ goto perror;
+ }
+#endif
+ puts("done\n");
+
+ {
+ env_t *etmp = flash_addr;
+ ulong ltmp = end_addr;
+
+ flash_addr = flash_addr_new;
+ flash_addr_new = etmp;
+
+ end_addr = end_addr_new;
+ end_addr_new = ltmp;
+ }
+
+ rc = 0;
+ goto done;
+perror:
+ flash_perror(rc);
+done:
+ if (saved_data)
+ free(saved_data);
+ /* try to re-protect */
+ flash_sect_protect(1, (ulong)flash_addr, end_addr);
+ flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
+
+ return rc;
+}
+#endif /* CMD_SAVEENV */
+
+#else /* ! CONFIG_ENV_ADDR_REDUND */
+
+int env_init(void)
+{
+ if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) {
+ gd->env_addr = (ulong)&(env_ptr->data);
+ gd->env_valid = 1;
+ return 0;
+ }
+
+ gd->env_addr = (ulong)&default_environment[0];
+ gd->env_valid = 0;
+ return 0;
+}
+
+#ifdef CMD_SAVEENV
+int saveenv(void)
+{
+ env_t env_new;
+ int rc = 1;
+ char *saved_data = NULL;
+#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
+ ulong up_data = 0;
+
+ up_data = end_addr + 1 - ((long)flash_addr + CONFIG_ENV_SIZE);
+ debug("Data to save 0x%lx\n", up_data);
+ if (up_data) {
+ saved_data = malloc(up_data);
+ if (saved_data == NULL) {
+ printf("Unable to save the rest of sector (%ld)\n",
+ up_data);
+ goto done;
+ }
+ memcpy(saved_data,
+ (void *)((long)flash_addr + CONFIG_ENV_SIZE), up_data);
+ debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n",
+ (ulong)flash_addr + CONFIG_ENV_SIZE,
+ up_data,
+ (ulong)saved_data);
+ }
+#endif /* CONFIG_ENV_SECT_SIZE */
+
+ debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr);
+
+ if (flash_sect_protect(0, (long)flash_addr, end_addr))
+ goto done;
+
+ rc = env_export(&env_new);
+ if (rc)
+ goto done;
+
+ puts("Erasing Flash...");
+ if (flash_sect_erase((long)flash_addr, end_addr))
+ goto done;
+
+ puts("Writing to Flash... ");
+ rc = flash_write((char *)&env_new, (long)flash_addr, CONFIG_ENV_SIZE);
+ if (rc != 0)
+ goto perror;
+
+#if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE
+ if (up_data) { /* restore the rest of sector */
+ debug("Restoring the rest of data to 0x%lx len 0x%lx\n",
+ (ulong)flash_addr + CONFIG_ENV_SIZE, up_data);
+ if (flash_write(saved_data,
+ (long)flash_addr + CONFIG_ENV_SIZE,
+ up_data))
+ goto perror;
+ }
+#endif
+ puts("done\n");
+ rc = 0;
+ goto done;
+perror:
+ flash_perror(rc);
+done:
+ if (saved_data)
+ free(saved_data);
+ /* try to re-protect */
+ flash_sect_protect(1, (long)flash_addr, end_addr);
+ return rc;
+}
+#endif /* CMD_SAVEENV */
+
+#endif /* CONFIG_ENV_ADDR_REDUND */
+
+void env_relocate_spec(void)
+{
+#ifdef CONFIG_ENV_ADDR_REDUND
+ if (gd->env_addr != (ulong)&(flash_addr->data)) {
+ env_t *etmp = flash_addr;
+ ulong ltmp = end_addr;
+
+ flash_addr = flash_addr_new;
+ flash_addr_new = etmp;
+
+ end_addr = end_addr_new;
+ end_addr_new = ltmp;
+ }
+
+ if (flash_addr_new->flags != OBSOLETE_FLAG &&
+ crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc) {
+ char flag = OBSOLETE_FLAG;
+
+ gd->env_valid = 2;
+ flash_sect_protect(0, (ulong)flash_addr_new, end_addr_new);
+ flash_write(&flag,
+ (ulong)&(flash_addr_new->flags),
+ sizeof(flash_addr_new->flags));
+ flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new);
+ }
+
+ if (flash_addr->flags != ACTIVE_FLAG &&
+ (flash_addr->flags & ACTIVE_FLAG) == ACTIVE_FLAG) {
+ char flag = ACTIVE_FLAG;
+
+ gd->env_valid = 2;
+ flash_sect_protect(0, (ulong)flash_addr, end_addr);
+ flash_write(&flag,
+ (ulong)&(flash_addr->flags),
+ sizeof(flash_addr->flags));
+ flash_sect_protect(1, (ulong)flash_addr, end_addr);
+ }
+
+ if (gd->env_valid == 2)
+ puts("*** Warning - some problems detected "
+ "reading environment; recovered successfully\n\n");
+#endif /* CONFIG_ENV_ADDR_REDUND */
+
+ env_import((char *)flash_addr, 1);
+}
Code Review / kvmfornfv.git / blobdiff