#include <search.h>
#include <errno.h>
+#if defined(CONFIG_ENV_SIZE_REDUND) && \
+ (CONFIG_ENV_SIZE_REDUND != CONFIG_ENV_SIZE)
+#error CONFIG_ENV_SIZE_REDUND should be the same as CONFIG_ENV_SIZE
+#endif
+
char *env_name_spec = "MMC";
#ifdef ENV_IS_EMBEDDED
#define CONFIG_ENV_OFFSET 0
#endif
-static int __mmc_get_env_addr(struct mmc *mmc, u32 *env_addr)
+__weak int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr)
{
*env_addr = CONFIG_ENV_OFFSET;
+#ifdef CONFIG_ENV_OFFSET_REDUND
+ if (copy)
+ *env_addr = CONFIG_ENV_OFFSET_REDUND;
+#endif
return 0;
}
-int mmc_get_env_addr(struct mmc *mmc, u32 *env_addr)
- __attribute__((weak, alias("__mmc_get_env_addr")));
int env_init(void)
{
return -1;
}
+#ifdef CONFIG_SYS_MMC_ENV_PART
+ if (CONFIG_SYS_MMC_ENV_PART != mmc->part_num) {
+ if (mmc_switch_part(CONFIG_SYS_MMC_ENV_DEV,
+ CONFIG_SYS_MMC_ENV_PART)) {
+ puts("MMC partition switch failed\n");
+ return -1;
+ }
+ }
+#endif
+
return 0;
}
+static void fini_mmc_for_env(struct mmc *mmc)
+{
+#ifdef CONFIG_SYS_MMC_ENV_PART
+ if (CONFIG_SYS_MMC_ENV_PART != mmc->part_num)
+ mmc_switch_part(CONFIG_SYS_MMC_ENV_DEV,
+ mmc->part_num);
+#endif
+}
+
#ifdef CONFIG_CMD_SAVEENV
static inline int write_env(struct mmc *mmc, unsigned long size,
unsigned long offset, const void *buffer)
return (n == blk_cnt) ? 0 : -1;
}
+#ifdef CONFIG_ENV_OFFSET_REDUND
+static unsigned char env_flags;
+#endif
+
int saveenv(void)
{
ALLOC_CACHE_ALIGN_BUFFER(env_t, env_new, 1);
char *res;
struct mmc *mmc = find_mmc_device(CONFIG_SYS_MMC_ENV_DEV);
u32 offset;
+ int ret, copy = 0;
- if (init_mmc_for_env(mmc) || mmc_get_env_addr(mmc, &offset))
+ if (init_mmc_for_env(mmc))
return 1;
res = (char *)&env_new->data;
- len = hexport_r(&env_htab, '\0', &res, ENV_SIZE, 0, NULL);
+ len = hexport_r(&env_htab, '\0', 0, &res, ENV_SIZE, 0, NULL);
if (len < 0) {
error("Cannot export environment: errno = %d\n", errno);
- return 1;
+ ret = 1;
+ goto fini;
}
env_new->crc = crc32(0, &env_new->data[0], ENV_SIZE);
- printf("Writing to MMC(%d)... ", CONFIG_SYS_MMC_ENV_DEV);
+
+#ifdef CONFIG_ENV_OFFSET_REDUND
+ env_new->flags = ++env_flags; /* increase the serial */
+
+ if (gd->env_valid == 1)
+ copy = 1;
+#endif
+
+ if (mmc_get_env_addr(mmc, copy, &offset)) {
+ ret = 1;
+ goto fini;
+ }
+
+ printf("Writing to %sMMC(%d)... ", copy ? "redundant " : "",
+ CONFIG_SYS_MMC_ENV_DEV);
if (write_env(mmc, CONFIG_ENV_SIZE, offset, (u_char *)env_new)) {
puts("failed\n");
- return 1;
+ ret = 1;
+ goto fini;
}
puts("done\n");
- return 0;
+ ret = 0;
+
+#ifdef CONFIG_ENV_OFFSET_REDUND
+ gd->env_valid = gd->env_valid == 2 ? 1 : 2;
+#endif
+
+fini:
+ fini_mmc_for_env(mmc);
+ return ret;
}
#endif /* CONFIG_CMD_SAVEENV */
return (n == blk_cnt) ? 0 : -1;
}
+#ifdef CONFIG_ENV_OFFSET_REDUND
+void env_relocate_spec(void)
+{
+#if !defined(ENV_IS_EMBEDDED)
+ struct mmc *mmc = find_mmc_device(CONFIG_SYS_MMC_ENV_DEV);
+ u32 offset1, offset2;
+ int read1_fail = 0, read2_fail = 0;
+ int crc1_ok = 0, crc2_ok = 0;
+ env_t *ep, *tmp_env1, *tmp_env2;
+ int ret;
+
+ tmp_env1 = (env_t *)malloc(CONFIG_ENV_SIZE);
+ tmp_env2 = (env_t *)malloc(CONFIG_ENV_SIZE);
+ if (tmp_env1 == NULL || tmp_env2 == NULL) {
+ puts("Can't allocate buffers for environment\n");
+ ret = 1;
+ goto err;
+ }
+
+ if (init_mmc_for_env(mmc)) {
+ ret = 1;
+ goto err;
+ }
+
+ if (mmc_get_env_addr(mmc, 0, &offset1) ||
+ mmc_get_env_addr(mmc, 1, &offset2)) {
+ ret = 1;
+ goto fini;
+ }
+
+ read1_fail = read_env(mmc, CONFIG_ENV_SIZE, offset1, tmp_env1);
+ read2_fail = read_env(mmc, CONFIG_ENV_SIZE, offset2, tmp_env2);
+
+ if (read1_fail && read2_fail)
+ puts("*** Error - No Valid Environment Area found\n");
+ else if (read1_fail || read2_fail)
+ puts("*** Warning - some problems detected "
+ "reading environment; recovered successfully\n");
+
+ crc1_ok = !read1_fail &&
+ (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
+ crc2_ok = !read2_fail &&
+ (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
+
+ if (!crc1_ok && !crc2_ok) {
+ ret = 1;
+ goto fini;
+ } else if (crc1_ok && !crc2_ok) {
+ gd->env_valid = 1;
+ } else if (!crc1_ok && crc2_ok) {
+ gd->env_valid = 2;
+ } else {
+ /* both ok - check serial */
+ if (tmp_env1->flags == 255 && tmp_env2->flags == 0)
+ gd->env_valid = 2;
+ else if (tmp_env2->flags == 255 && tmp_env1->flags == 0)
+ gd->env_valid = 1;
+ else if (tmp_env1->flags > tmp_env2->flags)
+ gd->env_valid = 1;
+ else if (tmp_env2->flags > tmp_env1->flags)
+ gd->env_valid = 2;
+ else /* flags are equal - almost impossible */
+ gd->env_valid = 1;
+ }
+
+ free(env_ptr);
+
+ if (gd->env_valid == 1)
+ ep = tmp_env1;
+ else
+ ep = tmp_env2;
+
+ env_flags = ep->flags;
+ env_import((char *)ep, 0);
+ ret = 0;
+
+fini:
+ fini_mmc_for_env(mmc);
+err:
+ if (ret)
+ set_default_env(NULL);
+
+ free(tmp_env1);
+ free(tmp_env2);
+#endif
+}
+#else /* ! CONFIG_ENV_OFFSET_REDUND */
void env_relocate_spec(void)
{
#if !defined(ENV_IS_EMBEDDED)
ALLOC_CACHE_ALIGN_BUFFER(char, buf, CONFIG_ENV_SIZE);
struct mmc *mmc = find_mmc_device(CONFIG_SYS_MMC_ENV_DEV);
u32 offset;
+ int ret;
+
+ if (init_mmc_for_env(mmc)) {
+ ret = 1;
+ goto err;
+ }
- if (init_mmc_for_env(mmc) || mmc_get_env_addr(mmc, &offset))
- return set_default_env(NULL);
+ if (mmc_get_env_addr(mmc, 0, &offset)) {
+ ret = 1;
+ goto fini;
+ }
- if (read_env(mmc, CONFIG_ENV_SIZE, offset, buf))
- return set_default_env(NULL);
+ if (read_env(mmc, CONFIG_ENV_SIZE, offset, buf)) {
+ ret = 1;
+ goto fini;
+ }
env_import(buf, 1);
+ ret = 0;
+
+fini:
+ fini_mmc_for_env(mmc);
+err:
+ if (ret)
+ set_default_env(NULL);
#endif
}
+#endif /* CONFIG_ENV_OFFSET_REDUND */
projects / karo-tx-uboot.git / blobdiff