+// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2017 Google, Inc
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
-#include <environment.h>
+#include <env.h>
+#include <env_internal.h>
+#include <log.h>
+#include <asm/global_data.h>
+#include <linux/bitops.h>
+#include <linux/bug.h>
DECLARE_GLOBAL_DATA_PTR;
+#if defined(CONFIG_NEEDS_MANUAL_RELOC)
+void env_fix_drivers(void)
+{
+ struct env_driver *drv;
+ const int n_ents = ll_entry_count(struct env_driver, env_driver);
+ struct env_driver *entry;
+
+ drv = ll_entry_start(struct env_driver, env_driver);
+ for (entry = drv; entry != drv + n_ents; entry++) {
+ if (entry->name)
+ entry->name += gd->reloc_off;
+ if (entry->load)
+ entry->load += gd->reloc_off;
+ if (entry->save)
+ entry->save += gd->reloc_off;
+ if (entry->erase)
+ entry->erase += gd->reloc_off;
+ if (entry->init)
+ entry->init += gd->reloc_off;
+ }
+}
+#endif
+
static struct env_driver *_env_driver_lookup(enum env_location loc)
{
struct env_driver *drv;
#ifdef CONFIG_ENV_IS_IN_REMOTE
ENVL_REMOTE,
#endif
+#ifdef CONFIG_ENV_IS_IN_SATA
+ ENVL_ESATA,
+#endif
#ifdef CONFIG_ENV_IS_IN_SPI_FLASH
ENVL_SPI_FLASH,
#endif
#endif
};
-static enum env_location env_load_location = ENVL_UNKNOWN;
-
static bool env_has_inited(enum env_location location)
{
return gd->env_has_init & BIT(location);
* using the above enum value as the bit index. We need to
* make sure that we're not overflowing it.
*/
- BUILD_BUG_ON(ARRAY_SIZE(env_locations) > BITS_PER_LONG);
+ BUILD_BUG_ON(ENVL_COUNT > BITS_PER_LONG);
gd->env_has_init |= BIT(location);
}
*/
__weak enum env_location env_get_location(enum env_operation op, int prio)
{
- switch (op) {
- case ENVOP_GET_CHAR:
- case ENVOP_INIT:
- case ENVOP_LOAD:
- if (prio >= ARRAY_SIZE(env_locations))
- return ENVL_UNKNOWN;
-
- env_load_location = env_locations[prio];
- return env_load_location;
-
- case ENVOP_SAVE:
- return env_load_location;
- }
+ if (prio >= ARRAY_SIZE(env_locations))
+ return ENVL_UNKNOWN;
- return ENVL_UNKNOWN;
+ return env_locations[prio];
}
return drv;
}
-int env_get_char(int index)
+int env_load(void)
{
struct env_driver *drv;
+ int best_prio = -1;
int prio;
- if (gd->env_valid == ENV_INVALID)
- return default_environment[index];
-
- for (prio = 0; (drv = env_driver_lookup(ENVOP_GET_CHAR, prio)); prio++) {
+ for (prio = 0; (drv = env_driver_lookup(ENVOP_LOAD, prio)); prio++) {
int ret;
- if (!drv->get_char)
- continue;
-
if (!env_has_inited(drv->location))
continue;
- ret = drv->get_char(index);
- if (!ret)
- return 0;
+ printf("Loading Environment from %s... ", drv->name);
+ /*
+ * In error case, the error message must be printed during
+ * drv->load() in some underlying API, and it must be exactly
+ * one message.
+ */
+ ret = drv->load();
+ if (!ret) {
+ printf("OK\n");
+ gd->env_load_prio = prio;
- debug("%s: Environment %s failed to load (err=%d)\n", __func__,
- drv->name, ret);
+#if !CONFIG_IS_ENABLED(ENV_APPEND)
+ return 0;
+#endif
+ } else if (ret == -ENOMSG) {
+ /* Handle "bad CRC" case */
+ if (best_prio == -1)
+ best_prio = prio;
+ } else {
+ debug("Failed (%d)\n", ret);
+ }
}
+ /*
+ * In case of invalid environment, we set the 'default' env location
+ * to the best choice, i.e.:
+ * 1. Environment location with bad CRC, if such location was found
+ * 2. Otherwise use the location with highest priority
+ *
+ * This way, next calls to env_save() will restore the environment
+ * at the right place.
+ */
+ if (best_prio >= 0)
+ debug("Selecting environment with bad CRC\n");
+ else
+ best_prio = 0;
+
+ gd->env_load_prio = best_prio;
+
return -ENODEV;
}
-int env_load(void)
+int env_reload(void)
{
struct env_driver *drv;
- int prio;
- for (prio = 0; (drv = env_driver_lookup(ENVOP_LOAD, prio)); prio++) {
+ drv = env_driver_lookup(ENVOP_LOAD, gd->env_load_prio);
+ if (drv) {
int ret;
- if (!drv->load)
- continue;
+ printf("Loading Environment from %s... ", drv->name);
- if (!env_has_inited(drv->location))
- continue;
+ if (!env_has_inited(drv->location)) {
+ printf("not initialized\n");
+ return -ENODEV;
+ }
- printf("Loading Environment from %s... ", drv->name);
ret = drv->load();
if (ret)
printf("Failed (%d)\n", ret);
int env_save(void)
{
struct env_driver *drv;
- int prio;
- for (prio = 0; (drv = env_driver_lookup(ENVOP_SAVE, prio)); prio++) {
+ drv = env_driver_lookup(ENVOP_SAVE, gd->env_load_prio);
+ if (drv) {
int ret;
- if (!drv->save)
- continue;
+ printf("Saving Environment to %s... ", drv->name);
+ if (!drv->save) {
+ printf("not possible\n");
+ return -ENODEV;
+ }
- if (!env_has_inited(drv->location))
- continue;
+ if (!env_has_inited(drv->location)) {
+ printf("not initialized\n");
+ return -ENODEV;
+ }
- printf("Saving Environment to %s... ", drv->name);
ret = drv->save();
if (ret)
printf("Failed (%d)\n", ret);
return -ENODEV;
}
+int env_erase(void)
+{
+ struct env_driver *drv;
+
+ drv = env_driver_lookup(ENVOP_ERASE, gd->env_load_prio);
+ if (drv) {
+ int ret;
+
+ if (!drv->erase)
+ return -ENODEV;
+
+ if (!env_has_inited(drv->location))
+ return -ENODEV;
+
+ printf("Erasing Environment on %s... ", drv->name);
+ ret = drv->erase();
+ if (ret)
+ printf("Failed (%d)\n", ret);
+ else
+ printf("OK\n");
+
+ if (!ret)
+ return 0;
+ }
+
+ return -ENODEV;
+}
+
int env_init(void)
{
struct env_driver *drv;
for (prio = 0; (drv = env_driver_lookup(ENVOP_INIT, prio)); prio++) {
if (!drv->init || !(ret = drv->init()))
env_set_inited(drv->location);
+ if (ret == -ENOENT)
+ env_set_inited(drv->location);
debug("%s: Environment %s init done (ret=%d)\n", __func__,
drv->name, ret);
+
+ if (gd->env_valid == ENV_INVALID)
+ ret = -ENOENT;
}
if (!prio)
return ret;
}
+
+int env_select(const char *name)
+{
+ struct env_driver *drv;
+ const int n_ents = ll_entry_count(struct env_driver, env_driver);
+ struct env_driver *entry;
+ int prio;
+ bool found = false;
+
+ printf("Select Environment on %s: ", name);
+
+ /* search ENV driver by name */
+ drv = ll_entry_start(struct env_driver, env_driver);
+ for (entry = drv; entry != drv + n_ents; entry++) {
+ if (!strcmp(entry->name, name)) {
+ found = true;
+ break;
+ }
+ }
+
+ if (!found) {
+ printf("driver not found\n");
+ return -ENODEV;
+ }
+
+ /* search priority by driver */
+ for (prio = 0; (drv = env_driver_lookup(ENVOP_INIT, prio)); prio++) {
+ if (entry->location == env_get_location(ENVOP_LOAD, prio)) {
+ /* when priority change, reset the ENV flags */
+ if (gd->env_load_prio != prio) {
+ gd->env_load_prio = prio;
+ gd->env_valid = ENV_INVALID;
+ gd->flags &= ~GD_FLG_ENV_DEFAULT;
+ }
+ printf("OK\n");
+ return 0;
+ }
+ }
+ printf("priority not found\n");
+
+ return -ENODEV;
+}
projects / J-u-boot.git / blobdiff