cmd: env: add env select command
Add the new command 'env select' to force the persistent storage
of environment, saved in gd->env_load_prio.
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 498fd31..d7136b0 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -610,6 +610,11 @@
Load all environment variables from the compiled-in persistent
storage.
+config CMD_NVEDIT_SELECT
+ bool "env select"
+ help
+ Select the compiled-in persistent storage of environment variables.
+
endmenu
menu "Memory commands"
diff --git a/cmd/nvedit.c b/cmd/nvedit.c
index f730e2e..d188c6a 100644
--- a/cmd/nvedit.c
+++ b/cmd/nvedit.c
@@ -802,6 +802,15 @@
return env_reload() ? 1 : 0;
}
#endif
+
+#if defined(CONFIG_CMD_NVEDIT_SELECT)
+static int do_env_select(struct cmd_tbl *cmdtp, int flag, int argc,
+ char *const argv[])
+{
+ return env_select(argv[1]) ? 1 : 0;
+}
+#endif
+
#endif /* CONFIG_SPL_BUILD */
int env_match(uchar *s1, int i2)
@@ -1368,6 +1377,9 @@
U_BOOT_CMD_MKENT(erase, 1, 0, do_env_erase, "", ""),
#endif
#endif
+#if defined(CONFIG_CMD_NVEDIT_SELECT)
+ U_BOOT_CMD_MKENT(select, 2, 0, do_env_select, "", ""),
+#endif
U_BOOT_CMD_MKENT(set, CONFIG_SYS_MAXARGS, 0, do_env_set, "", ""),
#if defined(CONFIG_CMD_ENV_EXISTS)
U_BOOT_CMD_MKENT(exists, 2, 0, do_env_exists, "", ""),
@@ -1456,6 +1468,9 @@
#if defined(CONFIG_CMD_NVEDIT_LOAD)
"env load - load environment\n"
#endif
+#if defined(CONFIG_CMD_NVEDIT_SELECT)
+ "env select [target] - select environment target\n"
+#endif
#if defined(CONFIG_CMD_NVEDIT_EFI)
"env set -e [-nv][-bs][-rt][-at][-a][-i addr,size][-v] name [arg ...]\n"
" - set UEFI variable; unset if '-i' or 'arg' not specified\n"
diff --git a/env/env.c b/env/env.c
index 785a2b8..2af2fae 100644
--- a/env/env.c
+++ b/env/env.c
@@ -344,3 +344,45 @@
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;
+}
diff --git a/include/env.h b/include/env.h
index 68e0f4f..665857f 100644
--- a/include/env.h
+++ b/include/env.h
@@ -287,6 +287,13 @@
int env_erase(void);
/**
+ * env_select() - Select the environment storage
+ *
+ * @return 0 if OK, -ve on error
+ */
+int env_select(const char *name);
+
+/**
* env_import() - Import from a binary representation into hash table
*
* This imports the environment from a buffer. The format for each variable is
@@ -349,5 +356,4 @@
* This is used for those unfortunate archs with crappy toolchains
*/
void env_reloc(void);
-
#endif