[PATCH 1/3] env: Implement lower priority arch_env_get_location()
Marek Vasut
marex at denx.de
Wed Apr 6 02:21:32 CEST 2022
Currently there is only one way to override desired environment location,
by implementing env_get_location(). This is increasingly being conflated
both on board level and architecture level, which leads to a problem on
boards where this function is already implemented on architecture level,
since those boards have no way to override this environment location on
board level anymore.
Implement arch_env_get_location() function which is architecture specific
and should only ever be implemented in architecture code. This function
has lower priority than env_get_location(), which should only ever be
implemented in board code, and which overrides the arch_env_get_location()
architecture environment selection.
This way, architecture can define its default environment chooser, while
board can now override it as needed at all times.
There is no functional change, since env_get_location() simply returns
arch_env_get_location(), and arch_env_get_location() implements the
current env_get_location() default content.
Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Adam Ford <aford173 at gmail.com>
Cc: Fabio Estevam <festevam at denx.de>
Cc: Marek Behún <marek.behun at nic.cz>
Cc: Peng Fan <peng.fan at nxp.com>
Cc: Simon Glass <sjg at chromium.org>
Cc: Stefano Babic <sbabic at denx.de>
Cc: Tim Harvey <tharvey at gateworks.com>
Cc: Tom Rini <trini at konsulko.com>
Cc: Tommaso Merciai <tomm.merciai at gmail.com>
Cc: Vladimir Oltean <vladimir.oltean at nxp.com>
---
env/env.c | 29 ++++++++++++++++++++++++++---
include/env_internal.h | 16 ++++++++++++++++
2 files changed, 42 insertions(+), 3 deletions(-)
diff --git a/env/env.c b/env/env.c
index e4dfb92e154..69848fb0608 100644
--- a/env/env.c
+++ b/env/env.c
@@ -110,13 +110,14 @@ static void env_set_inited(enum env_location location)
}
/**
- * env_get_location() - Returns the best env location for a board
+ * arch_env_get_location() - Returns the best env location for an arch
* @op: operations performed on the environment
* @prio: priority between the multiple environments, 0 being the
* highest priority
*
* This will return the preferred environment for the given priority.
- * This is overridable by boards if they need to.
+ * This is overridable by architectures if they need to and has lower
+ * priority than board side env_get_location() override.
*
* All implementations are free to use the operation, the priority and
* any other data relevant to their choice, but must take into account
@@ -127,7 +128,7 @@ static void env_set_inited(enum env_location location)
* Returns:
* an enum env_location value on success, a negative error code otherwise
*/
-__weak enum env_location env_get_location(enum env_operation op, int prio)
+__weak enum env_location arch_env_get_location(enum env_operation op, int prio)
{
if (prio >= ARRAY_SIZE(env_locations))
return ENVL_UNKNOWN;
@@ -135,6 +136,28 @@ __weak enum env_location env_get_location(enum env_operation op, int prio)
return env_locations[prio];
}
+/**
+ * env_get_location() - Returns the best env location for a board
+ * @op: operations performed on the environment
+ * @prio: priority between the multiple environments, 0 being the
+ * highest priority
+ *
+ * This will return the preferred environment for the given priority.
+ * This is overridable by boards if they need to.
+ *
+ * All implementations are free to use the operation, the priority and
+ * any other data relevant to their choice, but must take into account
+ * the fact that the lowest prority (0) is the most important location
+ * in the system. The following locations should be returned by order
+ * of descending priorities, from the highest to the lowest priority.
+ *
+ * Returns:
+ * an enum env_location value on success, a negative error code otherwise
+ */
+__weak enum env_location env_get_location(enum env_operation op, int prio)
+{
+ return arch_env_get_location(op, prio);
+}
/**
* env_driver_lookup() - Finds the most suited environment location
diff --git a/include/env_internal.h b/include/env_internal.h
index 07c227ecc03..14f4c696785 100644
--- a/include/env_internal.h
+++ b/include/env_internal.h
@@ -234,10 +234,26 @@ const char *env_ext4_get_intf(void);
*/
const char *env_ext4_get_dev_part(void);
+/**
+ * arch_env_get_location()- Provide the best location for the U-Boot environment
+ *
+ * It is a weak function allowing board to overidde the environment location
+ * on architecture level. This has lower priority than env_get_location(),
+ * which can be defined on board level.
+ *
+ * @op: operations performed on the environment
+ * @prio: priority between the multiple environments, 0 being the
+ * highest priority
+ * Return: an enum env_location value on success, or -ve error code.
+ */
+enum env_location arch_env_get_location(enum env_operation op, int prio);
+
/**
* env_get_location()- Provide the best location for the U-Boot environment
*
* It is a weak function allowing board to overidde the environment location
+ * on board level. This has higher priority than arch_env_get_location(),
+ * which can be defined on architecture level.
*
* @op: operations performed on the environment
* @prio: priority between the multiple environments, 0 being the
--
2.35.1
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