linker_lists: Add a function to access a linker list entry
Once declared, you cannot access a linker_list entry since you do not have
a symbol name for it. Add llsym() macro to provide this. This avoids
searching for the symbol at run-time based on name.
An example usage is to declare a driver with U_BOOT_DRIVER(), then obtain
a pointer to that driver later.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Marek Vasut <marex@denx.de>
diff --git a/include/linker_lists.h b/include/linker_lists.h
index 940c871..b22d169 100644
--- a/include/linker_lists.h
+++ b/include/linker_lists.h
@@ -103,6 +103,16 @@
*/
/**
+ * ll_sym() - Access a linker-generated array entry
+ * @_type: Data type of the entry
+ * @_name: Name of the entry
+ * @_list: name of the list. Should contain only characters allowed
+ * in a C variable name!
+ */
+#define llsym(_type, _name, _list) \
+ ((_type *)&_u_boot_list_2_##_list##_2_##_name)
+
+/**
* ll_entry_declare() - Declare linker-generated array entry
* @_type: Data type of the entry
* @_name: Name of the entry