binman: Add binman symbol support to SPL
Allow SPL to access binman symbols and use this to get the address of
U-Boot. This falls back to CONFIG_SYS_TEXT_BASE if the binman symbol
is not available.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/binman_sym.h b/include/binman_sym.h
index 3999b26..87d03d5 100644
--- a/include/binman_sym.h
+++ b/include/binman_sym.h
@@ -38,6 +38,17 @@
__attribute__((aligned(4), unused, section(".binman_sym")))
/**
+ * binman_sym_extern() - Declare a extern symbol that will be used at run-time
+ *
+ * @_type: Type f the symbol (e.g. unsigned long)
+ * @entry_name: Name of the entry to look for (e.g. 'u_boot_spl')
+ * @_prop_name: Property value to get from that entry (e.g. 'pos')
+ */
+#define binman_sym_extern(_type, _entry_name, _prop_name) \
+ extern _type binman_symname(_entry_name, _prop_name) \
+ __attribute__((aligned(4), unused, section(".binman_sym")))
+
+/**
* binman_sym_declare_optional() - Declare an optional symbol
*
* If this symbol cannot be provided by binman, an error will not be generated.
@@ -73,6 +84,8 @@
#define binman_sym_declare_optional(_type, _entry_name, _prop_name)
+#define binman_sym_extern(_type, _entry_name, _prop_name)
+
#define binman_sym(_type, _entry_name, _prop_name) BINMAN_SYM_MISSING
#endif /* BINMAN */