acpi: add STA function to return external variable
This change adds support function to add STA function which returns an
external variable.
Change-Id: I31755a76ee985ee6059289ae194537d531270761
Signed-off-by: Sugnan Prabhu S <sugnan.prabhu.s@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42245
Reviewed-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/acpi/acpigen.c b/src/acpi/acpigen.c
index fc6da1b..bf1b373 100644
--- a/src/acpi/acpigen.c
+++ b/src/acpi/acpigen.c
@@ -742,6 +742,17 @@
acpigen_pop_len();
}
+void acpigen_write_STA_ext(const char *namestring)
+{
+ /*
+ * Method (_STA, 0, NotSerialized) { Return (ext_val) }
+ */
+ acpigen_write_method("_STA", 0);
+ acpigen_emit_byte(RETURN_OP);
+ acpigen_emit_namestring(namestring);
+ acpigen_pop_len();
+}
+
/*
* Generates a func with max supported P-states.
*/