SMCCC: Introduce function to check SMCCC function availability
Currently, 'SMCCC_ARCH_FEATURES' SMC call handler unconditionally
returns 'SMC_OK' for 'SMCCC_ARCH_SOC_ID' function. This seems to
be not correct for the platform which doesn't implement soc-id
functionality i.e. functions to retrieve both soc-version and
soc-revision.
Hence introduced a platform function which will check whether SMCCC
feature is available for the platform.
Also, updated porting guide for the newly added platform function.
Change-Id: I389f0ef6b0837bb24c712aa995b7176117bc7961
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
diff --git a/plat/common/plat_bl_common.c b/plat/common/plat_bl_common.c
index d38fc6f..89b77ba 100644
--- a/plat/common/plat_bl_common.c
+++ b/plat/common/plat_bl_common.c
@@ -11,6 +11,7 @@
#include <common/debug.h>
#include <lib/xlat_tables/xlat_tables_compat.h>
#include <plat/common/platform.h>
+#include <services/arm_arch_svc.h>
#include <smccc_helpers.h>
#include <tools_share/firmware_encrypted.h>
@@ -25,6 +26,7 @@
#pragma weak bl2_plat_handle_post_image_load
#pragma weak plat_try_next_boot_source
#pragma weak plat_get_enc_key_info
+#pragma weak plat_is_smccc_feature_available
#pragma weak plat_get_soc_version
#pragma weak plat_get_soc_revision
@@ -38,6 +40,11 @@
return SMC_ARCH_CALL_NOT_SUPPORTED;
}
+int32_t plat_is_smccc_feature_available(u_register_t fid __unused)
+{
+ return SMC_ARCH_CALL_NOT_SUPPORTED;
+}
+
void bl2_el3_plat_prepare_exit(void)
{
}