commit f809c6e72611e80b8b3a97c073e2e09c3ec9456d
author Manish V Badarkhe <Manish.Badarkhe@arm.com> Sat Feb 22 08:43:00 2020 +0000
committer Manish V Badarkhe <Manish.Badarkhe@arm.com> Tue Mar 17 10:14:35 2020 +0000
tree 5fb7659f153f6305f355b7abc702abdf7160ee85
parent 38a4c87f60dc6b15c4d64fe110fedf7bdadf6244

Implement SMCCC_ARCH_SOC_ID SMC call

Implemented SMCCC_ARCH_SOC_ID call in order to get below
SOC information:

1. SOC revision
2. SOC version

Implementation done using below SMCCC specification document:
https://developer.arm.com/docs/den0028/c

Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
Change-Id: Ie0595f1c345a6429a6fb4a7f05534a0ca9c9a48b

plat/arm/common/arm_common.c

diff --git a/plat/arm/common/arm_common.c b/plat/arm/common/arm_common.c
index d1eee08..60c777e 100644
--- a/plat/arm/common/arm_common.c
+++ b/plat/arm/common/arm_common.c
@@ -25,6 +25,9 @@
  * conflicts with the definition in plat/common. */
 #pragma weak plat_get_syscnt_freq2
 
+/* Get ARM SOC-ID */
+#pragma weak plat_arm_get_soc_id
+
 /*******************************************************************************
  * Changes the memory attributes for the region of mapped memory where the BL
  * image's translation tables are located such that the tables will have
@@ -231,3 +234,22 @@
 	return arm_validate_ns_entrypoint(pa);
 }
 #endif
+
+/*
+ * Weak function to get ARM platform SOC-ID, Always return SOC-ID=0
+ * ToDo: Get proper SOC-ID for every ARM platform and define this
+ *       function separately for every ARM platform.
+ */
+uint32_t plat_arm_get_soc_id(void)
+{
+	return 0U;
+}
+
+/* Get SOC version */
+int32_t plat_get_soc_version(void)
+{
+	return (int32_t)
+		((ARM_SOC_IDENTIFICATION_CODE << ARM_SOC_IDENTIFICATION_SHIFT)
+		 | (ARM_SOC_CONTINUATION_CODE << ARM_SOC_CONTINUATION_SHIFT)
+		 | plat_arm_get_soc_id());
+}

plat/common/plat_bl_common.c

diff --git a/plat/common/plat_bl_common.c b/plat/common/plat_bl_common.c
index de6c1d1..d38fc6f 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 <smccc_helpers.h>
 #include <tools_share/firmware_encrypted.h>
 
 /*
@@ -24,6 +25,18 @@
 #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_get_soc_version
+#pragma weak plat_get_soc_revision
+
+int32_t plat_get_soc_version(void)
+{
+	return SMC_ARCH_CALL_NOT_SUPPORTED;
+}
+
+int32_t plat_get_soc_revision(void)
+{
+	return SMC_ARCH_CALL_NOT_SUPPORTED;
+}
 
 void bl2_el3_plat_prepare_exit(void)
 {