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
diff --git a/docs/getting_started/porting-guide.rst b/docs/getting_started/porting-guide.rst
index d634d2e..d6572f5 100644
--- a/docs/getting_started/porting-guide.rst
+++ b/docs/getting_started/porting-guide.rst
@@ -1116,6 +1116,35 @@
the log output. The implementation should be robust to future changes that
increase the number of log levels.
+Function : plat_get_soc_version()
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+ Argument : void
+ Return : int32_t
+
+This function returns soc version which mainly consist of below fields
+
+::
+
+ soc_version[30:24] = JEP-106 continuation code for the SiP
+ soc_version[23:16] = JEP-106 identification code with parity bit for the SiP
+
+Function : plat_get_soc_revision()
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+ Argument : void
+ Return : int32_t
+
+This function returns soc revision in below format
+
+::
+
+ soc_revision[0:30] = SOC revision of specific SOC
+
Modifications specific to a Boot Loader stage
---------------------------------------------
diff --git a/include/plat/arm/common/plat_arm.h b/include/plat/arm/common/plat_arm.h
index 6c2925a..a84047a 100644
--- a/include/plat/arm/common/plat_arm.h
+++ b/include/plat/arm/common/plat_arm.h
@@ -148,6 +148,12 @@
#define ARM_ROTPK_DEVEL_RSA_ID 2
#define ARM_ROTPK_DEVEL_ECDSA_ID 3
+/* Defines used to retrieve ARM SOC revision */
+#define ARM_SOC_CONTINUATION_CODE U(0x4)
+#define ARM_SOC_IDENTIFICATION_CODE U(0x3B)
+#define ARM_SOC_CONTINUATION_SHIFT U(24)
+#define ARM_SOC_IDENTIFICATION_SHIFT U(16)
+
/* IO storage utility functions */
int arm_io_setup(void);
@@ -323,4 +329,7 @@
void plat_arm_secure_wdt_start(void);
void plat_arm_secure_wdt_stop(void);
+/* Get SOC-ID of ARM platform */
+uint32_t plat_arm_get_soc_id(void);
+
#endif /* PLAT_ARM_H */
diff --git a/include/plat/common/platform.h b/include/plat/common/platform.h
index 5b5ebb9..e4431d2 100644
--- a/include/plat/common/platform.h
+++ b/include/plat/common/platform.h
@@ -322,4 +322,14 @@
*/
unsigned int platform_core_pos_helper(unsigned long mpidr);
+/*
+ * Optional function to get SOC version
+ */
+int32_t plat_get_soc_version(void);
+
+/*
+ * Optional function to get SOC revision
+ */
+int32_t plat_get_soc_revision(void);
+
#endif /* PLATFORM_H */
diff --git a/include/services/arm_arch_svc.h b/include/services/arm_arch_svc.h
index 1cb2038..5bbd8bb 100644
--- a/include/services/arm_arch_svc.h
+++ b/include/services/arm_arch_svc.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2018-2020, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -9,7 +9,11 @@
#define SMCCC_VERSION U(0x80000000)
#define SMCCC_ARCH_FEATURES U(0x80000001)
+#define SMCCC_ARCH_SOC_ID U(0x80000002)
#define SMCCC_ARCH_WORKAROUND_1 U(0x80008000)
#define SMCCC_ARCH_WORKAROUND_2 U(0x80007FFF)
+#define SMCCC_GET_SOC_VERSION U(0)
+#define SMCCC_GET_SOC_REVISION U(1)
+
#endif /* ARM_ARCH_SVC_H */
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());
+}
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)
{
diff --git a/services/arm_arch_svc/arm_arch_svc_setup.c b/services/arm_arch_svc/arm_arch_svc_setup.c
index 6dac56e..ba53930 100644
--- a/services/arm_arch_svc/arm_arch_svc_setup.c
+++ b/services/arm_arch_svc/arm_arch_svc_setup.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2018-2019, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2018-2020, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -12,18 +12,27 @@
#include <lib/smccc.h>
#include <services/arm_arch_svc.h>
#include <smccc_helpers.h>
+#include <plat/common/platform.h>
static int32_t smccc_version(void)
{
return MAKE_SMCCC_VERSION(SMCCC_MAJOR_VERSION, SMCCC_MINOR_VERSION);
}
-static int32_t smccc_arch_features(u_register_t arg)
+static int32_t smccc_arch_features(u_register_t arg1, u_register_t arg2)
{
- switch (arg) {
+ switch (arg1) {
case SMCCC_VERSION:
case SMCCC_ARCH_FEATURES:
return SMC_OK;
+ case SMCCC_ARCH_SOC_ID:
+ if (arg2 == SMCCC_GET_SOC_REVISION) {
+ return plat_get_soc_revision();
+ }
+ if (arg2 == SMCCC_GET_SOC_VERSION) {
+ return plat_get_soc_version();
+ }
+ return SMC_ARCH_CALL_INVAL_PARAM;
#if WORKAROUND_CVE_2017_5715
case SMCCC_ARCH_WORKAROUND_1:
if (check_wa_cve_2017_5715() == ERRATA_NOT_APPLIES)
@@ -94,7 +103,7 @@
case SMCCC_VERSION:
SMC_RET1(handle, smccc_version());
case SMCCC_ARCH_FEATURES:
- SMC_RET1(handle, smccc_arch_features(x1));
+ SMC_RET1(handle, smccc_arch_features(x1, x2));
#if WORKAROUND_CVE_2017_5715
case SMCCC_ARCH_WORKAROUND_1:
/*