ARM Platforms: Support RAS

- Assign 0x10 for RAS exceptions on ARM platforms, and install
    EHF priority descriptor.

  - Call the common RAS initialisation from ARM BL31 setup.

  - Add empty definitions for platform error records and RAS interrupts.

Change-Id: I0675f299b7840be4c83a9c7a81073a95c605dc90
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>

include/plat/arm/common/arm_def.h

@@ -483,6 +483,7 @@
 #define PLAT_PERCPU_BAKERY_LOCK_SIZE		(1 * CACHE_WRITEBACK_GRANULE)
 
 /* Priority levels for ARM platforms */
+#define PLAT_RAS_PRI			0x10
 #define PLAT_SDEI_CRITICAL_PRI		0x60
 #define PLAT_SDEI_NORMAL_PRI		0x70
 

plat/arm/common/aarch64/arm_ehf.c

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -11,6 +11,11 @@
  * Enumeration of priority levels on ARM platforms.
  */
 ehf_pri_desc_t arm_exceptions[] = {
+#if RAS_EXTENSION
+	/* RAS Priority */
+	EHF_PRI_DESC(ARM_PRI_BITS, PLAT_RAS_PRI),
+#endif
+
 #if SDEI_SUPPORT
 	/* Critical priority SDEI */
 	EHF_PRI_DESC(ARM_PRI_BITS, PLAT_SDEI_CRITICAL_PRI),

plat/arm/common/aarch64/arm_ras.c

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <ras.h>
+
+struct ras_interrupt arm_ras_interrupts[] = {
+};
+
+struct err_record_info arm_err_records[] = {
+};
+
+REGISTER_ERR_RECORD_INFO(arm_err_records);
+REGISTER_RAS_INTERRUPTS(arm_ras_interrupts);

plat/arm/common/arm_bl31_setup.c

@@ -14,6 +14,7 @@
 #include <mmio.h>
 #include <plat_arm.h>
 #include <platform.h>
+#include <ras.h>
 
 #define BL31_END (uintptr_t)(&__BL31_END__)
 
@@ -217,6 +218,10 @@ void arm_bl31_platform_setup(void)
 
 	/* Initialize power controller before setting up topology */
 	plat_arm_pwrc_setup();
+
+#if RAS_EXTENSION
+	ras_init();
+#endif
 }
 
 /*******************************************************************************

plat/arm/common/arm_common.mk

@@ -203,6 +203,13 @@ ifeq (${SDEI_SUPPORT},1)
 BL31_SOURCES		+=	plat/arm/common/aarch64/arm_sdei.c
 endif
 
+# RAS sources
+ifeq (${RAS_EXTENSION},1)
+BL31_SOURCES		+=	lib/extensions/ras/std_err_record.c		\
+				lib/extensions/ras/ras_common.c \
+				plat/arm/common/aarch64/arm_ras.c
+endif
+
 ifneq (${TRUSTED_BOARD_BOOT},0)
 
     # Include common TBB sources