ehf: use common priority level enumuration

'EHF' is used by RAS, SDEI, SPM_MM common frameworks.
If platform needs to plug-in specific handlers then
'PLAT_EHF_DESC' can be used to populate platform specific
priority levels.

Signed-off-by: Sandeep Tripathy <sandeep.tripathy@broadcom.com>
Change-Id: I37af7e0e48111f87b6982604bf5c15db3e05755d
diff --git a/include/plat/arm/common/arm_def.h b/include/plat/arm/common/arm_def.h
index 293e7ce..c018643 100644
--- a/include/plat/arm/common/arm_def.h
+++ b/include/plat/arm/common/arm_def.h
@@ -568,7 +568,7 @@
 #define PLAT_SDEI_NORMAL_PRI		0x70
 
 /* ARM platforms use 3 upper bits of secure interrupt priority */
-#define ARM_PRI_BITS			3
+#define PLAT_PRI_BITS			3
 
 /* SGI used for SDEI signalling */
 #define ARM_SDEI_SGI			ARM_IRQ_SEC_SGI_0
diff --git a/plat/arm/common/aarch64/arm_ehf.c b/plat/arm/common/aarch64/arm_ehf.c
deleted file mode 100644
index 69ebd79..0000000
--- a/plat/arm/common/aarch64/arm_ehf.c
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
-
-#include <platform_def.h>
-
-#include <bl31/ehf.h>
-
-/*
- * 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),
-
-	/* Normal priority SDEI */
-	EHF_PRI_DESC(ARM_PRI_BITS, PLAT_SDEI_NORMAL_PRI),
-#endif
-#if SPM_MM
-	EHF_PRI_DESC(ARM_PRI_BITS, PLAT_SP_PRI),
-#endif
-};
-
-/* Plug in ARM exceptions to Exception Handling Framework. */
-EHF_REGISTER_PRIORITIES(arm_exceptions, ARRAY_SIZE(arm_exceptions), ARM_PRI_BITS);
diff --git a/plat/arm/common/arm_common.mk b/plat/arm/common/arm_common.mk
index 96ab2d3..78c0153 100644
--- a/plat/arm/common/arm_common.mk
+++ b/plat/arm/common/arm_common.mk
@@ -258,7 +258,7 @@
 endif
 
 ifeq (${EL3_EXCEPTION_HANDLING},1)
-BL31_SOURCES		+=	plat/arm/common/aarch64/arm_ehf.c
+BL31_SOURCES		+=	plat/common/aarch64/plat_ehf.c
 endif
 
 ifeq (${SDEI_SUPPORT},1)
diff --git a/plat/common/aarch64/plat_ehf.c b/plat/common/aarch64/plat_ehf.c
new file mode 100644
index 0000000..da76884
--- /dev/null
+++ b/plat/common/aarch64/plat_ehf.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2017-2020, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2020, Broadcom
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <bl31/ehf.h>
+
+#include <platform_def.h>
+
+/*
+ * Enumeration of priority levels on ARM platforms.
+ */
+ehf_pri_desc_t plat_exceptions[] = {
+#if RAS_EXTENSION
+	/* RAS Priority */
+	EHF_PRI_DESC(PLAT_PRI_BITS, PLAT_RAS_PRI),
+#endif
+
+#if SDEI_SUPPORT
+	/* Critical priority SDEI */
+	EHF_PRI_DESC(PLAT_PRI_BITS, PLAT_SDEI_CRITICAL_PRI),
+
+	/* Normal priority SDEI */
+	EHF_PRI_DESC(PLAT_PRI_BITS, PLAT_SDEI_NORMAL_PRI),
+#endif
+#if SPM_MM
+	EHF_PRI_DESC(PLAT_PRI_BITS, PLAT_SP_PRI),
+#endif
+	/* Plaform specific exceptions description */
+#ifdef PLAT_EHF_DESC
+	PLAT_EHF_DESC,
+#endif
+};
+
+/* Plug in ARM exceptions to Exception Handling Framework. */
+EHF_REGISTER_PRIORITIES(plat_exceptions, ARRAY_SIZE(plat_exceptions), PLAT_PRI_BITS);