AArch64: Introduce External Abort handling
At present, any External Abort routed to EL3 is reported as an unhandled
exception and cause a panic. This patch enables ARM Trusted Firmware to
handle External Aborts routed to EL3.
With this patch, when an External Abort is received at EL3, its handling
is delegated to plat_ea_handler() function. Platforms can provide their
own implementation of this function. This patch adds a weak definition
of the said function that prints out a message and just panics.
In order to support handling External Aborts at EL3, the build option
HANDLE_EA_EL3_FIRST must be set to 1.
Before this patch, HANDLE_EA_EL3_FIRST wasn't passed down to
compilation; this patch fixes that too.
Change-Id: I4d07b7e65eb191ff72d63b909ae9512478cd01a1
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>
diff --git a/include/bl31/ea_handle.h b/include/bl31/ea_handle.h
new file mode 100644
index 0000000..285132b
--- /dev/null
+++ b/include/bl31/ea_handle.h
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef __EA_HANDLE_H__
+#define __EA_HANDLE_H__
+
+/* Constants indicating the reason for an External Abort */
+
+/* External Abort received at SError vector */
+#define ERROR_EA_ASYNC 0
+
+/* Synchronous External Abort received at Synchronous exception vector */
+#define ERROR_EA_SYNC 1
+
+#endif /* __EA_HANDLE_H__ */