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14c6016ad5
RAS extensions are mandatory for ARMv8.2 CPUs, but are also optional extensions to base ARMv8.0 architecture. This patch adds build system support to enable RAS features in ARM Trusted Firmware. A boolean build option RAS_EXTENSION is introduced for this. With RAS_EXTENSION, an Exception Synchronization Barrier (ESB) is inserted at all EL3 vector entry and exit. ESBs will synchronize pending external aborts before entering EL3, and therefore will contain and attribute errors to lower EL execution. Any errors thus synchronized are detected via. DISR_EL1 register. When RAS_EXTENSION is set to 1, HANDLE_EL3_EA_FIRST must also be set to 1. Change-Id: I38a19d84014d4d8af688bd81d61ba582c039383a Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>
21 lines
517 B
C
21 lines
517 B
C
/*
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* Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef __EA_HANDLE_H__
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#define __EA_HANDLE_H__
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/* Constants indicating the reason for an External Abort */
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/* External Abort received at SError vector */
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#define ERROR_EA_ASYNC 0
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/* Synchronous External Abort received at Synchronous exception vector */
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#define ERROR_EA_SYNC 1
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/* External Abort synchronized by ESB instruction */
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#define ERROR_EA_ESB 2
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#endif /* __EA_HANDLE_H__ */
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