diff options
| author | Jeenu Viswambharan <jeenu.viswambharan@arm.com> | 2017-09-22 08:32:10 +0100 |
|---|---|---|
| committer | Jeenu Viswambharan <jeenu.viswambharan@arm.com> | 2017-11-13 07:49:30 +0000 |
| commit | 21b818c05fa4ec8cec468aad690267c5be930ccd (patch) | |
| tree | 8fe600879542720ded4eed9a546c75fcfe5ed5be /include/lib | |
| parent | 4ee8d0becddd65b27206cc01ed0d896a6605b82b (diff) | |
BL31: Introduce Exception Handling Framework
EHF is a framework that allows dispatching of EL3 interrupts to their
respective handlers in EL3.
This framework facilitates the firmware-first error handling policy in
which asynchronous exceptions may be routed to EL3. Such exceptions may
be handed over to respective exception handlers. Individual handlers
might further delegate exception handling to lower ELs.
The framework associates the delegated execution to lower ELs with a
priority value. For interrupts, this corresponds to the priorities
programmed in GIC; for other types of exceptions, viz. SErrors or
Synchronous External Aborts, individual dispatchers shall explicitly
associate delegation to a secure priority. In order to prevent lower
priority interrupts from preempting higher priority execution, the
framework provides helpers to control preemption by virtue of
programming Priority Mask register in the interrupt controller.
This commit allows for handling interrupts targeted at EL3. Exception
handlers own interrupts by assigning them a range of secure priorities,
and registering handlers for each priority range it owns.
Support for exception handling in BL31 image is enabled by setting the
build option EL3_EXCEPTION_HANDLING=1.
Documentation to follow.
NOTE: The framework assumes the priority scheme supported by platform
interrupt controller is compliant with that of ARM GIC architecture (v2
or later).
Change-Id: I7224337e4cea47c6ca7d7a4ca22a3716939f7e42
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>
Diffstat (limited to 'include/lib')
| -rw-r--r-- | include/lib/el3_runtime/cpu_data.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/include/lib/el3_runtime/cpu_data.h b/include/lib/el3_runtime/cpu_data.h index bd787ce9..3f48de5e 100644 --- a/include/lib/el3_runtime/cpu_data.h +++ b/include/lib/el3_runtime/cpu_data.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2014-2016, ARM Limited and Contributors. All rights reserved. + * Copyright (c) 2014-2017, ARM Limited and Contributors. All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause */ @@ -7,6 +7,7 @@ #ifndef __CPU_DATA_H__ #define __CPU_DATA_H__ +#include <ehf.h> #include <platform_def.h> /* CACHE_WRITEBACK_GRANULE required */ #ifdef AARCH32 @@ -96,6 +97,9 @@ typedef struct cpu_data { #if PLAT_PCPU_DATA_SIZE uint8_t platform_cpu_data[PLAT_PCPU_DATA_SIZE]; #endif +#if defined(IMAGE_BL31) && EL3_EXCEPTION_HANDLING + pe_exc_data_t ehf_data; +#endif } __aligned(CACHE_WRITEBACK_GRANULE) cpu_data_t; #if CRASH_REPORTING |