mirror of
https://github.com/ARM-software/arm-trusted-firmware.git
synced 2025-04-17 01:54:22 +00:00
9202d51990
The current usage of RAS_EXTENSION in TF-A codebase is to cater for two things in TF-A : 1. Pull in necessary framework and platform hooks for Firmware first handling(FFH) of RAS errors. 2. Manage the FEAT_RAS extension when switching the worlds. FFH means that all the EAs from NS are trapped in EL3 first and signaled to NS world later after the first handling is done in firmware. There is an alternate way of handling RAS errors viz Kernel First handling(KFH). Tying FEAT_RAS to RAS_EXTENSION build flag was not correct as the feature is needed for proper handling KFH in as well. This patch breaks down the RAS_EXTENSION flag into a flag to denote the CPU architecture `ENABLE_FEAT_RAS` which is used in context management during world switch and another flag `RAS_FFH_SUPPORT` to pull in required framework and platform hooks for FFH. Proper support for KFH will be added in future patches. BREAKING CHANGE: The previous RAS_EXTENSION is now deprecated. The equivalent functionality can be achieved by the following 2 options: - ENABLE_FEAT_RAS - RAS_FFH_SUPPORT Signed-off-by: Manish Pandey <manish.pandey2@arm.com> Change-Id: I1abb9ab6622b8f1b15712b12f17612804d48a6ec
101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
/*
|
|
* Copyright (c) 2014-2023, Arm Limited and Contributors. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#include <assert.h>
|
|
#include <inttypes.h>
|
|
#include <stdint.h>
|
|
|
|
#include <arch_helpers.h>
|
|
#include <common/debug.h>
|
|
#include <drivers/console.h>
|
|
#if RAS_FFH_SUPPORT
|
|
#include <lib/extensions/ras.h>
|
|
#endif
|
|
#include <lib/xlat_tables/xlat_mmu_helpers.h>
|
|
#include <plat/common/platform.h>
|
|
|
|
/*
|
|
* The following platform setup functions are weakly defined. They
|
|
* provide typical implementations that may be re-used by multiple
|
|
* platforms but may also be overridden by a platform if required.
|
|
*/
|
|
#pragma weak bl31_plat_runtime_setup
|
|
|
|
#if SDEI_SUPPORT
|
|
#pragma weak plat_sdei_handle_masked_trigger
|
|
#pragma weak plat_sdei_validate_entry_point
|
|
#endif
|
|
|
|
#pragma weak plat_ea_handler = plat_default_ea_handler
|
|
|
|
void bl31_plat_runtime_setup(void)
|
|
{
|
|
console_switch_state(CONSOLE_FLAG_RUNTIME);
|
|
}
|
|
|
|
/*
|
|
* Helper function for platform_get_pos() when platform compatibility is
|
|
* disabled. This is to enable SPDs using the older platform API to continue
|
|
* to work.
|
|
*/
|
|
unsigned int platform_core_pos_helper(unsigned long mpidr)
|
|
{
|
|
int idx = plat_core_pos_by_mpidr(mpidr);
|
|
assert(idx >= 0);
|
|
return idx;
|
|
}
|
|
|
|
#if SDEI_SUPPORT
|
|
/*
|
|
* Function that handles spurious SDEI interrupts while events are masked.
|
|
*/
|
|
void plat_sdei_handle_masked_trigger(uint64_t mpidr, unsigned int intr)
|
|
{
|
|
WARN("Spurious SDEI interrupt %u on masked PE %" PRIx64 "\n", intr, mpidr);
|
|
}
|
|
|
|
/*
|
|
* Default Function to validate SDEI entry point, which returns success.
|
|
* Platforms may override this with their own validation mechanism.
|
|
*/
|
|
int plat_sdei_validate_entry_point(uintptr_t ep, unsigned int client_mode)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
const char *get_el_str(unsigned int el)
|
|
{
|
|
if (el == MODE_EL3) {
|
|
return "EL3";
|
|
} else if (el == MODE_EL2) {
|
|
return "EL2";
|
|
}
|
|
return "EL1";
|
|
}
|
|
|
|
/* Handler for External Aborts from lower EL including RAS errors */
|
|
void plat_default_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie,
|
|
void *handle, uint64_t flags)
|
|
{
|
|
#if RAS_FFH_SUPPORT
|
|
/* Call RAS EA handler */
|
|
int handled = ras_ea_handler(ea_reason, syndrome, cookie, handle, flags);
|
|
if (handled != 0)
|
|
return;
|
|
#endif
|
|
unsigned int level = (unsigned int)GET_EL(read_spsr_el3());
|
|
|
|
ERROR_NL();
|
|
ERROR("Unhandled External Abort received on 0x%lx from %s\n",
|
|
read_mpidr_el1(), get_el_str(level));
|
|
ERROR("exception reason=%u syndrome=0x%" PRIx64 "\n", ea_reason, syndrome);
|
|
|
|
/* We reached here due to a panic from a lower EL and assuming this is the default
|
|
* platform registered handler that we could call on a lower EL panic.
|
|
*/
|
|
lower_el_panic();
|
|
}
|