121 lines
3.2 KiB
C
121 lines
3.2 KiB
C
/*
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* Copyright (c) 2014-2020, 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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#include <assert.h>
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#include <inttypes.h>
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#include <stdint.h>
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#include <arch_helpers.h>
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#include <drivers/console.h>
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#if RAS_EXTENSION
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#include <lib/extensions/ras.h>
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#endif
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#include <lib/extensions/twed.h>
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#include <lib/xlat_tables/xlat_mmu_helpers.h>
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#include <plat/common/platform.h>
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/*
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* The following platform setup functions are weakly defined. They
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* provide typical implementations that may be re-used by multiple
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* platforms but may also be overridden by a platform if required.
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*/
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#pragma weak bl31_plat_runtime_setup
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#pragma weak plat_arm_set_twedel_scr_el3
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#if SDEI_SUPPORT
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#pragma weak plat_sdei_handle_masked_trigger
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#pragma weak plat_sdei_validate_entry_point
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#endif
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#pragma weak plat_ea_handler = plat_default_ea_handler
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void bl31_plat_runtime_setup(void)
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{
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console_switch_state(CONSOLE_FLAG_RUNTIME);
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}
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/*
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* Helper function for platform_get_pos() when platform compatibility is
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* disabled. This is to enable SPDs using the older platform API to continue
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* to work.
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*/
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unsigned int platform_core_pos_helper(unsigned long mpidr)
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{
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int idx = plat_core_pos_by_mpidr(mpidr);
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assert(idx >= 0);
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return idx;
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}
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#if SDEI_SUPPORT
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/*
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* Function that handles spurious SDEI interrupts while events are masked.
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*/
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void plat_sdei_handle_masked_trigger(uint64_t mpidr, unsigned int intr)
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{
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WARN("Spurious SDEI interrupt %u on masked PE %" PRIx64 "\n", intr, mpidr);
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}
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/*
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* Default Function to validate SDEI entry point, which returns success.
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* Platforms may override this with their own validation mechanism.
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*/
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int plat_sdei_validate_entry_point(uintptr_t ep, unsigned int client_mode)
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{
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return 0;
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}
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#endif
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#if !ENABLE_BACKTRACE
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static const char *get_el_str(unsigned int el)
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{
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if (el == MODE_EL3) {
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return "EL3";
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} else if (el == MODE_EL2) {
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return "EL2";
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}
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return "S-EL1";
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}
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#endif /* !ENABLE_BACKTRACE */
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/* RAS functions common to AArch64 ARM platforms */
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void plat_default_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie,
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void *handle, uint64_t flags)
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{
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#if RAS_EXTENSION
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/* Call RAS EA handler */
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int handled = ras_ea_handler(ea_reason, syndrome, cookie, handle, flags);
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if (handled != 0)
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return;
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#endif
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unsigned int level = (unsigned int)GET_EL(read_spsr_el3());
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ERROR_NL();
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ERROR("Unhandled External Abort received on 0x%lx from %s\n",
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read_mpidr_el1(), get_el_str(level));
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ERROR("exception reason=%u syndrome=0x%" PRIx64 "\n", ea_reason, syndrome);
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#if HANDLE_EA_EL3_FIRST
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/* Skip backtrace for lower EL */
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if (level != MODE_EL3) {
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console_flush();
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do_panic();
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}
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#endif
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panic();
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}
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/*******************************************************************************
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* In v8.6+ platforms with delayed trapping of WFE this hook sets the delay. It
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* is a weak function definition so can be overridden depending on the
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* requirements of a platform. The only hook provided is for the TWED fields
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* in SCR_EL3, the TWED fields in HCR_EL2, SCTLR_EL2, and SCTLR_EL1 should be
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* configured as needed in lower exception levels.
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******************************************************************************/
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uint32_t plat_arm_set_twedel_scr_el3(void)
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{
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return TWED_DISABLED;
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}
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