| /* |
| * Copyright (c) 2014-2020, ARM Limited and Contributors. All rights reserved. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include <assert.h> |
| |
| #include <arch_helpers.h> |
| #include <drivers/console.h> |
| #if RAS_EXTENSION |
| #include <lib/extensions/ras.h> |
| #endif |
| #include <lib/extensions/twed.h> |
| #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 |
| #pragma weak plat_arm_set_twedel_scr_el3 |
| |
| #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 %llx\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 |
| |
| #if !ENABLE_BACKTRACE |
| static const char *get_el_str(unsigned int el) |
| { |
| if (el == MODE_EL3) { |
| return "EL3"; |
| } else if (el == MODE_EL2) { |
| return "EL2"; |
| } |
| return "S-EL1"; |
| } |
| #endif /* !ENABLE_BACKTRACE */ |
| |
| /* RAS functions common to AArch64 ARM platforms */ |
| void plat_default_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie, |
| void *handle, uint64_t flags) |
| { |
| #if RAS_EXTENSION |
| /* 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%llx\n", ea_reason, syndrome); |
| #if HANDLE_EA_EL3_FIRST |
| /* Skip backtrace for lower EL */ |
| if (level != MODE_EL3) { |
| console_flush(); |
| do_panic(); |
| } |
| #endif |
| panic(); |
| } |
| |
| /******************************************************************************* |
| * In v8.6+ platforms with delayed trapping of WFE this hook sets the delay. It |
| * is a weak function definition so can be overridden depending on the |
| * requirements of a platform. The only hook provided is for the TWED fields |
| * in SCR_EL3, the TWED fields in HCR_EL2, SCTLR_EL2, and SCTLR_EL1 should be |
| * configured as needed in lower exception levels. |
| ******************************************************************************/ |
| |
| uint32_t plat_arm_set_twedel_scr_el3(void) |
| { |
| return TWED_DISABLED; |
| } |