1 /* 2 * Copyright (c) 2014-2022, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <assert.h> 8 #include <inttypes.h> 9 #include <stdint.h> 10 11 #include <arch_helpers.h> 12 #include <common/debug.h> 13 #include <drivers/console.h> 14 #if RAS_EXTENSION 15 #include <lib/extensions/ras.h> 16 #endif 17 #include <lib/xlat_tables/xlat_mmu_helpers.h> 18 #include <plat/common/platform.h> 19 20 /* 21 * The following platform setup functions are weakly defined. They 22 * provide typical implementations that may be re-used by multiple 23 * platforms but may also be overridden by a platform if required. 24 */ 25 #pragma weak bl31_plat_runtime_setup 26 27 #if SDEI_SUPPORT 28 #pragma weak plat_sdei_handle_masked_trigger 29 #pragma weak plat_sdei_validate_entry_point 30 #endif 31 32 #pragma weak plat_ea_handler = plat_default_ea_handler 33 34 void bl31_plat_runtime_setup(void) 35 { 36 console_switch_state(CONSOLE_FLAG_RUNTIME); 37 } 38 39 /* 40 * Helper function for platform_get_pos() when platform compatibility is 41 * disabled. This is to enable SPDs using the older platform API to continue 42 * to work. 43 */ 44 unsigned int platform_core_pos_helper(unsigned long mpidr) 45 { 46 int idx = plat_core_pos_by_mpidr(mpidr); 47 assert(idx >= 0); 48 return idx; 49 } 50 51 #if SDEI_SUPPORT 52 /* 53 * Function that handles spurious SDEI interrupts while events are masked. 54 */ 55 void plat_sdei_handle_masked_trigger(uint64_t mpidr, unsigned int intr) 56 { 57 WARN("Spurious SDEI interrupt %u on masked PE %" PRIx64 "\n", intr, mpidr); 58 } 59 60 /* 61 * Default Function to validate SDEI entry point, which returns success. 62 * Platforms may override this with their own validation mechanism. 63 */ 64 int plat_sdei_validate_entry_point(uintptr_t ep, unsigned int client_mode) 65 { 66 return 0; 67 } 68 #endif 69 70 #if !ENABLE_BACKTRACE 71 static const char *get_el_str(unsigned int el) 72 { 73 if (el == MODE_EL3) { 74 return "EL3"; 75 } else if (el == MODE_EL2) { 76 return "EL2"; 77 } 78 return "S-EL1"; 79 } 80 #endif /* !ENABLE_BACKTRACE */ 81 82 /* RAS functions common to AArch64 ARM platforms */ 83 void plat_default_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie, 84 void *handle, uint64_t flags) 85 { 86 #if RAS_EXTENSION 87 /* Call RAS EA handler */ 88 int handled = ras_ea_handler(ea_reason, syndrome, cookie, handle, flags); 89 if (handled != 0) 90 return; 91 #endif 92 unsigned int level = (unsigned int)GET_EL(read_spsr_el3()); 93 94 ERROR_NL(); 95 ERROR("Unhandled External Abort received on 0x%lx from %s\n", 96 read_mpidr_el1(), get_el_str(level)); 97 ERROR("exception reason=%u syndrome=0x%" PRIx64 "\n", ea_reason, syndrome); 98 #if HANDLE_EA_EL3_FIRST 99 /* Skip backtrace for lower EL */ 100 if (level != MODE_EL3) { 101 console_flush(); 102 do_panic(); 103 } 104 #endif 105 panic(); 106 } 107