1 /* 2 * Copyright (c) 2014-2026, 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 ENABLE_FEAT_RAS 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 /* Pointer and function to register platform function to load alernate images */ 21 const struct plat_try_images_ops *plat_try_img_ops; 22 23 void plat_setup_try_img_ops(const struct plat_try_images_ops *plat_try_ops) 24 { 25 plat_try_img_ops = plat_try_ops; 26 } 27 28 /* 29 * The following platform setup functions are weakly defined. They 30 * provide typical implementations that may be re-used by multiple 31 * platforms but may also be overridden by a platform if required. 32 */ 33 #pragma weak bl31_plat_runtime_setup 34 35 #if SDEI_SUPPORT 36 #pragma weak plat_sdei_handle_masked_trigger 37 #pragma weak plat_sdei_validate_entry_point 38 #endif 39 40 #if FFH_SUPPORT 41 #pragma weak plat_ea_handler = plat_default_ea_handler 42 #endif 43 44 void bl31_plat_runtime_setup(void) 45 { 46 } 47 48 #if SDEI_SUPPORT 49 /* 50 * Function that handles spurious SDEI interrupts while events are masked. 51 */ 52 void plat_sdei_handle_masked_trigger(uint64_t mpidr, unsigned int intr) 53 { 54 WARN("Spurious SDEI interrupt %u on masked PE %" PRIx64 "\n", intr, mpidr); 55 } 56 57 /* 58 * Default Function to validate SDEI entry point, which returns success. 59 * Platforms may override this with their own validation mechanism. 60 */ 61 int plat_sdei_validate_entry_point(uintptr_t ep, unsigned int client_mode) 62 { 63 return 0; 64 } 65 #endif 66 67 /* AArch64 Exception level (as found in SPSR_EL3.M[3:0]) */ 68 const char *get_el_str(unsigned int el) 69 { 70 const char *mode = NULL; 71 72 switch (el) { 73 case MODE_EL3: 74 mode = "EL3"; 75 break; 76 case MODE_EL2: 77 mode = "EL2"; 78 break; 79 case MODE_EL1: 80 mode = "EL1"; 81 break; 82 case MODE_EL0: 83 mode = "EL0"; 84 break; 85 default: 86 assert(false); 87 break; 88 } 89 90 return mode; 91 } 92 93 /* AArc32 Mode (as found in SPSR_EL3.M[3:0]) */ 94 const char *get_mode_str(unsigned int spsr_mode) 95 { 96 const char *mode = NULL; 97 98 switch (spsr_mode) { 99 case MODE32_usr: 100 mode = "User"; 101 break; 102 case MODE32_fiq: 103 mode = "FIQ"; 104 break; 105 case MODE32_irq: 106 mode = "IRQ"; 107 break; 108 case MODE32_svc: 109 mode = "Supervisor"; 110 break; 111 case MODE32_mon: 112 mode = "Monitor"; 113 break; 114 case MODE32_abt: 115 mode = "Abort"; 116 break; 117 case MODE32_hyp: 118 mode = "Hyp"; 119 break; 120 case MODE32_und: 121 mode = "Undefined"; 122 break; 123 case MODE32_sys: 124 mode = "System"; 125 break; 126 default: 127 assert(false); 128 break; 129 } 130 return mode; 131 } 132 133 #if FFH_SUPPORT 134 /* Handler for External Aborts from lower EL including RAS errors */ 135 void plat_default_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie, 136 void *handle, uint64_t flags) 137 { 138 #if ENABLE_FEAT_RAS 139 /* Call RAS EA handler */ 140 int handled = ras_ea_handler(ea_reason, syndrome, cookie, handle, flags); 141 if (handled != 0) 142 return; 143 #endif 144 unsigned int level = (unsigned int)GET_EL(read_spsr_el3()); 145 146 ERROR_NL(); 147 ERROR("Unhandled External Abort received on 0x%lx from %s\n", 148 read_mpidr_el1(), get_el_str(level)); 149 ERROR("exception reason=%u syndrome=0x%" PRIx64 "\n", ea_reason, syndrome); 150 151 panic(); 152 } 153 #endif 154