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_features.h> 12 #include <arch_helpers.h> 13 #include <common/debug.h> 14 #include <drivers/console.h> 15 #include <lib/extensions/ras.h> 16 #include <lib/xlat_tables/xlat_mmu_helpers.h> 17 #include <plat/common/platform.h> 18 19 /* Pointer and function to register platform function to load alernate images */ 20 const struct plat_try_images_ops *plat_try_img_ops; 21 22 void plat_setup_try_img_ops(const struct plat_try_images_ops *plat_try_ops) 23 { 24 plat_try_img_ops = plat_try_ops; 25 } 26 27 /* 28 * The following platform setup functions are weakly defined. They 29 * provide typical implementations that may be re-used by multiple 30 * platforms but may also be overridden by a platform if required. 31 */ 32 #pragma weak bl31_plat_runtime_setup 33 34 #if SDEI_SUPPORT 35 #pragma weak plat_sdei_handle_masked_trigger 36 #pragma weak plat_sdei_validate_entry_point 37 #endif 38 39 #if FFH_SUPPORT 40 #pragma weak plat_ea_handler = plat_default_ea_handler 41 #endif 42 43 void bl31_plat_runtime_setup(void) 44 { 45 } 46 47 #if SDEI_SUPPORT 48 /* 49 * Function that handles spurious SDEI interrupts while events are masked. 50 */ 51 void plat_sdei_handle_masked_trigger(uint64_t mpidr, unsigned int intr) 52 { 53 WARN("Spurious SDEI interrupt %u on masked PE %" PRIx64 "\n", intr, mpidr); 54 } 55 56 /* 57 * Default Function to validate SDEI entry point, which returns success. 58 * Platforms may override this with their own validation mechanism. 59 */ 60 int plat_sdei_validate_entry_point(uintptr_t ep, unsigned int client_mode) 61 { 62 return 0; 63 } 64 #endif 65 66 /* AArch64 Exception level (as found in SPSR_EL3.M[3:0]) */ 67 const char *get_el_str(unsigned int el) 68 { 69 const char *mode = NULL; 70 71 switch (el) { 72 case MODE_EL3: 73 mode = "EL3"; 74 break; 75 case MODE_EL2: 76 mode = "EL2"; 77 break; 78 case MODE_EL1: 79 mode = "EL1"; 80 break; 81 case MODE_EL0: 82 mode = "EL0"; 83 break; 84 default: 85 assert(false); 86 break; 87 } 88 89 return mode; 90 } 91 92 /* AArc32 Mode (as found in SPSR_EL3.M[3:0]) */ 93 const char *get_mode_str(unsigned int spsr_mode) 94 { 95 const char *mode = NULL; 96 97 switch (spsr_mode) { 98 case MODE32_usr: 99 mode = "User"; 100 break; 101 case MODE32_fiq: 102 mode = "FIQ"; 103 break; 104 case MODE32_irq: 105 mode = "IRQ"; 106 break; 107 case MODE32_svc: 108 mode = "Supervisor"; 109 break; 110 case MODE32_mon: 111 mode = "Monitor"; 112 break; 113 case MODE32_abt: 114 mode = "Abort"; 115 break; 116 case MODE32_hyp: 117 mode = "Hyp"; 118 break; 119 case MODE32_und: 120 mode = "Undefined"; 121 break; 122 case MODE32_sys: 123 mode = "System"; 124 break; 125 default: 126 assert(false); 127 break; 128 } 129 return mode; 130 } 131 132 #if FFH_SUPPORT 133 /* Handler for External Aborts from lower EL including RAS errors */ 134 void plat_default_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie, 135 void *handle, uint64_t flags) 136 { 137 if (is_feat_ras_supported()) { 138 /* Call RAS EA handler */ 139 int handled = ras_ea_handler(ea_reason, syndrome, cookie, handle, flags); 140 if (handled != 0) 141 return; 142 } 143 unsigned int level = (unsigned int)GET_EL(read_spsr_el3()); 144 145 ERROR_NL(); 146 ERROR("Unhandled External Abort received on 0x%lx from %s\n", 147 read_mpidr_el1(), get_el_str(level)); 148 ERROR("exception reason=%u syndrome=0x%" PRIx64 "\n", ea_reason, syndrome); 149 150 panic(); 151 } 152 #endif 153