1 /* 2 * Copyright (c) 2014-2024, 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 /* 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 #if FFH_SUPPORT 33 #pragma weak plat_ea_handler = plat_default_ea_handler 34 #endif 35 36 void bl31_plat_runtime_setup(void) 37 { 38 } 39 40 /* 41 * Helper function for platform_get_pos() when platform compatibility is 42 * disabled. This is to enable SPDs using the older platform API to continue 43 * to work. 44 */ 45 unsigned int platform_core_pos_helper(unsigned long mpidr) 46 { 47 int idx = plat_core_pos_by_mpidr(mpidr); 48 assert(idx >= 0); 49 return idx; 50 } 51 52 #if SDEI_SUPPORT 53 /* 54 * Function that handles spurious SDEI interrupts while events are masked. 55 */ 56 void plat_sdei_handle_masked_trigger(uint64_t mpidr, unsigned int intr) 57 { 58 WARN("Spurious SDEI interrupt %u on masked PE %" PRIx64 "\n", intr, mpidr); 59 } 60 61 /* 62 * Default Function to validate SDEI entry point, which returns success. 63 * Platforms may override this with their own validation mechanism. 64 */ 65 int plat_sdei_validate_entry_point(uintptr_t ep, unsigned int client_mode) 66 { 67 return 0; 68 } 69 #endif 70 71 const char *get_el_str(unsigned int el) 72 { 73 switch (el) { 74 case MODE_EL3: 75 return "EL3"; 76 case MODE_EL2: 77 return "EL2"; 78 case MODE_EL1: 79 return "EL1"; 80 case MODE_EL0: 81 return "EL0"; 82 default: 83 assert(false); 84 return NULL; 85 } 86 } 87 88 #if FFH_SUPPORT 89 /* Handler for External Aborts from lower EL including RAS errors */ 90 void plat_default_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie, 91 void *handle, uint64_t flags) 92 { 93 #if ENABLE_FEAT_RAS 94 /* Call RAS EA handler */ 95 int handled = ras_ea_handler(ea_reason, syndrome, cookie, handle, flags); 96 if (handled != 0) 97 return; 98 #endif 99 unsigned int level = (unsigned int)GET_EL(read_spsr_el3()); 100 101 ERROR_NL(); 102 ERROR("Unhandled External Abort received on 0x%lx from %s\n", 103 read_mpidr_el1(), get_el_str(level)); 104 ERROR("exception reason=%u syndrome=0x%" PRIx64 "\n", ea_reason, syndrome); 105 106 /* We reached here due to a panic from a lower EL and assuming this is the default 107 * platform registered handler that we could call on a lower EL panic. 108 */ 109 lower_el_panic(); 110 } 111 #endif 112