1 /* 2 * Copyright (c) 2014-2020, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <assert.h> 8 9 #include <arch_helpers.h> 10 #include <drivers/console.h> 11 #if RAS_EXTENSION 12 #include <lib/extensions/ras.h> 13 #endif 14 #include <lib/xlat_tables/xlat_mmu_helpers.h> 15 #include <plat/common/platform.h> 16 17 /* 18 * The following platform setup functions are weakly defined. They 19 * provide typical implementations that may be re-used by multiple 20 * platforms but may also be overridden by a platform if required. 21 */ 22 #pragma weak bl31_plat_runtime_setup 23 24 #if SDEI_SUPPORT 25 #pragma weak plat_sdei_handle_masked_trigger 26 #pragma weak plat_sdei_validate_entry_point 27 #endif 28 29 #pragma weak plat_ea_handler 30 31 void bl31_plat_runtime_setup(void) 32 { 33 console_switch_state(CONSOLE_FLAG_RUNTIME); 34 } 35 36 /* 37 * Helper function for platform_get_pos() when platform compatibility is 38 * disabled. This is to enable SPDs using the older platform API to continue 39 * to work. 40 */ 41 unsigned int platform_core_pos_helper(unsigned long mpidr) 42 { 43 int idx = plat_core_pos_by_mpidr(mpidr); 44 assert(idx >= 0); 45 return idx; 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 %llx\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 #if !ENABLE_BACKTRACE 68 static const char *get_el_str(unsigned int el) 69 { 70 if (el == MODE_EL3) { 71 return "EL3"; 72 } else if (el == MODE_EL2) { 73 return "EL2"; 74 } 75 return "S-EL1"; 76 } 77 #endif /* !ENABLE_BACKTRACE */ 78 79 /* RAS functions common to AArch64 ARM platforms */ 80 void plat_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie, 81 void *handle, uint64_t flags) 82 { 83 #if RAS_EXTENSION 84 /* Call RAS EA handler */ 85 int handled = ras_ea_handler(ea_reason, syndrome, cookie, handle, flags); 86 if (handled != 0) 87 return; 88 #endif 89 unsigned int level = (unsigned int)GET_EL(read_spsr_el3()); 90 91 ERROR("Unhandled External Abort received on 0x%lx from %s\n", 92 read_mpidr_el1(), get_el_str(level)); 93 ERROR("exception reason=%u syndrome=0x%llx\n", ea_reason, syndrome); 94 #if HANDLE_EA_EL3_FIRST 95 /* Skip backtrace for lower EL */ 96 if (level != MODE_EL3) { 97 (void)console_flush(); 98 do_panic(); 99 } 100 #endif 101 panic(); 102 } 103