1 /* 2 * Copyright (c) 2014-2018, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <arch_helpers.h> 8 #include <assert.h> 9 #include <console.h> 10 #include <platform.h> 11 #if RAS_EXTENSION 12 #include <ras.h> 13 #endif 14 #include <xlat_mmu_helpers.h> 15 16 /* 17 * The following platform setup functions are weakly defined. They 18 * provide typical implementations that may be re-used by multiple 19 * platforms but may also be overridden by a platform if required. 20 */ 21 #pragma weak bl31_plat_enable_mmu 22 #pragma weak bl32_plat_enable_mmu 23 #pragma weak bl31_plat_runtime_setup 24 #if !ERROR_DEPRECATED 25 #pragma weak plat_get_syscnt_freq2 26 #pragma weak bl31_early_platform_setup2 27 #endif /* ERROR_DEPRECATED */ 28 29 #if SDEI_SUPPORT 30 #pragma weak plat_sdei_handle_masked_trigger 31 #pragma weak plat_sdei_validate_entry_point 32 #endif 33 34 #pragma weak plat_ea_handler 35 36 void bl31_plat_enable_mmu(uint32_t flags) 37 { 38 enable_mmu_el3(flags); 39 } 40 41 void bl32_plat_enable_mmu(uint32_t flags) 42 { 43 enable_mmu_el1(flags); 44 } 45 46 void bl31_plat_runtime_setup(void) 47 { 48 #if MULTI_CONSOLE_API 49 console_switch_state(CONSOLE_FLAG_RUNTIME); 50 #else 51 console_uninit(); 52 #endif 53 } 54 55 #if !ENABLE_PLAT_COMPAT 56 /* 57 * Helper function for platform_get_pos() when platform compatibility is 58 * disabled. This is to enable SPDs using the older platform API to continue 59 * to work. 60 */ 61 unsigned int platform_core_pos_helper(unsigned long mpidr) 62 { 63 int idx = plat_core_pos_by_mpidr(mpidr); 64 assert(idx >= 0); 65 return idx; 66 } 67 #endif 68 69 70 #if !ERROR_DEPRECATED 71 unsigned int plat_get_syscnt_freq2(void) 72 { 73 WARN("plat_get_syscnt_freq() is deprecated\n"); 74 WARN("Please define plat_get_syscnt_freq2()\n"); 75 /* 76 * Suppress deprecated declaration warning in compatibility function 77 */ 78 #pragma GCC diagnostic push 79 #pragma GCC diagnostic ignored "-Wdeprecated-declarations" 80 unsigned long long freq = plat_get_syscnt_freq(); 81 #pragma GCC diagnostic pop 82 83 assert(freq >> 32 == 0); 84 85 return (unsigned int)freq; 86 } 87 88 void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1, 89 u_register_t arg2, u_register_t arg3) 90 { 91 bl31_early_platform_setup((void *) arg0, (void *)arg1); 92 } 93 #endif /* ERROR_DEPRECATED */ 94 95 #if SDEI_SUPPORT 96 /* 97 * Function that handles spurious SDEI interrupts while events are masked. 98 */ 99 void plat_sdei_handle_masked_trigger(uint64_t mpidr, unsigned int intr) 100 { 101 WARN("Spurious SDEI interrupt %u on masked PE %llx\n", intr, mpidr); 102 } 103 104 /* 105 * Default Function to validate SDEI entry point, which returns success. 106 * Platforms may override this with their own validation mechanism. 107 */ 108 int plat_sdei_validate_entry_point(uintptr_t ep, unsigned int client_mode) 109 { 110 return 0; 111 } 112 #endif 113 114 /* RAS functions common to AArch64 ARM platforms */ 115 void plat_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie, 116 void *handle, uint64_t flags) 117 { 118 #if RAS_EXTENSION 119 /* Call RAS EA handler */ 120 int handled = ras_ea_handler(ea_reason, syndrome, cookie, handle, flags); 121 if (handled != 0) 122 return; 123 #endif 124 125 ERROR("Unhandled External Abort received on 0x%lx at EL3!\n", 126 read_mpidr_el1()); 127 ERROR(" exception reason=%u syndrome=0x%llx\n", ea_reason, syndrome); 128 panic(); 129 } 130