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