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 #include <stdint.h> 9 10 #include <common/debug.h> 11 #include <common/runtime_svc.h> 12 #include <lib/el3_runtime/cpu_data.h> 13 #include <lib/pmf/pmf.h> 14 #include <lib/psci/psci.h> 15 #include <lib/runtime_instr.h> 16 #include <services/sdei.h> 17 #include <services/spm_mm_svc.h> 18 #include <services/spmd_svc.h> 19 #include <services/std_svc.h> 20 #include <smccc_helpers.h> 21 #include <tools_share/uuid.h> 22 23 /* Standard Service UUID */ 24 static uuid_t arm_svc_uid = { 25 {0x5b, 0x90, 0x8d, 0x10}, 26 {0x63, 0xf8}, 27 {0xe8, 0x47}, 28 0xae, 0x2d, 29 {0xc0, 0xfb, 0x56, 0x41, 0xf6, 0xe2} 30 }; 31 32 /* Setup Standard Services */ 33 static int32_t std_svc_setup(void) 34 { 35 uintptr_t svc_arg; 36 int ret = 0; 37 38 svc_arg = get_arm_std_svc_args(PSCI_FID_MASK); 39 assert(svc_arg); 40 41 /* 42 * PSCI is one of the specifications implemented as a Standard Service. 43 * The `psci_setup()` also does EL3 architectural setup. 44 */ 45 if (psci_setup((const psci_lib_args_t *)svc_arg) != PSCI_E_SUCCESS) { 46 ret = 1; 47 } 48 49 #if SPM_MM 50 if (spm_mm_setup() != 0) { 51 ret = 1; 52 } 53 #endif 54 55 #if defined(SPD_spmd) 56 if (spmd_setup() != 0) { 57 ret = 1; 58 } 59 #endif 60 61 #if SDEI_SUPPORT 62 /* SDEI initialisation */ 63 sdei_init(); 64 #endif 65 66 return ret; 67 } 68 69 /* 70 * Top-level Standard Service SMC handler. This handler will in turn dispatch 71 * calls to PSCI SMC handler 72 */ 73 static uintptr_t std_svc_smc_handler(uint32_t smc_fid, 74 u_register_t x1, 75 u_register_t x2, 76 u_register_t x3, 77 u_register_t x4, 78 void *cookie, 79 void *handle, 80 u_register_t flags) 81 { 82 /* 83 * Dispatch PSCI calls to PSCI SMC handler and return its return 84 * value 85 */ 86 if (is_psci_fid(smc_fid)) { 87 uint64_t ret; 88 89 #if ENABLE_RUNTIME_INSTRUMENTATION 90 91 /* 92 * Flush cache line so that even if CPU power down happens 93 * the timestamp update is reflected in memory. 94 */ 95 PMF_WRITE_TIMESTAMP(rt_instr_svc, 96 RT_INSTR_ENTER_PSCI, 97 PMF_CACHE_MAINT, 98 get_cpu_data(cpu_data_pmf_ts[CPU_DATA_PMF_TS0_IDX])); 99 #endif 100 101 ret = psci_smc_handler(smc_fid, x1, x2, x3, x4, 102 cookie, handle, flags); 103 104 #if ENABLE_RUNTIME_INSTRUMENTATION 105 PMF_CAPTURE_TIMESTAMP(rt_instr_svc, 106 RT_INSTR_EXIT_PSCI, 107 PMF_NO_CACHE_MAINT); 108 #endif 109 110 SMC_RET1(handle, ret); 111 } 112 113 #if SPM_MM 114 /* 115 * Dispatch SPM calls to SPM SMC handler and return its return 116 * value 117 */ 118 if (is_spm_mm_fid(smc_fid)) { 119 return spm_mm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 120 handle, flags); 121 } 122 #endif 123 124 #if defined(SPD_spmd) 125 /* 126 * Dispatch SPCI calls to the SPCI SMC handler implemented by the SPM 127 * dispatcher and return its return value 128 */ 129 if (is_spci_fid(smc_fid)) { 130 return spmd_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 131 handle, flags); 132 } 133 #endif 134 135 #if SDEI_SUPPORT 136 if (is_sdei_fid(smc_fid)) { 137 return sdei_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 138 flags); 139 } 140 #endif 141 142 switch (smc_fid) { 143 case ARM_STD_SVC_CALL_COUNT: 144 /* 145 * Return the number of Standard Service Calls. PSCI is the only 146 * standard service implemented; so return number of PSCI calls 147 */ 148 SMC_RET1(handle, PSCI_NUM_CALLS); 149 150 case ARM_STD_SVC_UID: 151 /* Return UID to the caller */ 152 SMC_UUID_RET(handle, arm_svc_uid); 153 154 case ARM_STD_SVC_VERSION: 155 /* Return the version of current implementation */ 156 SMC_RET2(handle, STD_SVC_VERSION_MAJOR, STD_SVC_VERSION_MINOR); 157 158 default: 159 WARN("Unimplemented Standard Service Call: 0x%x \n", smc_fid); 160 SMC_RET1(handle, SMC_UNK); 161 } 162 } 163 164 /* Register Standard Service Calls as runtime service */ 165 DECLARE_RT_SVC( 166 std_svc, 167 168 OEN_STD_START, 169 OEN_STD_END, 170 SMC_TYPE_FAST, 171 std_svc_setup, 172 std_svc_smc_handler 173 ); 174