1 /* 2 * Copyright (c) 2014-2021, 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/gtsi_svc.h> 17 #include <services/pci_svc.h> 18 #include <services/rmmd_svc.h> 19 #include <services/sdei.h> 20 #include <services/spm_mm_svc.h> 21 #include <services/spmd_svc.h> 22 #include <services/std_svc.h> 23 #include <services/trng_svc.h> 24 #include <smccc_helpers.h> 25 #include <tools_share/uuid.h> 26 27 /* Standard Service UUID */ 28 static uuid_t arm_svc_uid = { 29 {0x5b, 0x90, 0x8d, 0x10}, 30 {0x63, 0xf8}, 31 {0xe8, 0x47}, 32 0xae, 0x2d, 33 {0xc0, 0xfb, 0x56, 0x41, 0xf6, 0xe2} 34 }; 35 36 /* Setup Standard Services */ 37 static int32_t std_svc_setup(void) 38 { 39 uintptr_t svc_arg; 40 int ret = 0; 41 42 svc_arg = get_arm_std_svc_args(PSCI_FID_MASK); 43 assert(svc_arg); 44 45 /* 46 * PSCI is one of the specifications implemented as a Standard Service. 47 * The `psci_setup()` also does EL3 architectural setup. 48 */ 49 if (psci_setup((const psci_lib_args_t *)svc_arg) != PSCI_E_SUCCESS) { 50 ret = 1; 51 } 52 53 #if SPM_MM 54 if (spm_mm_setup() != 0) { 55 ret = 1; 56 } 57 #endif 58 59 #if defined(SPD_spmd) 60 if (spmd_setup() != 0) { 61 ret = 1; 62 } 63 #endif 64 65 #if SDEI_SUPPORT 66 /* SDEI initialisation */ 67 sdei_init(); 68 #endif 69 70 trng_setup(); 71 72 return ret; 73 } 74 75 /* 76 * Top-level Standard Service SMC handler. This handler will in turn dispatch 77 * calls to PSCI SMC handler 78 */ 79 static uintptr_t std_svc_smc_handler(uint32_t smc_fid, 80 u_register_t x1, 81 u_register_t x2, 82 u_register_t x3, 83 u_register_t x4, 84 void *cookie, 85 void *handle, 86 u_register_t flags) 87 { 88 if (((smc_fid >> FUNCID_CC_SHIFT) & FUNCID_CC_MASK) == SMC_32) { 89 /* 32-bit SMC function, clear top parameter bits */ 90 91 x1 &= UINT32_MAX; 92 x2 &= UINT32_MAX; 93 x3 &= UINT32_MAX; 94 x4 &= UINT32_MAX; 95 } 96 97 /* 98 * Dispatch PSCI calls to PSCI SMC handler and return its return 99 * value 100 */ 101 if (is_psci_fid(smc_fid)) { 102 uint64_t ret; 103 104 #if ENABLE_RUNTIME_INSTRUMENTATION 105 106 /* 107 * Flush cache line so that even if CPU power down happens 108 * the timestamp update is reflected in memory. 109 */ 110 PMF_WRITE_TIMESTAMP(rt_instr_svc, 111 RT_INSTR_ENTER_PSCI, 112 PMF_CACHE_MAINT, 113 get_cpu_data(cpu_data_pmf_ts[CPU_DATA_PMF_TS0_IDX])); 114 #endif 115 116 ret = psci_smc_handler(smc_fid, x1, x2, x3, x4, 117 cookie, handle, flags); 118 119 #if ENABLE_RUNTIME_INSTRUMENTATION 120 PMF_CAPTURE_TIMESTAMP(rt_instr_svc, 121 RT_INSTR_EXIT_PSCI, 122 PMF_NO_CACHE_MAINT); 123 #endif 124 125 SMC_RET1(handle, ret); 126 } 127 128 #if SPM_MM 129 /* 130 * Dispatch SPM calls to SPM SMC handler and return its return 131 * value 132 */ 133 if (is_spm_mm_fid(smc_fid)) { 134 return spm_mm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 135 handle, flags); 136 } 137 #endif 138 139 #if defined(SPD_spmd) 140 /* 141 * Dispatch FFA calls to the FFA SMC handler implemented by the SPM 142 * dispatcher and return its return value 143 */ 144 if (is_ffa_fid(smc_fid)) { 145 return spmd_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 146 handle, flags); 147 } 148 #endif 149 150 #if SDEI_SUPPORT 151 if (is_sdei_fid(smc_fid)) { 152 return sdei_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 153 flags); 154 } 155 #endif 156 157 #if TRNG_SUPPORT 158 if (is_trng_fid(smc_fid)) { 159 return trng_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 160 flags); 161 } 162 #endif 163 #if ENABLE_RME 164 /* 165 * Granule transition service interface functions (GTSI) are allocated 166 * from the Std service range. Call the RMM dispatcher to handle calls. 167 */ 168 if (is_gtsi_fid(smc_fid)) { 169 return rmmd_gtsi_handler(smc_fid, x1, x2, x3, x4, cookie, 170 handle, flags); 171 } 172 #endif 173 174 #if SMC_PCI_SUPPORT 175 if (is_pci_fid(smc_fid)) { 176 return pci_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 177 flags); 178 } 179 #endif 180 181 switch (smc_fid) { 182 case ARM_STD_SVC_CALL_COUNT: 183 /* 184 * Return the number of Standard Service Calls. PSCI is the only 185 * standard service implemented; so return number of PSCI calls 186 */ 187 SMC_RET1(handle, PSCI_NUM_CALLS); 188 189 case ARM_STD_SVC_UID: 190 /* Return UID to the caller */ 191 SMC_UUID_RET(handle, arm_svc_uid); 192 193 case ARM_STD_SVC_VERSION: 194 /* Return the version of current implementation */ 195 SMC_RET2(handle, STD_SVC_VERSION_MAJOR, STD_SVC_VERSION_MINOR); 196 197 default: 198 VERBOSE("Unimplemented Standard Service Call: 0x%x \n", smc_fid); 199 SMC_RET1(handle, SMC_UNK); 200 } 201 } 202 203 /* Register Standard Service Calls as runtime service */ 204 DECLARE_RT_SVC( 205 std_svc, 206 207 OEN_STD_START, 208 OEN_STD_END, 209 SMC_TYPE_FAST, 210 std_svc_setup, 211 std_svc_smc_handler 212 ); 213