1 /* 2 * Copyright (c) 2014-2025, 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/drtm_svc.h> 17 #include <services/errata_abi_svc.h> 18 #include <services/lfa_svc.h> 19 #include <services/pci_svc.h> 20 #include <services/rmmd_svc.h> 21 #include <services/sdei.h> 22 #include <services/spm_mm_svc.h> 23 #include <services/spmc_svc.h> 24 #include <services/spmd_svc.h> 25 #include <services/std_svc.h> 26 #include <services/trng_svc.h> 27 #include <smccc_helpers.h> 28 #include <tools_share/uuid.h> 29 30 /* Standard Service UUID */ 31 static uuid_t arm_svc_uid = { 32 {0x5b, 0x90, 0x8d, 0x10}, 33 {0x63, 0xf8}, 34 {0xe8, 0x47}, 35 0xae, 0x2d, 36 {0xc0, 0xfb, 0x56, 0x41, 0xf6, 0xe2} 37 }; 38 39 /* Setup Standard Services */ 40 static int32_t std_svc_setup(void) 41 { 42 uintptr_t svc_arg; 43 int ret = 0; 44 45 svc_arg = get_arm_std_svc_args(PSCI_FID_MASK); 46 assert(svc_arg); 47 48 /* 49 * PSCI is one of the specifications implemented as a Standard Service. 50 * The `psci_setup()` also does EL3 architectural setup. 51 */ 52 if (psci_setup((const psci_lib_args_t *)svc_arg) != PSCI_E_SUCCESS) { 53 ret = 1; 54 } 55 56 #if SPM_MM 57 if (spm_mm_setup() != 0) { 58 ret = 1; 59 } 60 #endif 61 62 #if defined(SPD_spmd) 63 if (spmd_setup() != 0) { 64 ret = 1; 65 } 66 #endif 67 68 #if ENABLE_RME 69 if (rmmd_setup() != 0) { 70 WARN("RMMD setup failed. Continuing boot.\n"); 71 } 72 #endif 73 74 #if SDEI_SUPPORT 75 /* SDEI initialisation */ 76 sdei_init(); 77 #endif 78 79 #if TRNG_SUPPORT 80 /* TRNG initialisation */ 81 trng_setup(); 82 #endif /* TRNG_SUPPORT */ 83 84 #if DRTM_SUPPORT 85 if (drtm_setup() != 0) { 86 ret = 1; 87 } 88 #endif /* DRTM_SUPPORT */ 89 90 #if LFA_SUPPORT 91 /* 92 * Setup/Initialize resources useful during LFA 93 */ 94 if (lfa_setup() != 0) { 95 ret = 1; 96 } 97 #endif /* LFA_SUPPORT */ 98 99 return ret; 100 } 101 102 /* 103 * Top-level Standard Service SMC handler. This handler will in turn dispatch 104 * calls to PSCI SMC handler 105 */ 106 static uintptr_t std_svc_smc_handler(uint32_t smc_fid, 107 u_register_t x1_arg, 108 u_register_t x2_arg, 109 u_register_t x3_arg, 110 u_register_t x4_arg, 111 void *cookie, 112 void *handle, 113 u_register_t flags) 114 { 115 u_register_t x1 = x1_arg; 116 u_register_t x2 = x2_arg; 117 u_register_t x3 = x3_arg; 118 u_register_t x4 = x4_arg; 119 120 if (((smc_fid >> FUNCID_CC_SHIFT) & FUNCID_CC_MASK) == SMC_32) { 121 /* 32-bit SMC function, clear top parameter bits */ 122 123 x1 &= UINT32_MAX; 124 x2 &= UINT32_MAX; 125 x3 &= UINT32_MAX; 126 x4 &= UINT32_MAX; 127 } 128 129 /* 130 * Dispatch PSCI calls to PSCI SMC handler and return its return 131 * value 132 */ 133 if (is_psci_fid(smc_fid)) { 134 uint64_t ret; 135 136 #if ENABLE_RUNTIME_INSTRUMENTATION 137 138 /* 139 * Flush cache line so that even if CPU power down happens 140 * the timestamp update is reflected in memory. 141 */ 142 PMF_WRITE_TIMESTAMP(rt_instr_svc, 143 RT_INSTR_ENTER_PSCI, 144 PMF_CACHE_MAINT, 145 get_cpu_data(cpu_data_pmf_ts[CPU_DATA_PMF_TS0_IDX])); 146 #endif 147 148 ret = psci_smc_handler(smc_fid, x1, x2, x3, x4, 149 cookie, handle, flags); 150 151 #if ENABLE_RUNTIME_INSTRUMENTATION 152 PMF_CAPTURE_TIMESTAMP(rt_instr_svc, 153 RT_INSTR_EXIT_PSCI, 154 PMF_NO_CACHE_MAINT); 155 #endif 156 157 SMC_RET1(handle, ret); 158 } 159 160 #if SPM_MM 161 /* 162 * Dispatch SPM calls to SPM SMC handler and return its return 163 * value 164 */ 165 if (is_spm_mm_fid(smc_fid)) { 166 return spm_mm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 167 handle, flags); 168 } 169 #endif 170 171 #if defined(SPD_spmd) 172 /* 173 * Dispatch FFA calls to the FFA SMC handler implemented by the SPM 174 * dispatcher and return its return value 175 */ 176 if (is_ffa_fid(smc_fid)) { 177 return spmd_ffa_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 178 handle, flags); 179 } 180 #endif 181 182 #if SDEI_SUPPORT 183 if (is_sdei_fid(smc_fid)) { 184 return sdei_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 185 flags); 186 } 187 #endif 188 189 #if TRNG_SUPPORT 190 if (is_trng_fid(smc_fid)) { 191 return trng_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 192 flags); 193 } 194 #endif /* TRNG_SUPPORT */ 195 196 #if ERRATA_ABI_SUPPORT 197 if (is_errata_fid(smc_fid)) { 198 return errata_abi_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 199 handle, flags); 200 } 201 #endif /* ERRATA_ABI_SUPPORT */ 202 203 #if ENABLE_RME 204 205 if (is_rmmd_el3_fid(smc_fid)) { 206 return rmmd_rmm_el3_handler(smc_fid, x1, x2, x3, x4, cookie, 207 handle, flags); 208 } 209 210 if (is_rmi_fid(smc_fid)) { 211 return rmmd_rmi_handler(smc_fid, x1, x2, x3, x4, cookie, 212 handle, flags); 213 } 214 #endif 215 216 #if SMC_PCI_SUPPORT 217 if (is_pci_fid(smc_fid)) { 218 return pci_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 219 flags); 220 } 221 #endif 222 223 #if DRTM_SUPPORT 224 if (is_drtm_fid(smc_fid)) { 225 return drtm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 226 flags); 227 } 228 #endif /* DRTM_SUPPORT */ 229 230 #if LFA_SUPPORT 231 if (is_lfa_fid(smc_fid)) { 232 return lfa_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, flags); 233 } 234 #endif /* LFA_SUPPORT */ 235 236 237 switch (smc_fid) { 238 case ARM_STD_SVC_CALL_COUNT: 239 /* 240 * Return the number of Standard Service Calls. PSCI is the only 241 * standard service implemented; so return number of PSCI calls 242 */ 243 SMC_RET1(handle, PSCI_NUM_CALLS); 244 245 case ARM_STD_SVC_UID: 246 /* Return UID to the caller */ 247 SMC_UUID_RET(handle, arm_svc_uid); 248 249 case ARM_STD_SVC_VERSION: 250 /* Return the version of current implementation */ 251 SMC_RET2(handle, STD_SVC_VERSION_MAJOR, STD_SVC_VERSION_MINOR); 252 253 default: 254 VERBOSE("Unimplemented Standard Service Call: 0x%x \n", smc_fid); 255 SMC_RET1(handle, SMC_UNK); 256 } 257 } 258 259 /* Register Standard Service Calls as runtime service */ 260 DECLARE_RT_SVC( 261 std_svc, 262 263 OEN_STD_START, 264 OEN_STD_END, 265 SMC_TYPE_FAST, 266 std_svc_setup, 267 std_svc_smc_handler 268 ); 269