1 /* 2 * Copyright (c) 2014-2022, 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/pci_svc.h> 18 #include <services/rmmd_svc.h> 19 #include <services/sdei.h> 20 #include <services/spm_mm_svc.h> 21 #include <services/spmc_svc.h> 22 #include <services/spmd_svc.h> 23 #include <services/std_svc.h> 24 #include <services/trng_svc.h> 25 #include <smccc_helpers.h> 26 #include <tools_share/uuid.h> 27 28 /* Standard Service UUID */ 29 static uuid_t arm_svc_uid = { 30 {0x5b, 0x90, 0x8d, 0x10}, 31 {0x63, 0xf8}, 32 {0xe8, 0x47}, 33 0xae, 0x2d, 34 {0xc0, 0xfb, 0x56, 0x41, 0xf6, 0xe2} 35 }; 36 37 /* Setup Standard Services */ 38 static int32_t std_svc_setup(void) 39 { 40 uintptr_t svc_arg; 41 int ret = 0; 42 43 svc_arg = get_arm_std_svc_args(PSCI_FID_MASK); 44 assert(svc_arg); 45 46 /* 47 * PSCI is one of the specifications implemented as a Standard Service. 48 * The `psci_setup()` also does EL3 architectural setup. 49 */ 50 if (psci_setup((const psci_lib_args_t *)svc_arg) != PSCI_E_SUCCESS) { 51 ret = 1; 52 } 53 54 #if SPM_MM 55 if (spm_mm_setup() != 0) { 56 ret = 1; 57 } 58 #endif 59 60 #if defined(SPD_spmd) 61 if (spmd_setup() != 0) { 62 ret = 1; 63 } 64 #endif 65 66 #if ENABLE_RME 67 if (rmmd_setup() != 0) { 68 ret = 1; 69 } 70 #endif 71 72 #if SDEI_SUPPORT 73 /* SDEI initialisation */ 74 sdei_init(); 75 #endif 76 77 #if TRNG_SUPPORT 78 /* TRNG initialisation */ 79 trng_setup(); 80 #endif /* TRNG_SUPPORT */ 81 82 #if DRTM_SUPPORT 83 if (drtm_setup() != 0) { 84 ret = 1; 85 } 86 #endif /* DRTM_SUPPORT */ 87 88 return ret; 89 } 90 91 /* 92 * Top-level Standard Service SMC handler. This handler will in turn dispatch 93 * calls to PSCI SMC handler 94 */ 95 static uintptr_t std_svc_smc_handler(uint32_t smc_fid, 96 u_register_t x1, 97 u_register_t x2, 98 u_register_t x3, 99 u_register_t x4, 100 void *cookie, 101 void *handle, 102 u_register_t flags) 103 { 104 if (((smc_fid >> FUNCID_CC_SHIFT) & FUNCID_CC_MASK) == SMC_32) { 105 /* 32-bit SMC function, clear top parameter bits */ 106 107 x1 &= UINT32_MAX; 108 x2 &= UINT32_MAX; 109 x3 &= UINT32_MAX; 110 x4 &= UINT32_MAX; 111 } 112 113 /* 114 * Dispatch PSCI calls to PSCI SMC handler and return its return 115 * value 116 */ 117 if (is_psci_fid(smc_fid)) { 118 uint64_t ret; 119 120 #if ENABLE_RUNTIME_INSTRUMENTATION 121 122 /* 123 * Flush cache line so that even if CPU power down happens 124 * the timestamp update is reflected in memory. 125 */ 126 PMF_WRITE_TIMESTAMP(rt_instr_svc, 127 RT_INSTR_ENTER_PSCI, 128 PMF_CACHE_MAINT, 129 get_cpu_data(cpu_data_pmf_ts[CPU_DATA_PMF_TS0_IDX])); 130 #endif 131 132 ret = psci_smc_handler(smc_fid, x1, x2, x3, x4, 133 cookie, handle, flags); 134 135 #if ENABLE_RUNTIME_INSTRUMENTATION 136 PMF_CAPTURE_TIMESTAMP(rt_instr_svc, 137 RT_INSTR_EXIT_PSCI, 138 PMF_NO_CACHE_MAINT); 139 #endif 140 141 SMC_RET1(handle, ret); 142 } 143 144 #if SPM_MM 145 /* 146 * Dispatch SPM calls to SPM SMC handler and return its return 147 * value 148 */ 149 if (is_spm_mm_fid(smc_fid)) { 150 return spm_mm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 151 handle, flags); 152 } 153 #endif 154 155 #if defined(SPD_spmd) 156 /* 157 * Dispatch FFA calls to the FFA SMC handler implemented by the SPM 158 * dispatcher and return its return value 159 */ 160 if (is_ffa_fid(smc_fid)) { 161 return spmd_ffa_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 162 handle, flags); 163 } 164 #endif 165 166 #if SDEI_SUPPORT 167 if (is_sdei_fid(smc_fid)) { 168 return sdei_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 169 flags); 170 } 171 #endif 172 173 #if TRNG_SUPPORT 174 if (is_trng_fid(smc_fid)) { 175 return trng_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 176 flags); 177 } 178 #endif /* TRNG_SUPPORT */ 179 180 #if ENABLE_RME 181 182 if (is_rmmd_el3_fid(smc_fid)) { 183 return rmmd_rmm_el3_handler(smc_fid, x1, x2, x3, x4, cookie, 184 handle, flags); 185 } 186 187 if (is_rmi_fid(smc_fid)) { 188 return rmmd_rmi_handler(smc_fid, x1, x2, x3, x4, cookie, 189 handle, flags); 190 } 191 #endif 192 193 #if SMC_PCI_SUPPORT 194 if (is_pci_fid(smc_fid)) { 195 return pci_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 196 flags); 197 } 198 #endif 199 200 #if DRTM_SUPPORT 201 if (is_drtm_fid(smc_fid)) { 202 return drtm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 203 flags); 204 } 205 #endif /* DRTM_SUPPORT */ 206 207 switch (smc_fid) { 208 case ARM_STD_SVC_CALL_COUNT: 209 /* 210 * Return the number of Standard Service Calls. PSCI is the only 211 * standard service implemented; so return number of PSCI calls 212 */ 213 SMC_RET1(handle, PSCI_NUM_CALLS); 214 215 case ARM_STD_SVC_UID: 216 /* Return UID to the caller */ 217 SMC_UUID_RET(handle, arm_svc_uid); 218 219 case ARM_STD_SVC_VERSION: 220 /* Return the version of current implementation */ 221 SMC_RET2(handle, STD_SVC_VERSION_MAJOR, STD_SVC_VERSION_MINOR); 222 223 default: 224 VERBOSE("Unimplemented Standard Service Call: 0x%x \n", smc_fid); 225 SMC_RET1(handle, SMC_UNK); 226 } 227 } 228 229 /* Register Standard Service Calls as runtime service */ 230 DECLARE_RT_SVC( 231 std_svc, 232 233 OEN_STD_START, 234 OEN_STD_END, 235 SMC_TYPE_FAST, 236 std_svc_setup, 237 std_svc_smc_handler 238 ); 239