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 trng_setup(); 78 79 #if DRTM_SUPPORT 80 if (drtm_setup() != 0) { 81 ret = 1; 82 } 83 #endif /* DRTM_SUPPORT */ 84 85 return ret; 86 } 87 88 /* 89 * Top-level Standard Service SMC handler. This handler will in turn dispatch 90 * calls to PSCI SMC handler 91 */ 92 static uintptr_t std_svc_smc_handler(uint32_t smc_fid, 93 u_register_t x1, 94 u_register_t x2, 95 u_register_t x3, 96 u_register_t x4, 97 void *cookie, 98 void *handle, 99 u_register_t flags) 100 { 101 if (((smc_fid >> FUNCID_CC_SHIFT) & FUNCID_CC_MASK) == SMC_32) { 102 /* 32-bit SMC function, clear top parameter bits */ 103 104 x1 &= UINT32_MAX; 105 x2 &= UINT32_MAX; 106 x3 &= UINT32_MAX; 107 x4 &= UINT32_MAX; 108 } 109 110 /* 111 * Dispatch PSCI calls to PSCI SMC handler and return its return 112 * value 113 */ 114 if (is_psci_fid(smc_fid)) { 115 uint64_t ret; 116 117 #if ENABLE_RUNTIME_INSTRUMENTATION 118 119 /* 120 * Flush cache line so that even if CPU power down happens 121 * the timestamp update is reflected in memory. 122 */ 123 PMF_WRITE_TIMESTAMP(rt_instr_svc, 124 RT_INSTR_ENTER_PSCI, 125 PMF_CACHE_MAINT, 126 get_cpu_data(cpu_data_pmf_ts[CPU_DATA_PMF_TS0_IDX])); 127 #endif 128 129 ret = psci_smc_handler(smc_fid, x1, x2, x3, x4, 130 cookie, handle, flags); 131 132 #if ENABLE_RUNTIME_INSTRUMENTATION 133 PMF_CAPTURE_TIMESTAMP(rt_instr_svc, 134 RT_INSTR_EXIT_PSCI, 135 PMF_NO_CACHE_MAINT); 136 #endif 137 138 SMC_RET1(handle, ret); 139 } 140 141 #if SPM_MM 142 /* 143 * Dispatch SPM calls to SPM SMC handler and return its return 144 * value 145 */ 146 if (is_spm_mm_fid(smc_fid)) { 147 return spm_mm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 148 handle, flags); 149 } 150 #endif 151 152 #if defined(SPD_spmd) 153 /* 154 * Dispatch FFA calls to the FFA SMC handler implemented by the SPM 155 * dispatcher and return its return value 156 */ 157 if (is_ffa_fid(smc_fid)) { 158 return spmd_ffa_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 159 handle, flags); 160 } 161 #endif 162 163 #if SDEI_SUPPORT 164 if (is_sdei_fid(smc_fid)) { 165 return sdei_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 166 flags); 167 } 168 #endif 169 170 #if TRNG_SUPPORT 171 if (is_trng_fid(smc_fid)) { 172 return trng_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 173 flags); 174 } 175 #endif 176 #if ENABLE_RME 177 178 if (is_rmmd_el3_fid(smc_fid)) { 179 return rmmd_rmm_el3_handler(smc_fid, x1, x2, x3, x4, cookie, 180 handle, flags); 181 } 182 183 if (is_rmi_fid(smc_fid)) { 184 return rmmd_rmi_handler(smc_fid, x1, x2, x3, x4, cookie, 185 handle, flags); 186 } 187 #endif 188 189 #if SMC_PCI_SUPPORT 190 if (is_pci_fid(smc_fid)) { 191 return pci_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 192 flags); 193 } 194 #endif 195 196 #if DRTM_SUPPORT 197 if (is_drtm_fid(smc_fid)) { 198 return drtm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 199 flags); 200 } 201 #endif /* DRTM_SUPPORT */ 202 203 switch (smc_fid) { 204 case ARM_STD_SVC_CALL_COUNT: 205 /* 206 * Return the number of Standard Service Calls. PSCI is the only 207 * standard service implemented; so return number of PSCI calls 208 */ 209 SMC_RET1(handle, PSCI_NUM_CALLS); 210 211 case ARM_STD_SVC_UID: 212 /* Return UID to the caller */ 213 SMC_UUID_RET(handle, arm_svc_uid); 214 215 case ARM_STD_SVC_VERSION: 216 /* Return the version of current implementation */ 217 SMC_RET2(handle, STD_SVC_VERSION_MAJOR, STD_SVC_VERSION_MINOR); 218 219 default: 220 VERBOSE("Unimplemented Standard Service Call: 0x%x \n", smc_fid); 221 SMC_RET1(handle, SMC_UNK); 222 } 223 } 224 225 /* Register Standard Service Calls as runtime service */ 226 DECLARE_RT_SVC( 227 std_svc, 228 229 OEN_STD_START, 230 OEN_STD_END, 231 SMC_TYPE_FAST, 232 std_svc_setup, 233 std_svc_smc_handler 234 ); 235