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/rmi_svc.h> 19 #include <services/rmmd_svc.h> 20 #include <services/sdei.h> 21 #include <services/spm_mm_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 return ret; 80 } 81 82 /* 83 * Top-level Standard Service SMC handler. This handler will in turn dispatch 84 * calls to PSCI SMC handler 85 */ 86 static uintptr_t std_svc_smc_handler(uint32_t smc_fid, 87 u_register_t x1, 88 u_register_t x2, 89 u_register_t x3, 90 u_register_t x4, 91 void *cookie, 92 void *handle, 93 u_register_t flags) 94 { 95 if (((smc_fid >> FUNCID_CC_SHIFT) & FUNCID_CC_MASK) == SMC_32) { 96 /* 32-bit SMC function, clear top parameter bits */ 97 98 x1 &= UINT32_MAX; 99 x2 &= UINT32_MAX; 100 x3 &= UINT32_MAX; 101 x4 &= UINT32_MAX; 102 } 103 104 /* 105 * Dispatch PSCI calls to PSCI SMC handler and return its return 106 * value 107 */ 108 if (is_psci_fid(smc_fid)) { 109 uint64_t ret; 110 111 #if ENABLE_RUNTIME_INSTRUMENTATION 112 113 /* 114 * Flush cache line so that even if CPU power down happens 115 * the timestamp update is reflected in memory. 116 */ 117 PMF_WRITE_TIMESTAMP(rt_instr_svc, 118 RT_INSTR_ENTER_PSCI, 119 PMF_CACHE_MAINT, 120 get_cpu_data(cpu_data_pmf_ts[CPU_DATA_PMF_TS0_IDX])); 121 #endif 122 123 ret = psci_smc_handler(smc_fid, x1, x2, x3, x4, 124 cookie, handle, flags); 125 126 #if ENABLE_RUNTIME_INSTRUMENTATION 127 PMF_CAPTURE_TIMESTAMP(rt_instr_svc, 128 RT_INSTR_EXIT_PSCI, 129 PMF_NO_CACHE_MAINT); 130 #endif 131 132 SMC_RET1(handle, ret); 133 } 134 135 #if SPM_MM 136 /* 137 * Dispatch SPM calls to SPM SMC handler and return its return 138 * value 139 */ 140 if (is_spm_mm_fid(smc_fid)) { 141 return spm_mm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 142 handle, flags); 143 } 144 #endif 145 146 #if defined(SPD_spmd) 147 /* 148 * Dispatch FFA calls to the FFA SMC handler implemented by the SPM 149 * dispatcher and return its return value 150 */ 151 if (is_ffa_fid(smc_fid)) { 152 return spmd_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 153 handle, flags); 154 } 155 #endif 156 157 #if SDEI_SUPPORT 158 if (is_sdei_fid(smc_fid)) { 159 return sdei_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 160 flags); 161 } 162 #endif 163 164 #if TRNG_SUPPORT 165 if (is_trng_fid(smc_fid)) { 166 return trng_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 167 flags); 168 } 169 #endif 170 #if ENABLE_RME 171 /* 172 * Granule transition service interface functions (GTSI) are allocated 173 * from the Std service range. Call the RMM dispatcher to handle calls. 174 */ 175 if (is_gtsi_fid(smc_fid)) { 176 return rmmd_gtsi_handler(smc_fid, x1, x2, x3, x4, cookie, 177 handle, flags); 178 } 179 180 if (is_rmi_fid(smc_fid)) { 181 return rmmd_rmi_handler(smc_fid, x1, x2, x3, x4, cookie, 182 handle, flags); 183 } 184 #endif 185 186 #if SMC_PCI_SUPPORT 187 if (is_pci_fid(smc_fid)) { 188 return pci_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 189 flags); 190 } 191 #endif 192 193 switch (smc_fid) { 194 case ARM_STD_SVC_CALL_COUNT: 195 /* 196 * Return the number of Standard Service Calls. PSCI is the only 197 * standard service implemented; so return number of PSCI calls 198 */ 199 SMC_RET1(handle, PSCI_NUM_CALLS); 200 201 case ARM_STD_SVC_UID: 202 /* Return UID to the caller */ 203 SMC_UUID_RET(handle, arm_svc_uid); 204 205 case ARM_STD_SVC_VERSION: 206 /* Return the version of current implementation */ 207 SMC_RET2(handle, STD_SVC_VERSION_MAJOR, STD_SVC_VERSION_MINOR); 208 209 default: 210 VERBOSE("Unimplemented Standard Service Call: 0x%x \n", smc_fid); 211 SMC_RET1(handle, SMC_UNK); 212 } 213 } 214 215 /* Register Standard Service Calls as runtime service */ 216 DECLARE_RT_SVC( 217 std_svc, 218 219 OEN_STD_START, 220 OEN_STD_END, 221 SMC_TYPE_FAST, 222 std_svc_setup, 223 std_svc_smc_handler 224 ); 225