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/pci_svc.h> 17 #include <services/rmmd_svc.h> 18 #include <services/sdei.h> 19 #include <services/spm_mm_svc.h> 20 #include <services/spmc_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 ENABLE_RME 66 if (rmmd_setup() != 0) { 67 ret = 1; 68 } 69 #endif 70 71 #if SDEI_SUPPORT 72 /* SDEI initialisation */ 73 sdei_init(); 74 #endif 75 76 trng_setup(); 77 78 return ret; 79 } 80 81 /* 82 * Top-level Standard Service SMC handler. This handler will in turn dispatch 83 * calls to PSCI SMC handler 84 */ 85 static uintptr_t std_svc_smc_handler(uint32_t smc_fid, 86 u_register_t x1, 87 u_register_t x2, 88 u_register_t x3, 89 u_register_t x4, 90 void *cookie, 91 void *handle, 92 u_register_t flags) 93 { 94 if (((smc_fid >> FUNCID_CC_SHIFT) & FUNCID_CC_MASK) == SMC_32) { 95 /* 32-bit SMC function, clear top parameter bits */ 96 97 x1 &= UINT32_MAX; 98 x2 &= UINT32_MAX; 99 x3 &= UINT32_MAX; 100 x4 &= UINT32_MAX; 101 } 102 103 /* 104 * Dispatch PSCI calls to PSCI SMC handler and return its return 105 * value 106 */ 107 if (is_psci_fid(smc_fid)) { 108 uint64_t ret; 109 110 #if ENABLE_RUNTIME_INSTRUMENTATION 111 112 /* 113 * Flush cache line so that even if CPU power down happens 114 * the timestamp update is reflected in memory. 115 */ 116 PMF_WRITE_TIMESTAMP(rt_instr_svc, 117 RT_INSTR_ENTER_PSCI, 118 PMF_CACHE_MAINT, 119 get_cpu_data(cpu_data_pmf_ts[CPU_DATA_PMF_TS0_IDX])); 120 #endif 121 122 ret = psci_smc_handler(smc_fid, x1, x2, x3, x4, 123 cookie, handle, flags); 124 125 #if ENABLE_RUNTIME_INSTRUMENTATION 126 PMF_CAPTURE_TIMESTAMP(rt_instr_svc, 127 RT_INSTR_EXIT_PSCI, 128 PMF_NO_CACHE_MAINT); 129 #endif 130 131 SMC_RET1(handle, ret); 132 } 133 134 #if SPM_MM 135 /* 136 * Dispatch SPM calls to SPM SMC handler and return its return 137 * value 138 */ 139 if (is_spm_mm_fid(smc_fid)) { 140 return spm_mm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 141 handle, flags); 142 } 143 #endif 144 145 #if defined(SPD_spmd) 146 /* 147 * Dispatch FFA calls to the FFA SMC handler implemented by the SPM 148 * dispatcher and return its return value 149 */ 150 if (is_ffa_fid(smc_fid)) { 151 return spmd_ffa_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 152 handle, flags); 153 } 154 #endif 155 156 #if SDEI_SUPPORT 157 if (is_sdei_fid(smc_fid)) { 158 return sdei_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 159 flags); 160 } 161 #endif 162 163 #if TRNG_SUPPORT 164 if (is_trng_fid(smc_fid)) { 165 return trng_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 166 flags); 167 } 168 #endif 169 #if ENABLE_RME 170 171 if (is_rmmd_el3_fid(smc_fid)) { 172 return rmmd_rmm_el3_handler(smc_fid, x1, x2, x3, x4, cookie, 173 handle, flags); 174 } 175 176 if (is_rmi_fid(smc_fid)) { 177 return rmmd_rmi_handler(smc_fid, x1, x2, x3, x4, cookie, 178 handle, flags); 179 } 180 #endif 181 182 #if SMC_PCI_SUPPORT 183 if (is_pci_fid(smc_fid)) { 184 return pci_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle, 185 flags); 186 } 187 #endif 188 189 switch (smc_fid) { 190 case ARM_STD_SVC_CALL_COUNT: 191 /* 192 * Return the number of Standard Service Calls. PSCI is the only 193 * standard service implemented; so return number of PSCI calls 194 */ 195 SMC_RET1(handle, PSCI_NUM_CALLS); 196 197 case ARM_STD_SVC_UID: 198 /* Return UID to the caller */ 199 SMC_UUID_RET(handle, arm_svc_uid); 200 201 case ARM_STD_SVC_VERSION: 202 /* Return the version of current implementation */ 203 SMC_RET2(handle, STD_SVC_VERSION_MAJOR, STD_SVC_VERSION_MINOR); 204 205 default: 206 VERBOSE("Unimplemented Standard Service Call: 0x%x \n", smc_fid); 207 SMC_RET1(handle, SMC_UNK); 208 } 209 } 210 211 /* Register Standard Service Calls as runtime service */ 212 DECLARE_RT_SVC( 213 std_svc, 214 215 OEN_STD_START, 216 OEN_STD_END, 217 SMC_TYPE_FAST, 218 std_svc_setup, 219 std_svc_smc_handler 220 ); 221