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