1 /* 2 * Copyright (c) 2016-2024, Arm Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <stdint.h> 8 9 #include <common/debug.h> 10 #include <common/runtime_svc.h> 11 #include <drivers/arm/ethosn.h> 12 #include <lib/debugfs.h> 13 #include <lib/pmf/pmf.h> 14 #include <plat/arm/common/arm_sip_svc.h> 15 #include <plat/arm/common/plat_arm.h> 16 #include <tools_share/uuid.h> 17 18 /* ARM SiP Service UUID */ 19 DEFINE_SVC_UUID2(arm_sip_svc_uid, 20 0x556d75e2, 0x6033, 0xb54b, 0xb5, 0x75, 21 0x62, 0x79, 0xfd, 0x11, 0x37, 0xff); 22 23 static int arm_sip_setup(void) 24 { 25 #if ENABLE_PMF 26 if (pmf_setup() != 0) { 27 return 1; 28 } 29 #endif /* ENABLE_PMF */ 30 31 #if USE_DEBUGFS 32 33 if (debugfs_smc_setup() != 0) { 34 return 1; 35 } 36 37 #endif /* USE_DEBUGFS */ 38 39 #if ETHOSN_NPU_DRIVER 40 41 if (ethosn_smc_setup() != 0) { 42 return 1; 43 } 44 45 #endif /* ETHOSN_NPU_DRIVER */ 46 47 return 0; 48 } 49 50 /* 51 * This function handles ARM defined SiP Calls 52 */ 53 static uintptr_t arm_sip_handler(unsigned int smc_fid, 54 u_register_t x1, 55 u_register_t x2, 56 u_register_t x3, 57 u_register_t x4, 58 void *cookie, 59 void *handle, 60 u_register_t flags) 61 { 62 int call_count = 0; 63 64 #if ENABLE_PMF 65 /* 66 * Dispatch PMF calls to PMF SMC handler and return its return 67 * value 68 */ 69 if (is_pmf_fid_deprecated(smc_fid)) { 70 NOTICE("PMF Interface usage from arm-sip range is deprecated. \ 71 Please migrate smc call to Vendor-specific el3 range.\n"); 72 return pmf_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 73 handle, flags); 74 } 75 76 #endif /* ENABLE_PMF */ 77 78 #if USE_DEBUGFS 79 if (is_debugfs_fid_deprecated(smc_fid)) { 80 NOTICE("Debugfs Interface usage from arm-sip range is deprecated. \ 81 Please migrate smc call to vendor-specific el3 range.\n"); 82 return debugfs_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 83 handle, flags); 84 } 85 86 #endif /* USE_DEBUGFS */ 87 88 #if ETHOSN_NPU_DRIVER 89 90 if (is_ethosn_fid(smc_fid)) { 91 return ethosn_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 92 handle, flags); 93 } 94 95 #endif /* ETHOSN_NPU_DRIVER */ 96 97 switch (smc_fid) { 98 case ARM_SIP_SVC_EXE_STATE_SWITCH: { 99 /* Execution state can be switched only if EL3 is AArch64 */ 100 #ifdef __aarch64__ 101 /* Allow calls from non-secure only */ 102 if (!is_caller_non_secure(flags)) 103 SMC_RET1(handle, STATE_SW_E_DENIED); 104 105 /* 106 * Pointers used in execution state switch are all 32 bits wide 107 */ 108 return (uintptr_t) arm_execution_state_switch(smc_fid, 109 (uint32_t) x1, (uint32_t) x2, (uint32_t) x3, 110 (uint32_t) x4, handle); 111 #else 112 /* State switch denied */ 113 SMC_RET1(handle, STATE_SW_E_DENIED); 114 #endif /* __aarch64__ */ 115 } 116 117 case ARM_SIP_SVC_CALL_COUNT: 118 /* PMF calls */ 119 call_count += PMF_NUM_SMC_CALLS; 120 121 #if ETHOSN_NPU_DRIVER 122 /* ETHOSN calls */ 123 call_count += ETHOSN_NUM_SMC_CALLS; 124 #endif /* ETHOSN_NPU_DRIVER */ 125 126 /* State switch call */ 127 call_count += 1; 128 129 SMC_RET1(handle, call_count); 130 131 case ARM_SIP_SVC_UID: 132 /* Return UID to the caller */ 133 SMC_UUID_RET(handle, arm_sip_svc_uid); 134 135 case ARM_SIP_SVC_VERSION: 136 /* Return the version of current implementation */ 137 SMC_RET2(handle, ARM_SIP_SVC_VERSION_MAJOR, ARM_SIP_SVC_VERSION_MINOR); 138 139 default: 140 break; 141 } 142 143 /* 144 * Fall back to allow Arm platform specific handler. 145 * TODO: Refactor needed to move out generic handlers from this file and 146 * only keep Arm Platform specific handlers here. 147 */ 148 return plat_arm_sip_handler(smc_fid, x1, x2, x3, x4, 149 cookie, handle, flags); 150 } 151 152 153 /* Define a runtime service descriptor for fast SMC calls */ 154 DECLARE_RT_SVC( 155 arm_sip_svc, 156 OEN_SIP_START, 157 OEN_SIP_END, 158 SMC_TYPE_FAST, 159 arm_sip_setup, 160 arm_sip_handler 161 ); 162