1 /* 2 * Copyright (c) 2016-2019,2021, 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 (pmf_setup() != 0) { 26 return 1; 27 } 28 29 #if USE_DEBUGFS 30 31 if (debugfs_smc_setup() != 0) { 32 return 1; 33 } 34 35 #endif /* USE_DEBUGFS */ 36 37 return 0; 38 } 39 40 /* 41 * This function handles ARM defined SiP Calls 42 */ 43 static uintptr_t arm_sip_handler(unsigned int smc_fid, 44 u_register_t x1, 45 u_register_t x2, 46 u_register_t x3, 47 u_register_t x4, 48 void *cookie, 49 void *handle, 50 u_register_t flags) 51 { 52 int call_count = 0; 53 54 #if ENABLE_PMF 55 56 /* 57 * Dispatch PMF calls to PMF SMC handler and return its return 58 * value 59 */ 60 if (is_pmf_fid(smc_fid)) { 61 return pmf_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 62 handle, flags); 63 } 64 65 #endif /* ENABLE_PMF */ 66 67 #if USE_DEBUGFS 68 69 if (is_debugfs_fid(smc_fid)) { 70 return debugfs_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 71 handle, flags); 72 } 73 74 #endif /* USE_DEBUGFS */ 75 76 #if ARM_ETHOSN_NPU_DRIVER 77 78 if (is_ethosn_fid(smc_fid)) { 79 return ethosn_smc_handler(smc_fid, x1, x2, x3, x4, cookie, 80 handle, flags); 81 } 82 83 #endif /* ARM_ETHOSN_NPU_DRIVER */ 84 85 switch (smc_fid) { 86 case ARM_SIP_SVC_EXE_STATE_SWITCH: { 87 /* Execution state can be switched only if EL3 is AArch64 */ 88 #ifdef __aarch64__ 89 /* Allow calls from non-secure only */ 90 if (!is_caller_non_secure(flags)) 91 SMC_RET1(handle, STATE_SW_E_DENIED); 92 93 /* 94 * Pointers used in execution state switch are all 32 bits wide 95 */ 96 return (uintptr_t) arm_execution_state_switch(smc_fid, 97 (uint32_t) x1, (uint32_t) x2, (uint32_t) x3, 98 (uint32_t) x4, handle); 99 #else 100 /* State switch denied */ 101 SMC_RET1(handle, STATE_SW_E_DENIED); 102 #endif /* __aarch64__ */ 103 } 104 105 case ARM_SIP_SVC_CALL_COUNT: 106 /* PMF calls */ 107 call_count += PMF_NUM_SMC_CALLS; 108 109 #if ARM_ETHOSN_NPU_DRIVER 110 /* ETHOSN calls */ 111 call_count += ETHOSN_NUM_SMC_CALLS; 112 #endif /* ARM_ETHOSN_NPU_DRIVER */ 113 114 /* State switch call */ 115 call_count += 1; 116 117 SMC_RET1(handle, call_count); 118 119 case ARM_SIP_SVC_UID: 120 /* Return UID to the caller */ 121 SMC_UUID_RET(handle, arm_sip_svc_uid); 122 123 case ARM_SIP_SVC_VERSION: 124 /* Return the version of current implementation */ 125 SMC_RET2(handle, ARM_SIP_SVC_VERSION_MAJOR, ARM_SIP_SVC_VERSION_MINOR); 126 127 default: 128 WARN("Unimplemented ARM SiP Service Call: 0x%x \n", smc_fid); 129 SMC_RET1(handle, SMC_UNK); 130 } 131 132 } 133 134 135 /* Define a runtime service descriptor for fast SMC calls */ 136 DECLARE_RT_SVC( 137 arm_sip_svc, 138 OEN_SIP_START, 139 OEN_SIP_END, 140 SMC_TYPE_FAST, 141 arm_sip_setup, 142 arm_sip_handler 143 ); 144