1 /** @file 2 SMM CPU Service protocol definition. 3 4 Copyright (c) 2013 - 2015, Intel Corporation. All rights reserved.<BR> 5 This program and the accompanying materials 6 are licensed and made available under the terms and conditions of the BSD License 7 which accompanies this distribution. The full text of the license may be found at 8 http://opensource.org/licenses/bsd-license.php 9 10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 13 **/ 14 15 #ifndef _SMM_CPU_SERVICE_PROTOCOL_H_ 16 #define _SMM_CPU_SERVICE_PROTOCOL_H_ 17 18 // 19 // Share some definitions with MP Services and CPU Arch Protocol 20 // 21 #include <Protocol/MpService.h> 22 #include <Protocol/Cpu.h> 23 24 #define EFI_SMM_CPU_SERVICE_PROTOCOL_GUID \ 25 { \ 26 0x1d202cab, 0xc8ab, 0x4d5c, { 0x94, 0xf7, 0x3c, 0xfc, 0xc0, 0xd3, 0xd3, 0x35 } \ 27 } 28 29 typedef struct _EFI_SMM_CPU_SERVICE_PROTOCOL EFI_SMM_CPU_SERVICE_PROTOCOL; 30 31 // 32 // Protocol functions 33 // 34 35 /** 36 Gets processor information on the requested processor at the 37 instant this call is made. This service may only be called from the BSP. 38 39 @param[in] This A pointer to the EFI_SMM_CPU_SERVICE_PROTOCOL 40 instance. 41 @param[in] ProcessorNumber The handle number of processor. 42 @param[out] ProcessorInfoBuffer A pointer to the buffer where information for 43 the requested processor is deposited. 44 45 @retval EFI_SUCCESS Processor information was returned. 46 @retval EFI_DEVICE_ERROR The calling processor is an AP. 47 @retval EFI_INVALID_PARAMETER ProcessorInfoBuffer is NULL. 48 @retval EFI_NOT_FOUND The processor with the handle specified by 49 ProcessorNumber does not exist in the platform. 50 **/ 51 typedef 52 EFI_STATUS 53 (EFIAPI * EFI_SMM_GET_PROCESSOR_INFO) ( 54 IN CONST EFI_SMM_CPU_SERVICE_PROTOCOL *This, 55 IN UINTN ProcessorNumber, 56 OUT EFI_PROCESSOR_INFORMATION *ProcessorInfoBuffer 57 ); 58 59 /** 60 This service switches the requested AP to be the BSP from that point onward. 61 This service changes the BSP for all purposes. This call can only be performed 62 by the current BSP. 63 64 This service switches the requested AP to be the BSP from that point onward. 65 This service changes the BSP for all purposes. The new BSP can take over the 66 execution of the old BSP and continue seamlessly from where the old one left 67 off. 68 69 If the BSP cannot be switched prior to the return from this service, then 70 EFI_UNSUPPORTED must be returned. 71 72 @param[in] This A pointer to the EFI_SMM_CPU_SERVICE_PROTOCOL instance. 73 @param[in] ProcessorNumber The handle number of AP that is to become the new 74 BSP. The range is from 0 to the total number of 75 logical processors minus 1. 76 77 @retval EFI_SUCCESS BSP successfully switched. 78 @retval EFI_UNSUPPORTED Switching the BSP cannot be completed prior to 79 this service returning. 80 @retval EFI_UNSUPPORTED Switching the BSP is not supported. 81 @retval EFI_SUCCESS The calling processor is an AP. 82 @retval EFI_NOT_FOUND The processor with the handle specified by 83 ProcessorNumber does not exist. 84 @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the current BSP or 85 a disabled AP. 86 @retval EFI_NOT_READY The specified AP is busy. 87 88 **/ 89 typedef 90 EFI_STATUS 91 (EFIAPI * EFI_SMM_SWITCH_BSP) ( 92 IN CONST EFI_SMM_CPU_SERVICE_PROTOCOL *This, 93 IN UINTN ProcessorNumber 94 ); 95 96 /** 97 Notify that a new processor has been added to the system. 98 99 The SMM CPU driver should add the processor to the SMM CPU list. 100 101 If the processor is disabled it won't participate any SMI handler during subsequent SMIs. 102 103 @param This A pointer to the EFI_SMM_CPU_SERVICE_PROTOCOL instance. 104 @param ProcessorId The hardware ID of the processor. 105 @param ProcessorNumber The handle number of processor. 106 @param ProcessorResource A pointer to EFI_SMM_PROCESSOR_RESOURCE which holds the assigned resources. 107 108 @retval EFI_SUCCESS The function completed successfully. 109 @retval EFI_ALREADY_STARTED Processor already present. 110 @retval EFI_NOT_READY Space for a new handle could not be allocated. 111 112 **/ 113 typedef 114 EFI_STATUS 115 (EFIAPI *EFI_SMM_ADD_PROCESSOR) ( 116 IN CONST EFI_SMM_CPU_SERVICE_PROTOCOL *This, 117 IN UINT64 ProcessorId, 118 OUT UINTN *ProcessorNumber 119 ); 120 121 /** 122 Notify that a processor is hot-removed. 123 124 Remove a processor from the CPU list of the SMM CPU driver. After this API is called, the removed processor 125 must not respond to SMIs in the coherence domain. 126 127 @param This A pointer to the EFI_SMM_CPU_SERVICE_PROTOCOL instance. 128 @param ProcessorId The hardware ID of the processor. 129 130 @retval EFI_SUCCESS The function completed successfully. 131 @retval EFI_NOT_FOUND Processor with the hardware ID specified by ProcessorId does not exist. 132 @retval EFI_NOT_READY Specified AP is busy. 133 134 **/ 135 typedef 136 EFI_STATUS 137 (EFIAPI *EFI_SMM_REMOVE_PROCESSOR) ( 138 IN CONST EFI_SMM_CPU_SERVICE_PROTOCOL *This, 139 IN UINTN ProcessorNumber 140 ); 141 142 /** 143 This return the handle number for the calling processor. This service may be 144 called from the BSP and APs. 145 146 This service returns the processor handle number for the calling processor. 147 The returned value is in the range from 0 to the total number of logical 148 processors minus 1. This service may be called from the BSP and APs. 149 If ProcessorNumber is NULL, then EFI_INVALID_PARAMETER 150 is returned. Otherwise, the current processors handle number is returned in 151 ProcessorNumber, and EFI_SUCCESS is returned. 152 153 @param[in] This A pointer to the EFI_SMM_CPU_SERVICE_PROTOCOL instance. 154 @param[in] ProcessorNumber The handle number of AP that is to become the new 155 BSP. The range is from 0 to the total number of 156 logical processors minus 1. 157 158 @retval EFI_SUCCESS The current processor handle number was returned 159 in ProcessorNumber. 160 @retval EFI_INVALID_PARAMETER ProcessorNumber is NULL. 161 162 **/ 163 typedef 164 EFI_STATUS 165 (EFIAPI * EFI_SMM_WHOAMI) ( 166 IN CONST EFI_SMM_CPU_SERVICE_PROTOCOL *This, 167 OUT UINTN *ProcessorNumber 168 ); 169 170 /** 171 Register exception handler. 172 173 @param This A pointer to the SMM_CPU_SERVICE_PROTOCOL instance. 174 @param ExceptionType Defines which interrupt or exception to hook. Type EFI_EXCEPTION_TYPE and 175 the valid values for this parameter are defined in EFI_DEBUG_SUPPORT_PROTOCOL 176 of the UEFI 2.0 specification. 177 @param InterruptHandler A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER 178 that is called when a processor interrupt occurs. 179 If this parameter is NULL, then the handler will be uninstalled. 180 181 @retval EFI_SUCCESS The handler for the processor interrupt was successfully installed or uninstalled. 182 @retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler for InterruptType was previously installed. 183 @retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not previously installed. 184 @retval EFI_UNSUPPORTED The interrupt specified by InterruptType is not supported. 185 186 **/ 187 typedef 188 EFI_STATUS 189 (EFIAPI *EFI_SMM_REGISTER_EXCEPTION_HANDLER) ( 190 IN EFI_SMM_CPU_SERVICE_PROTOCOL *This, 191 IN EFI_EXCEPTION_TYPE ExceptionType, 192 IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler 193 ); 194 195 // 196 // This protocol provides CPU services from SMM. 197 // 198 struct _EFI_SMM_CPU_SERVICE_PROTOCOL { 199 EFI_SMM_GET_PROCESSOR_INFO GetProcessorInfo; 200 EFI_SMM_SWITCH_BSP SwitchBsp; 201 EFI_SMM_ADD_PROCESSOR AddProcessor; 202 EFI_SMM_REMOVE_PROCESSOR RemoveProcessor; 203 EFI_SMM_WHOAMI WhoAmI; 204 EFI_SMM_REGISTER_EXCEPTION_HANDLER RegisterExceptionHandler; 205 }; 206 207 extern EFI_GUID gEfiSmmCpuServiceProtocolGuid; 208 209 #endif 210
