1 /** @file 2 Reset System Library functions for PCAT platforms 3 4 Copyright (c) 2006 - 2016, 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 #include <Base.h> 16 17 #include <Library/DebugLib.h> 18 #include <Library/IoLib.h> 19 20 /** 21 Calling this function causes a system-wide reset. This sets 22 all circuitry within the system to its initial state. This type of reset 23 is asynchronous to system operation and operates without regard to 24 cycle boundaries. 25 26 System reset should not return, if it returns, it means the system does 27 not support cold reset. 28 **/ 29 VOID 30 EFIAPI 31 ResetCold ( 32 VOID 33 ) 34 { 35 IoWrite8 ((UINTN) PcdGet64 (PcdResetControlRegister), PcdGet8 (PcdResetControlValueColdReset)); 36 } 37 38 /** 39 Calling this function causes a system-wide initialization. The processors 40 are set to their initial state, and pending cycles are not corrupted. 41 42 System reset should not return, if it returns, it means the system does 43 not support warm reset. 44 **/ 45 VOID 46 EFIAPI 47 ResetWarm ( 48 VOID 49 ) 50 { 51 IoWrite8 ((UINTN) PcdGet64 (PcdResetControlRegister), PcdGet8 (PcdResetControlValueColdReset)); 52 } 53 54 /** 55 Calling this function causes the system to enter a power state equivalent 56 to the ACPI G2/S5 or G3 states. 57 58 System shutdown should not return, if it returns, it means the system does 59 not support shut down reset. 60 **/ 61 VOID 62 EFIAPI 63 ResetShutdown ( 64 VOID 65 ) 66 { 67 ASSERT (FALSE); 68 } 69 70 71 /** 72 Calling this function causes the system to enter a power state for capsule 73 update. 74 75 Reset update should not return, if it returns, it means the system does 76 not support capsule update. 77 78 **/ 79 VOID 80 EFIAPI 81 EnterS3WithImmediateWake ( 82 VOID 83 ) 84 { 85 ASSERT (FALSE); 86 } 87 88 /** 89 This function causes a systemwide reset. The exact type of the reset is 90 defined by the EFI_GUID that follows the Null-terminated Unicode string passed 91 into ResetData. If the platform does not recognize the EFI_GUID in ResetData 92 the platform must pick a supported reset type to perform.The platform may 93 optionally log the parameters from any non-normal reset that occurs. 94 95 @param[in] DataSize The size, in bytes, of ResetData. 96 @param[in] ResetData The data buffer starts with a Null-terminated string, 97 followed by the EFI_GUID. 98 **/ 99 VOID 100 EFIAPI 101 ResetPlatformSpecific ( 102 IN UINTN DataSize, 103 IN VOID *ResetData 104 ) 105 { 106 ResetCold (); 107 } 108
