| Vishal Bhoj | 82c8071 | 2015-12-15 21:13:33 +0530 | [diff] [blame^] | 1 | /** @file
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| 2 | Reset System Library functions for OVMF
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| 3 |
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| 4 | Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
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| 5 | This program and the accompanying materials
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| 6 | are licensed and made available under the terms and conditions of the BSD License
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| 7 | which accompanies this distribution. The full text of the license may be found at
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| 8 | http://opensource.org/licenses/bsd-license.php
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| 9 |
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| 10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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| 11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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| 12 |
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| 13 | **/
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| 14 |
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| 15 | #include <Base.h>
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| 16 |
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| 17 | #include <Library/BaseLib.h>
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| 18 | #include <Library/DebugLib.h>
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| 19 | #include <Library/IoLib.h>
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| 20 | #include <Library/PcdLib.h>
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| 21 | #include <Library/TimerLib.h>
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| 22 |
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| 23 | VOID
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| 24 | AcpiPmControl (
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| 25 | UINTN SuspendType
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| 26 | )
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| 27 | {
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| 28 | ASSERT (SuspendType < 6);
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| 29 |
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| 30 | IoBitFieldWrite16 (PcdGet16 (PcdAcpiPmBaseAddress) + 4, 10, 13, (UINT16) SuspendType);
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| 31 | IoOr16 (PcdGet16 (PcdAcpiPmBaseAddress) + 4, BIT13);
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| 32 | CpuDeadLoop ();
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| 33 | }
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| 34 |
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| 35 | /**
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| 36 | Calling this function causes a system-wide reset. This sets
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| 37 | all circuitry within the system to its initial state. This type of reset
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| 38 | is asynchronous to system operation and operates without regard to
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| 39 | cycle boundaries.
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| 40 |
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| 41 | System reset should not return, if it returns, it means the system does
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| 42 | not support cold reset.
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| 43 | **/
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| 44 | VOID
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| 45 | EFIAPI
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| 46 | ResetCold (
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| 47 | VOID
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| 48 | )
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| 49 | {
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| 50 | IoWrite8 (0xCF9, BIT2 | BIT1); // 1st choice: PIIX3 RCR, RCPU|SRST
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| 51 | MicroSecondDelay (50);
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| 52 |
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| 53 | IoWrite8 (0x64, 0xfe); // 2nd choice: keyboard controller
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| 54 | CpuDeadLoop ();
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| 55 | }
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| 56 |
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| 57 | /**
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| 58 | Calling this function causes a system-wide initialization. The processors
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| 59 | are set to their initial state, and pending cycles are not corrupted.
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| 60 |
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| 61 | System reset should not return, if it returns, it means the system does
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| 62 | not support warm reset.
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| 63 | **/
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| 64 | VOID
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| 65 | EFIAPI
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| 66 | ResetWarm (
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| 67 | VOID
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| 68 | )
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| 69 | {
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| 70 | IoWrite8 (0x64, 0xfe);
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| 71 | CpuDeadLoop ();
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| 72 | }
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| 73 |
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| 74 | /**
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| 75 | Calling this function causes the system to enter a power state equivalent
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| 76 | to the ACPI G2/S5 or G3 states.
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| 77 |
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| 78 | System shutdown should not return, if it returns, it means the system does
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| 79 | not support shut down reset.
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| 80 | **/
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| 81 | VOID
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| 82 | EFIAPI
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| 83 | ResetShutdown (
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| 84 | VOID
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| 85 | )
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| 86 | {
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| 87 | AcpiPmControl (0);
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| 88 | ASSERT (FALSE);
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| 89 | }
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| 90 |
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| 91 |
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| 92 | /**
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| 93 | Calling this function causes the system to enter a power state for capsule
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| 94 | update.
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| 95 |
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| 96 | Reset update should not return, if it returns, it means the system does
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| 97 | not support capsule update.
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| 98 |
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| 99 | **/
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| 100 | VOID
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| 101 | EFIAPI
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| 102 | EnterS3WithImmediateWake (
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| 103 | VOID
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| 104 | )
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| 105 | {
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| 106 | AcpiPmControl (1);
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| 107 | ASSERT (FALSE);
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| 108 | }
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