| 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 - 2011, 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 |
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| 21 | VOID
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| 22 | AcpiPmControl (
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| 23 | UINTN SuspendType
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| 24 | )
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| 25 | {
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| 26 | ASSERT (SuspendType < 6);
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| 27 |
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| 28 | IoAndThenOr16 (0x404, (UINT16) ~0x3c00, (UINT16) (SuspendType << 10));
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| 29 | IoOr16 (0x404, BIT13);
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| 30 | CpuDeadLoop ();
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| 31 | }
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| 32 |
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| 33 | /**
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| 34 | Calling this function causes a system-wide reset. This sets
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| 35 | all circuitry within the system to its initial state. This type of reset
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| 36 | is asynchronous to system operation and operates without regard to
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| 37 | cycle boundaries.
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| 38 |
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| 39 | System reset should not return, if it returns, it means the system does
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| 40 | not support cold reset.
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| 41 | **/
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| 42 | VOID
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| 43 | EFIAPI
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| 44 | ResetCold (
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| 45 | VOID
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| 46 | )
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| 47 | {
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| 48 | IoWrite8 (0x64, 0xfe);
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| 49 | }
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| 50 |
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| 51 | /**
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| 52 | Calling this function causes a system-wide initialization. The processors
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| 53 | are set to their initial state, and pending cycles are not corrupted.
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| 54 |
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| 55 | System reset should not return, if it returns, it means the system does
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| 56 | not support warm reset.
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| 57 | **/
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| 58 | VOID
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| 59 | EFIAPI
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| 60 | ResetWarm (
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| 61 | VOID
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| 62 | )
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| 63 | {
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| 64 | IoWrite8 (0x64, 0xfe);
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| 65 | }
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| 66 |
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| 67 | /**
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| 68 | Calling this function causes the system to enter a power state equivalent
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| 69 | to the ACPI G2/S5 or G3 states.
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| 70 |
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| 71 | System shutdown should not return, if it returns, it means the system does
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| 72 | not support shut down reset.
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| 73 | **/
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| 74 | VOID
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| 75 | EFIAPI
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| 76 | ResetShutdown (
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| 77 | VOID
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| 78 | )
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| 79 | {
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| 80 | AcpiPmControl (0);
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| 81 | ASSERT (FALSE);
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| 82 | }
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| 83 |
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| 84 |
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| 85 | /**
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| 86 | Calling this function causes the system to enter a power state for capsule
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| 87 | update.
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| 88 |
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| 89 | Reset update should not return, if it returns, it means the system does
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| 90 | not support capsule update.
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| 91 |
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| 92 | **/
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| 93 | VOID
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| 94 | EFIAPI
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| 95 | EnterS3WithImmediateWake (
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| 96 | VOID
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| 97 | )
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| 98 | {
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| 99 | AcpiPmControl (1);
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| 100 | ASSERT (FALSE);
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| 101 | }
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