1 /** @file
2 Reset System Library functions for PCAT platforms
3
4 Copyright (c) 2006 - 2009, 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
ResetCold(VOID)31 ResetCold (
32 VOID
33 )
34 {
35 IoWrite8 (0x64, 0xfe);
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
ResetWarm(VOID)47 ResetWarm (
48 VOID
49 )
50 {
51 IoWrite8 (0x64, 0xfe);
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
ResetShutdown(VOID)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
EnterS3WithImmediateWake(VOID)81 EnterS3WithImmediateWake (
82 VOID
83 )
84 {
85 ASSERT (FALSE);
86 }
87