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git.proxmox.com Git - mirror_edk2.git/blob - OvmfPkg/Library/ResetSystemLib/ResetSystemLib.c
2 Reset System Library functions for OVMF
4 Copyright (c) 2006 - 2013, 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
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.
17 #include <Library/BaseLib.h>
18 #include <Library/DebugLib.h>
19 #include <Library/IoLib.h>
20 #include <Library/PcdLib.h>
21 #include <Library/TimerLib.h>
28 ASSERT (SuspendType
< 6);
30 IoBitFieldWrite16 (PcdGet16 (PcdAcpiPmBaseAddress
) + 4, 10, 13, (UINT16
) SuspendType
);
31 IoOr16 (PcdGet16 (PcdAcpiPmBaseAddress
) + 4, BIT13
);
36 Calling this function causes a system-wide reset. This sets
37 all circuitry within the system to its initial state. This type of reset
38 is asynchronous to system operation and operates without regard to
41 System reset should not return, if it returns, it means the system does
42 not support cold reset.
50 IoWrite8 (0xCF9, BIT2
| BIT1
); // 1st choice: PIIX3 RCR, RCPU|SRST
51 MicroSecondDelay (50);
53 IoWrite8 (0x64, 0xfe); // 2nd choice: keyboard controller
58 Calling this function causes a system-wide initialization. The processors
59 are set to their initial state, and pending cycles are not corrupted.
61 System reset should not return, if it returns, it means the system does
62 not support warm reset.
70 IoWrite8 (0x64, 0xfe);
75 Calling this function causes the system to enter a power state equivalent
76 to the ACPI G2/S5 or G3 states.
78 System shutdown should not return, if it returns, it means the system does
79 not support shut down reset.
93 Calling this function causes the system to enter a power state for capsule
96 Reset update should not return, if it returns, it means the system does
97 not support capsule update.
102 EnterS3WithImmediateWake (