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1 /** @file
2   Reset System Library functions for OVMF
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/BaseLib.h>
18 #include <Library/DebugLib.h>
19 #include <Library/IoLib.h>
20 #include <Library/TimerLib.h>
21 #include <OvmfPlatforms.h>
22 
23 #include <OvmfPlatforms.h>
24 
25 VOID
AcpiPmControl(UINTN SuspendType)26 AcpiPmControl (
27   UINTN SuspendType
28   )
29 {
30   UINT16 AcpiPmBaseAddress;
31   UINT16 HostBridgeDevId;
32 
33   ASSERT (SuspendType < 6);
34 
35   AcpiPmBaseAddress = 0;
36   HostBridgeDevId = PciRead16 (OVMF_HOSTBRIDGE_DID);
37   switch (HostBridgeDevId) {
38   case INTEL_82441_DEVICE_ID:
39     AcpiPmBaseAddress = PIIX4_PMBA_VALUE;
40     break;
41   case INTEL_Q35_MCH_DEVICE_ID:
42     AcpiPmBaseAddress = ICH9_PMBASE_VALUE;
43     break;
44   default:
45     ASSERT (FALSE);
46     CpuDeadLoop ();
47   }
48 
49   IoBitFieldWrite16 (AcpiPmBaseAddress + 4, 10, 13, (UINT16) SuspendType);
50   IoOr16 (AcpiPmBaseAddress + 4, BIT13);
51   CpuDeadLoop ();
52 }
53 
54 /**
55   Calling this function causes a system-wide reset. This sets
56   all circuitry within the system to its initial state. This type of reset
57   is asynchronous to system operation and operates without regard to
58   cycle boundaries.
59 
60   System reset should not return, if it returns, it means the system does
61   not support cold reset.
62 **/
63 VOID
64 EFIAPI
ResetCold(VOID)65 ResetCold (
66   VOID
67   )
68 {
69   IoWrite8 (0xCF9, BIT2 | BIT1); // 1st choice: PIIX3 RCR, RCPU|SRST
70   MicroSecondDelay (50);
71 
72   IoWrite8 (0x64, 0xfe);         // 2nd choice: keyboard controller
73   CpuDeadLoop ();
74 }
75 
76 /**
77   Calling this function causes a system-wide initialization. The processors
78   are set to their initial state, and pending cycles are not corrupted.
79 
80   System reset should not return, if it returns, it means the system does
81   not support warm reset.
82 **/
83 VOID
84 EFIAPI
ResetWarm(VOID)85 ResetWarm (
86   VOID
87   )
88 {
89   IoWrite8 (0x64, 0xfe);
90   CpuDeadLoop ();
91 }
92 
93 /**
94   Calling this function causes the system to enter a power state equivalent
95   to the ACPI G2/S5 or G3 states.
96 
97   System shutdown should not return, if it returns, it means the system does
98   not support shut down reset.
99 **/
100 VOID
101 EFIAPI
ResetShutdown(VOID)102 ResetShutdown (
103   VOID
104   )
105 {
106   AcpiPmControl (0);
107   ASSERT (FALSE);
108 }
109 
110 
111 /**
112   Calling this function causes the system to enter a power state for capsule
113   update.
114 
115   Reset update should not return, if it returns, it means the system does
116   not support capsule update.
117 
118 **/
119 VOID
120 EFIAPI
EnterS3WithImmediateWake(VOID)121 EnterS3WithImmediateWake (
122   VOID
123   )
124 {
125   AcpiPmControl (1);
126   ASSERT (FALSE);
127 }
128 
129 /**
130   This function causes a systemwide reset. The exact type of the reset is
131   defined by the EFI_GUID that follows the Null-terminated Unicode string passed
132   into ResetData. If the platform does not recognize the EFI_GUID in ResetData
133   the platform must pick a supported reset type to perform.The platform may
134   optionally log the parameters from any non-normal reset that occurs.
135 
136   @param[in]  DataSize   The size, in bytes, of ResetData.
137   @param[in]  ResetData  The data buffer starts with a Null-terminated string,
138                          followed by the EFI_GUID.
139 **/
140 VOID
141 EFIAPI
ResetPlatformSpecific(IN UINTN DataSize,IN VOID * ResetData)142 ResetPlatformSpecific (
143   IN UINTN   DataSize,
144   IN VOID    *ResetData
145   )
146 {
147   ResetCold ();
148 }
149