1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
/** @file
Implements the programming of events in TCO Reset.
Copyright (c) 1999 - 2016, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "PlatformDxe.h"
#include <Protocol/TcoReset.h>
#include <Protocol/HwWatchdogTimer.h>
EFI_STATUS
EFIAPI
EnableTcoReset (
IN UINT32 *RcrbGcsSaveValue
);
EFI_STATUS
EFIAPI
DisableTcoReset (
OUT UINT32 RcrbGcsRestoreValue
);
EFI_TCO_RESET_PROTOCOL mTcoResetProtocol = {
EnableTcoReset,
DisableTcoReset
};
/**
Enables the TCO timer to reset the system in case of a system hang. This is
used when writing the clock registers.
@param[in] RcrbGcsSaveValue This is the value of the RCRB GCS register before it is
changed by this procedure. This will be used to restore
the settings of this register in PpiDisableTcoReset.
@retval EFI_STATUS
**/
EFI_STATUS
EFIAPI
EnableTcoReset (
IN UINT32 *RcrbGcsSaveValue
)
{
UINT16 TmpWord;
UINT16 AcpiBaseAddr;
EFI_WATCHDOG_TIMER_DRIVER_PROTOCOL *WatchdogTimerProtocol;
EFI_STATUS Status;
UINTN PbtnDisableInterval = 4; //Default value
//
// Get Watchdog Timer protocol.
//
Status = gBS->LocateProtocol (&gEfiWatchdogTimerDriverProtocolGuid, NULL, (VOID **) &WatchdogTimerProtocol);
//
// If the protocol is present, shut off the Timer as we enter BDS
//
if (!EFI_ERROR (Status)) {
WatchdogTimerProtocol->RestartWatchdogTimer ();
WatchdogTimerProtocol->AllowKnownReset (TRUE);
}
if (*RcrbGcsSaveValue == 0) {
PbtnDisableInterval = PcdGet32 (PcdPBTNDisableInterval);
} else {
PbtnDisableInterval = *RcrbGcsSaveValue * 10 / 6;
}
//
// Read ACPI Base Address
//
AcpiBaseAddr = (UINT16) PcdGet16 (PcdScAcpiIoPortBaseAddress);
//
// Stop TCO if not already stopped
//
TmpWord = IoRead16 (AcpiBaseAddr + R_TCO_CNT);
TmpWord |= B_TCO_CNT_TMR_HLT;
IoWrite16 (AcpiBaseAddr + R_TCO_CNT, TmpWord);
//
// Clear second TCO status
//
IoWrite32 (AcpiBaseAddr + R_TCO_STS, B_TCO_STS_SECOND_TO);
//
// Enable reboot on TCO timeout
//
*RcrbGcsSaveValue = MmioRead32 (PMC_BASE_ADDRESS + R_PMC_PM_CFG);
MmioAnd8 (PMC_BASE_ADDRESS + R_PMC_PM_CFG, (UINT8) ~B_PMC_PM_CFG_NO_REBOOT);
//
// Set TCO reload value (interval *.6s)
//
IoWrite32 (AcpiBaseAddr + R_TCO_TMR, (UINT32) (PbtnDisableInterval << 16));
//
// Force TCO to load new value
//
IoWrite8 (AcpiBaseAddr + R_TCO_RLD, 4);
//
// Clear second TCO status
//
IoWrite32 (AcpiBaseAddr + R_TCO_STS, B_TCO_STS_SECOND_TO);
//
// Start TCO timer running
//
TmpWord = IoRead16 (AcpiBaseAddr + R_TCO_CNT);
TmpWord &= ~(B_TCO_CNT_TMR_HLT);
IoWrite16 (AcpiBaseAddr + R_TCO_CNT, TmpWord);
//
// Clear Sleep Type Enable
//
IoWrite16 (AcpiBaseAddr + R_SMI_EN,
(UINT16) (IoRead16 (AcpiBaseAddr + R_SMI_EN) & (~B_SMI_EN_ON_SLP_EN)));
return EFI_SUCCESS;
}
/**
Disables the TCO timer.
This is used after writing the clock registers.
@param[out] RcrbGcsRestoreValue Value saved in PpiEnableTcoReset so that it can restored.
@retval EFI_STATUS
**/
EFI_STATUS
EFIAPI
DisableTcoReset (
OUT UINT32 RcrbGcsRestoreValue
)
{
UINT16 TmpWord;
UINT16 AcpiBaseAddr;
EFI_WATCHDOG_TIMER_DRIVER_PROTOCOL *WatchdogTimerProtocol;
EFI_STATUS Status;
//
// Read ACPI Base Address
//
AcpiBaseAddr = (UINT16) PcdGet16 (PcdScAcpiIoPortBaseAddress);
//
// Stop the TCO timer
//
TmpWord = IoRead16 (AcpiBaseAddr + R_TCO_CNT);
TmpWord |= B_TCO_CNT_TMR_HLT;
IoWrite16 (AcpiBaseAddr + R_TCO_CNT, TmpWord);
//
// Get Watchdog Timer protocol.
//
Status = gBS->LocateProtocol (&gEfiWatchdogTimerDriverProtocolGuid, NULL, (VOID **) &WatchdogTimerProtocol);
//
// If the protocol is present, shut off the Timer as we enter BDS
//
if (!EFI_ERROR (Status)) {
WatchdogTimerProtocol->AllowKnownReset (FALSE);
}
return EFI_SUCCESS;
}
VOID
InitTcoReset (
)
{
EFI_HANDLE Handle;
EFI_STATUS Status;
Handle = NULL;
Status = gBS->InstallProtocolInterface (
&Handle,
&gEfiTcoResetProtocolGuid,
EFI_NATIVE_INTERFACE,
&mTcoResetProtocol
);
ASSERT_EFI_ERROR (Status);
}
|
