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3cbfba02 DW |
1 | /** @file\r |
2 | \r | |
3 | Copyright (c) 2004 - 2014, Intel Corporation. All rights reserved.<BR>\r | |
4 | \r\r | |
9dc8036d MK |
5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
6 | \r | |
3cbfba02 DW |
7 | \r\r |
8 | \r | |
9 | Module Name:\r | |
10 | \r | |
11 | \r | |
12 | IchTcoReset.c\r | |
13 | \r | |
14 | Abstract:\r | |
15 | Implements the programming of events in TCO Reset\r | |
16 | \r | |
17 | \r | |
18 | --*/\r | |
19 | \r | |
20 | #include "PlatformDxe.h"\r | |
21 | #include <Protocol/TcoReset.h>\r | |
22 | #include <Protocol/HwWatchdogTimer.h>\r | |
23 | \r | |
24 | \r | |
25 | EFI_STATUS\r | |
26 | EFIAPI\r | |
27 | EnableTcoReset (\r | |
28 | IN UINT32 *RcrbGcsSaveValue\r | |
29 | );\r | |
30 | \r | |
31 | EFI_STATUS\r | |
32 | EFIAPI\r | |
33 | DisableTcoReset (\r | |
34 | OUT UINT32 RcrbGcsRestoreValue\r | |
35 | );\r | |
36 | \r | |
37 | EFI_TCO_RESET_PROTOCOL mTcoResetProtocol = {\r | |
38 | EnableTcoReset,\r | |
39 | DisableTcoReset\r | |
40 | };\r | |
41 | \r | |
42 | /**\r | |
43 | \r | |
44 | Enables the TCO timer to reset the system in case of a system hang. This is\r | |
45 | used when writing the clock registers.\r | |
46 | \r | |
47 | @param RcrbGcsSaveValue This is the value of the RCRB GCS register before it is\r | |
48 | changed by this procedure. This will be used to restore\r | |
49 | the settings of this register in PpiDisableTcoReset.\r | |
50 | \r | |
51 | @retval EFI_STATUS\r | |
52 | \r | |
53 | **/\r | |
54 | EFI_STATUS\r | |
55 | EFIAPI\r | |
56 | EnableTcoReset (\r | |
57 | IN UINT32 *RcrbGcsSaveValue\r | |
58 | )\r | |
59 | {\r | |
60 | UINT16 TmpWord;\r | |
61 | UINT16 AcpiBase;\r | |
62 | EFI_WATCHDOG_TIMER_DRIVER_PROTOCOL *WatchdogTimerProtocol;\r | |
63 | EFI_STATUS Status;\r | |
64 | UINTN PbtnDisableInterval = 4; //Default value\r | |
65 | \r | |
66 | //\r | |
67 | // Get Watchdog Timer protocol.\r | |
68 | //\r | |
69 | Status = gBS->LocateProtocol (\r | |
70 | &gEfiWatchdogTimerDriverProtocolGuid,\r | |
71 | NULL,\r | |
72 | (VOID **)&WatchdogTimerProtocol\r | |
73 | );\r | |
74 | \r | |
75 | //\r | |
76 | // If the protocol is present, shut off the Timer as we enter BDS\r | |
77 | //\r | |
78 | if (!EFI_ERROR(Status)) {\r | |
79 | WatchdogTimerProtocol->RestartWatchdogTimer();\r | |
80 | WatchdogTimerProtocol->AllowKnownReset(TRUE);\r | |
81 | }\r | |
82 | \r | |
83 | if (*RcrbGcsSaveValue == 0) {\r | |
84 | PbtnDisableInterval = PcdGet32(PcdPBTNDisableInterval);\r | |
85 | } else {\r | |
86 | PbtnDisableInterval = *RcrbGcsSaveValue * 10 / 6;\r | |
87 | }\r | |
88 | \r | |
89 | //\r | |
90 | // Read ACPI Base Address\r | |
91 | //\r | |
92 | AcpiBase = PchLpcPciCfg16(R_PCH_LPC_ACPI_BASE) & B_PCH_LPC_ACPI_BASE_BAR;\r | |
93 | \r | |
94 | //\r | |
95 | // Stop TCO if not already stopped\r | |
96 | //\r | |
97 | TmpWord = IoRead16(AcpiBase + R_PCH_TCO_CNT);\r | |
98 | TmpWord |= B_PCH_TCO_CNT_TMR_HLT;\r | |
99 | IoWrite16(AcpiBase + R_PCH_TCO_CNT, TmpWord);\r | |
100 | \r | |
101 | //\r | |
102 | // Clear second TCO status\r | |
103 | //\r | |
104 | IoWrite32(AcpiBase + R_PCH_TCO_STS, B_PCH_TCO_STS_SECOND_TO);\r | |
105 | \r | |
106 | //\r | |
107 | // Enable reboot on TCO timeout\r | |
108 | //\r | |
109 | *RcrbGcsSaveValue = MmioRead32 (PMC_BASE_ADDRESS + R_PCH_PMC_PM_CFG);\r | |
110 | MmioAnd8 (PMC_BASE_ADDRESS + R_PCH_PMC_PM_CFG, (UINT8) ~B_PCH_PMC_PM_CFG_NO_REBOOT);\r | |
111 | \r | |
112 | //\r | |
113 | // Set TCO reload value (interval *.6s)\r | |
114 | //\r | |
115 | IoWrite32(AcpiBase + R_PCH_TCO_TMR, (UINT32)(PbtnDisableInterval<<16));\r | |
116 | \r | |
117 | //\r | |
118 | // Force TCO to load new value\r | |
119 | //\r | |
120 | IoWrite8(AcpiBase + R_PCH_TCO_RLD, 4);\r | |
121 | \r | |
122 | //\r | |
123 | // Clear second TCO status\r | |
124 | //\r | |
125 | IoWrite32(AcpiBase + R_PCH_TCO_STS, B_PCH_TCO_STS_SECOND_TO);\r | |
126 | \r | |
127 | //\r | |
128 | // Start TCO timer running\r | |
129 | //\r | |
130 | TmpWord = IoRead16(AcpiBase + R_PCH_TCO_CNT);\r | |
131 | TmpWord &= ~(B_PCH_TCO_CNT_TMR_HLT);\r | |
132 | IoWrite16(AcpiBase + R_PCH_TCO_CNT, TmpWord);\r | |
133 | \r | |
134 | return EFI_SUCCESS;\r | |
135 | }\r | |
136 | \r | |
137 | /**\r | |
138 | Disables the TCO timer. This is used after writing the clock registers.\r | |
139 | \r | |
140 | @param RcrbGcsRestoreValue Value saved in PpiEnableTcoReset so that it can\r | |
141 | restored.\r | |
142 | \r | |
143 | @retval EFI_STATUS\r | |
144 | \r | |
145 | **/\r | |
146 | EFI_STATUS\r | |
147 | EFIAPI\r | |
148 | DisableTcoReset (\r | |
149 | OUT UINT32 RcrbGcsRestoreValue\r | |
150 | )\r | |
151 | {\r | |
152 | UINT16 TmpWord;\r | |
153 | UINT16 AcpiBase;\r | |
154 | EFI_WATCHDOG_TIMER_DRIVER_PROTOCOL *WatchdogTimerProtocol;\r | |
155 | EFI_STATUS Status;\r | |
156 | \r | |
157 | //\r | |
158 | // Read ACPI Base Address\r | |
159 | //\r | |
160 | AcpiBase = PchLpcPciCfg16(R_PCH_LPC_ACPI_BASE) & B_PCH_LPC_ACPI_BASE_BAR;\r | |
161 | \r | |
162 | //\r | |
163 | // Stop the TCO timer\r | |
164 | //\r | |
165 | TmpWord = IoRead16(AcpiBase + R_PCH_TCO_CNT);\r | |
166 | TmpWord |= B_PCH_TCO_CNT_TMR_HLT;\r | |
167 | IoWrite16(AcpiBase + R_PCH_TCO_CNT, TmpWord);\r | |
168 | \r | |
169 | //\r | |
170 | // Get Watchdog Timer protocol.\r | |
171 | //\r | |
172 | Status = gBS->LocateProtocol (\r | |
173 | &gEfiWatchdogTimerDriverProtocolGuid,\r | |
174 | NULL,\r | |
175 | (VOID **)&WatchdogTimerProtocol\r | |
176 | );\r | |
177 | \r | |
178 | //\r | |
179 | // If the protocol is present, shut off the Timer as we enter BDS\r | |
180 | //\r | |
181 | if (!EFI_ERROR(Status)) {\r | |
182 | WatchdogTimerProtocol->AllowKnownReset(FALSE);\r | |
183 | }\r | |
184 | \r | |
185 | return EFI_SUCCESS;\r | |
186 | }\r | |
187 | \r | |
188 | /**\r | |
189 | \r | |
190 | Updates the feature policies according to the setup variable.\r | |
191 | \r | |
192 | @retval Returns VOID\r | |
193 | \r | |
194 | **/\r | |
195 | VOID\r | |
196 | InitTcoReset (\r | |
197 | )\r | |
198 | {\r | |
199 | EFI_HANDLE Handle;\r | |
200 | EFI_STATUS Status;\r | |
201 | \r | |
202 | Handle = NULL;\r | |
203 | Status = gBS->InstallProtocolInterface (\r | |
204 | &Handle,\r | |
205 | &gEfiTcoResetProtocolGuid,\r | |
206 | EFI_NATIVE_INTERFACE,\r | |
207 | &mTcoResetProtocol\r | |
208 | );\r | |
209 | ASSERT_EFI_ERROR(Status);\r | |
210 | \r | |
211 | }\r |