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1 | /** @file\r | |
2 | DXE Reset System Library Shutdown API implementation for OVMF.\r | |
3 | \r | |
4 | Copyright (C) 2020, Red Hat, Inc.\r | |
5 | Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>\r | |
6 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
7 | **/\r | |
8 | \r | |
9 | #include <Base.h> // BIT13\r | |
10 | \r | |
11 | #include <Library/BaseLib.h> // CpuDeadLoop()\r | |
12 | #include <Library/DebugLib.h> // ASSERT()\r | |
13 | #include <Library/IoLib.h> // IoOr16()\r | |
14 | #include <Library/PcdLib.h> // PcdGet16()\r | |
15 | #include <Library/ResetSystemLib.h> // ResetShutdown()\r | |
16 | #include <OvmfPlatforms.h> // PIIX4_PMBA_VALUE\r | |
17 | \r | |
18 | STATIC UINT16 mAcpiPmBaseAddress;\r | |
19 | \r | |
20 | EFI_STATUS\r | |
21 | EFIAPI\r | |
22 | DxeResetInit (\r | |
23 | IN EFI_HANDLE ImageHandle,\r | |
24 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
25 | )\r | |
26 | {\r | |
27 | UINT16 HostBridgeDevId;\r | |
28 | \r | |
29 | HostBridgeDevId = PcdGet16 (PcdOvmfHostBridgePciDevId);\r | |
30 | switch (HostBridgeDevId) {\r | |
31 | case INTEL_82441_DEVICE_ID:\r | |
32 | mAcpiPmBaseAddress = PIIX4_PMBA_VALUE;\r | |
33 | break;\r | |
34 | case INTEL_Q35_MCH_DEVICE_ID:\r | |
35 | mAcpiPmBaseAddress = ICH9_PMBASE_VALUE;\r | |
36 | break;\r | |
37 | default:\r | |
38 | ASSERT (FALSE);\r | |
39 | CpuDeadLoop ();\r | |
40 | return EFI_UNSUPPORTED;\r | |
41 | }\r | |
42 | \r | |
43 | return EFI_SUCCESS;\r | |
44 | }\r | |
45 | \r | |
46 | /**\r | |
47 | Calling this function causes the system to enter a power state equivalent\r | |
48 | to the ACPI G2/S5 or G3 states.\r | |
49 | \r | |
50 | System shutdown should not return, if it returns, it means the system does\r | |
51 | not support shut down reset.\r | |
52 | **/\r | |
53 | VOID\r | |
54 | EFIAPI\r | |
55 | ResetShutdown (\r | |
56 | VOID\r | |
57 | )\r | |
58 | {\r | |
59 | IoBitFieldWrite16 (mAcpiPmBaseAddress + 4, 10, 13, 0);\r | |
60 | IoOr16 (mAcpiPmBaseAddress + 4, BIT13);\r | |
61 | CpuDeadLoop ();\r | |
62 | }\r |