projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| b6d542e9 LE |
1 | /** @file\r |
| 2 | 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/PciLib.h> // PciRead16()\r | |
| 15 | #include <Library/ResetSystemLib.h> // ResetShutdown()\r | |
| 16 | #include <OvmfPlatforms.h> // OVMF_HOSTBRIDGE_DID\r | |
| 17 | \r | |
| 18 | /**\r | |
| 19 | Calling this function causes the system to enter a power state equivalent\r | |
| 20 | to the ACPI G2/S5 or G3 states.\r | |
| 21 | \r | |
| 22 | System shutdown should not return, if it returns, it means the system does\r | |
| 23 | not support shut down reset.\r | |
| 24 | **/\r | |
| 25 | VOID\r | |
| 26 | EFIAPI\r | |
| 27 | ResetShutdown (\r | |
| 28 | VOID\r | |
| 29 | )\r | |
| 30 | {\r | |
| 31 | UINT16 AcpiPmBaseAddress;\r | |
| 32 | UINT16 HostBridgeDevId;\r | |
| 33 | \r | |
| 34 | AcpiPmBaseAddress = 0;\r | |
| 35 | HostBridgeDevId = PciRead16 (OVMF_HOSTBRIDGE_DID);\r | |
| 36 | switch (HostBridgeDevId) {\r | |
| 37 | case INTEL_82441_DEVICE_ID:\r | |
| 38 | AcpiPmBaseAddress = PIIX4_PMBA_VALUE;\r | |
| 39 | break;\r | |
| 40 | case INTEL_Q35_MCH_DEVICE_ID:\r | |
| 41 | AcpiPmBaseAddress = ICH9_PMBASE_VALUE;\r | |
| 42 | break;\r | |
| 43 | default:\r | |
| 44 | ASSERT (FALSE);\r | |
| 45 | CpuDeadLoop ();\r | |
| 46 | }\r | |
| 47 | \r | |
| 48 | IoBitFieldWrite16 (AcpiPmBaseAddress + 4, 10, 13, 0);\r | |
| 49 | IoOr16 (AcpiPmBaseAddress + 4, BIT13);\r | |
| 50 | CpuDeadLoop ();\r | |
| 51 | }\r |