OvmfPkg/ResetSystemLib: factor out ResetShutdown()

[mirror_edk2.git] / OvmfPkg / Library / ResetSystemLib / ResetShutdown.c

diff --git a/OvmfPkg/Library/ResetSystemLib/ResetShutdown.c b/OvmfPkg/Library/ResetSystemLib/ResetShutdown.c
new file mode 100644 (file)
index 0000000..971d94f
--- /dev/null
+++ b/OvmfPkg/Library/ResetSystemLib/ResetShutdown.c
@@ -0,0 +1,51 @@
+/** @file\r
+  Reset System Library Shutdown API implementation for OVMF.\r
+\r
+  Copyright (C) 2020, Red Hat, Inc.\r
+  Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>\r
+  SPDX-License-Identifier: BSD-2-Clause-Patent\r
+**/\r
+\r
+#include <Base.h>                   // BIT13\r
+\r
+#include <Library/BaseLib.h>        // CpuDeadLoop()\r
+#include <Library/DebugLib.h>       // ASSERT()\r
+#include <Library/IoLib.h>          // IoOr16()\r
+#include <Library/PciLib.h>         // PciRead16()\r
+#include <Library/ResetSystemLib.h> // ResetShutdown()\r
+#include <OvmfPlatforms.h>          // OVMF_HOSTBRIDGE_DID\r
+\r
+/**\r
+  Calling this function causes the system to enter a power state equivalent\r
+  to the ACPI G2/S5 or G3 states.\r
+\r
+  System shutdown should not return, if it returns, it means the system does\r
+  not support shut down reset.\r
+**/\r
+VOID\r
+EFIAPI\r
+ResetShutdown (\r
+  VOID\r
+  )\r
+{\r
+  UINT16 AcpiPmBaseAddress;\r
+  UINT16 HostBridgeDevId;\r
+\r
+  AcpiPmBaseAddress = 0;\r
+  HostBridgeDevId = PciRead16 (OVMF_HOSTBRIDGE_DID);\r
+  switch (HostBridgeDevId) {\r
+  case INTEL_82441_DEVICE_ID:\r
+    AcpiPmBaseAddress = PIIX4_PMBA_VALUE;\r
+    break;\r
+  case INTEL_Q35_MCH_DEVICE_ID:\r
+    AcpiPmBaseAddress = ICH9_PMBASE_VALUE;\r
+    break;\r
+  default:\r
+    ASSERT (FALSE);\r
+    CpuDeadLoop ();\r
+  }\r
+\r
+  IoBitFieldWrite16 (AcpiPmBaseAddress + 4, 10, 13, 0);\r
+  IoOr16 (AcpiPmBaseAddress + 4, BIT13);\r
+  CpuDeadLoop ();\r
+}\r