diff options
Diffstat (limited to 'OvmfPkg/AcpiPlatformDxe')
| -rw-r--r-- | OvmfPkg/AcpiPlatformDxe/Qemu.c | 112 |
1 files changed, 108 insertions, 4 deletions
diff --git a/OvmfPkg/AcpiPlatformDxe/Qemu.c b/OvmfPkg/AcpiPlatformDxe/Qemu.c index 5ab89aa6c6..35d667fe3a 100644 --- a/OvmfPkg/AcpiPlatformDxe/Qemu.c +++ b/OvmfPkg/AcpiPlatformDxe/Qemu.c @@ -2,6 +2,9 @@ OVMF ACPI QEMU support
Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved.<BR>
+
+ Copyright (C) 2012, Red Hat, Inc.
+
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
@@ -196,6 +199,19 @@ typedef struct { PCI_WINDOW PciWindow64;
} FIRMWARE_DATA;
+typedef struct {
+ UINT8 NameOp;
+ UINT8 RootChar;
+ UINT8 NameChar[4];
+ UINT8 PackageOp;
+ UINT8 PkgLength;
+ UINT8 NumElements;
+ UINT8 DWordPrefix;
+ UINT8 Pm1aCntSlpTyp;
+ UINT8 Pm1bCntSlpTyp;
+ UINT8 Reserved[2];
+} SYSTEM_STATE_PACKAGE;
+
#pragma pack()
@@ -296,6 +312,80 @@ PopulateFwData( STATIC
+VOID
+EFIAPI
+GetSuspendStates (
+ UINTN *SuspendToRamSize,
+ SYSTEM_STATE_PACKAGE *SuspendToRam,
+ UINTN *SuspendToDiskSize,
+ SYSTEM_STATE_PACKAGE *SuspendToDisk
+ )
+{
+ STATIC CONST SYSTEM_STATE_PACKAGE Template = {
+ 0x08, // NameOp
+ '\\', // RootChar
+ { '_', 'S', 'x', '_' }, // NameChar[4]
+ 0x12, // PackageOp
+ 0x07, // PkgLength
+ 0x01, // NumElements
+ 0x0c, // DWordPrefix
+ 0x00, // Pm1aCntSlpTyp
+ 0x00, // Pm1bCntSlpTyp -- we don't support it
+ { 0x00, 0x00 } // Reserved
+ };
+ RETURN_STATUS Status;
+ FIRMWARE_CONFIG_ITEM FwCfgItem;
+ UINTN FwCfgSize;
+ UINT8 SystemStates[6];
+
+ //
+ // configure defaults
+ //
+ *SuspendToRamSize = sizeof Template;
+ CopyMem (SuspendToRam, &Template, sizeof Template);
+ SuspendToRam->NameChar[2] = '3'; // S3
+ SuspendToRam->Pm1aCntSlpTyp = 1; // PIIX4: STR
+
+ *SuspendToDiskSize = sizeof Template;
+ CopyMem (SuspendToDisk, &Template, sizeof Template);
+ SuspendToDisk->NameChar[2] = '4'; // S4
+ SuspendToDisk->Pm1aCntSlpTyp = 2; // PIIX4: POSCL
+
+ //
+ // check for overrides
+ //
+ Status = QemuFwCfgFindFile ("etc/system-states", &FwCfgItem, &FwCfgSize);
+ if (Status != RETURN_SUCCESS || FwCfgSize != sizeof SystemStates) {
+ DEBUG ((DEBUG_INFO, "ACPI using S3/S4 defaults\n"));
+ return;
+ }
+ QemuFwCfgSelectItem (FwCfgItem);
+ QemuFwCfgReadBytes (sizeof SystemStates, SystemStates);
+
+ //
+ // Each byte corresponds to a system state. In each byte, the MSB tells us
+ // whether the given state is enabled. If so, the three LSBs specify the
+ // value to be written to the PM control register's SUS_TYP bits.
+ //
+ if (SystemStates[3] & BIT7) {
+ SuspendToRam->Pm1aCntSlpTyp = SystemStates[3] & (BIT2 | BIT1 | BIT0);
+ DEBUG ((DEBUG_INFO, "ACPI S3 value: %d\n", SuspendToRam->Pm1aCntSlpTyp));
+ } else {
+ *SuspendToRamSize = 0;
+ DEBUG ((DEBUG_INFO, "ACPI S3 disabled\n"));
+ }
+
+ if (SystemStates[4] & BIT7) {
+ SuspendToDisk->Pm1aCntSlpTyp = SystemStates[4] & (BIT2 | BIT1 | BIT0);
+ DEBUG ((DEBUG_INFO, "ACPI S4 value: %d\n", SuspendToDisk->Pm1aCntSlpTyp));
+ } else {
+ *SuspendToDiskSize = 0;
+ DEBUG ((DEBUG_INFO, "ACPI S4 disabled\n"));
+ }
+}
+
+
+STATIC
EFI_STATUS
EFIAPI
QemuInstallAcpiSsdtTable (
@@ -312,10 +402,16 @@ QemuInstallAcpiSsdtTable ( FwData = AllocateReservedPool (sizeof (*FwData));
if (FwData != NULL) {
- UINTN SsdtSize;
- UINT8 *Ssdt;
-
- SsdtSize = AcpiTableBufferSize + 17;
+ UINTN SuspendToRamSize;
+ SYSTEM_STATE_PACKAGE SuspendToRam;
+ UINTN SuspendToDiskSize;
+ SYSTEM_STATE_PACKAGE SuspendToDisk;
+ UINTN SsdtSize;
+ UINT8 *Ssdt;
+
+ GetSuspendStates (&SuspendToRamSize, &SuspendToRam,
+ &SuspendToDiskSize, &SuspendToDisk);
+ SsdtSize = AcpiTableBufferSize + 17 + SuspendToRamSize + SuspendToDiskSize;
Ssdt = AllocatePool (SsdtSize);
if (Ssdt != NULL) {
@@ -352,6 +448,14 @@ QemuInstallAcpiSsdtTable ( *(UINT32*) SsdtPtr = sizeof (*FwData);
SsdtPtr += 4;
+ //
+ // add suspend system states
+ //
+ CopyMem (SsdtPtr, &SuspendToRam, SuspendToRamSize);
+ SsdtPtr += SuspendToRamSize;
+ CopyMem (SsdtPtr, &SuspendToDisk, SuspendToDiskSize);
+ SsdtPtr += SuspendToDiskSize;
+
ASSERT((UINTN) (SsdtPtr - Ssdt) == SsdtSize);
((EFI_ACPI_DESCRIPTION_HEADER *) Ssdt)->Length = (UINT32) SsdtSize;
Status = InstallAcpiTable (AcpiProtocol, Ssdt, SsdtSize, TableKey);
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