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/** @file
OVMF ACPI QEMU support
Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved.<BR>
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
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "AcpiPlatform.h"
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/QemuFwCfgLib.h>
BOOLEAN
QemuDetected (
VOID
)
{
if (!QemuFwCfgIsAvailable ()) {
return FALSE;
}
return TRUE;
}
STATIC
EFI_STATUS
EFIAPI
QemuInstallAcpiMadtTable (
IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol,
IN VOID *AcpiTableBuffer,
IN UINTN AcpiTableBufferSize,
OUT UINTN *TableKey
)
{
EFI_STATUS Status;
UINTN Count;
UINTN Loop;
EFI_ACPI_DESCRIPTION_HEADER *Hdr;
UINTN NewBufferSize;
EFI_ACPI_1_0_PROCESSOR_LOCAL_APIC_STRUCTURE *LocalApic;
QemuFwCfgSelectItem (QemuFwCfgItemSmpCpuCount);
Count = (UINTN) QemuFwCfgRead16 ();
ASSERT (Count >= 1);
if (Count == 1) {
//
// The pre-built MADT table covers the single CPU case
//
return InstallAcpiTable (
AcpiProtocol,
AcpiTableBuffer,
AcpiTableBufferSize,
TableKey
);
}
//
// We need to add additional Local APIC entries to the MADT
//
NewBufferSize = AcpiTableBufferSize + ((Count - 1) * sizeof (*LocalApic));
Hdr = (EFI_ACPI_DESCRIPTION_HEADER*) AllocatePool (NewBufferSize);
ASSERT (Hdr != NULL);
CopyMem (Hdr, AcpiTableBuffer, AcpiTableBufferSize);
LocalApic = (EFI_ACPI_1_0_PROCESSOR_LOCAL_APIC_STRUCTURE*)
(((UINT8*) Hdr) + AcpiTableBufferSize);
//
// Add Local APIC entries for the APs to the MADT
//
for (Loop = 1; Loop < Count; Loop++) {
LocalApic->Type = EFI_ACPI_1_0_PROCESSOR_LOCAL_APIC;
LocalApic->Length = sizeof (*LocalApic);
LocalApic->AcpiProcessorId = (UINT8) Loop;
LocalApic->ApicId = (UINT8) Loop;
LocalApic->Flags = 1;
LocalApic++;
}
Hdr->Length = (UINT32) NewBufferSize;
Status = InstallAcpiTable (AcpiProtocol, Hdr, NewBufferSize, TableKey);
FreePool (Hdr);
return Status;
}
EFI_STATUS
EFIAPI
QemuInstallAcpiTable (
IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol,
IN VOID *AcpiTableBuffer,
IN UINTN AcpiTableBufferSize,
OUT UINTN *TableKey
)
{
EFI_ACPI_DESCRIPTION_HEADER *Hdr;
EFI_ACPI_TABLE_INSTALL_ACPI_TABLE TableInstallFunction;
Hdr = (EFI_ACPI_DESCRIPTION_HEADER*) AcpiTableBuffer;
switch (Hdr->Signature) {
case EFI_ACPI_1_0_APIC_SIGNATURE:
TableInstallFunction = QemuInstallAcpiMadtTable;
break;
default:
TableInstallFunction = InstallAcpiTable;
}
return TableInstallFunction (
AcpiProtocol,
AcpiTableBuffer,
AcpiTableBufferSize,
TableKey
);
}
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