255b418415
Update MADT processing for QEMU to add additional Local APIC entries to the MADT. The MADT is still built with a single Local APIC entry. If the AcpiPlatformDxe driver determines that more processors are available, then additional Local APIC entries are added to the MADT at runtime. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jordan Justen <jordan.l.justen@intel.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13387 6f19259b-4bc3-4df7-8a09-765794883524
130 lines
3.5 KiB
C
130 lines
3.5 KiB
C
/** @file
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OVMF ACPI QEMU support
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Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "AcpiPlatform.h"
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#include <Library/BaseMemoryLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/QemuFwCfgLib.h>
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BOOLEAN
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QemuDetected (
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VOID
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)
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{
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if (!QemuFwCfgIsAvailable ()) {
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return FALSE;
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}
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return TRUE;
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}
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STATIC
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EFI_STATUS
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EFIAPI
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QemuInstallAcpiMadtTable (
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IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol,
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IN VOID *AcpiTableBuffer,
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IN UINTN AcpiTableBufferSize,
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OUT UINTN *TableKey
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)
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{
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EFI_STATUS Status;
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UINTN Count;
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UINTN Loop;
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EFI_ACPI_DESCRIPTION_HEADER *Hdr;
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UINTN NewBufferSize;
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EFI_ACPI_1_0_PROCESSOR_LOCAL_APIC_STRUCTURE *LocalApic;
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QemuFwCfgSelectItem (QemuFwCfgItemSmpCpuCount);
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Count = (UINTN) QemuFwCfgRead16 ();
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ASSERT (Count >= 1);
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if (Count == 1) {
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//
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// The pre-built MADT table covers the single CPU case
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//
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return InstallAcpiTable (
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AcpiProtocol,
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AcpiTableBuffer,
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AcpiTableBufferSize,
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TableKey
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);
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}
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//
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// We need to add additional Local APIC entries to the MADT
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//
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NewBufferSize = AcpiTableBufferSize + ((Count - 1) * sizeof (*LocalApic));
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Hdr = (EFI_ACPI_DESCRIPTION_HEADER*) AllocatePool (NewBufferSize);
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ASSERT (Hdr != NULL);
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CopyMem (Hdr, AcpiTableBuffer, AcpiTableBufferSize);
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LocalApic = (EFI_ACPI_1_0_PROCESSOR_LOCAL_APIC_STRUCTURE*)
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(((UINT8*) Hdr) + AcpiTableBufferSize);
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//
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// Add Local APIC entries for the APs to the MADT
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//
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for (Loop = 1; Loop < Count; Loop++) {
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LocalApic->Type = EFI_ACPI_1_0_PROCESSOR_LOCAL_APIC;
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LocalApic->Length = sizeof (*LocalApic);
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LocalApic->AcpiProcessorId = Loop;
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LocalApic->ApicId = Loop;
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LocalApic->Flags = 1;
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LocalApic++;
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}
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Hdr->Length = NewBufferSize;
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Status = InstallAcpiTable (AcpiProtocol, Hdr, NewBufferSize, TableKey);
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FreePool (Hdr);
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return Status;
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}
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EFI_STATUS
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EFIAPI
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QemuInstallAcpiTable (
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IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol,
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IN VOID *AcpiTableBuffer,
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IN UINTN AcpiTableBufferSize,
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OUT UINTN *TableKey
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)
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{
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EFI_ACPI_DESCRIPTION_HEADER *Hdr;
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EFI_ACPI_TABLE_INSTALL_ACPI_TABLE TableInstallFunction;
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Hdr = (EFI_ACPI_DESCRIPTION_HEADER*) AcpiTableBuffer;
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switch (Hdr->Signature) {
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case EFI_ACPI_1_0_APIC_SIGNATURE:
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TableInstallFunction = QemuInstallAcpiMadtTable;
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break;
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default:
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TableInstallFunction = InstallAcpiTable;
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}
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return TableInstallFunction (
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AcpiProtocol,
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AcpiTableBuffer,
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AcpiTableBufferSize,
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TableKey
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);
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}
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