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/*
* Copyright (c) 2020, Rebecca Cran <rebecca@bsdio.com>
* Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved.<BR>
* Copyright (C) 2012, Red Hat, Inc.
* Copyright (c) 2014, Pluribus Networks, Inc.
*
* SPDX-License-Identifier: BSD-2-Clause-Patent
*/
#include "AcpiPlatform.h"
#include <Library/BaseMemoryLib.h>
#include <Library/BhyveFwCtlLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/QemuFwCfgLib.h> // QemuFwCfgFindFile()
STATIC
EFI_STATUS
EFIAPI
BhyveGetCpuCount (
OUT UINT32 *CpuCount
)
{
FIRMWARE_CONFIG_ITEM Item;
UINTN Size;
if (QemuFwCfgIsAvailable ()) {
if (EFI_ERROR (QemuFwCfgFindFile ("opt/bhyve/hw.ncpu", &Item, &Size))) {
return EFI_NOT_FOUND;
} else if (Size != sizeof (*CpuCount)) {
return EFI_BAD_BUFFER_SIZE;
}
QemuFwCfgSelectItem (Item);
QemuFwCfgReadBytes (Size, CpuCount);
return EFI_SUCCESS;
}
//
// QemuFwCfg not available, try BhyveFwCtl.
//
Size = sizeof (*CpuCount);
if (BhyveFwCtlGet ("hw.ncpu", CpuCount, &Size) == RETURN_SUCCESS) {
return EFI_SUCCESS;
}
return EFI_UNSUPPORTED;
}
STATIC
EFI_STATUS
EFIAPI
BhyveInstallAcpiMadtTable (
IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol,
IN VOID *AcpiTableBuffer,
IN UINTN AcpiTableBufferSize,
OUT UINTN *TableKey
)
{
UINT32 CpuCount;
UINTN NewBufferSize;
EFI_ACPI_1_0_MULTIPLE_APIC_DESCRIPTION_TABLE_HEADER *Madt;
EFI_ACPI_1_0_PROCESSOR_LOCAL_APIC_STRUCTURE *LocalApic;
EFI_ACPI_1_0_IO_APIC_STRUCTURE *IoApic;
EFI_ACPI_1_0_INTERRUPT_SOURCE_OVERRIDE_STRUCTURE *Iso;
VOID *Ptr;
UINTN Loop;
EFI_STATUS Status;
ASSERT (AcpiTableBufferSize >= sizeof (EFI_ACPI_DESCRIPTION_HEADER));
// Query the host for the number of vCPUs
Status = BhyveGetCpuCount (&CpuCount);
if (!EFI_ERROR (Status)) {
DEBUG ((DEBUG_INFO, "Retrieved CpuCount %d\n", CpuCount));
ASSERT (CpuCount >= 1);
} else {
DEBUG ((DEBUG_INFO, "CpuCount retrieval error\n"));
CpuCount = 1;
}
NewBufferSize = 1 * sizeof (*Madt) +
CpuCount * sizeof (*LocalApic) +
1 * sizeof (*IoApic) +
1 * sizeof (*Iso);
Madt = AllocatePool (NewBufferSize);
if (Madt == NULL) {
return EFI_OUT_OF_RESOURCES;
}
CopyMem (&(Madt->Header), AcpiTableBuffer, sizeof (EFI_ACPI_DESCRIPTION_HEADER));
Madt->Header.Length = (UINT32)NewBufferSize;
Madt->LocalApicAddress = 0xFEE00000;
Madt->Flags = EFI_ACPI_1_0_PCAT_COMPAT;
Ptr = Madt + 1;
LocalApic = Ptr;
for (Loop = 0; Loop < CpuCount; ++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; // enabled
++LocalApic;
}
Ptr = LocalApic;
IoApic = Ptr;
IoApic->Type = EFI_ACPI_1_0_IO_APIC;
IoApic->Length = sizeof (*IoApic);
IoApic->IoApicId = (UINT8)CpuCount;
IoApic->Reserved = EFI_ACPI_RESERVED_BYTE;
IoApic->IoApicAddress = 0xFEC00000;
IoApic->SystemVectorBase = 0x00000000;
Ptr = IoApic + 1;
//
// IRQ0 (8254 Timer) => IRQ2 (PIC) Interrupt Source Override Structure
//
Iso = Ptr;
Iso->Type = EFI_ACPI_1_0_INTERRUPT_SOURCE_OVERRIDE;
Iso->Length = sizeof (*Iso);
Iso->Bus = 0x00; // ISA
Iso->Source = 0x00; // IRQ0
Iso->GlobalSystemInterruptVector = 0x00000002;
Iso->Flags = 0x0000; // Conforms to specs of the bus
Ptr = Iso + 1;
ASSERT ((UINTN)((UINT8 *)Ptr - (UINT8 *)Madt) == NewBufferSize);
Status = InstallAcpiTable (AcpiProtocol, Madt, NewBufferSize, TableKey);
FreePool (Madt);
return Status;
}
EFI_STATUS
EFIAPI
BhyveInstallAcpiTable (
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 = BhyveInstallAcpiMadtTable;
break;
default:
TableInstallFunction = InstallAcpiTable;
}
return TableInstallFunction (
AcpiProtocol,
AcpiTableBuffer,
AcpiTableBufferSize,
TableKey
);
}
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