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/** @file
Simple wrapper functions and utility functions that access QEMU's modern CPU
hotplug register block.
These functions manipulate some of the registers described in
"docs/specs/acpi_cpu_hotplug.txt" in the QEMU source. IO Ports are accessed
via EFI_MM_CPU_IO_PROTOCOL. If a protocol call fails, these functions don't
return.
Copyright (c) 2020, Red Hat, Inc.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef QEMU_CPUHP_H_
#define QEMU_CPUHP_H_
#include <Protocol/MmCpuIo.h> // EFI_MM_CPU_IO_PROTOCOL
#include <Uefi/UefiBaseType.h> // EFI_STATUS
#include "ApicId.h" // APIC_ID
UINT32
QemuCpuhpReadCommandData2 (
IN CONST EFI_MM_CPU_IO_PROTOCOL *MmCpuIo
);
UINT8
QemuCpuhpReadCpuStatus (
IN CONST EFI_MM_CPU_IO_PROTOCOL *MmCpuIo
);
UINT32
QemuCpuhpReadCommandData (
IN CONST EFI_MM_CPU_IO_PROTOCOL *MmCpuIo
);
VOID
QemuCpuhpWriteCpuSelector (
IN CONST EFI_MM_CPU_IO_PROTOCOL *MmCpuIo,
IN UINT32 Selector
);
VOID
QemuCpuhpWriteCpuStatus (
IN CONST EFI_MM_CPU_IO_PROTOCOL *MmCpuIo,
IN UINT8 CpuStatus
);
VOID
QemuCpuhpWriteCommand (
IN CONST EFI_MM_CPU_IO_PROTOCOL *MmCpuIo,
IN UINT8 Command
);
EFI_STATUS
QemuCpuhpCollectApicIds (
IN CONST EFI_MM_CPU_IO_PROTOCOL *MmCpuIo,
IN UINT32 PossibleCpuCount,
IN UINT32 ApicIdCount,
OUT APIC_ID *PluggedApicIds,
OUT UINT32 *PluggedCount,
OUT APIC_ID *ToUnplugApicIds,
OUT UINT32 *ToUnplugSelectors,
OUT UINT32 *ToUnplugCount
);
#endif // QEMU_CPUHP_H_
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