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