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https://github.com/CloverHackyColor/CloverBootloader.git
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73 lines
1.7 KiB
Plaintext
73 lines
1.7 KiB
Plaintext
/*
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* Copyright (c) 2020, Rebecca Cran <rebecca@bsdio.com>
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* Copyright (c) 2014, Pluribus Networks, Inc.
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*
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* SPDX-License-Identifier: BSD-2-Clause-Patent
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*/
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#include <IndustryStandard/HighPrecisionEventTimerTable.h>
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#include "Platform.h"
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#define EFI_ACPI_HPET_DESCRIPTION_TABLE_SIGNATURE SIGNATURE_32('H', 'P', 'E', 'T')
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#define EFI_ACPI_OEM_TABLE_ID SIGNATURE_64('B','V','H','P','E','T',' ',' ')
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//
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// Ensure proper structure formats
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//
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#pragma pack (1)
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//
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// ACPI HPET structure
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//
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typedef struct {
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EFI_ACPI_HIGH_PRECISION_EVENT_TIMER_TABLE_HEADER Header;
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} EFI_ACPI_HIGH_PRECISION_EVENT_TIMER_DESCRIPTION_TABLE;
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#pragma pack ()
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//
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// HPET Description Table
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//
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EFI_ACPI_HIGH_PRECISION_EVENT_TIMER_DESCRIPTION_TABLE Hpet = {
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{
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{
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EFI_ACPI_HPET_DESCRIPTION_TABLE_SIGNATURE,
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sizeof (EFI_ACPI_HIGH_PRECISION_EVENT_TIMER_DESCRIPTION_TABLE),
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EFI_ACPI_HIGH_PRECISION_EVENT_TIMER_TABLE_REVISION,
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0x00, // Checksum will be updated at runtime
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{EFI_ACPI_OEM_ID},
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EFI_ACPI_OEM_TABLE_ID,
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EFI_ACPI_OEM_REVISION,
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EFI_ACPI_CREATOR_ID,
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EFI_ACPI_CREATOR_REVISION
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},
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//
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// HPET specific fields
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//
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0x0000A400, // EventTimerBlockId
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{
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EFI_ACPI_2_0_SYSTEM_MEMORY,
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0,
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0,
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EFI_ACPI_RESERVED_BYTE,
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0xFED00000,
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},
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0 // HpetNumber
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}
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};
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VOID*
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ReferenceAcpiTable (
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VOID
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)
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{
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//
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// Reference the table being generated to prevent the optimizer from removing the
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// data structure from the exeutable
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//
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return (VOID*)&Hpet;
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}
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