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