diff options
Diffstat (limited to 'src/vendorcode/intel/edk2/edk2-stable202005/MdePkg/Include/IndustryStandard/HighPrecisionEventTimerTable.h')
| -rw-r--r-- | src/vendorcode/intel/edk2/edk2-stable202005/MdePkg/Include/IndustryStandard/HighPrecisionEventTimerTable.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/src/vendorcode/intel/edk2/edk2-stable202005/MdePkg/Include/IndustryStandard/HighPrecisionEventTimerTable.h b/src/vendorcode/intel/edk2/edk2-stable202005/MdePkg/Include/IndustryStandard/HighPrecisionEventTimerTable.h new file mode 100644 index 0000000000..d2bc6d57c4 --- /dev/null +++ b/src/vendorcode/intel/edk2/edk2-stable202005/MdePkg/Include/IndustryStandard/HighPrecisionEventTimerTable.h @@ -0,0 +1,62 @@ +/** @file + ACPI high precision event timer table definition, at www.intel.com + Specification name is IA-PC HPET (High Precision Event Timers) Specification. + + Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR> + SPDX-License-Identifier: BSD-2-Clause-Patent +**/ + +#ifndef _HIGH_PRECISION_EVENT_TIMER_TABLE_H_ +#define _HIGH_PRECISION_EVENT_TIMER_TABLE_H_ + +#include <IndustryStandard/Acpi.h> + +// +// Ensure proper structure formats +// +#pragma pack(1) + +/// +/// HPET Event Timer Block ID described in IA-PC HPET Specification, 3.2.4. +/// +typedef union { + struct { + UINT32 Revision : 8; + UINT32 NumberOfTimers : 5; + UINT32 CounterSize : 1; + UINT32 Reserved : 1; + UINT32 LegacyRoute : 1; + UINT32 VendorId : 16; + } Bits; + UINT32 Uint32; +} EFI_ACPI_HIGH_PRECISION_EVENT_TIMER_BLOCK_ID; + + +/// +/// High Precision Event Timer Table header definition. +/// +typedef struct { + EFI_ACPI_DESCRIPTION_HEADER Header; + UINT32 EventTimerBlockId; + EFI_ACPI_2_0_GENERIC_ADDRESS_STRUCTURE BaseAddressLower32Bit; + UINT8 HpetNumber; + UINT16 MainCounterMinimumClockTickInPeriodicMode; + UINT8 PageProtectionAndOemAttribute; +} EFI_ACPI_HIGH_PRECISION_EVENT_TIMER_TABLE_HEADER; + +/// +/// HPET Revision (defined in spec) +/// +#define EFI_ACPI_HIGH_PRECISION_EVENT_TIMER_TABLE_REVISION 0x01 + +// +// Page protection setting +// Values 3 through 15 are reserved for use by the specification +// +#define EFI_ACPI_NO_PAGE_PROTECTION 0 +#define EFI_ACPI_4KB_PAGE_PROTECTION 1 +#define EFI_ACPI_64KB_PAGE_PROTECTION 2 + +#pragma pack() + +#endif |