diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/edk2/MdePkg/Include/IndustryStandard/HighPrecisionEventTimerTable.h | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/MdePkg/Include/IndustryStandard/HighPrecisionEventTimerTable.h')
| -rw-r--r-- | roms/edk2/MdePkg/Include/IndustryStandard/HighPrecisionEventTimerTable.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Include/IndustryStandard/HighPrecisionEventTimerTable.h b/roms/edk2/MdePkg/Include/IndustryStandard/HighPrecisionEventTimerTable.h new file mode 100644 index 000000000..168770ff6 --- /dev/null +++ b/roms/edk2/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
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