Leaked source code of windows server 2003
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4.4 KiB

/*++
Copyright (c) 2000 Microsoft Corporation
Module Name:
mmTimer.h
Abstract:
This module contains multimedia event timer definitions
Author:
Eric Nelson (enelson) July 7, 2000
Revision History:
--*/
#ifndef __MMTIMER_H__
#define __MMTIMER_H__
#define ETDT_SIGNATURE 0x54445445 // "ETDT"
//
// Event Timer Description Table
//
typedef struct _EVENT_TIMER_DESCRIPTION_TABLE {
DESCRIPTION_HEADER Header;
//
// Hardware ID of Event Timer Block:
// Contents of General_Cap & ID Reg of Timer Block
// [31:16] = PCI Vendor ID of 1st Timer Block
// [5] = Legacy IRQ Routing Capable
// [14] = Reserved
// [12:8] = Number of Comparitors in 1st Timer Block
// [7:0] = Hardware Rev ID
//
ULONG EventTimerBlockID;
//
// Base address of Event Timer Block
//
// Each Event Timer Block consumes 1K of system memory,
// regardless of how many comparators are actually implemented
// by hardware
//
ULONG BaseAddress;
} EVENT_TIMER_DESCRIPTION_TABLE, *PEVENT_TIMER_DESCRIPTION_TABLE;
#define ANYSIZE_ARRAY 1
#define ON 1
#define OFF 0
//
// Define volatile pointer offsets for easy access of event timer
// registers
//
typedef struct _TIMER_REGISTERS {
volatile ULONG ConfigCapabilities; // 0x100, 0x120, 0x140, ...
ULONG Unknown;
volatile ULONG Comparator; // 0x108
ULONG Mystery;
volatile ULONG FSBInterruptRoute; // 0x110
volatile ULONG FSBInterruptAddress; // 0x114
ULONGLONG Secret;
} TIMER_REGISTERS, *PTIMER_REGISTERS;
//
// Don't try to allocate one of these puppies, it's just a collecton of
// volatile pointer/offsets to make reading of registers easier
//
typedef struct _EVENT_TIMER_BLOCK {
volatile ULONG GeneralCapabilities; // 0x000
volatile ULONG ClockPeriod; // 0x004
ULONGLONG Unknown;
volatile ULONG GeneralConfig; // 0x010
ULONG Mystery[3];
volatile ULONG GeneralIRQStatus; // 0x020
ULONG Secret[51];
volatile ULONG MainCounter; // 0x0F0
ULONG Abyss[3];
TIMER_REGISTERS mmTimer[ANYSIZE_ARRAY]; // 0x100
} EVENT_TIMER_BLOCK, *PEVENT_TIMER_BLOCK;
//
// Define our multi media event timer block context
//
typedef struct _ETB_CONTEXT {
ULONG TimerCount;
PEVENT_TIMER_BLOCK EventTimer;
PHYSICAL_ADDRESS BaseAddress;
ULONG ClockPeriod; // In nanoseconds
ULONG SystemClockFrequency; // Rate of system clock in Hz
ULONG SystemClockTicks; // Period of system clock in ticks
BOOLEAN Initialized;
BOOLEAN NewClockFrequency;
} ETB_CONTEXT, *PETB_CONTEXT;
//
// General Capabilities and ID
//
typedef union {
struct {
ULONG RevisionID: 8;
ULONG TimerCount: 5;
ULONG MainCounterSize: 1;
ULONG Reserved: 1;
ULONG LegacyIRQRoutingCapable: 1;
ULONG VendorID: 16;
};
ULONG AsULONG;
} ETB_GEN_CAP_ID, *PETB_GEN_CAP_ID;
//
// General Configuration
//
typedef union {
struct {
ULONG GlobalIRQEnable: 1;
ULONG LegacyIRQRouteEnable: 1;
ULONG Reserved: 30;
};
ULONG AsULONG;
} ETB_GEN_CONF, *PETB_GEN_CONF;
//
// Timer n Configuration and Capabilities
//
typedef union {
struct {
ULONG Reserved0: 1;
ULONG EdgeLevelSelect: 1;
ULONG IRQEnable: 1;
ULONG PeriodicModeEnable: 1;
ULONG PeriodicCapable: 1;
ULONG CompareWidth: 1;
ULONG ValueSetConfig: 1;
ULONG Reserved1: 1;
ULONG Mode32BitConfig: 1;
ULONG IRQRouteConfig: 5;
ULONG IRQDeliverySelect: 1;
ULONG FSBIRQCapable: 1;
ULONG Reserved2: 16;
};
ULONG AsULONG;
} ETB_CONF_CAPS, *PETB_CONF_CAPS;
VOID
HalpmmTimerInit(
IN ULONG EventTimerBlockID,
IN ULONG BaseAddress
);
ULONG
HalpmmTimerSetTimeIncrement(
IN ULONG DesiredIncrement
);
VOID
HalpmmTimerStallExecProc(
IN ULONG Microseconds
);
LARGE_INTEGER
HalpmmTimerQueryPerfCount(
OUT PLARGE_INTEGER PerformanceFrequency OPTIONAL
);
VOID
HalpmmTimerCalibratePerfCount(
IN LONG volatile *Number,
IN ULONGLONG NewCount
);
BOOLEAN
HalpmmTimer(
VOID
);
VOID
HalpmmTimerClockInit(
VOID
);
#endif // __MMTIMER_H__