hpet.h File Reference

The High Precision Event Timer (HPET). More...

#include "types.h"

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Classes
struct	HPET::Comparator::ConfigAndCapabilitiesRegister.__unnamed46__

Namespaces
namespace	HPET
	Abstraction of the HPET existing in "modern" computers (since ~2005)

Enumerations
enum	HPET::CounterSize {   SIZE_32BIT = 0x0 ,   SIZE_64BIT = 0x1 }
	Size of the global counter and the comparators.

Functions
bool	HPET::init ()
	Initializes the HPET system from ACPI Table. More...
void	HPET::delay (uint64_t usecs)
	Delays the caller's execution by approx. More...
bool	HPET::isEnabled ()
	Checks whether the HPET system is enabled. More...
void	HPET::enable ()
	Activate the HPET system. More...
void	HPET::disable ()
	Deactivate the HPET system. More...
void	HPET::reset ()
	Reset the global counter to zero. More...
Comparator *	HPET::getComparator (size_t n)
	Returns a pointer to the nth timer comparator. More...
size_t	HPET::countComparators ()
	Retrieve the number of HPET comparators. More...

Detailed Description

The High Precision Event Timer (HPET).

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Class Documentation

HPET::Comparator::ConfigAndCapabilitiesRegister.__unnamed46__

struct HPET::Comparator::ConfigAndCapabilitiesRegister.__unnamed46__

Class Members
uint64_t	__pad0__: 1
TriggerMode	trigger_mode: 1	Generate edge or level triggered interrupts.
uint64_t	interrupt_status: 1	Enable (1) or disable (0) interrupts.
ComparatorMode	comparator_mode: 1	periodic or one shot mode
uint64_t	periodic_capable: 1	Is timer capable of periodic mode (read-only)
CounterSize	counter_size: 1	32- or 64bit size (read-only)
uint64_t	set_value: 1	if set to 1, the accumulator can be set in software
uint64_t	__pad1__: 1
uint64_t	small_mode: 1	if set to 1 while supporting 64bit size, the timer runs in 32-bit mode
uint64_t	ioapic_slot: 5	I/O-APIC slot (must be set in mask supported_ioapic_slots)
uint64_t	fsb_interrupt_enabled: 1	if set to 1, the timer will use FSB interrupt mapping
uint64_t	fsb_interrupt_delivery: 1	if set to 1, the timer supports FSB interrupt mapping (read-only)
uint64_t	__pad2__: 16
uint64_t	supported_ioapic_slots: 32	bit mask containing the supported I/O APIC slots (read-only)