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HPET

include/acpi/hpet.h View source View on GitHub

Unions

Section titled “Unions”

hpet_timer_general_capabilities

Section titled “hpet_timer_general_capabilities”
union hpet_timer_general_capabilities {
    uint64_t  raw;
    struct {
        uint64_t  rev_id : 7;
        uint64_t  num_timers : 5;
        uint64_t  counter_size : 1;
        uint64_t  reserved : 1;
        uint64_t  leg_rt_cap : 1;
        uint64_t  vendor_id : 16;
        uint64_t  counter_clock_period : 32;
    };
};

hpet_timer_config

Section titled “hpet_timer_config”
union hpet_timer_config {
    uint64_t  raw;
    struct {
        uint64_t  reserved0 : 1;
        uint64_t  interrupt_type : 1;
        uint64_t  interrupt_enable : 1;
        uint64_t  type : 1;
        uint64_t  periodic_capable : 1;
        uint64_t  size_capable : 1;
        uint64_t  value_set : 1;
        uint64_t  reserved1 : 1;
        uint64_t  timer_32bit : 1;
        uint64_t  ioapic_route : 5;
        uint64_t  fsb_int_enable : 1;
        uint64_t  fsb_int_delivery : 1;
        uint64_t  reserved2 : 16;
        uint64_t  route_cap : 32;
    };
};

Functions

Section titled “Functions”

hpet_init

Section titled “hpet_init”
void hpet_init(void);

hpet_timestamp_ns

Section titled “hpet_timestamp_ns”
uint64_t hpet_timestamp_ns(void);

hpet_program_oneshot

Section titled “hpet_program_oneshot”
void hpet_program_oneshot(uint64_t future_ms);

hpet_timestamp_ms

Section titled “hpet_timestamp_ms”
uint64_t hpet_timestamp_ms(void);

hpet_timestamp_us

Section titled “hpet_timestamp_us”
uint64_t hpet_timestamp_us(void);

hpet_disable

Section titled “hpet_disable”
void hpet_disable(void);

hpet_enable

Section titled “hpet_enable”
void hpet_enable(void);

hpet_clear_interrupt_status

Section titled “hpet_clear_interrupt_status”
void hpet_clear_interrupt_status(void);

hpet_setup_timer

Section titled “hpet_setup_timer”
void hpet_setup_timer(uint8_t timer_index, irq_t irq_line, bool periodic, bool edge_triggered);

hpet_write64

Section titled “hpet_write64”
void hpet_write64(uint64_t offset, uint64_t value);

hpet_read64

Section titled “hpet_read64”
uint64_t hpet_read64(uint64_t offset);

Variables

Section titled “Variables”

hpet_base

Section titled “hpet_base”
extern uint64_t *hpet_base;

hpet_timer_count

Section titled “hpet_timer_count”
extern uint64_t hpet_timer_count;

hpet_fs_per_tick

Section titled “hpet_fs_per_tick”
extern uint64_t hpet_fs_per_tick;

Macros

Section titled “Macros”

HPET_GEN_CAP_ID_OFFSET

Section titled “HPET_GEN_CAP_ID_OFFSET”
#define HPET_GEN_CAP_ID_OFFSET 0x0

HPET_GEN_CONF_OFFSET

Section titled “HPET_GEN_CONF_OFFSET”
#define HPET_GEN_CONF_OFFSET 0x10

HPET_GEN_INT_STAT_OFFSET

Section titled “HPET_GEN_INT_STAT_OFFSET”
#define HPET_GEN_INT_STAT_OFFSET 0x20

HPET_IRQ_BASE

Section titled “HPET_IRQ_BASE”
#define HPET_IRQ_BASE 2

HPET_MAIN_COUNTER_OFFSET

Section titled “HPET_MAIN_COUNTER_OFFSET”
#define HPET_MAIN_COUNTER_OFFSET 0xF0

HPET_TIMER_CONF_OFFSET

Section titled “HPET_TIMER_CONF_OFFSET”
#define HPET_TIMER_CONF_OFFSET(num) (0x100 + (num * 0x20))

HPET_TIMER_COMPARATOR_OFFSET

Section titled “HPET_TIMER_COMPARATOR_OFFSET”
#define HPET_TIMER_COMPARATOR_OFFSET(num) (HPET_TIMER_CONF_OFFSET(num) + 0x8)

HPET_CURRENT

Section titled “HPET_CURRENT”
#define HPET_CURRENT (smp_core_id() % hpet_timer_count)

HPET_IRQ_LINE

Section titled “HPET_IRQ_LINE”
#define HPET_IRQ_LINE 2