HPET

include/acpi/hpet.h

union hpet_timer_general_capabilities

union hpet_timer_general_capabilities {
    uint64_t  raw;
    struct {
        uint64_t  rev_id;
        uint64_t  num_timers;
        uint64_t  counter_size;
        uint64_t  reserved;
        uint64_t  leg_rt_cap;
        uint64_t  vendor_id;
        uint64_t  counter_clock_period;
    };
};

union hpet_timer_config

union hpet_timer_config {
    uint64_t  raw;
    struct {
        uint64_t  reserved0;
        uint64_t  interrupt_type;
        uint64_t  interrupt_enable;
        uint64_t  type;
        uint64_t  periodic_capable;
        uint64_t  size_capable;
        uint64_t  value_set;
        uint64_t  reserved1;
        uint64_t  timer_32bit;
        uint64_t  ioapic_route;
        uint64_t  fsb_int_enable;
        uint64_t  fsb_int_delivery;
        uint64_t  reserved2;
        uint64_t  route_cap;
    };
};

hpet_write64

void hpet_write64(uint64_t offset, uint64_t value);

hpet_read64

uint64_t hpet_read64(uint64_t offset);

Defines

HPET_GEN_CAP_ID_OFFSET

#define HPET_GEN_CAP_ID_OFFSET 0x0

HPET_GEN_CONF_OFFSET

#define HPET_GEN_CONF_OFFSET 0x10

HPET_GEN_INT_STAT_OFFSET

#define HPET_GEN_INT_STAT_OFFSET 0x20

HPET_IRQ_BASE

#define HPET_IRQ_BASE 2

HPET_MAIN_COUNTER_OFFSET

#define HPET_MAIN_COUNTER_OFFSET 0xF0

HPET_TIMER_CONF_OFFSET(num)

#define HPET_TIMER_CONF_OFFSET(num) (0x100 + (num * 0x20))

HPET_TIMER_COMPARATOR_OFFSET(num)

#define HPET_TIMER_COMPARATOR_OFFSET(num) (HPET_TIMER_CONF_OFFSET(num) + 0x8)

HPET_CURRENT

#define HPET_CURRENT (smp_core_id() % hpet_timer_count)

HPET_IRQ_LINE

#define HPET_IRQ_LINE 2

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