apic.c

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#include <modules/drivers/apic/apic_timer.h>
#include <modules/drivers/apic/ioapic.h>
#include <modules/drivers/apic/lapic.h>
 
#include <kernel/cpu/cpu.h>
#include <kernel/log/log.h>
#include <kernel/module/module.h>
 
#include <kernel/defs.h>
 
/**
 * @brief Advanced Programmable Interrupt Controller.
 * @defgroup modules_drivers_apic APIC
 * @ingroup modules_drivers
 *
 * This module implements the Advanced Programmable Interrupt Controller (APIC) driver, which includes the per-CPU
 * local APICs, the IO APICs and the APIC timer.
 *
 * @see [ACPI Specification Version 6.6](https://uefi.org/sites/default/files/resources/ACPI_Spec_6.6.pdf)
 */
 
static void apic_cpu_handler(cpu_t* cpu, const cpu_event_t* event)
{
    (void)cpu;
 
    switch (event->type)
    {
    case CPU_ONLINE:
    {
        lapic_init(cpu);
    }
    break;
    default:
        break;
    }
}
 
uint64_t _module_procedure(const module_event_t* event)
{
    switch (event->type)
    {
    case MODULE_EVENT_DEVICE_ATTACH:
        if (lapic_global_init() == ERR)
        {
            LOG_ERR("failed to initialize lapic\n");
            return ERR;
        }
        if (apic_timer_init() == ERR)
        {
            LOG_ERR("failed to initialize apic timer\n");
            return ERR;
        }
        if (ioapic_all_init() == ERR)
        {
            LOG_ERR("failed to initialize ioapics\n");
            return ERR;
        }
        if (cpu_handler_register(apic_cpu_handler) == ERR)
        {
            LOG_ERR("failed to register apic cpu event handler\n");
            return ERR;
        }
        break;
    default:
        break;
    }
 
    return 0;
}
 
MODULE_INFO("APIC Driver", "Kai Norberg", "A driver for the APIC, local APIC and IOAPIC", OS_VERSION, "MIT", "PNP0003");