void ap_main(void) {
remap_8259pic();
disable_8259pic();
apic_setup();
apic_timer_init(APIC_TIMER_INT_NO, 7, APIC_TIMER_PERIODIC);
apic_timer_set(apic_timer_init_count);
common_main();
}
void initapic()
{
/* Remap PIC */
remap_pic();
/* Detect APIC, panic if not found */
int ret = 0;
__asm__(
"movl $0x1, %%eax\n\t"
"cpuid\n\t"
"movl %%edx, %%ecx\n\t"
:"=c"(ret)
:
: "eax", "edx"
);
if (!(ret & (1 << 9)))
panic("No APIC found.");
/* Disable (mask) PIC*/
mask_pic();
/* Get APIC ID for first CPU */
uint32_t apic_id = read_lapic_reg(0x20);
write_ioapic_reg(0x10, 0x20);
write_ioapic_reg(0x11, (apic_id << 24) & 0x0F000000);
write_ioapic_reg(0x12, 0x21);
write_ioapic_reg(0x13, (apic_id << 24) & 0x0F000000);
/* mask mouse input */
write_ioapic_reg(0x28, 0x100FF);
write_ioapic_reg(0x29, (apic_id << 24) & 0x0F000000);
/* Spurious Interrupt Vector */
write_lapic_reg(0xF0, SPURIOUS_VECTOR + APIC_ENABLE);
/* enable interrupts */
__asm__("sti");
/* APIC timer initialization */
apic_timer_init();
}
