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feat/kernel: APIC (LAPIC / IOAPIC) and PIT

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This commit is contained in:
Kevin Alavik 2025-05-16 20:19:05 +02:00
parent cdceef1da7
commit 9fcac766f6
Signed by: cmpsb
GPG key ID: 10D1CC0526FDC6D7
10 changed files with 350 additions and 11 deletions
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37
kernel/src/emk.c
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@ -20,6 +20,9 @@
#include <sys/acpi.h>
#include <sys/acpi/madt.h>
#include <arch/smp.h>
#include <sys/lapic.h>
#include <sys/ioapic.h>
#include <sys/pit.h>
__attribute__((used, section(".limine_requests"))) static volatile LIMINE_BASE_REVISION(3);
__attribute__((used, section(".limine_requests"))) static volatile struct limine_memmap_request memmap_request = {
@ -58,6 +61,12 @@ struct limine_mp_response *mp_response = NULL;
struct flanterm_context *ft_ctx = NULL;
#endif // FLANTERM_SUPPORT
void tick(struct register_ctx *)
{
log_early("tick");
lapic_eoi();
}
void emk_entry(void)
{
__asm__ volatile("movq %%rsp, %0" : "=r"(kstack_top));
@ -168,15 +177,6 @@ void emk_entry(void)
kfree(c);
log_early("Initialized kernel heap");
/* Setup SMP */
if (!mp_request.response)
{
kpanic(NULL, "Failed to get MP request");
}
mp_response = mp_request.response;
smp_init();
/* Setup ACPI and APIC */
rsdp_response = rsdp_request.response;
if (!rsdp_response)
@ -188,7 +188,24 @@ void emk_entry(void)
/* Setup MADT */
madt_init();
log_early("Initialized APIC");
ioapic_init();
log_early("Initialized IOAPIC");
lapic_init();
log_early("Initialized LAPIC");
/* Setup timer */
pit_init(tick);
log_early("Initialized Timer");
/* Setup SMP */
if (!mp_request.response)
{
kpanic(NULL, "Failed to get MP request");
}
mp_response = mp_request.response;
smp_init();
log_early("Initialized SMP");
hlt();
}