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feat/kernel: idek

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This commit is contained in:
Kevin Alavik 2025-05-17 12:47:15 +02:00
parent c10028d366
commit d9a5f8e3c0
Signed by: cmpsb
GPG key ID: 10D1CC0526FDC6D7
3 changed files with 31 additions and 17 deletions
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18
kernel/src/arch/idt.c
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@ -60,12 +60,16 @@ void idt_init()
int idt_register_handler(size_t vector, idt_intr_handler handler)
{
if (real_handlers[vector] != idt_default_interrupt_handler)
{
real_handlers[vector] = handler;
if (vector <= 14)
ioapic_redirect_irq(bootstrap_lapic_id, vector + 32, vector, false);
return 0;
}
if (vector >= 256 || handler == NULL)
return 1;
real_handlers[vector] = handler;
if (vector >= 32 && vector < 48)
{
size_t irq = vector - 32;
ioapic_redirect_irq(bootstrap_lapic_id, vector, irq, false);
}
return 0;
}

22
kernel/src/emk.c
View file

@ -72,7 +72,7 @@ void timer_init()
outb(0x43, 0x36);
outb(0x40, divisor & 0xFF);
outb(0x40, (divisor >> 8) & 0xFF);
idt_register_handler(0x32, tick);
idt_register_handler(32, tick);
}
void emk_entry(void)
@ -185,6 +185,16 @@ 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();
log_early("Initialized SMP");
/* Setup ACPI and APIC */
rsdp_response = rsdp_request.response;
if (!rsdp_response)
@ -204,15 +214,5 @@ void emk_entry(void)
/* Setup timer */
timer_init();
/* 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();
}

10
kernel/src/sys/ioapic.c
View file

@ -1,6 +1,7 @@
/* EMK 1.0 Copyright (c) 2025 Piraterna */
#include <sys/ioapic.h>
#include <boot/emk.h>
#include <util/log.h>
void ioapic_init()
{
@ -134,6 +135,8 @@ void ioapic_redirect_gsi(uint32_t lapic_id, uint8_t vec, uint32_t gsi, uint16_t
void ioapic_redirect_irq(uint32_t lapic_id, uint8_t vec, uint8_t irq, bool mask)
{
log_early("IOAPIC redirect: IRQ=%u -> Vector=0x%X (mask=%s)", irq, vec, mask ? "true" : "false");
for (uint32_t idx = 0; idx < madt_iso_len; idx++)
{
if (!madt_iso_list[idx])
@ -142,13 +145,20 @@ void ioapic_redirect_irq(uint32_t lapic_id, uint8_t vec, uint8_t irq, bool mask)
}
acpi_madt_ioapic_src_ovr_t *iso = madt_iso_list[idx];
log_early(" ISO override found: irq_source=%u, gsi=%u, flags=0x%X",
iso->irq_source, iso->gsi, iso->flags);
if (iso->irq_source == irq)
{
log_early(" Match found. Redirecting IRQ %u (GSI %u) to vector 0x%X",
irq, iso->gsi, vec);
ioapic_redirect_gsi(lapic_id, vec, iso->gsi, iso->flags, mask);
return;
}
}
log_early(" No ISO match. Redirecting IRQ %u directly to vector 0x%X", irq, vec);
ioapic_redirect_gsi(lapic_id, vec, irq, 0, mask);
}