kaguya
336af1c2ad
We have reorganized all the file directories that previously looked ugly as hell (cough cough arch/x86_64 cough) Now it looks much cleaner Signed-off-by: kaguya <vpshinomiya@protonmail.com>
109 lines
2.4 KiB
C
109 lines
2.4 KiB
C
#include "irq.h"
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#include "i8259.h"
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#include "arch/x86_64/cpu/io.h"
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#include <stddef.h>
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#include "libk/arrays.h"
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#include "libk/stdio.h"
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#include "libk/debug.h"
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#include "apic.h"
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#include "ioapic.h"
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#define PIC_REMAP_OFFSET 0x20
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#define MODULE "PIC"
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IRQHandler g_IRQHandlers[16];
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static IRQHandler g_APICHandlers[256];
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const PICDriver* g_Driver = NULL;
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extern bool g_IOAPIC;
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void x86_64_IRQ_Handler(Registers *regs)
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{
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int irq = regs->interrupt - PIC_REMAP_OFFSET;
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if (g_IRQHandlers[irq] != NULL)
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{
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// handle IRQ
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g_IRQHandlers[irq](regs);
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}
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else
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{
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log_warn(MODULE, "Unhandled IRQ %d...", irq);
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}
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g_Driver->SendEndOfInterrupt(irq);
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}
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void x86_64_APIC_IRQ_Handler(Registers* regs)
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{
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uint8_t vector = regs->interrupt;
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if (g_APICHandlers[vector] != NULL) {
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g_APICHandlers[vector](regs);
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} else {
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log_warn("APIC", "Unhandled vector 0x%02x", vector);
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}
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lapic_eoi(); // ← This is the key difference from PIC!
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}
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void x86_64_IRQ_Initialize(void)
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{
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const PICDriver* drivers[] = {
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i8259_GetDriver(),
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};
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for (int i = 0; i < SIZE(drivers); i++) {
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if (drivers[i]->Probe()) {
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g_Driver = drivers[i];
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}
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}
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if (g_Driver == NULL) {
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log_warn(MODULE, "No PIC found!");
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return;
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}
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log_info(MODULE, "Found %s PIC.", g_Driver->Name);
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g_Driver->Initialize(PIC_REMAP_OFFSET, PIC_REMAP_OFFSET + 8, false);
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// register ISR handlers for each of the 16 irq lines
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for (int i = 0; i < 16; i++)
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x86_64_ISR_RegisterHandler(PIC_REMAP_OFFSET + i, x86_64_IRQ_Handler);
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g_Driver->Unmask(0);
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}
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void x86_64_IRQ_RegisterHandler(int irq, IRQHandler handler)
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{
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g_IRQHandlers[irq] = handler;
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}
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void x86_64_APIC_IRQ_RegisterHandler(uint8_t vector, IRQHandler handler)
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{
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if (vector < 32) {
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printf("[APIC] Warning: vector %u is in reserved range!\n", vector);
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}
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g_APICHandlers[vector] = handler;
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x86_64_ISR_RegisterHandler(vector, x86_64_APIC_IRQ_Handler);
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}
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void x86_64_APIC_IRQ_RedirectAndRegister(uint8_t isa_irq,
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uint8_t vector,
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IRQHandler handler)
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{
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x86_64_APIC_IRQ_RegisterHandler(vector, handler);
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irq_redirect_to_apic(isa_irq, vector, lapic_id(), false);
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}
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void x86_64_IRQ_Unmask(int irq)
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{
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if (g_Driver) g_Driver->Unmask(irq);
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} |