Major interrupt change

2024-10-23 14:11:22 +02:00
parent 11feab5014
commit f163659f0c
38 changed files with 498 additions and 468 deletions
@@ -0,0 +1,103 @@
+#include <interrupt/isr.h>
+#include <interrupt/idt.h>
+#include <syscalls/syscalls.h>
+#include <error/panic.h>
+#include <error/debug.h>
+#include <ports/io.h>
+
+const char* format = "\x1b[31mPanic: %s!\n";
+const char* exceptions[] = {
+    "Division By Zero",
+    "Debug",
+    "Non Maskable Interrupt",
+    "Breakpoint",
+    "Into Detected Overflow",
+    "Out of Bounds",
+    "Invalid Opcode",
+    "No Coprocessor",
+    "Double Fault",
+    "Coprocessor Segment Overrun",
+    "Bad TSS",
+    "Segment Not Present",
+    "Stack Fault",
+    "General Protection Fault",
+    "Page Fault",
+    "Unknown Interrupt",
+    "Coprocessor Fault",
+    "Alignment Check",
+    "Machine Check",
+    "Reserved",
+    "Reserved",
+    "Reserved",
+    "Reserved",
+    "Reserved",
+    "Reserved",
+    "Reserved",
+    "Reserved",
+    "Reserved",
+    "Reserved",
+    "Reserved",
+    "Reserved",
+    "Reserved"
+};
+
+void remapPic() {
+    outb(0x20, 0x11);
+    outb(0xa0, 0x11);
+    outb(0x21, 0x20);
+    outb(0xa1, 0x28);
+    outb(0x21, 0x04);
+    outb(0xa1, 0x02);
+    outb(0x21, 0x01);
+    outb(0xa1, 0x01);
+    outb(0x21, 0x00);
+    outb(0xa1, 0x00);
+}
+
+HandlerPtr irqHandlers[16] = { 0 }; // IRQ 0-15
+
+void setupIsrs() {
+    setupIdt();
+    remapPic(); // Remap IRQs 0-15 -> 32-48
+
+    for (int i = 0; i < 48; i++) {
+        idtSetGate(i, asm_isrRedirectTable[i], TRAP_GATE_FLAGS);
+    }
+
+    // System call
+    idtSetGate(0x80, isr128, USR_INT_GATE_FLAGS);
+
+    __asm__ volatile ("sti");
+}
+
+void registerIrq(uint8_t id, HandlerPtr handler) {
+    irqHandlers[id] = handler;
+}
+
+void sendPicEOI(uint8_t irq) {
+    if (irq >= 8) {
+        outb(0xA0, 0x20);    // PIC2 Command
+    }
+    outb(0x20, 0x20);   // PIC1 Command
+}
+
+int handleInterrupt(intFrame_t iframe) {
+    if (iframe.interrupt < 32) { 
+        // ISRs 0-31 - Exceptions
+        debugf(format, exceptions[iframe.interrupt]);
+        panic();
+    } else if (iframe.interrupt >= 32 && iframe.interrupt < 48) {
+        // ISRs 32-47 - Hardware interrupts
+        uint8_t irq = iframe.interrupt - 32;
+        if (irqHandlers[irq]) {
+            irqHandlers[irq](&iframe);
+            sendPicEOI(irq);
+        }
+    } else if (iframe.interrupt == 128) { 
+        // ISR 128 - System call
+        return syscallHandler(&iframe);
+    }
+
+    return 0;
+}
+