Moved source to kernel directory

1 files changed, 155 insertions, 0 deletions

diff --git a/src/kernel/interrupts/isr.c b/src/kernel/interrupts/isr.c
new file mode 100644
index 0000000..8da7919
--- /dev/null
+++ b/src/kernel/interrupts/isr.c
@@ -0,0 +1,155 @@
+#include "../graphics/graphics.h"
+#include "interrupts.h"
+
+// Defined in isr.asm
+extern void isr0();
+
+extern void isr1();
+
+extern void isr2();
+
+extern void isr3();
+
+extern void isr4();
+
+extern void isr5();
+
+extern void isr6();
+
+extern void isr7();
+
+extern void isr8();
+
+extern void isr9();
+
+extern void isr10();
+
+extern void isr11();
+
+extern void isr12();
+
+extern void isr13();
+
+extern void isr14();
+
+extern void isr15();
+
+extern void isr16();
+
+extern void isr17();
+
+extern void isr18();
+
+extern void isr19();
+
+extern void isr20();
+
+extern void isr21();
+
+extern void isr22();
+
+extern void isr23();
+
+extern void isr24();
+
+extern void isr25();
+
+extern void isr26();
+
+extern void isr27();
+
+extern void isr28();
+
+extern void isr29();
+
+extern void isr30();
+
+extern void isr31();
+
+// Install ISRs in IDT
+void isrs_install() {
+    idt_set_gate(0, (unsigned) isr0, 0x08, 0x8E);
+    idt_set_gate(1, (unsigned) isr1, 0x08, 0x8E);
+    idt_set_gate(2, (unsigned) isr2, 0x08, 0x8E);
+    idt_set_gate(3, (unsigned) isr3, 0x08, 0x8E);
+    idt_set_gate(4, (unsigned) isr4, 0x08, 0x8E);
+    idt_set_gate(5, (unsigned) isr5, 0x08, 0x8E);
+    idt_set_gate(6, (unsigned) isr6, 0x08, 0x8E);
+    idt_set_gate(7, (unsigned) isr7, 0x08, 0x8E);
+
+    idt_set_gate(8, (unsigned) isr8, 0x08, 0x8E);
+    idt_set_gate(9, (unsigned) isr9, 0x08, 0x8E);
+    idt_set_gate(10, (unsigned) isr10, 0x08, 0x8E);
+    idt_set_gate(11, (unsigned) isr11, 0x08, 0x8E);
+    idt_set_gate(12, (unsigned) isr12, 0x08, 0x8E);
+    idt_set_gate(13, (unsigned) isr13, 0x08, 0x8E);
+    idt_set_gate(14, (unsigned) isr14, 0x08, 0x8E);
+    idt_set_gate(15, (unsigned) isr15, 0x08, 0x8E);
+
+    idt_set_gate(16, (unsigned) isr16, 0x08, 0x8E);
+    idt_set_gate(17, (unsigned) isr17, 0x08, 0x8E);
+    idt_set_gate(18, (unsigned) isr18, 0x08, 0x8E);
+    idt_set_gate(19, (unsigned) isr19, 0x08, 0x8E);
+    idt_set_gate(20, (unsigned) isr20, 0x08, 0x8E);
+    idt_set_gate(21, (unsigned) isr21, 0x08, 0x8E);
+    idt_set_gate(22, (unsigned) isr22, 0x08, 0x8E);
+    idt_set_gate(23, (unsigned) isr23, 0x08, 0x8E);
+
+    idt_set_gate(24, (unsigned) isr24, 0x08, 0x8E);
+    idt_set_gate(25, (unsigned) isr25, 0x08, 0x8E);
+    idt_set_gate(26, (unsigned) isr26, 0x08, 0x8E);
+    idt_set_gate(27, (unsigned) isr27, 0x08, 0x8E);
+    idt_set_gate(28, (unsigned) isr28, 0x08, 0x8E);
+    idt_set_gate(29, (unsigned) isr29, 0x08, 0x8E);
+    idt_set_gate(30, (unsigned) isr30, 0x08, 0x8E);
+    idt_set_gate(31, (unsigned) isr31, 0x08, 0x8E);
+}
+
+// Error exception messages
+const char *exception_messages[] = {
+        "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"
+};
+
+// Master exception handler - halt via endless loop
+void fault_handler(struct regs *r) {
+    if (r->int_no < 32) {
+        terminal_write_string("\n");
+        terminal_write_string(exception_messages[r->int_no]);
+        terminal_write_string(" Exception. System Halted!\n");
+        for (;;);
+    }
+}