kernel - v0.7 beta

+ acpi: add acpi support
+ lapic: add lapic support
+ ioapic: add ioapic support
+ arch/x86_64: add support for "syscall"/"sysret"

kernel/src/arch/x86_64/pit.c

@@ -0,0 +1,29 @@
+#include "arch//x86_64/idt.h"
+#include "sched/sched.h"
+#include <stdint.h>
+#include <sys/log.h>
+#include <arch//x86_64/idt.h>
+#include <arch//x86_64/pit.h>
+
+uint32_t tick = 0;
+
+void pit_handler(registers_t *regs) {
+  //log("PIT");
+  tick++;
+  schedule(regs);
+}
+
+void pit_init() {
+  outb(0x43, 0x36);
+  uint16_t div = (uint16_t)(1193180 / 1000);
+  outb(0x40, (uint8_t)div);
+  outb(0x40, (uint8_t)(div >> 8));
+  idt_register_irq(0, pit_handler);
+}
+
+void pit_sleep(uint32_t ms) {
+  uint64_t start = tick;
+  while (tick - start < ms) {
+    __asm__ volatile ("nop");
+  }
+}