shutdown / reboot

kernel/acpi/power.c

@@ -0,0 +1,34 @@
+#include "power.h"
+#include "../lib/assert.h"
+#include "../drivers/ps2kb.h"
+
+static void (*funcs[MAX_SHUTDOWN_FUNCS])(void);
+static int n_funcs = 0;
+// register function to execute
+// right before the computer
+// shuts down / reboots
+void atshutdown(void (*fun)(void)) {
+    assert(n_funcs < MAX_SHUTDOWN_FUNCS);
+    funcs[n_funcs++] = fun;
+}
+
+void shutdown(void) {
+    // cannot shutdown anything yet.
+    // need an AML interpreter.
+    reboot();
+}
+
+
+// reboot the computer using the 
+// ps/2 controller
+void reboot(void) {
+    for(int i = 0; i < n_funcs; i++)
+        funcs[i]();
+
+    _cli();
+    
+    ps2_trigger_CPU_reset();
+
+    for(;;)
+        asm("hlt"); 
+}

kernel/acpi/power.h

@@ -0,0 +1,12 @@
+#pragma once
+
+
+// register function to execute
+// right before the computer
+// shuts down / reboots
+void atshutdown(void (*)(void));
+
+#define MAX_SHUTDOWN_FUNCS 128
+
+void shutdown(void);
+void reboot(void);