Added foundation code to initialize the PIT and create a 10ms jiffies

counter.

1 files changed, 17 insertions, 5 deletions

diff --git a/kernel/kmain.c b/kernel/kmain.c
index e31782c..5b10ee1 100644
--- a/kernel/kmain.c
+++ b/kernel/kmain.c
@@ -1,6 +1,16 @@
+#include <asm/io.h>
 #include <kernel/con.h>
+#include <stdint.h>
 
-extern int printf(char *fmt, ...);
+uint32_t ticks = 0;
+
+#define millis() \
+  (ticks * 10)
+
+void sleep(int ms) {
+  uint64_t t = millis() + ms;
+  while(millis() < t);
+}
 
 void kmain(void) {
   con_init();
@@ -8,8 +18,10 @@ void kmain(void) {
   printf("Kernel booting...\n");
   printf("Kernel booted!\n");
 
-  printf("Number: %s %04x\n", "test", 0x18C);
-  printf("Number: %s %04X\n", "test", 0x18C);
-  printf("Number: %s %#04x\n", "test", 0x18C);
-  printf("Number: %s %#04X\n", "test", 0x18C);
+  printf("PIC1 Mask: 0x%02x\n", inb(0x21));
+
+  while(1) {
+    sleep(500);
+    printf("Reliable 500ms tick!\n");
+  }
 }