Initial Upload

2022-12-06 11:49:47 +00:00
commit 0ee33aaa97
274 changed files with 60109 additions and 0 deletions
--- a/picirq.c
+++ b/picirq.c
@ -0,0 +1,17 @@
+#include "types.h"
+#include "x86.h"
+#include "traps.h"
+
+// I/O Addresses of the two programmable interrupt controllers
+#define IO_PIC1         0x20    // Master (IRQs 0-7)
+#define IO_PIC2         0xA0    // Slave (IRQs 8-15)
+
+// Don't use the 8259A interrupt controllers.  Xv6 assumes SMP hardware.
+void picinit(void) {
+    // mask all interrupts
+    outb(IO_PIC1 + 1, 0xFF);
+    outb(IO_PIC2 + 1, 0xFF);
+}
+
+
+