don't send keyboard interrupts to the second cpu, if we have only one cpu.

xv6 seems to work fine on uniprocessor now.

don't send keyboard interrupts to the second cpu, if we have only one cpu.
0b6ab841 · kaashoek · 7abf49d2 · 0b6ab841 · 0b6ab841
--- a/Notes
+++ b/Notes
@@ -117,7 +117,6 @@ echo foo > bar should truncate bar
  so O_CREATE should not truncate
  but O_TRUNC should

-make it work on one cpu
 make it work on a real machine
 release before acquire at end of sleep?
 check 2nd disk (i.e. if not in .bochsrc)
--- a/console.c
+++ b/console.c
@@ -365,8 +365,9 @@ console_read(int minor, char *dst, int n)

  acquire(&kbd_lock);

-  while(kbd_w == kbd_r)
+  while(kbd_w == kbd_r) {
    sleep(&kbd_r, &kbd_lock);
+  }

  while(n > 0 && kbd_w != kbd_r){
    *dst = (kbd_buf[kbd_r]) & 0xff;
@@ -392,7 +393,7 @@ console_init()
  devsw[CONSOLE].d_write = console_write;
  devsw[CONSOLE].d_read = console_read;

-  ioapic_enable (IRQ_KBD, 1);
+  ioapic_enable (IRQ_KBD, 0);

  use_console_lock = 1;
 }