run without lapic and ioapic, if they are not present

if no lapic available, use 8253pit for clock
now xv6 runs both on qemu (uniprocessor) and bochs (uniprocessor and MP)

1 files changed, 2 insertions, 2 deletions

diff --git a/picirq.c b/picirq.c
index 184e693..eaac053 100644
--- a/picirq.c
+++ b/picirq.c
@@ -11,9 +11,9 @@
 
 // Current IRQ mask.
 // Initial IRQ mask has interrupt 2 enabled (for slave 8259A).
-static ushort irq_mask_8259A = 0xFFFF & ~(1<<IRQ_SLAVE);
+ushort irq_mask_8259A = 0xFFFF & ~(1<<IRQ_SLAVE);
 
-static void
+void
 irq_setmask_8259A(ushort mask)
 {
   irq_mask_8259A = mask;