kern/thread: preliminary scheduling implementation

This change adds periodic timer interrupt reporting to the thread
module, basic thread selection, and context switching. It currently
only applies to the main processor. The x86/tcb module has been
drastically simplified as a side effect.

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/x86/machine/lapic.c b/arch/x86/machine/lapic.c
index c2a2b3a..a7931cf 100644
--- a/arch/x86/machine/lapic.c
+++ b/arch/x86/machine/lapic.c
@@ -22,6 +22,7 @@
 #include <kern/printk.h>
 #include <kern/stddef.h>
 #include <kern/stdint.h>
+#include <kern/thread.h>
 #include <machine/cpu.h>
 #include <machine/lapic.h>
 #include <machine/pmap.h>
@@ -320,6 +321,8 @@ void
 lapic_intr_timer(struct trap_frame *frame)
 {
     (void)frame;
+
+    thread_tick();
     lapic_eoi();
 }