Clean up the SMP AP bootstrap and eliminate the wretched idle procs.

- We now have enough per-cpu idle context, the real idle loop has been
revived (cpu's halt now with nothing to do).
- Some preliminary support for running some operations outside the
global lock (eg: zeroing "free but not yet zeroed pages") is present
but appears to cause problems.  Off by default.
- the smp_active sysctl now behaves differently. It's merely a 'true/false'
option.  Setting smp_active to zero causes the AP's to halt in the idle
loop and stop scheduling processes.
- bootstrap is a lot safer.  Instead of sharing a statically compiled in
stack a number of times (which has caused lots of problems) and then
abandoning it, we use the idle context to boot the AP's directly.  This
should help >2 cpu support since the bootlock stuff was in doubt.
- print physical apic id in traps.. helps identify private pages getting
out of sync.  (You don't want to know how much hair I tore out with this!)

More cleanup to follow, this is more of a checkpoint than a
'finished' thing.

1 files changed, 6 insertions, 1 deletions

diff --git a/sys/kern/subr_trap.c b/sys/kern/subr_trap.c
index ac139d5..5895361 100644
--- a/sys/kern/subr_trap.c
+++ b/sys/kern/subr_trap.c
@@ -35,7 +35,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)trap.c	7.4 (Berkeley) 5/13/91
- *	$Id: trap.c,v 1.106 1997/08/20 05:25:48 fsmp Exp $
+ *	$Id: trap.c,v 1.107 1997/08/21 06:32:39 charnier Exp $
  */
 
 /*
@@ -725,6 +725,7 @@ trap_fatal(frame)
 			ISPL(frame->tf_cs) == SEL_UPL ? "user" : "kernel");
 #ifdef SMP
 	printf("cpuid = %d\n", cpuid);
+	printf("lapic.id = %d\n", lapic.id);
 #endif
 	if (type == T_PAGEFLT) {
 		printf("fault virtual address	= 0x%x\n", eva);
@@ -769,6 +770,9 @@ trap_fatal(frame)
 	} else {
 		printf("Idle\n");
 	}
+#ifdef SMP
+	printf("mp_lock                 = %08x\n", mp_lock);
+#endif
 	printf("interrupt mask		= ");
 	if ((cpl & net_imask) == net_imask)
 		printf("net ");
@@ -824,6 +828,7 @@ dblfault_handler()
 	printf("ebp = 0x%x\n", common_tss.tss_ebp);
 #ifdef SMP
 	printf("cpuid = %d\n", cpuid);
+	printf("lapic.id = %d\n", lapic.id);
 #endif
 	panic("double fault");
 }