[src/trunk]: src/sys/arch/sgimips/sgimips Obey the RB_POWERDOWN flag passed t...

[rafal <rafal%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/7aa465711583
branches:  trunk
changeset: 515168:7aa465711583
user:      rafal <rafal%NetBSD.org@localhost>
date:      Tue Sep 18 05:19:29 2001 +0000

description:
Obey the RB_POWERDOWN flag passed to cpu_reboot; make it work on the Indy
by enabling the FPU before jumping back to ARCS (gross, but necessary!).

diffstat:

 sys/arch/sgimips/sgimips/machdep.c |  20 ++++++++++++++++----
 1 files changed, 16 insertions(+), 4 deletions(-)

diffs (38 lines):

diff -r be45bf5806fd -r 7aa465711583 sys/arch/sgimips/sgimips/machdep.c
--- a/sys/arch/sgimips/sgimips/machdep.c        Tue Sep 18 05:11:15 2001 +0000
+++ b/sys/arch/sgimips/sgimips/machdep.c        Tue Sep 18 05:19:29 2001 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: machdep.c,v 1.24 2001/09/10 21:19:34 chris Exp $       */
+/*     $NetBSD: machdep.c,v 1.25 2001/09/18 05:19:29 rafal Exp $       */
 
 /*
  * Copyright (c) 2000 Soren S. Jorvang
@@ -599,13 +599,25 @@
 
        doshutdownhooks();
 
-#if 0
-       if (howto & RB_POWERDOWN) {
+       /*
+        * Calling ARCBIOS->PowerDown() results in a "CP1 unusable trap"
+        * which lands me back in DDB, at least on my Indy.  So, enable 
+        * the FPU before asking the PROM to power down to avoid this.. 
+        * It seems to want the FPU to play the `poweroff tune' 8-/
+        */
+       if ((howto & RB_POWERDOWN) == RB_POWERDOWN) {
+               /* Set CP1 usable bit in SR */
+               mips_cp0_status_write(mips_cp0_status_read() | 
+                                       MIPS_SR_COP_1_BIT);     
+
                printf("powering off...\n\n");
+               delay(500000);
                ARCBIOS->PowerDown();
                printf("WARNING: powerdown failed\n");
+               /*
+                * RB_POWERDOWN implies RB_HALT... fall into it...
+                */
        }
-#endif
 
        if (howto & RB_HALT) {
                printf("halting...\n\n");