Re: patch: power off

[Tetsuya Isaki <isaki%pastel-flower.jp@localhost>]

At Mon, 24 Mar 2014 00:26:05 +0900,
Izumi Tsutsui wrote:
> > Current x68k kernel supports software power-off (by sysmon(4)),
> > but in fact, the kernel does not turn off the power.  Power off
> > is happened in IPLROM after software reset.
> > 
> > So, I wrote a patch that the kernel does power off itself.
> > Any comments?
> 
> Basically looks good, but I have some dumb comments. (see below)
(snip)

After this, tsutsui@ suggested a different method.  Here is the
patch.  It's very simple than my previous one :-)
It also works fine (on XM6i) of course.
---
Tetsuya Isaki <isaki%pastel-flower.jp@localhost / isaki%NetBSD.org@localhost>

Index: sys/arch/x68k/x68k/machdep.c
===================================================================
RCS file: /cvsroot/src/sys/arch/x68k/x68k/machdep.c,v
retrieving revision 1.188
diff -u -r1.188 machdep.c
--- sys/arch/x68k/x68k/machdep.c        22 Mar 2014 21:49:18 -0000      1.188
+++ sys/arch/x68k/x68k/machdep.c        24 Mar 2014 14:00:55 -0000
@@ -517,16 +517,20 @@
         *      Power cannot be removed; simply halt the system (b)
         *      Power switch state is checked in shutdown hook
         *  a2: the power switch is off
-        *      Remove the power; the simplest way is go back to ROM eg. reboot
+        *      Remove the power
         * b) RB_HALT
         *      call cngetc
         * c) otherwise
         *      Reboot
         */
-       if (((howto & RB_POWERDOWN) == RB_POWERDOWN) && power_switch_is_off)
-               doboot();
-       else if (/*((howto & RB_POWERDOWN) == RB_POWERDOWN) ||*/
-                ((howto & RB_HALT) == RB_HALT)) {
+       if (((howto & RB_POWERDOWN) == RB_POWERDOWN) && power_switch_is_off) {
+               /* power-off sequence */
+               intio_set_sysport_powoff(0x00);
+               intio_set_sysport_powoff(0x0f);
+               intio_set_sysport_powoff(0x0f);
+               delay(1000000);
+               /* PASSTHROUGH even if came back */
+       } else if ((howto & RB_HALT) == RB_HALT) {
                printf("System halted.  Hit any key to reboot.\n\n");
                (void)cngetc();
        }