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Add outb to keyboard controller to do a cpu_reset, this fixes 2 known

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cases of motherboards that failed to reboot.
This commit is contained in:
Rodney W. Grimes 1995-04-26 07:38:35 +00:00
parent 0170dd7dec
commit 2320728f46
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=8074
2 changed files with 28 additions and 2 deletions
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15
sys/amd64/amd64/vm_machdep.c
View File

@ -38,7 +38,7 @@
*
* from: @(#)vm_machdep.c 7.3 (Berkeley) 5/13/91
* Utah $Hdr: vm_machdep.c 1.16.1.1 89/06/23$
* $Id: vm_machdep.c,v 1.34 1995/03/16 18:11:33 bde Exp $
* $Id: vm_machdep.c,v 1.35 1995/03/19 14:28:41 davidg Exp $
*/
#include "npx.h"
@ -50,12 +50,15 @@
#include <sys/vnode.h>
#include <sys/user.h>
#include <machine/clock.h>
#include <machine/cpu.h>
#include <machine/md_var.h>
#include <vm/vm.h>
#include <vm/vm_kern.h>
#include <i386/isa/isa.h>
#ifdef BOUNCE_BUFFERS
vm_map_t io_map;
volatile int kvasfreecnt;
@ -804,6 +807,16 @@ vunmapbuf(bp)
void
cpu_reset() {
/*
* Attempt to do a CPU reset via the keyboard controller,
* do not turn of the GateA20, as any machine that fails
* to do the reset here would then end up in no man's land.
*/
outb(IO_KBD + 4, 0xFE);
DELAY(500000); /* wait 0.5 sec to see if that did it */
printf("Keyboard reset did not work, attempting CPU shutdown\n");
DELAY(1000000); /* wait 1 sec for printf to complete */
/* force a shutdown by unmapping entire address space ! */
bzero((caddr_t) PTD, NBPG);

15
sys/i386/i386/vm_machdep.c
View File

@ -38,7 +38,7 @@
*
* from: @(#)vm_machdep.c 7.3 (Berkeley) 5/13/91
* Utah $Hdr: vm_machdep.c 1.16.1.1 89/06/23$
* $Id: vm_machdep.c,v 1.34 1995/03/16 18:11:33 bde Exp $
* $Id: vm_machdep.c,v 1.35 1995/03/19 14:28:41 davidg Exp $
*/
#include "npx.h"
@ -50,12 +50,15 @@
#include <sys/vnode.h>
#include <sys/user.h>
#include <machine/clock.h>
#include <machine/cpu.h>
#include <machine/md_var.h>
#include <vm/vm.h>
#include <vm/vm_kern.h>
#include <i386/isa/isa.h>
#ifdef BOUNCE_BUFFERS
vm_map_t io_map;
volatile int kvasfreecnt;
@ -804,6 +807,16 @@ vunmapbuf(bp)
void
cpu_reset() {
/*
* Attempt to do a CPU reset via the keyboard controller,
* do not turn of the GateA20, as any machine that fails
* to do the reset here would then end up in no man's land.
*/
outb(IO_KBD + 4, 0xFE);
DELAY(500000); /* wait 0.5 sec to see if that did it */
printf("Keyboard reset did not work, attempting CPU shutdown\n");
DELAY(1000000); /* wait 1 sec for printf to complete */
/* force a shutdown by unmapping entire address space ! */
bzero((caddr_t) PTD, NBPG);