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/* $OpenBSD: bug.c,v 1.6 2003/06/03 01:35:30 drahn Exp $ */
/*
* Copyright (c) 1995 Dale Rahn.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* bug routines -- assumes that the necessary sections of memory
* are preserved.
*/
#include <sys/param.h>
#include <machine/bugio.h>
#include <machine/prom.h>
/* flag to traphandler to signify prom call. presumes splhigh() */
extern volatile int promcall;
void bug_outln(char *, char *);
void bug_delay(int);
void bug_stat(void);
void asm_bug_stat(void);
/* tty routines */
char
bug_inchr()
{
int s = splhigh();
volatile char a;
promcall = 1;
asm volatile ("subql #2,sp");
MVMEPROM_CALL(MVMEPROM_INCHR);
asm volatile ("nop");
asm volatile ("movb sp@+,%0" : "=d" (a));
promcall = 0;
splx(s);
return (a);
}
/* returns 0 if no characters ready to read */
int
bug_instat()
{
int s = splhigh();
volatile short ret;
promcall = 1;
MVMEPROM_CALL(MVMEPROM_INSTAT);
asm volatile ("nop");
asm volatile ("movw ccr,%0" : "=d" (ret));
promcall = 0;
splx(s);
return (!(ret & 0x4));
}
void
bug_outchr(a)
char a;
{
int s = splhigh();
promcall = 1;
asm volatile ("movb %0,sp@-" :: "d" (a));
MVMEPROM_CALL(MVMEPROM_OUTCHR);
asm volatile ("nop");
promcall = 0;
splx(s);
}
void
bug_outstr(pstrb, pstre)
char *pstrb;
char *pstre;
{
int s = splhigh();
promcall = 1;
asm volatile ("movl %0,sp@-" :: "d" (pstre));
asm volatile ("movl %0,sp@-" :: "d" (pstrb));
MVMEPROM_CALL(MVMEPROM_OUTSTR);
promcall = 0;
splx(s);
}
void
bug_outln(pstrb, pstre)
char *pstrb;
char *pstre;
{
int s = splhigh();
promcall = 1;
asm volatile ("movl %0,sp@-" :: "d" (pstre));
asm volatile ("movl %0,sp@-" :: "d" (pstrb));
MVMEPROM_CALL(MVMEPROM_OUTSTRCRLF);
promcall = 0;
splx(s);
}
/* BUG - disk routines */
#if 0
/* returns 0: success, nonzero: error */
u_int bug_drdcnt = 0;
int
bug_diskrd(arg)
bug_dskio *arg;
{
volatile int ret;
promcall = 1;
bug_drdcnt++;
asm volatile ("movl %0, sp@-" :: "d" (arg));
MVMEPROM_CALL(MVMEPROM_DSKRD);
asm volatile ("nop");
asm volatile ("movw ccr,%0" : "=d" (ret));
promcall = 0;
return (!(ret & 0x4));
}
/* returns 0: success, nonzero: error */
u_int bug_dwrcnt = 0;
int
bug_diskwr(arg)
bug_dskio *arg;
{
volatile int ret;
promcall = 1;
bug_dwrcnt ++;
asm volatile ("movl %0, sp@-" :: "d" (arg));
MVMEPROM_CALL(MVMEPROM_DSKWR);
asm volatile ("nop");
asm volatile ("movw ccr,%0" : "=d" (ret));
promcall = 0;
return (!(ret & 0x4));
}
bug_diskcfig()
{
}
bug_diskfmt()
{
}
bug_diskctrl()
{
}
#endif
/* BUG - timing routine */
void
bug_delay(delay_msec)
int delay_msec;
{
int s = splhigh();
promcall = 1;
asm volatile ("movl %0,sp@-" :: "d" (delay_msec));
MVMEPROM_CALL(MVMEPROM_DELAY);
asm volatile ("nop");
promcall = 0;
splx(s);
}
/* BUG - return to bug routine */
void
bug_return()
{
promcall = 1;
MVMEPROM_CALL(MVMEPROM_EXIT);
promcall = 0;
/*NOTREACHED*/
}
/* BUG - query board routines */
struct bug_brdid *
bug_brdid()
{
struct bug_brdid *pbrd_id;
promcall = 1;
asm volatile ("clrl sp@-");
MVMEPROM_CALL(MVMEPROM_GETBRDID);
asm volatile ("movl sp@+,%0" : "=d" (pbrd_id):);
promcall = 0;
return (pbrd_id);
}
int asm_callbuf[4];
void
bug_stat()
{
char val[] = "|/-\\";
static int cnt = 0;
bug_outchr('\b');
bug_outchr(val[cnt]);
cnt = (cnt + 1) % (sizeof(val) -1);
}
void
asm_bug_stat()
{
asm volatile ("movl a0,_asm_callbuf+0");
asm volatile ("movl a1,_asm_callbuf+4");
asm volatile ("movl d0,_asm_callbuf+8");
asm volatile ("movl d1,_asm_callbuf+12");
bug_stat();
asm volatile ("movl _asm_callbuf+0,a0");
asm volatile ("movl _asm_callbuf+4,a1");
asm volatile ("movl _asm_callbuf+8,d0");
asm volatile ("movl _asm_callbuf+12,d1");
}
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