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/* $OpenBSD: bugio.c,v 1.8 2001/08/24 22:46:23 miod Exp $ */
/* Copyright (c) 1998 Steve Murphree, Jr. */
#include <sys/param.h>
#include <sys/systm.h>
#include <machine/bugio.h>
#define INCHR "0x0000"
#define INSTAT "0x0001"
#define INLN "0x0002"
#define READSTR "0x0003"
#define READLN "0x0004"
#define DSKRD "0x0010"
#define DSKWR "0x0011"
#define DSKCFIG "0x0012"
#define NETCFG "0x001A"
#define NETCTRL "0x001D"
#define OUTCHR "0x0020"
#define OUTSTR "0x0021"
#define PCRLF "0x0026"
#define TMDISP "0x0042"
#define BUGDELAY "0x0043"
#define RTC_DSP "0x0052"
#define RTC_RD "0x0053"
#define RETURN "0x0063"
#define BRD_ID "0x0070"
#define FORKMPU "0x0100"
#define BUGTRAP "0x01F0"
int ossr0, ossr1, ossr2, ossr3;
int bugsr0, bugsr1, bugsr2, bugsr3;
#define BUGCTXT() \
{ \
asm volatile ("ldcr %0, cr17" : "=r" (ossr0)); \
asm volatile ("ldcr %0, cr18" : "=r" (ossr1)); \
asm volatile ("ldcr %0, cr19" : "=r" (ossr2)); \
asm volatile ("ldcr %0, cr20" : "=r" (ossr3)); \
\
asm volatile ("stcr %0, cr17" :: "r"(bugsr0)); \
asm volatile ("stcr %0, cr18" :: "r"(bugsr1)); \
asm volatile ("stcr %0, cr19" :: "r"(bugsr2)); \
asm volatile ("stcr %0, cr20" :: "r"(bugsr3)); \
}
#define OSCTXT() \
{ \
asm volatile ("ldcr %0, cr17" : "=r" (bugsr0):: "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "r13"); \
asm volatile ("ldcr %0, cr18" : "=r" (bugsr1)); \
asm volatile ("ldcr %0, cr19" : "=r" (bugsr2)); \
asm volatile ("ldcr %0, cr20" : "=r" (bugsr3)); \
\
asm volatile ("stcr %0, cr17" :: "r"(ossr0)); \
asm volatile ("stcr %0, cr18" :: "r"(ossr1)); \
asm volatile ("stcr %0, cr19" :: "r"(ossr2)); \
asm volatile ("stcr %0, cr20" :: "r"(ossr3)); \
}
void
buginit()
{
asm volatile ("ldcr %0, cr17" : "=r" (bugsr0));
asm volatile ("ldcr %0, cr18" : "=r" (bugsr1));
asm volatile ("ldcr %0, cr19" : "=r" (bugsr2));
asm volatile ("ldcr %0, cr20" : "=r" (bugsr3));
}
char
buginchr(void)
{
register int cc;
int ret;
BUGCTXT();
asm volatile ("or r9,r0," INCHR);
asm volatile ("tb0 0,r0,0x1F0");
asm volatile ("or %0,r0,r2" : "=r" (cc) : );
ret = cc;
OSCTXT();
return ((char)ret & 0xFF);
}
void
bugoutchr(unsigned char c)
{
unsigned char cc;
if ((cc = c) == '\n') {
bugpcrlf();
return;
}
BUGCTXT();
asm("or r2,r0,%0" : : "r" (cc));
asm("or r9,r0," OUTCHR);
asm("tb0 0,r0,0x1F0");
OSCTXT();
}
/* return 1 if not empty else 0 */
int
buginstat(void)
{
register int ret;
BUGCTXT();
asm volatile ("or r9,r0," INSTAT);
asm volatile ("tb0 0,r0,0x1F0");
asm volatile ("or %0,r0,r2" : "=r" (ret) : );
OSCTXT();
return (ret & 0x4 ? 0 : 1);
}
void
bugoutstr(char *s, char *se)
{
BUGCTXT();
asm("or r9,r0," OUTSTR);
asm("tb0 0,r0,0x1F0");
OSCTXT();
}
void
bugpcrlf(void)
{
BUGCTXT();
asm("or r9,r0," PCRLF);
asm("tb0 0,r0,0x1F0");
OSCTXT();
}
/* return 0 on success */
int
bugdskrd(struct bugdisk_io *arg)
{
int ret;
BUGCTXT();
asm("or r9,r0, " DSKRD);
asm("tb0 0,r0,0x1F0");
asm("or %0,r0,r2" : "=r" (ret) : );
OSCTXT();
return ((ret&0x4) == 0x4 ? 1 : 0);
}
/* return 0 on success */
int
bugdskwr(struct bugdisk_io *arg)
{
int ret;
BUGCTXT();
asm("or r9,r0, " DSKWR);
asm("tb0 0,r0,0x1F0");
asm("or %0,r0,r2" : "=r" (ret) : );
OSCTXT();
return ((ret&0x4) == 0x4 ? 1 : 0);
}
void
bugrtcrd(struct bugrtc *rtc)
{
BUGCTXT();
asm("or r9,r0, " RTC_RD);
asm("tb0 0,r0,0x1F0");
OSCTXT();
}
void
bugdelay(int delay)
{
BUGCTXT();
asm("or r2,r0,%0" : : "r" (delay));
asm("or r9,r0, " BUGDELAY);
asm("tb0 0,r0,0x1F0");
OSCTXT();
}
int
bugfork(int cpu, unsigned address)
{
register int ret;
BUGCTXT();
asm("or r9,r0, " FORKMPU);
asm("tb0 0,r0,0x1F0");
asm volatile ("or %0,r0,r2" : "=r" (ret) : );
OSCTXT();
return(ret);
}
void
bugreturn(void)
{
BUGCTXT();
asm("or r9,r0, " RETURN);
asm("tb0 0,r0,0x1F0");
OSCTXT();
}
void
bugbrdid(struct bugbrdid *id)
{
struct bugbrdid *ptr;
BUGCTXT();
asm("or r9,r0, " BRD_ID);
asm("tb0 0,r0,0x1F0");
asm("or %0,r0,r2" : "=r" (ptr) : );
OSCTXT();
bcopy(ptr, id, sizeof(struct bugbrdid));
}
void
bugnetctrl(struct bugniocall *niocall)
{
/* BUGCTXT();*/
asm("or r2,r0,%0" : : "r" (niocall));
asm("or r9,r0, " NETCTRL);
asm("tb0 0,r0,0x1F0");
/* OSCTXT();*/
}
int
bugnetcfg(struct bugniotcall *niotcall)
{
register int ret;
/* BUGCTXT();*/
asm("or r2,r0,%0" : : "r" (niotcall));
asm("or r9,r0, " NETCTRL);
asm("tb0 0,r0,0x1F0");
asm volatile ("or %0,r0,r2" : "=r" (ret) : );
/* OSCTXT();*/
return(ret);
}
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