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Bell 32V development
[unix-history] / usr / src / standalone / ddump.c
# define RP6CYL 815 /* no. RP06 cylinders/pack */
# define RP6TRK 19 /* no. tracks/cyl */
# define RP6SEC 22 /* no. sectors/track */
# define RP6ST (RP6SEC*RP6TRK) /* no. sectors/cyl */
# define MAXSEC (RP6CYL*RP6TRK*RP6SEC) /* sectors/pack */
# define M0 0x20010000 /* phys addr MBA 0 */
# define M0_cr (M0+4) /* MBA 0 control reg addr */
# define M0_sr (M0+8) /* mba 0 status reg */
# define M0_map (M0+0x800) /* start MBA 0 map reg's */
# define M0_var (M0+0xc) /* MBA 0 virt addr reg */
# define M0_bc (M0+0x10) /* MBA 0 byte count reg */
# define MBAinit 01 /* MBA init bit */
/* */
# define RP (M0+0x400) /* base for RP06 reg's, drive 0 */
/* */
# define RP_cr 0 /* RP06 control reg offset, longword */
# define RP_sr 1 /* RP06 status reg offset */
# define RP_er1 02 /* RP error reg 1 */
# define RP_stk 5 /* RP06 sector/track reg offset */
# define RP_er2 010 /* RP error reg 2 */
# define RP_off 011 /* RP offset reg */
# define RP_cyl 012 /* RP06 cylinder reg offset */
# define RP_er3 015 /* RP error reg 3 */
/* */
# define RP_GO 1 /* go bit */
# define RP_RED 070 /* RP06 read function code */
# define RP_DC 010 /* drive clear function code */
# define RP_FMT 0x1000 /* format bit for offset reg */
# define RP_RIP 020 /* Read-in Preset RP06 function code */
# define RP_DRY 0200 /* drive ready, status reg */
# define RP_ERR 040000 /* composite error, status reg */
# define RP_MOL 0x1000 /* medium-online bit in status reg */
/* */
# define RXCS 32 /* receiver control/staus */
# define RXDB 33 /* receiver data */
# define TXCS 34 /* transmitter control/status */
# define TXDB 35 /* transmitter data */
# define RXCS_DONE 0x80 /* receiver done */
# define TXCS_RDY 0x80 /* transmitter ready */
/* */
# define BLKSIZ 512
# define MAXUNI 1
# define NL 012
# define CR 015
/* */
char input[BLKSIZ] ; /* disc input buffer */
struct { int reg , reg2 , reg3 ; } ;
int count , dskoff , dunit , error , numbyt ;
unsigned short bytoff ;
int *RPptr ; /* ptr to start of RP reg's for desired drive */
main() {
/*
* Stand-alone program to dump RP06 disk to VAX LSI console
* printer in hex format.
* User specifies disk unit, start disk block and no. of blocks.
*/
int getcon() , putstr() , a2l() , l2a() ;
putlin("ddump : disk-to-console hex dump") ;
putnl() ;
dun :
putstr("disk unit : ");
getcon(input) ;
dunit = a2l(input) ;
if ((dunit > MAXUNI) || (dunit < 0)) goto dun ;
doff :
putstr("start disk block : ") ;
if (getcon(input)) goto fini ;
dskoff = a2l(input) ;
if (dskoff < 0) goto fini ;
if (dskoff > MAXSEC-1) goto doff ;
gknt :
putstr("no. blocks : ") ;
if (getcon(input)) goto fini ;
count = a2l(input) ;
if (count < 0) goto gknt ;
if (count == 0) count = 1 ;
gbyt :
putstr("no. bytes : ") ;
if (getcon(input)) goto fini ;
numbyt = a2l(input) ;
if ((numbyt < 0) || (numbyt > BLKSIZ)) goto gbyt ;
if (numbyt == 0) numbyt = BLKSIZ ;
error = 0 ;
if (init()) goto dun ;
putlin(" HI < - - LO") ;
nullcon(3) ;
putnl() ;
while ((error == 0) && (count--)) {
if (dread()) {
putlin("disk i/o error") ;
ioerr :
error++ ;
continue ;
}
if (prblk()) {
putlin("console i/o error") ;
goto ioerr ;
}
putnl() ;
putnl() ;
dskoff++ ; /* next sector */
}
goto doff ;
fini :
return(0) ;
}
/* */
putstr(csp)
register char *csp ;
{
if (putcon(csp)) return(-1) ;
return(0) ;
}
/* */
putlin(sptr)
register char *sptr ;
{
if (putcon(sptr)) return(-1) ;
if (putnl()) return(-1) ;
return(0) ;
}
/* */
nullcon(nn)
register nn ;
{
/*
* Output 'nn' nulls to console terminal -
* used for delay.
*/
while (nn--) putc(0) ;
}
/* */
putnl()
{
if (putcon("\r\n")) return(-1) ;
return(0) ;
}
/* */
putcon(csp)
register char *csp ;
{
/*
* Function to output null-terminated string pointed to
* by 'csp' to the VAX LSI terminal.
*/
register c ;
c = 0 ;
while (c = (*csp++)) putc(c) ;
return(0) ;
}
/* */
putc(c)
{
/* wait for LSI printer to be ready */
while ((mfpr(TXCS) & TXCS_RDY) == 0) ;
/* output character */
mtpr(TXDB,c&0177) ;
}
/* */
getcon(cs)
register char *cs ;
{
/*
* Function to return char's from VAX LSI keyboard to
* char array 'cs' - input stops when CR or LF received -
* null char appended to end of input
*/
register int c , c2 ;
int getc() ;
inloop :
c = getc() ; /* get 1 char from terminal */
putc(c) ; /* echo char */
if ((c == NL) || (c == CR)) {
putc(CR) ;
putc(0) ;
putc(NL) ;
(*cs++) = '\0' ;
return(0) ;
}
else {
(*cs++) = c ;
goto inloop ;
}
}
/* */
getc()
{
/*
* Return char from VAX LSI terminal char buffer
*/
int mfpr() ;
/* Wait for receiver done (user entered char)
*/
while ((mfpr(RXCS) & RXCS_DONE) == 0) ;
return (mfpr(RXDB) & 0177) ; /* return char from receiver buffer */
}
/* */
mtpr(regno,value)
{
asm(" mtpr 8(ap),4(ap)") ;
}
/* */
mfpr(regno)
{
asm(" mfpr 4(ap),r0") ;
}
/* */
a2l(as)
register char *as ;
{
/*
* Convert null-terminated ascii string to binary
* and return value.
* 1st char in string :
* 0 -> octal
* x -> hex
* else decimal
*/
register value , base , sign , digit ;
digit = value = sign = 0 ;
base = 10 ; /* default base */
aloop :
if ((digit = (*as++)) == 0) return(value) ; /* null */
if (digit == '-') {
sign++ ;
goto aloop ;
}
if (digit == '0') base = 8 ; /* octal base */
else { if (digit == 'x') base = 16 ; /* hex base */
else value = (digit-060) ; /* 060 = '0' */
}
while (digit = (*as++)) {
if (digit < '0') return(0) ;
switch (base) {
case 8 : {
if (digit > '7') return(0) ;
digit -= 060 ;
break ;
}
case 10 : {
if (digit > '9') return(0) ;
digit -= 060 ;
break ;
}
case 16 : {
if (digit <= '9') {
digit -= 060 ;
break ;
}
if ((digit >= 'A') && (digit <= 'F')) {
digit = (digit - 0101 + 10) ;
break ;
}
if ((digit >= 'a') && (digit <= 'f')) {
digit = digit - 0141 + 10 ;
break ;
}
return(0) ;
break ;
}
}
value = (value * base) + digit ;
}
return (sign ? -value : value) ;
}
/* */
init() {
/*
* Initialization.
* Initialize MBA 0 (disk) .
* Set up MBA 0 map register to map a
* transfer of 'BLKSIZ' bytes.
*/
register int page , *mp0 ;
M0_cr->reg = MBAinit ; /* MBA 0 init */
RPptr = RP + (dunit * 32 * 4) ; /* start of RP reg's for drive */
if ((*(RPptr+RP_sr) & RP_MOL) == 0) {
putlin("unit not online") ;
return(-1) ;
}
*(RPptr+RP_cr) = RP_RIP | RP_GO ; /* drive preset - sets vv */
*(RPptr+RP_off) = RP_FMT ; /* set format bit */
bytoff = (int)(&input[0])&0777 ; /* byte offset of buffer addr */
page = ((int)&input[0] >> 9) & 07777777 ; /* start page of buffer */
mp0 = M0_map ;
(*mp0++) = 0x80000000 | page++ ;
(*mp0++) = 0x80000000 | page++ ;
(*mp0++) = 0 ;
return(0) ;
}
/* */
dread()
{
/*
* Function to read 'BLKSIZ' bytes to buffer 'input[]'.
*/
register int i , j ;
*(RPptr+RP_cr) = RP_DC | RP_GO ; /* RP06 drive clear function code */
*(RPptr+RP_cyl) = dskoff/RP6ST ; /* cylinder no. */
i = dskoff%RP6ST ;
j = (i/RP6SEC)<<8 ; /* track */
*(RPptr+RP_stk) = j | (i%RP6SEC) ; /* sector : track */
M0_bc->reg = (-BLKSIZ) ;
M0_var->reg = bytoff ; /* virt addr reg = map no. + byte off */
*(RPptr+RP_cr) = RP_RED | RP_GO ; /* read */
dwait() ; /* wait for i/o to finish */
if (derror()) return(-1) ; /* error */
return(0) ; /* normal return */
}
/* */
dwait() {
/*
* Function to wait MBA 0 RP06 disc unit to be ready.
*/
while ((*(RPptr+RP_sr)&RP_DRY) == 0) ;
}
/* */
derror()
{
/*
* Function to check for MBA 0 RP06 error.
*/
if (*(RPptr+RP_sr) & RP_ERR) return(-1) ;
return(0) ;
}
/* */
halt()
{
asm(" halt") ;
}
/* */
l2a(val,rptr)
register int val ;
register char *rptr ;
{
register int i ;
register char *tp ;
int knt ;
char tmp[20] , sign ;
knt = sign = 0 ;
if (val < 0) {
sign++ ;
val = (-val) ;
}
tp = tmp ;
loop :
knt++ ;
i = val/10 ; /* quotient & base 10 */
(*tp++) = val%10 + '0' ; /* ascii remainder */
val = i ;
if (val == 0) {
/* done dividing */
if (sign) { knt++ ; (*tp++) = '-' ; }
for (i = knt ; i ; i--)
(*rptr++) = tmp[i-1] ;
(*rptr++) = '\0' ;
return(knt) ;
}
else goto loop ;
}
/* */
echo(lngword)
register int lngword ;
{
char tmp[30] ;
l2a(lngword,tmp) ;
putlin(tmp) ;
}
/* */
prblk()
{
/*
* Print 512 bytes on VAX LSI console as hex
* characters.
* Translate bytes in 'input[]' to hex char's
* and out to console, 64 char's per line.
*/
register int i , j ;
int k ;
char c , *hp , *fr ;
char tmp[1025] , ltmp[65] ;
ltmp[64] = '\0' ;
hp = "block # \0\0\0\0\0\0\0" ;
l2a(dskoff,&hp[8]) ;
putstr(hp) ;
putnl() ;
putnl() ;
hxcnvt(input,512,tmp) ; /* convert bytes to hex char's */
j = numbyt ;
for (i = 0 ; (i < 1024) && (j > 0) ; i=+64 ) {
hp = ltmp ;
fr = (&tmp[i+63]) ;
for ( k = 32 ; k ; k--) {
(*hp++) = *(fr-1) ;
(*hp++) = (*fr--) ;
fr-- ;
}
putstr(ltmp) ;
putc(CR) ;
nullcon(5) ;
putc(NL) ;
j -= 32 ;
}
return(0) ;
}
/* */
hxcnvt(in,knt,out)
register char *in , *out ;
int knt ;
{
/*
* Convert 'knt' bytes in char array 'in' to 'knt*2'
* hex char's and store in char array 'out'.
*/
register unsigned int bit4 , byte ;
byte = 0 ;
while (knt--) {
byte = (*in++) ;
bit4 = (byte>>4) & 017 ;
(*out++) = (bit4<10?bit4+0x30:bit4+0x57) ;
bit4 = byte & 017 ;
(*out++) = (bit4<10?bit4+0x30:bit4+0x57) ;
}
return(0) ;
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.