3 # NCR 53c810 script assembler
5 # iX Multiuser Multitasking Magazine
7 # Copyright 1993, Drew Eckhardt
9 # (Unix and Linux consulting and custom programming)
13 # Support for 53c710 (via -ncr7x0_family switch) added by Richard
14 # Hirst <richard@sleepie.demon.co.uk> - 15th March 1997
16 # This program is free software; you can redistribute it and/or modify
17 # it under the terms of the GNU General Public License as published by
18 # the Free Software Foundation; either version 2 of the License, or
19 # (at your option) any later version.
21 # This program is distributed in the hope that it will be useful,
22 # but WITHOUT ANY WARRANTY; without even the implied warranty of
23 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 # GNU General Public License for more details.
26 # You should have received a copy of the GNU General Public License
27 # along with this program; if not, write to the Free Software
28 # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
30 # TolerANT and SCSI SCRIPTS are registered trademarks of NCR Corporation.
34 # Basically, I follow the NCR syntax documented in the NCR53c710
35 # Programmer's guide, with the new instructions, registers, etc.
38 # Differences between this assembler and NCR's are that
39 # 1. PASS, REL (data, JUMPs work fine), and the option to start a new
40 # script, are unimplemented, since I didn't use them in my scripts.
42 # 2. I also emit a script_u.h file, which will undefine all of
43 # the A_*, E_*, etc. symbols defined in the script. This
44 # makes including multiple scripts in one program easier
46 # 3. This is a single pass assembler, which only emits
51 # XXX - set these with command line options
52 $debug = 0; # Print general debugging messages
53 $debug_external = 0; # Print external/forward reference messages
54 $list_in_array = 1; # Emit original SCRIPTS assembler in comments in
56 $prefix = ''; # define all arrays having this prefix so we
57 # don't have name space collisions after
58 # assembling this file in different ways for
59 # different host adapters
64 # Table of the SCSI phase encodings
66 'DATA_OUT', 0x00_
00_
00_
00, 'DATA_IN', 0x01_
00_
00_
00, 'CMD', 0x02_
00_
00_
00,
67 'STATUS', 0x03_
00_
00_
00, 'MSG_OUT', 0x06_
00_
00_
00, 'MSG_IN', 0x07_
00_
00_
00
70 # XXX - replace references to the *_810 constants with general constants
71 # assigned at compile time based on chip type.
73 # Table of operator encodings
74 # XXX - NCR53c710 only implements
75 # move (nop) = 0x00_00_00_00
82 '|', 0x02_
00_
00_
00, 'OR', 0x02_
00_
00_
00,
83 '&', 0x04_
00_
00_
00, 'AND', 0x04_
00_
00_
00,
90 '|', 0x02_
00_
00_
00, 'OR', 0x02_
00_
00_
00,
92 '&', 0x04_
00_
00_
00, 'AND', 0x04_
00_
00_
00,
94 # Note : low bit of the operator bit should be set for add with
100 # Table of register addresses
102 if ($ncr7x0_family) {
104 'SCNTL0', 0, 'SCNTL1', 1, 'SDID', 2, 'SIEN', 3,
105 'SCID', 4, 'SXFER', 5, 'SODL', 6, 'SOCL', 7,
106 'SFBR', 8, 'SIDL', 9, 'SBDL', 10, 'SBCL', 11,
107 'DSTAT', 12, 'SSTAT0', 13, 'SSTAT1', 14, 'SSTAT2', 15,
108 'DSA0', 16, 'DSA1', 17, 'DSA2', 18, 'DSA3', 19,
109 'CTEST0', 20, 'CTEST1', 21, 'CTEST2', 22, 'CTEST3', 23,
110 'CTEST4', 24, 'CTEST5', 25, 'CTEST6', 26, 'CTEST7', 27,
111 'TEMP0', 28, 'TEMP1', 29, 'TEMP2', 30, 'TEMP3', 31,
112 'DFIFO', 32, 'ISTAT', 33, 'CTEST8', 34, 'LCRC', 35,
113 'DBC0', 36, 'DBC1', 37, 'DBC2', 38, 'DCMD', 39,
114 'DNAD0', 40, 'DNAD1', 41, 'DNAD2', 42, 'DNAD3', 43,
115 'DSP0', 44, 'DSP1', 45, 'DSP2', 46, 'DSP3', 47,
116 'DSPS0', 48, 'DSPS1', 49, 'DSPS2', 50, 'DSPS3', 51,
117 'SCRATCH0', 52, 'SCRATCH1', 53, 'SCRATCH2', 54, 'SCRATCH3', 55,
118 'DMODE', 56, 'DIEN', 57, 'DWT', 58, 'DCNTL', 59,
119 'ADDER0', 60, 'ADDER1', 61, 'ADDER2', 62, 'ADDER3', 63,
124 'SCNTL0', 0, 'SCNTL1', 1, 'SCNTL2', 2, 'SCNTL3', 3,
125 'SCID', 4, 'SXFER', 5, 'SDID', 6, 'GPREG', 7,
126 'SFBR', 8, 'SOCL', 9, 'SSID', 10, 'SBCL', 11,
127 'DSTAT', 12, 'SSTAT0', 13, 'SSTAT1', 14, 'SSTAT2', 15,
128 'DSA0', 16, 'DSA1', 17, 'DSA2', 18, 'DSA3', 19,
130 'CTEST0', 24, 'CTEST1', 25, 'CTEST2', 26, 'CTEST3', 27,
131 'TEMP0', 28, 'TEMP1', 29, 'TEMP2', 30, 'TEMP3', 31,
132 'DFIFO', 32, 'CTEST4', 33, 'CTEST5', 34, 'CTEST6', 35,
133 'DBC0', 36, 'DBC1', 37, 'DBC2', 38, 'DCMD', 39,
134 'DNAD0', 40, 'DNAD1', 41, 'DNAD2', 42, 'DNAD3', 43,
135 'DSP0', 44, 'DSP1', 45, 'DSP2', 46, 'DSP3', 47,
136 'DSPS0', 48, 'DSPS1', 49, 'DSPS2', 50, 'DSPS3', 51,
137 'SCRATCH0', 52, 'SCRATCH1', 53, 'SCRATCH2', 54, 'SCRATCH3', 55,
138 'SCRATCHA0', 52, 'SCRATCHA1', 53, 'SCRATCHA2', 54, 'SCRATCHA3', 55,
139 'DMODE', 56, 'DIEN', 57, 'DWT', 58, 'DCNTL', 59,
140 'ADDER0', 60, 'ADDER1', 61, 'ADDER2', 62, 'ADDER3', 63,
141 'SIEN0', 64, 'SIEN1', 65, 'SIST0', 66, 'SIST1', 67,
142 'SLPAR', 68, 'MACNTL', 70, 'GPCNTL', 71,
143 'STIME0', 72, 'STIME1', 73, 'RESPID', 74,
144 'STEST0', 76, 'STEST1', 77, 'STEST2', 78, 'STEST3', 79,
148 'SCRATCHB0', 92, 'SCRATCHB1', 93, 'SCRATCHB2', 94, 'SCRATCHB3', 95
152 # Parsing regular expressions
153 $identifier = '[A-Za-z_][A-Za-z_0-9]*';
155 $hexnum = '0[xX][0-9A-Fa-f]+';
156 $constant = "$hexnum|$decnum";
158 # yucky - since we can't control grouping of # $constant, we need to
159 # expand out each alternative for $value.
161 $value = "$identifier|$identifier\\s*[+\-]\\s*$decnum|".
162 "$identifier\\s*[+-]\s*$hexnum|$constant";
164 print STDERR
"value regex = $value\n" if ($debug);
166 $phase = join ('|', keys %scsi_phases);
167 print STDERR
"phase regex = $phase\n" if ($debug);
168 $register = join ('|', keys %registers);
170 # yucky - since %operators includes meta-characters which must
171 # be escaped, I can't use the join() trick I used for the register
174 if ($ncr7x0_family) {
175 $operator = '\||OR|AND|\&|\+';
178 $operator = '\||OR|AND|XOR|\&|\+';
183 %symbol_values = (%registers) ; # Traditional symbol table
185 %symbol_references = () ; # Table of symbol references, where
186 # the index is the symbol name,
187 # and the contents a white space
188 # delimited list of address,size
189 # tuples where size is in bytes.
191 @code = (); # Array of 32 bit words for SIOP
193 @entry = (); # Array of entry point names
195 @label = (); # Array of label names
197 @absolute = (); # Array of absolute names
199 @relative = (); # Array of relative names
201 @external = (); # Array of external names
203 $address = 0; # Address of current instruction
205 $lineno = 0; # Line number we are parsing
207 $output = 'script.h'; # Output file
208 $outputu = 'scriptu.h';
210 # &patch ($address, $offset, $length, $value) patches $code[$address]
211 # so that the $length bytes at $offset have $value added to
214 @inverted_masks = (0x00_
00_
00_
00, 0x00_
00_
00_ff
, 0x00_
00_ff_ff
, 0x00_ff_ff_ff
,
218 local ($address, $offset, $length, $value) = @_;
220 print STDERR
"Patching $address at offset $offset, length $length to $value\n";
221 printf STDERR
"Old code : %08x\n", $code[$address];
224 $mask = ($inverted_masks[$length] << ($offset * 8));
226 $code[$address] = ($code[$address] & ~$mask) |
227 (($code[$address] & $mask) + ($value << ($offset * 8)) &
230 printf STDERR
"New code : %08x\n", $code[$address] if ($debug);
233 # &parse_value($value, $word, $offset, $length) where $value is
234 # an identifier or constant, $word is the word offset relative to
235 # $address, $offset is the starting byte within that word, and
236 # $length is the length of the field in bytes.
238 # Side effects are that the bytes are combined into the @code array
239 # relative to $address, and that the %symbol_references table is
240 # updated as appropriate.
243 local ($value, $word, $offset, $length) = @_;
248 if ($value =~ /^REL\s*\(\s*($identifier)\s*\)\s*(.*)/i) {
252 print STDERR
"Relative reference $symbol\n" if ($debug);
253 } elsif ($value =~ /^($identifier)\s*(.*)/) {
257 print STDERR
"Absolute reference $symbol\n" if ($debug);
261 print STDERR
"Referencing symbol $1, length = $length in $_\n" if ($debug);
262 $tmp = ($address + $word) * 4 + $offset;
263 if ($symbol_references{$symbol} ne undef) {
264 $symbol_references{$symbol} =
265 "$symbol_references{$symbol} $relative,$tmp,$length";
267 if (!defined($symbol_values{$symbol})) {
268 print STDERR
"forward $1\n" if ($debug_external);
269 $forward{$symbol} = "line $lineno : $_";
271 $symbol_references{$symbol} = "$relative,$tmp,$length";
275 $value = eval $value;
276 &patch
($address + $word, $offset, $length, $value);
279 # &parse_conditional ($conditional) where $conditional is the conditional
280 # clause from a transfer control instruction (RETURN, CALL, JUMP, INT).
282 sub parse_conditional
{
283 local ($conditional) = @_;
284 if ($conditional =~ /^\s*(IF|WHEN)\s*(.*)/i) {
287 if ($if =~ /WHEN/i) {
289 $code[$address] |= 0x00_
01_
00_
00;
291 print STDERR
"$0 : parsed WHEN\n" if ($debug);
294 print STDERR
"$0 : parsed IF\n" if ($debug);
297 die "$0 : syntax error in line $lineno : $_
302 if ($conditional =~ /^NOT\s+(.*)$/i) {
306 print STDERR
"$0 : parsed NOT\n" if ($debug);
308 $code[$address] |= 0x00_
08_
00_
00;
314 if ($conditional =~ /^ATN\s*(.*)/i) {#
315 die "$0 : syntax error in line $lineno : $_
316 WHEN conditional is incompatible with ATN
318 $code[$address] |= 0x00_
02_
00_
00;
320 print STDERR
"$0 : parsed ATN\n" if ($debug);
321 } elsif ($conditional =~ /^($phase)\s*(.*)/i) {
322 $phase_index = "\U$1\E";
323 $p = $scsi_phases{$phase_index};
324 $code[$address] |= $p | 0x00_
02_
00_
00;
326 print STDERR
"$0 : parsed phase $phase_index\n" if ($debug);
332 print STDERR
"Parsing conjunction, expecting $other\n" if ($debug);
333 if ($conditional =~ /^(AND|OR)\s*(.*)/i) {
337 die "$0 : syntax error in line $lineno : $_
338 Illegal use of $1. Valid uses are
339 ".$not."<phase> $1 data
342 die "$0 : syntax error in line $lineno : $_
343 Illegal use of $conjunction. Valid syntaxes are
344 NOT <phase>|ATN OR data
346 " if ($conjunction !~ /\s*$other\s*/i);
347 print STDERR
"$0 : parsed $1\n" if ($debug);
351 print STDERR
"looking for data in $conditional\n" if ($debug);
352 if ($conditional=~ /^($value)\s*(.*)/i) {
353 $code[$address] |= 0x00_
04_
00_
00;
355 &parse_value
($1, 0, 0, 1);
356 print STDERR
"$0 : parsed data\n" if ($debug);
358 die "$0 : syntax error in line $lineno : $_
364 if ($conditional =~ /^\s*,\s*(.*)/) {
366 if ($conditional =~ /^AND\s\s*MASK\s\s*($value)\s*(.*)/i) {
367 &parse_value
($1, 0, 1, 1);
368 print STDERR
"$0 parsed AND MASK $1\n" if ($debug);
369 die "$0 : syntax error in line $lineno : $_
370 expected end of line, not \"$2\"
373 die "$0 : syntax error in line $lineno : $_
374 expected \",AND MASK <data>\", not \"$2\"
377 } elsif ($conditional !~ /^\s*$/) {
378 die "$0 : syntax error in line $lineno : $_
379 expected end of line" . (($need_data) ?
" or \"AND MASK <data>\"" : "") . "
386 foreach $arg (@argv) {
387 if ($arg =~ /^-prefix\s*=\s*([_a-zA-Z][_a-zA-Z0-9]*)$/i) {
394 $lineno = $lineno + 1;
395 $list[$address] = $list[$address].$_;
396 s/;.*$//; # Strip comments
399 chop; # Leave new line out of error messages
401 # Handle symbol definitions of the form label:
402 if (/^\s*($identifier)\s*:(.*)/) {
403 if (!defined($symbol_values{$1})) {
404 $symbol_values{$1} = $address * 4; # Address is an index into
405 delete $forward{$1}; # an array of longs
409 die "$0 : redefinition of symbol $1 in line $lineno : $_\n";
413 # Handle symbol definitions of the form ABSOLUTE or RELATIVE identifier =
415 if (/^\s*(ABSOLUTE|RELATIVE)\s+(.*)/i) {
418 foreach $rest (split (/\s*,\s*/, $rest)) {
419 if ($rest =~ /^($identifier)\s*=\s*($constant)\s*$/) {
420 local ($id, $cnst) = ($1, $2);
421 if ($symbol_values{$id} eq undef) {
422 $symbol_values{$id} = eval $cnst;
423 delete $forward{$id};
424 if ($is_absolute =~ /ABSOLUTE/i) {
425 push (@absolute , $id);
427 push (@relative, $id);
430 die "$0 : redefinition of symbol $id in line $lineno : $_\n";
434 "$0 : syntax error in line $lineno : $_
435 expected <identifier> = <value>
439 } elsif (/^\s*EXTERNAL\s+(.*)/i) {
441 foreach $external (split (/,/,$externals)) {
442 if ($external =~ /\s*($identifier)\s*$/) {
444 push (@external, $external);
445 delete $forward{$external};
446 if (defined($symbol_values{$external})) {
447 die "$0 : redefinition of symbol $1 in line $lineno : $_\n";
449 $symbol_values{$external} = $external;
450 print STDERR
"defined external $1 to $external\n" if ($debug_external);
453 "$0 : syntax error in line $lineno : $_
454 expected <identifier>, got $external
458 # Process ENTRY identifier declarations
459 } elsif (/^\s*ENTRY\s+(.*)/i) {
460 if ($1 =~ /^($identifier)\s*$/) {
464 "$0 : syntax error in line $lineno : $_
465 expected ENTRY <identifier>
468 # Process MOVE length, address, WITH|WHEN phase instruction
469 } elsif (/^\s*MOVE\s+(.*)/i) {
471 if ($rest =~ /^FROM\s+($value)\s*,\s*(WITH|WHEN)\s+($phase)\s*$/i) {
475 print STDERR
"Parsing MOVE FROM $transfer_addr, $with_when $3\n" if ($debug);
476 $code[$address] = 0x18_
00_
00_
00 | (($with_when =~ /WITH/i) ?
477 0x00_
00_
00_
00 : 0x08_
00_
00_
00) | $scsi_phases{$scsi_phase};
478 &parse_value
($transfer_addr, 1, 0, 4);
480 } elsif ($rest =~ /^($value)\s*,\s*(PTR\s+|)($value)\s*,\s*(WITH|WHEN)\s+($phase)\s*$/i) {
486 $code[$address] = (($with_when =~ /WITH/i) ?
0x00_
00_
00_
00 :
487 0x08_
00_
00_
00) | (($ptr =~ /PTR/i) ?
(1 << 29) : 0) |
488 $scsi_phases{$scsi_phase};
489 &parse_value
($transfer_len, 0, 0, 3);
490 &parse_value
($transfer_addr, 1, 0, 4);
492 } elsif ($rest =~ /^MEMORY\s+(.*)/i) {
494 $code[$address] = 0xc0_
00_
00_
00;
495 if ($rest =~ /^($value)\s*,\s*($value)\s*,\s*($value)\s*$/) {
499 print STDERR
"Parsing MOVE MEMORY $count, $source, $dest\n" if ($debug);
500 &parse_value
($count, 0, 0, 3);
501 &parse_value
($source, 1, 0, 4);
502 &parse_value
($dest, 2, 0, 4);
503 printf STDERR
"Move memory instruction = %08x,%08x,%08x\n",
504 $code[$address], $code[$address+1], $code[$address +2] if
510 "$0 : syntax error in line $lineno : $_
511 expected <count>, <source>, <destination>
514 } elsif ($1 =~ /^(.*)\s+(TO|SHL|SHR)\s+(.*)/i) {
515 print STDERR
"Parsing register to register move\n" if ($debug);
520 $code[$address] = 0x40_
00_
00_
00;
522 $force = ($op !~ /TO/i);
525 print STDERR
"Forcing register source \n" if ($force && $debug);
527 if (!$force && $src =~
528 /^($register)\s+(-|$operator)\s+($value)\s*$/i) {
529 print STDERR
"register operand data8 source\n" if ($debug);
535 die "- is not implemented yet.\n"
537 } elsif ($src =~ /^($register)\s*$/i) {
538 print STDERR
"register source\n" if ($debug);
540 # Encode register to register move as a register | 0
546 } elsif (!$force && $src =~ /^($value)\s*$/i) {
547 print STDERR
"data8 source\n" if ($debug);
554 "$0 : syntax error in line $lineno : $_
557 <register> <operand> <data8>
561 "$0 : syntax error in line $lineno : $_
566 if ($rest =~ /^($register)\s*(.*)$/i) {
571 "$0 : syntax error in $lineno : $_
572 expected <register>, got $rest
576 if ($rest =~ /^WITH\s+CARRY\s*(.*)/i) {
579 $code[$address] |= 0x01_
00_
00_
00;
582 "$0 : syntax error in $lineno : $_
583 WITH CARRY option is incompatible with the $op operator.
588 if ($rest !~ /^\s*$/) {
590 "$0 : syntax error in $lineno : $_
591 Expected end of line, got $rest
595 print STDERR
"source = $src_reg, data = $data8 , destination = $dst_reg\n"
597 # Note that Move data8 to reg is encoded as a read-modify-write
599 if (($src_reg eq undef) || ($src_reg eq $dst_reg)) {
600 $code[$address] |= 0x38_
00_
00_
00 |
601 ($registers{$dst_reg} << 16);
602 } elsif ($dst_reg =~ /SFBR/i) {
603 $code[$address] |= 0x30_
00_
00_
00 |
604 ($registers{$src_reg} << 16);
605 } elsif ($src_reg =~ /SFBR/i) {
606 $code[$address] |= 0x28_
00_
00_
00 |
607 ($registers{$dst_reg} << 16);
610 "$0 : Illegal combination of registers in line $lineno : $_
611 Either source and destination registers must be the same,
612 or either source or destination register must be SFBR.
616 $code[$address] |= $operators{$op};
618 &parse_value
($data8, 0, 1, 1);
619 $code[$address] |= $operators{$op};
620 $code[$address + 1] = 0x00_
00_
00_
00;# Reserved
624 "$0 : syntax error in line $lineno : $_
625 expected (initiator) <length>, <address>, WHEN <phase>
626 (target) <length>, <address>, WITH <phase>
627 MEMORY <length>, <source>, <destination>
628 <expression> TO <register>
631 # Process SELECT {ATN|} id, fail_address
632 } elsif (/^\s*(SELECT|RESELECT)\s+(.*)/i) {
634 if ($rest =~ /^(ATN|)\s*($value)\s*,\s*($identifier)\s*$/i) {
638 $code[$address] = 0x40_
00_
00_
00 |
639 (($atn =~ /ATN/i) ?
0x01_
00_
00_
00 : 0);
640 $code[$address + 1] = 0x00_
00_
00_
00;
641 &parse_value
($id, 0, 2, 1);
642 &parse_value
($alt_addr, 1, 0, 4);
644 } elsif ($rest =~ /^(ATN|)\s*FROM\s+($value)\s*,\s*($identifier)\s*$/i) {
648 $code[$address] = 0x42_
00_
00_
00 |
649 (($atn =~ /ATN/i) ?
0x01_
00_
00_
00 : 0);
650 $code[$address + 1] = 0x00_
00_
00_
00;
651 &parse_value
($addr, 0, 0, 3);
652 &parse_value
($alt_addr, 1, 0, 4);
656 "$0 : syntax error in line $lineno : $_
657 expected SELECT id, alternate_address or
658 SELECT FROM address, alternate_address or
659 RESELECT id, alternate_address or
660 RESELECT FROM address, alternate_address
663 } elsif (/^\s*WAIT\s+(.*)/i) {
665 print STDERR
"Parsing WAIT $rest\n" if ($debug);
666 if ($rest =~ /^DISCONNECT\s*$/i) {
667 $code[$address] = 0x48_
00_
00_
00;
668 $code[$address + 1] = 0x00_
00_
00_
00;
670 } elsif ($rest =~ /^(RESELECT|SELECT)\s+($identifier)\s*$/i) {
672 $code[$address] = 0x50_
00_
00_
00;
673 &parse_value
($alt_addr, 1, 0, 4);
677 "$0 : syntax error in line $lineno : $_
678 expected (initiator) WAIT DISCONNECT or
679 (initiator) WAIT RESELECT alternate_address or
680 (target) WAIT SELECT alternate_address
683 # Handle SET and CLEAR instructions. Note that we should also do something
684 # with this syntax to set target mode.
685 } elsif (/^\s*(SET|CLEAR)\s+(.*)/i) {
688 $code[$address] = ($set =~ /SET/i) ?
0x58_
00_
00_
00 :
690 foreach $arg (split (/\s+AND\s+/i,$list)) {
691 if ($arg =~ /ATN/i) {
692 $code[$address] |= 0x00_
00_
00_
08;
693 } elsif ($arg =~ /ACK/i) {
694 $code[$address] |= 0x00_
00_
00_
40;
695 } elsif ($arg =~ /TARGET/i) {
696 $code[$address] |= 0x00_
00_
02_
00;
697 } elsif ($arg =~ /CARRY/i) {
698 $code[$address] |= 0x00_
00_
04_
00;
701 "$0 : syntax error in line $lineno : $_
702 expected $set followed by a AND delimited list of one or
703 more strings from the list ACK, ATN, CARRY, TARGET.
707 $code[$address + 1] = 0x00_
00_
00_
00;
709 } elsif (/^\s*(JUMP|CALL|INT)\s+(.*)/i) {
712 if ($instruction =~ /JUMP/i) {
713 $code[$address] = 0x80_
00_
00_
00;
714 } elsif ($instruction =~ /CALL/i) {
715 $code[$address] = 0x88_
00_
00_
00;
717 $code[$address] = 0x98_
00_
00_
00;
719 print STDERR
"parsing JUMP, rest = $rest\n" if ($debug);
722 if ($rest =~ /^(REL\s*\(\s*$identifier\s*\))\s*(.*)/i) {
725 print STDERR
"parsing JUMP REL, addr = $addr, rest = $rest\n" if ($debug);
726 $code[$address] |= 0x00_
80_
00_
00;
727 &parse_value
($addr, 1, 0, 4);
728 # Absolute jump, requires no more gunk
729 } elsif ($rest =~ /^($value)\s*(.*)/) {
732 &parse_value
($addr, 1, 0, 4);
735 "$0 : syntax error in line $lineno : $_
736 expected <address> or REL (address)
740 if ($rest =~ /^,\s*(.*)/) {
741 &parse_conditional
($1);
742 } elsif ($rest =~ /^\s*$/) {
743 $code[$address] |= (1 << 19);
746 "$0 : syntax error in line $lineno : $_
747 expected , <conditional> or end of line, got $1
752 } elsif (/^\s*(RETURN|INTFLY)\s*(.*)/i) {
755 print STDERR
"Parsing $instruction\n" if ($debug);
756 $code[$address] = ($instruction =~ /RETURN/i) ?
0x90_
00_
00_
00 :
758 if ($conditional =~ /^,\s*(.*)/) {
760 &parse_conditional
($conditional);
761 } elsif ($conditional !~ /^\s*$/) {
763 "$0 : syntax error in line $lineno : $_
764 expected , <conditional>
767 $code[$address] |= 0x00_
08_
00_
00;
770 $code[$address + 1] = 0x00_
00_
00_
00;
772 } elsif (/^\s*DISCONNECT\s*$/) {
773 $code[$address] = 0x48_
00_
00_
00;
774 $code[$address + 1] = 0x00_
00_
00_
00;
776 # I'm not sure that I should be including this extension, but
778 } elsif (/^\s*NOP\s*$/i) {
779 $code[$address] = 0x80_
88_
00_
00;
780 $code[$address + 1] = 0x00_
00_
00_
00;
782 # Ignore lines consisting entirely of white space
786 "$0 : syntax error in line $lineno: $_
787 expected label:, ABSOLUTE, CLEAR, DISCONNECT, EXTERNAL, MOVE, RESELECT,
793 # Fill in label references
795 @undefined = keys %forward;
796 if ($#undefined >= 0) {
797 print STDERR
"Undefined symbols : \n";
798 foreach $undef (@undefined) {
799 print STDERR
"$undef in $forward{$undef}\n";
806 @external_patches = ();
808 @absolute = sort @absolute;
810 foreach $i (@absolute) {
811 foreach $j (split (/\s+/,$symbol_references{$i})) {
812 $j =~ /(REL|ABS),(.*),(.*)/;
817 "$0 : $symbol $i has illegal relative reference at address $address,
821 &patch
($address / 4, $address % 4, $length, $symbol_values{$i});
825 foreach $external (@external) {
826 print STDERR
"checking external $external \n" if ($debug_external);
827 if ($symbol_references{$external} ne undef) {
828 for $reference (split(/\s+/,$symbol_references{$external})) {
829 $reference =~ /(REL|ABS),(.*),(.*)/;
835 "$0 : symbol $label is external, has illegal relative reference at $address,
840 "$0 : symbol $label has illegal reference at $address, size $length\n"
841 if ((($address % 4) !=0) || ($length != 4));
843 $symbol = $symbol_values{$external};
844 $add = $code[$address / 4];
846 $code[$address / 4] = $symbol;
848 $add = sprintf ("0x%08x", $add);
849 $code[$address / 4] = "$symbol + $add";
852 print STDERR
"referenced external $external at $1\n" if ($debug_external);
857 foreach $label (@label) {
858 if ($symbol_references{$label} ne undef) {
859 for $reference (split(/\s+/,$symbol_references{$label})) {
860 $reference =~ /(REL|ABS),(.*),(.*)/;
865 if ((($address % 4) !=0) || ($length != 4)) {
866 die "$0 : symbol $label has illegal reference at $1, size $2\n";
869 if ($type eq 'ABS') {
870 $code[$address / 4] += $symbol_values{$label};
871 push (@label_patches, $address / 4);
874 # - The address of the reference should be in the second and last word
876 # - Relative jumps, etc. are relative to the DSP of the _next_ instruction
878 # So, we need to add four to the address of the reference, to get
879 # the address of the next instruction, when computing the reference.
881 $tmp = $symbol_values{$label} -
884 # Relative addressing is limited to 24 bits.
885 "$0 : symbol $label is too far ($tmp) from $address to reference as
886 relative/\n" if (($tmp >= 0x80_
00_
00) || ($tmp < -0x80_
00_
00));
887 $code[$address / 4] = $tmp & 0x00_ff_ff_ff
;
893 # Output SCRIPT[] array, one instruction per line. Optionally
894 # print the original code too.
896 open (OUTPUT
, ">$output") || die "$0 : can't open $output for writing\n";
897 open (OUTPUTU
, ">$outputu") || die "$0 : can't open $outputu for writing\n";
899 print OUTPUT
"/* DO NOT EDIT - Generated automatically by ".$0." */\n";
900 print OUTPUT
"static u32 ".$prefix."SCRIPT[] = {\n";
902 for ($i = 0; $i < $#code; ) {
903 if ($list_in_array) {
904 printf OUTPUT
"/*\n$list[$i]\nat 0x%08x : */", $i;
906 printf OUTPUT
"\t0x%08x,", $code[$i];
907 printf STDERR
"Address $i = %x\n", $code[$i] if ($debug);
908 if ($code[$i + 1] =~ /\s*($identifier)(.*)$/) {
909 push (@external_patches, $i+1, $1);
910 printf OUTPUT
"0%s,", $2
912 printf OUTPUT
"0x%08x,",$code[$i+1];
915 if (($code[$i] & 0xff_
00_
00_
00) == 0xc0_
00_
00_
00) {
916 if ($code[$i + 2] =~ /$identifier/) {
917 push (@external_patches, $i+2, $code[$i+2]);
918 printf OUTPUT
"0,\n";
920 printf OUTPUT
"0x%08x,\n",$code[$i+2];
929 print OUTPUT
"};\n\n";
931 foreach $i (@absolute) {
932 printf OUTPUT
"#define A_$i\t0x%08x\n", $symbol_values{$i};
933 if (defined($prefix) && $prefix ne '') {
934 printf OUTPUT
"#define A_".$i."_used ".$prefix."A_".$i."_used\n";
935 printf OUTPUTU
"#undef A_".$i."_used\n";
937 printf OUTPUTU
"#undef A_$i\n";
939 printf OUTPUT
"static u32 A_".$i."_used\[\] __attribute((unused)) = {\n";
940 printf STDERR
"$i is used $symbol_references{$i}\n" if ($debug);
941 foreach $j (split (/\s+/,$symbol_references{$i})) {
942 $j =~ /(ABS|REL),(.*),(.*)/;
946 printf OUTPUT
"\t0x%08x,\n", $address / 4;
949 printf OUTPUT
"};\n\n";
952 foreach $i (sort @entry) {
953 printf OUTPUT
"#define Ent_$i\t0x%08x\n", $symbol_values{$i};
954 printf OUTPUTU
"#undef Ent_$i\n", $symbol_values{$i};
958 # NCR assembler outputs label patches in the form of indices into
961 printf OUTPUT
"static u32 ".$prefix."LABELPATCHES[] __attribute((unused)) = {\n";
962 for $patch (sort {$a <=> $b} @label_patches) {
963 printf OUTPUT
"\t0x%08x,\n", $patch;
965 printf OUTPUT
"};\n\n";
967 $num_external_patches = 0;
968 printf OUTPUT
"static struct {\n\tu32\toffset;\n\tvoid\t\t*address;\n".
969 "} ".$prefix."EXTERNAL_PATCHES[] __attribute((unused)) = {\n";
970 while ($ident = pop(@external_patches)) {
971 $off = pop(@external_patches);
972 printf OUTPUT
"\t{0x%08x, &%s},\n", $off, $ident;
973 ++$num_external_patches;
975 printf OUTPUT
"};\n\n";
977 printf OUTPUT
"static u32 ".$prefix."INSTRUCTIONS __attribute((unused))\t= %d;\n",
979 printf OUTPUT
"static u32 ".$prefix."PATCHES __attribute((unused))\t= %d;\n",
981 printf OUTPUT
"static u32 ".$prefix."EXTERNAL_PATCHES_LEN __attribute((unused))\t= %d;\n",
982 $num_external_patches;