#! /usr/local/bin/perl
# NCR 53c810 script assembler
# Sponsored by
# iX Multiuser Multitasking Magazine
#
# Copyright 1993, Drew Eckhardt
# Visionary Computing
# (Unix and Linux consulting and custom programming)
# drew@Colorado.EDU
# +1 (303) 786-7975
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
# TolerANT and SCSI SCRIPTS are registered trademarks of NCR Corporation.
#
#
# Basically, I follow the NCR syntax documented in the NCR53c710
# Programmer's guide, with the new instructions, registers, etc.
# from the NCR53c810.
#
# Differences between this assembler and NCR's are that
# 1. PASS, REL (data, JUMPs work fine), and the option to start a new
# script, are unimplemented, since I didn't use them in my scripts.
#
# 2. I also emit a script_u.h file, which will undefine all of
# the A_*, E_*, etc. symbols defined in the script. This
# makes including multiple scripts in one program easier
#
# 3. This is a single pass assembler, which only emits
# .h files.
#
# XXX - set these with command line options
$debug = 0; # Print general debugging messages
$debug_external = 0; # Print external/forward reference messages
$list_in_array = 1; # Emit original SCRIPTS assembler in comments in
# script.h
$prefix = ''; # define all arrays having this prefix so we
# don't have name space collisions after
# assembling this file in different ways for
# different host adapters
# Constants
# Table of the SCSI phase encodings
%scsi_phases = (
'DATA_OUT', 0x00_00_00_00, 'DATA_IN', 0x01_00_00_00, 'CMD', 0x02_00_00_00,
'STATUS', 0x03_00_00_00, 'MSG_OUT', 0x06_00_00_00, 'MSG_IN', 0x07_00_00_00
);
# XXX - replace references to the *_810 constants with general constants
# assigned at compile time based on chip type.
# Table of operator encodings
# XXX - NCR53c710 only implements
# move (nop) = 0x00_00_00_00
# or = 0x02_00_00_00
# and = 0x04_00_00_00
# add = 0x06_00_00_00
%operators_810 = (
'SHL', 0x01_00_00_00,
'|', 0x02_00_00_00, 'OR', 0x02_00_00_00,
'XOR', 0x03_00_00_00,
'&', 0x04_00_00_00, 'AND', 0x04_00_00_00,
'SHR', 0x05_00_00_00,
# Note : low bit of the operator bit should be set for add with
# carry.
'+', 0x06_00_00_00
);
# Table of register addresses
%registers_810 = (
'SCNTL0', 0, 'SCNTL1', 1, 'SCNTL2', 2, 'SCNTL3', 3,
'SCID', 4, 'SXFER', 5, 'SDID', 6, 'GPREG', 7,
'SFBR', 8, 'SOCL', 9, 'SSID', 10, 'SBCL', 11,
'DSTAT', 12, 'SSTAT0', 13, 'SSTAT1', 14, 'SSTAT2', 15,
'DSA0', 16, 'DSA1', 17, 'DSA2', 18, 'DSA3', 19,
'ISTAT', 20,
'CTEST0', 24, 'CTEST1', 25, 'CTEST2', 26, 'CTEST3', 27,
'TEMP0', 28, 'TEMP1', 29, 'TEMP2', 30, 'TEMP3', 31,
'DFIFO', 32, 'CTEST4', 33, 'CTEST5', 34, 'CTEST6', 35,
'DBC0', 36, 'DBC1', 37, 'DBC2', 38, 'DCMD', 39,
'DNAD0', 40, 'DNAD1', 41, 'DNAD2', 42, 'DNAD3', 43,
'DSP0', 44, 'DSP1', 45, 'DSP2', 46, 'DSP3', 47,
'DSPS0', 48, 'DSPS1', 49, 'DSPS2', 50, 'DSPS3', 51,
'SCRATCH0', 52, 'SCRATCH1', 53, 'SCRATCH2', 54, 'SCRATCH3', 55,
'SCRATCHA0', 52, 'SCRATCHA1', 53, 'SCRATCHA2', 54, 'SCRATCHA3', 55,
'DMODE', 56, 'DIEN', 57, 'DWT', 58, 'DCNTL', 59,
'ADDER0', 60, 'ADDER1', 61, 'ADDER2', 62, 'ADDER3', 63,
'SIEN0', 64, 'SIEN1', 65, 'SIST0', 66, 'SIST1', 67,
'SLPAR', 68, 'MACNTL', 70, 'GPCNTL', 71,
'STIME0', 72, 'STIME1', 73, 'RESPID', 74,
'STEST0', 76, 'STEST1', 77, 'STEST2', 78, 'STEST3', 79,
'SIDL', 80,
'SODL', 84,
'SBDL', 88,
'SCRATCHB0', 92, 'SCRATCHB1', 93, 'SCRATCHB2', 94, 'SCRATCHB3', 95
);
# Parsing regular expressions
$identifier = '[A-Za-z_][A-Za-z_0-9]*';
$decnum = '-?\\d+';
$hexnum = '0[xX][0-9A-Fa-f]+';
$constant = "$hexnum|$decnum";
# yucky - since we can't control grouping of # $constant, we need to
# expand out each alternative for $value.
$value = "$identifier|$identifier\\s*[+\-]\\s*$decnum|".
"$identifier\\s*[+-]\s*$hexnum|$constant";
print STDERR "value regex = $value\n" if ($debug);
$phase = join ('|', keys %scsi_phases);
print STDERR "phase regex = $phase\n" if ($debug);
$register = join ('|', keys %registers_810);
# yucky - since %operators_810 includes meta-characters which must
# be escaped, I can't use the join() trick I used for the register
# regex
$operator = '\||OR|AND|XOR|\&|\+';
# Global variables
%symbol_values = (%registers_810) ; # Traditional symbol table
%symbol_references = () ; # Table of symbol references, where
# the index is the symbol name,
# and the contents a white space
# delimited list of address,size
# tuples where size is in bytes.
@code = (); # Array of 32 bit words for SIOP
@entry = (); # Array of entry point names
@label = (); # Array of label names
@absolute = (); # Array of absolute names
@relative = (); # Array of relative names
@external = (); # Array of external names
$address = 0; # Address of current instruction
$lineno = 0; # Line number we are parsing
$output = 'script.h'; # Output file
$outputu = 'scriptu.h';
# &patch ($address, $offset, $length, $value) patches $code[$address]
# so that the $length bytes at $offset have $value added to
# them.
@inverted_masks = (0x00_00_00_00, 0x00_00_00_ff, 0x00_00_ff_ff, 0x00_ff_ff_ff,
0xff_ff_ff_ff);
sub patch {
local ($address, $offset, $length, $value) = @_;
if ($debug) {
print STDERR "Patching $address at offset $offset, length $length to $value\n";
printf STDERR "Old code : %08x\n", $code[$address];
}
$mask = ($inverted_masks[$length] << ($offset * 8));
$code[$address] = ($code[$address] & ~$mask) |
(($code[$address] & $mask) + ($value << ($offset * 8)) &
$mask);
printf STDERR "New code : %08x\n", $code[$address] if ($debug);
}
# &parse_value($value, $word, $offset, $length) where $value is
# an identifier or constant, $word is the word offset relative to
# $address, $offset is the starting byte within that word, and
# $length is the length of the field in bytes.
#
# Side effects are that the bytes are combined into the @code array
# relative to $address, and that the %symbol_references table is
# updated as appropriate.
sub parse_value {
local ($value, $word, $offset, $length) = @_;
local ($tmp);
$symbol = '';
if ($value =~ /^REL\s*\(\s*($identifier)\s*\)\s*(.*)/i) {
$relative = 'REL';
$symbol = $1;
$value = $2;
print STDERR "Relative reference $symbol\n" if ($debug);
} elsif ($value =~ /^($identifier)\s*(.*)/) {
$relative = 'ABS';
$symbol = $1;
$value = $2;
print STDERR "Absolute reference $symbol\n" if ($debug);
}
if ($symbol ne '') {
print STDERR "Referencing symbol $1, length = $length in $_\n" if ($debug);
$tmp = ($address + $word) * 4 + $offset;
if ($symbol_references{$symbol} ne undef) {
$symbol_references{$symbol} =
"$symbol_references{$symbol} $relative,$tmp,$length";
} else {
if (!defined($symbol_values{$symbol})) {
print STDERR "forward $1\n" if ($debug_external);
$forward{$symbol} = "line $lineno : $_";
}
$symbol_references{$symbol} = "$relative,$tmp,$length";
}
}
$value = eval $value;
&patch ($address + $word, $offset, $length, $value);
}
# &parse_conditional ($conditional) where $conditional is the conditional
# clause from a transfer control instruction (RETURN, CALL, JUMP, INT).
sub parse_conditional {
local ($conditional) = @_;
if ($conditional =~ /^\s*(IF|WHEN)\s*(.*)/i) {
$if = $1;
$conditional = $2;
if ($if =~ /WHEN/i) {
$allow_atn = 0;
$code[$address] |= 0x00_01_00_00;
$allow_atn = 0;
print STDERR "$0 : parsed WHEN\n" if ($debug);
} else {
$allow_atn = 1;
print STDERR "$0 : parsed IF\n" if ($debug);
}
} else {
die "$0 : syntax error in line $lineno : $_
expected IF or WHEN
";
}
if ($conditional =~ /^NOT\s+(.*)$/i) {
$not = 'NOT ';
$other = 'OR';
$conditional = $1;
print STDERR "$0 : parsed NOT\n" if ($debug);
} else {
$code[$address] |= 0x00_08_00_00;
$not = '';
$other = 'AND'
}
$need_data = 0;
if ($conditional =~ /^ATN\s*(.*)/i) {#
die "$0 : syntax error in line $lineno : $_
WHEN conditional is incompatible with ATN
" if (!$allow_atn);
$code[$address] |= 0x00_02_00_00;
$conditional = $1;
print STDERR "$0 : parsed ATN\n" if ($debug);
} elsif ($conditional =~ /^($phase)\s*(.*)/i) {
$phase_index = "\U$1\E";
$p = $scsi_phases{$phase_index};
$code[$address] |= $p | 0x00_02_00_00;
$conditional = $2;
print STDERR "$0 : parsed phase $phase_index\n" if ($debug);
} else {
$other = '';
$need_data = 1;
}
print STDERR "Parsing conjunction, expecting $other\n" if ($debug);
if ($conditional =~ /^(AND|OR)\s*(.*)/i) {
$conjunction = $1;
$conditional = $2;
$need_data = 1;
die "$0 : syntax error in line $lineno : $_
Illegal use of $1. Valid uses are
".$not."<phase> $1 data
".$not."ATN $1 data
" if ($other eq '');
die "$0 : syntax error in line $lineno : $_
Illegal use of $conjunction. Valid syntaxes are
NOT <phase>|ATN OR data
<phase>|ATN AND data
" if ($conjunction !~ /\s*$other\s*/i);
print STDERR "$0 : parsed $1\n" if ($debug);
}
if ($need_data) {
print STDERR "looking for data in $conditional\n" if ($debug);
if ($conditional=~ /^($value)\s*(.*)/i) {
$code[$address] |= 0x00_04_00_00;
$conditional = $2;
&parse_value($1, 0, 0, 1);
print STDERR "$0 : parsed data\n" if ($debug);
} else {
die "$0 : syntax error in line $lineno : $_
expected <data>.
";
}
}
if ($conditional =~ /^\s*,\s*(.*)/) {
$conditional = $1;
if ($conditional =~ /^AND\s\s*MASK\s\s*($value)\s*(.*)/i) {
&parse_value ($1, 0, 1, 1);
print STDERR "$0 parsed AND MASK $1\n" if ($debug);
die "$0 : syntax error in line $lineno : $_
expected end of line, not \"$2\"
" if ($2 ne '');
} else {
die "$0 : syntax error in line $lineno : $_
expected \",AND MASK <data>\", not \"$2\"
";
}
} elsif ($conditional !~ /^\s*$/) {
die "$0 : syntax error in line $lineno : $_
expected end of line" . (($need_data) ? " or \"AND MASK <data>\"" : "") . "
not \"$conditional\"
";
}
}
# Parse command line
foreach $arg (@argv) {
if ($arg =~ /^-prefix\s*=\s*([_a-zA-Z][_a-zA-Z0-9]*)$/i) {
$prefix = $1
}
}
# Main loop
while (<STDIN>) {
$lineno = $lineno + 1;
$list[$address] = $list[$address].$_;
s/;.*$//; # Strip comments
chop; # Leave new line out of error messages
# Handle symbol definitions of the form label:
if (/^\s*($identifier)\s*:(.*)/) {
if (!defined($symbol_values{$1})) {
$symbol_values{$1} = $address * 4; # Address is an index into
delete $forward{$1}; # an array of longs
push (@label, $1);
$_ = $2;
} else {
die "$0 : redefinition of symbol $1 in line $lineno : $_\n";
}
}
# Handle symbol definitions of the form ABSOLUTE or RELATIVE identifier =
# value
if (/^\s*(ABSOLUTE|RELATIVE)\s+(.*)/i) {
$is_absolute = $1;
$rest = $2;
foreach $rest (split (/\s*,\s*/, $rest)) {
if ($rest =~ /^($identifier)\s*=\s*($constant)\s*$/) {
local ($id, $cnst) = ($1, $2);
if ($symbol_values{$id} eq undef) {
$symbol_values{$id} = eval $cnst;
delete $forward{$id};
if ($is_absolute =~ /ABSOLUTE/i) {
push (@absolute , $id);
} else {
push (@relative, $id);
}
} else {
die "$0 : redefinition of symbol $id in line $lineno : $_\n";
}
} else {
die
"$0 : syntax error in line $lineno : $_
expected <identifier> = <value>
";
}
}
} elsif (/^\s*EXTERNAL\s+(.*)/i) {
$externals = $1;
foreach $external (split (/,/,$externals)) {
if ($external =~ /\s*($identifier)\s*$/) {
$external = $1;
push (@external, $external);
delete $forward{$external};
if (defined($symbol_values{$external})) {
die "$0 : redefinition of symbol $1 in line $lineno : $_\n";
}
$symbol_values{$external} = $external;
print STDERR "defined external $1 to $external\n" if ($debug_external);
} else {
die
"$0 : syntax error in line $lineno : $_
expected <identifier>, got $external
";
}
}
# Process ENTRY identifier declarations
} elsif (/^\s*ENTRY\s+(.*)/i) {
if ($1 =~ /^($identifier)\s*$/) {
push (@entry, $1);
} else {
"$0 : syntax error in line $lineno : $_
expected ENTRY <identifier>
";
}
# Process MOVE length, address, WITH|WHEN phase instruction
} elsif (/^\s*MOVE\s+(.*)/i) {
$rest = $1;
if ($rest =~ /^FROM\s+($value)\s*,\s*(WITH|WHEN)\s+($phase)\s*$/i) {
$transfer_addr = $1;
$with_when = $2;
$scsi_phase = $3;
print STDERR "Parsing MOVE FROM $transfer_addr, $with_when $3\n" if ($debug);
$code[$address] = 0x18_00_00_00 | (($with_when =~ /WITH/i) ?
0x00_00_00_00 : 0x08_00_00_00) | $scsi_phases{$scsi_phase};
&parse_value ($transfer_addr, 1, 0, 4);
$address += 2;
} elsif ($rest =~ /^($value)\s*,\s*(PTR\s+|)($value)\s*,\s*(WITH|WHEN)\s+($phase)\s*$/i) {
$transfer_len = $1;
$ptr = $2;
$transfer_addr = $3;
$with_when = $4;
$scsi_phase = $5;
$code[$address] = (($with_when =~ /WITH/i) ? 0x00_00_00_00 :
0x08_00_00_00) | (($ptr =~ /PTR/i) ? (1 << 29) : 0) |
$scsi_phases{$scsi_phase};
&parse_value ($transfer_len, 0, 0, 3);
&parse_value ($transfer_addr, 1, 0, 4);
$address += 2;
} elsif ($rest =~ /^MEMORY\s+(.*)/i) {
$rest = $1;
$code[$address] = 0xc0_00_00_00;
if ($rest =~ /^($value)\s*,\s*($value)\s*,\s*($value)\s*$/) {
$count = $1;
$source = $2;
$dest = $3;
print STDERR "Parsing MOVE MEMORY $count, $source, $dest\n" if ($debug);
&parse_value ($count, 0, 0, 3);
&parse_value ($source, 1, 0, 4);
&parse_value ($dest, 2, 0, 4);
printf STDERR "Move memory instruction = %08x,%08x,%08x\n",
$code[$address], $code[$address+1], $code[$address +2] if
($debug);
$address += 3;
} else {
die
"$0 : syntax error in line $lineno : $_
expected <count>, <source>, <destination>
"
}
} elsif ($1 =~ /^(.*)\s+(TO|SHL|SHR)\s+(.*)/i) {
print STDERR "Parsing register to register move\n" if ($debug);
$src = $1;
$op = "\U$2\E";
$rest = $3;
$code[$address] = 0x40_00_00_00;
$force = ($op !~ /TO/i);
print STDERR "Forcing register source \n" if ($force && $debug);
if (!$force && $src =~
/^($register)\s+(-|$operator)\s+($value)\s*$/i) {
print STDERR "register operand data8 source\n" if ($debug);
$src_reg = "\U$1\E";
$op = "\U$2\E";
if ($op ne '-') {
$data8 = $3;
} else {
die "- is not implemented yet.\n"
}
} elsif ($src =~ /^($register)\s*$/i) {
print STDERR "register source\n" if ($debug);
$src_reg = "\U$1\E";
# Encode register to register move as a register | 0
# move to register.
if (!$force) {
$op = '|';
}
$data8 = 0;
} elsif (!$force && $src =~ /^($value)\s*$/i) {
print STDERR "data8 source\n" if ($debug);
$src_reg = undef;
$op = 'NONE';
$data8 = $1;
} else {
if (!$force) {
die
"$0 : syntax error in line $lineno : $_
expected <register>
<data8>
<register> <operand> <data8>
";
} else {
die
"$0 : syntax error in line $lineno : $_
expected <register>
";
}
}
if ($rest =~ /^($register)\s*(.*)$/i) {
$dst_reg = "\U$1\E";
$rest = $2;
} else {
die
"$0 : syntax error in $lineno : $_
expected <register>, got $rest
";
}
if ($rest =~ /^WITH\s+CARRY\s*(.*)/i) {
$rest = $1;
if ($op eq '+') {
$code[$address] |= 0x01_00_00_00;
} else {
die
"$0 : syntax error in $lineno : $_
WITH CARRY option is incompatible with the $op operator.
";
}
}
if ($rest !~ /^\s*$/) {
die
"$0 : syntax error in $lineno : $_
Expected end of line, got $rest
";
}
print STDERR "source = $src_reg, data = $data8 , destination = $dst_reg\n"
if ($debug);
# Note that Move data8 to reg is encoded as a read-modify-write
# instruction.
if (($src_reg eq undef) || ($src_reg eq $dst_reg)) {
$code[$address] |= 0x38_00_00_00 |
($registers_810{$dst_reg} << 16);
} elsif ($dst_reg =~ /SFBR/i) {
$code[$address] |= 0x30_00_00_00 |
($registers_810{$src_reg} << 16);
} elsif ($src_reg =~ /SFBR/i) {
$code[$address] |= 0x28_00_00_00 |
($registers_810{$dst_reg} << 16);
} else {
die
"$0 : Illegal combination of registers in line $lineno : $_
Either source and destination registers must be the same,
or either source or destination register must be SFBR.
";
}
$code[$address] |= $operators_810{$op};
&parse_value ($data8, 0, 1, 1);
$code[$address] |= $operators_810{$op};
$code[$address + 1] = 0x00_00_00_00;# Reserved
$address += 2;
} else {
die
"$0 : syntax error in line $lineno : $_
expected (initiator) <length>, <address>, WHEN <phase>
(target) <length>, <address>, WITH <phase>
MEMORY <length>, <source>, <destination>
<expression> TO <register>
";
}
# Process SELECT {ATN|} id, fail_address
} elsif (/^\s*(SELECT|RESELECT)\s+(.*)/i) {
$rest = $2;
if ($rest =~ /^(ATN|)\s*($value)\s*,\s*($identifier)\s*$/i) {
$atn = $1;
$id = $2;
$alt_addr = $3;
$code[$address] = 0x40_00_00_00 |
(($atn =~ /ATN/i) ? 0x01_00_00_00 : 0);
$code[$address + 1] = 0x00_00_00_00;
&parse_value($id, 0, 2, 1);
&parse_value($alt_addr, 1, 0, 4);
$address += 2;
} elsif ($rest =~ /^(ATN|)\s*FROM\s+($value)\s*,\s*($identifier)\s*$/i) {
$atn = $1;
$addr = $2;
$alt_addr = $3;
$code[$address] = 0x42_00_00_00 |
(($atn =~ /ATN/i) ? 0x01_00_00_00 : 0);
$code[$address + 1] = 0x00_00_00_00;
&parse_value($addr, 0, 0, 3);
&parse_value($alt_addr, 1, 0, 4);
$address += 2;
} else {
die
"$0 : syntax error in line $lineno : $_
expected SELECT id, alternate_address or
SELECT FROM address, alternate_address or
RESELECT id, alternate_address or
RESELECT FROM address, alternate_address
";
}
} elsif (/^\s*WAIT\s+(.*)/i) {
$rest = $1;
print STDERR "Parsing WAIT $rest\n" if ($debug);
if ($rest =~ /^DISCONNECT\s*$/i) {
$code[$address] = 0x48_00_00_00;
$code[$address + 1] = 0x00_00_00_00;
$address += 2;
} elsif ($rest =~ /^(RESELECT|SELECT)\s+($identifier)\s*$/i) {
$alt_addr = $2;
$code[$address] = 0x50_00_00_00;
&parse_value ($alt_addr, 1, 0, 4);
$address += 2;
} else {
die
"$0 : syntax error in line $lineno : $_
expected (initiator) WAIT DISCONNECT or
(initiator) WAIT RESELECT alternate_address or
(target) WAIT SELECT alternate_address
";
}
# Handle SET and CLEAR instructions. Note that we should also do something
# with this syntax to set target mode.
} elsif (/^\s*(SET|CLEAR)\s+(.*)/i) {
$set = $1;
$list = $2;
$code[$address] = ($set =~ /SET/i) ? 0x58_00_00_00 :
0x60_00_00_00;
foreach $arg (split (/\s+AND\s+/i,$list)) {
if ($arg =~ /ATN/i) {
$code[$address] |= 0x00_00_00_08;
} elsif ($arg =~ /ACK/i) {
$code[$address] |= 0x00_00_00_40;
} elsif ($arg =~ /TARGET/i) {
$code[$address] |= 0x00_00_02_00;
} elsif ($arg =~ /CARRY/i) {
$code[$address] |= 0x00_00_04_00;
} else {
die
"$0 : syntax error in line $lineno : $_
expected $set followed by a AND delimited list of one or
more strings from the list ACK, ATN, CARRY, TARGET.
";
}
}
$code[$address + 1] = 0x00_00_00_00;
$address += 2;
} elsif (/^\s*(JUMP|CALL|INT)\s+(.*)/i) {
$instruction = $1;
$rest = $2;
if ($instruction =~ /JUMP/i) {
$code[$address] = 0x80_00_00_00;
} elsif ($instruction =~ /CALL/i) {
$code[$address] = 0x88_00_00_00;
} else {
$code[$address] = 0x98_00_00_00;
}
print STDERR "parsing JUMP, rest = $rest\n" if ($debug);
# Relative jump.
if ($rest =~ /^(REL\s*\(\s*$identifier\s*\))\s*(.*)/i) {
$addr = $1;
$rest = $2;
print STDERR "parsing JUMP REL, addr = $addr, rest = $rest\n" if ($debug);
$code[$address] |= 0x00_80_00_00;
&parse_value($addr, 1, 0, 4);
# Absolute jump, requires no more gunk
} elsif ($rest =~ /^($value)\s*(.*)/) {
$addr = $1;
$rest = $2;
&parse_value($addr, 1, 0, 4);
} else {
die
"$0 : syntax error in line $lineno : $_
expected <address> or REL (address)
";
}
if ($rest =~ /^,\s*(.*)/) {
&parse_conditional($1);
} elsif ($rest =~ /^\s*$/) {
$code[$address] |= (1 << 19);
} else {
die
"$0 : syntax error in line $lineno : $_
expected , <conditional> or end of line, got $1
";
}
$address += 2;
} elsif (/^\s*(RETURN|INTFLY)\s*(.*)/i) {
$instruction = $1;
$conditional = $2;
print STDERR "Parsing $instruction\n" if ($debug);
$code[$address] = ($instruction =~ /RETURN/i) ? 0x90_00_00_00 :
0x98_10_00_00;
if ($conditional =~ /^,\s*(.*)/) {
$conditional = $1;
&parse_conditional ($conditional);
} elsif ($conditional !~ /^\s*$/) {
die
"$0 : syntax error in line $lineno : $_
expected , <conditional>
";
} else {
$code[$address] |= 0x00_08_00_00;
}
$code[$address + 1] = 0x00_00_00_00;
$address += 2;
} elsif (/^\s*DISCONNECT\s*$/) {
$code[$address] = 0x48_00_00_00;
$code[$address + 1] = 0x00_00_00_00;
$address += 2;
# I'm not sure that I should be including this extension, but
# what the hell?
} elsif (/^\s*NOP\s*$/i) {
$code[$address] = 0x80_88_00_00;
$code[$address + 1] = 0x00_00_00_00;
$address += 2;
# Ignore lines consisting entirely of white space
} elsif (/^\s*$/) {
} else {
die
"$0 : syntax error in line $lineno: $_
expected label:, ABSOLUTE, CLEAR, DISCONNECT, EXTERNAL, MOVE, RESELECT,
SELECT SET, or WAIT
";
}
}
# Fill in label references
@undefined = keys %forward;
if ($#undefined >= 0) {
print STDERR "Undefined symbols : \n";
foreach $undef (@undefined) {
print STDERR "$undef in $forward{$undef}\n";
}
exit 1;
}
@label_patches = ();
@absolute = sort @absolute;
foreach $i (@absolute) {
foreach $j (split (/\s+/,$symbol_references{$i})) {
$j =~ /(REL|ABS),(.*),(.*)/;
$type = $1;
$address = $2;
$length = $3;
die
"$0 : $symbol $i has illegal relative reference at address $address,
size $length\n"
if ($type eq 'REL');
&patch ($address / 4, $address % 4, $length, $symbol_values{$i});
}
}
foreach $external (@external) {
print STDERR "checking external $external \n" if ($debug_external);
if ($symbol_references{$external} ne undef) {
for $reference (split(/\s+/,$symbol_references{$external})) {
$reference =~ /(REL|ABS),(.*),(.*)/;
$type = $1;
$address = $2;
$length = $3;
die
"$0 : symbol $label is external, has illegal relative reference at $address,
size $length\n"
if ($type eq 'REL');
die
"$0 : symbol $label has illegal reference at $address, size $length\n"
if ((($address % 4) !=0) || ($length != 4));
$symbol = $symbol_values{$external};
$add = $code[$address / 4];
if ($add eq 0) {
$code[$address / 4] = $symbol;
} else {
$add = sprintf ("0x%08x", $add);
$code[$address / 4] = "$symbol + $add";
}
print STDERR "referenced external $external at $1\n" if ($debug_external);
}
}
}
foreach $label (@label) {
if ($symbol_references{$label} ne undef) {
for $reference (split(/\s+/,$symbol_references{$label})) {
$reference =~ /(REL|ABS),(.*),(.*)/;
$type = $1;
$address = $2;
$length = $3;
if ((($address % 4) !=0) || ($length != 4)) {
die "$0 : symbol $label has illegal reference at $1, size $2\n";
}
if ($type eq 'ABS') {
$code[$address / 4] += $symbol_values{$label};
push (@label_patches, $address / 4);
} else {
#
# - The address of the reference should be in the second and last word
# of an instruction
# - Relative jumps, etc. are relative to the DSP of the _next_ instruction
#
# So, we need to add four to the address of the reference, to get
# the address of the next instruction, when computing the reference.
$tmp = $symbol_values{$label} -
($address + 4);
die
# Relative addressing is limited to 24 bits.
"$0 : symbol $label is too far ($tmp) from $address to reference as
relative/\n" if (($tmp >= 0x80_00_00) || ($tmp < -0x80_00_00));
$code[$address / 4] = $tmp & 0x00_ff_ff_ff;
}
}
}
}
# Output SCRIPT[] array, one instruction per line. Optionally
# print the original code too.
open (OUTPUT, ">$output") || die "$0 : can't open $output for writing\n";
open (OUTPUTU, ">$outputu") || die "$0 : can't open $outputu for writing\n";
print OUTPUT "unsigned long ".$prefix."SCRIPT[] = {\n";
$instructions = 0;
for ($i = 0; $i < $#code; ) {
if ($list_in_array) {
printf OUTPUT "/*\n$list[$i]\nat 0x%08x : */", $i;
}
printf OUTPUT "\t0x%08x,", $code[$i];
printf STDERR "Address $i = %x\n", $code[$i] if ($debug);
if ($code[$i + 1] =~ /\s*($identifier)(.*)$/) {
printf OUTPUT "((unsigned long)&%s)%s,", $1, $2
} else {
printf OUTPUT "0x%08x,",$code[$i+1];
}
if (($code[$i] & 0xff_00_00_00) == 0xc0_00_00_00) {
if ($code[$i + 2] =~ /$identifier/) {
printf OUTPUT "(unsigned long)&%s,\n",$code[$i+2];
} else {
printf OUTPUT "0x%08x,\n",$code[$i+2];
}
$i += 3;
} else {
printf OUTPUT "\n";
$i += 2;
}
$instructions += 1;
}
print OUTPUT "};\n\n";
foreach $i (@absolute) {
printf OUTPUT "#define A_$i\t0x%08x\n", $symbol_values{$i};
if (defined($prefix) && $prefix ne '') {
printf OUTPUT "#define A_".$i."_used ".$prefix."A_".$i."_used\n";
printf OUTPUTU "#undef A_".$i."_used\n";
}
printf OUTPUTU "#undef A_$i\n";
printf OUTPUT "unsigned long A_".$i."_used\[\] = {\n";
printf STDERR "$i is used $symbol_references{$i}\n" if ($debug);
foreach $j (split (/\s+/,$symbol_references{$i})) {
$j =~ /(ABS|REL),(.*),(.*)/;
if ($1 eq 'ABS') {
$address = $2;
$length = $3;
printf OUTPUT "\t0x%08x,\n", $address / 4;
}
}
printf OUTPUT "};\n\n";
}
foreach $i (sort @entry) {
printf OUTPUT "#define Ent_$i\t0x%08x\n", $symbol_values{$i};
printf OUTPUTU "#undef Ent_$i\n", $symbol_values{$i};
}
#
# NCR assembler outputs label patches in the form of indices into
# the code.
#
printf OUTPUT "unsigned long ".$prefix."LABELPATCHES[] = {\n";
for $patch (sort {$a <=> $b} @label_patches) {
printf OUTPUT "\t0x%08x,\n", $patch;
}
printf OUTPUT "};\n\n";
printf OUTPUT "unsigned long ".$prefix."INSTRUCTIONS\t= 0x%08x;\n",
$instructions;
printf OUTPUT "unsigned long ".$prefix."PATCHES\t= 0x%08x;\n",
$#label_patches+1;
close OUTPUT;
close OUTPUTU;
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*/
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