985 строки
28 KiB
Perl
985 строки
28 KiB
Perl
#!/usr/bin/perl -s
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# NCR 53c810 script assembler
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# Sponsored by
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# iX Multiuser Multitasking Magazine
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#
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# Copyright 1993, Drew Eckhardt
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# Visionary Computing
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# (Unix and Linux consulting and custom programming)
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# drew@Colorado.EDU
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# +1 (303) 786-7975
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#
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# Support for 53c710 (via -ncr7x0_family switch) added by Richard
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# Hirst <richard@sleepie.demon.co.uk> - 15th March 1997
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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#
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# TolerANT and SCSI SCRIPTS are registered trademarks of NCR Corporation.
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#
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#
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# Basically, I follow the NCR syntax documented in the NCR53c710
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# Programmer's guide, with the new instructions, registers, etc.
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# from the NCR53c810.
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#
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# Differences between this assembler and NCR's are that
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# 1. PASS, REL (data, JUMPs work fine), and the option to start a new
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# script, are unimplemented, since I didn't use them in my scripts.
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#
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# 2. I also emit a script_u.h file, which will undefine all of
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# the A_*, E_*, etc. symbols defined in the script. This
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# makes including multiple scripts in one program easier
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#
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# 3. This is a single pass assembler, which only emits
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# .h files.
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#
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# XXX - set these with command line options
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$debug = 0; # Print general debugging messages
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$debug_external = 0; # Print external/forward reference messages
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$list_in_array = 1; # Emit original SCRIPTS assembler in comments in
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# script.h
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#$prefix; # (set by perl -s)
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# define all arrays having this prefix so we
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# don't have name space collisions after
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# assembling this file in different ways for
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# different host adapters
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# Constants
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# Table of the SCSI phase encodings
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%scsi_phases = (
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'DATA_OUT', 0x00_00_00_00, 'DATA_IN', 0x01_00_00_00, 'CMD', 0x02_00_00_00,
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'STATUS', 0x03_00_00_00, 'MSG_OUT', 0x06_00_00_00, 'MSG_IN', 0x07_00_00_00
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);
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# XXX - replace references to the *_810 constants with general constants
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# assigned at compile time based on chip type.
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# Table of operator encodings
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# XXX - NCR53c710 only implements
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# move (nop) = 0x00_00_00_00
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# or = 0x02_00_00_00
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# and = 0x04_00_00_00
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# add = 0x06_00_00_00
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if ($ncr7x0_family) {
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%operators = (
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'|', 0x02_00_00_00, 'OR', 0x02_00_00_00,
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'&', 0x04_00_00_00, 'AND', 0x04_00_00_00,
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'+', 0x06_00_00_00
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);
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}
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else {
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%operators = (
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'SHL', 0x01_00_00_00,
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'|', 0x02_00_00_00, 'OR', 0x02_00_00_00,
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'XOR', 0x03_00_00_00,
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'&', 0x04_00_00_00, 'AND', 0x04_00_00_00,
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'SHR', 0x05_00_00_00,
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# Note : low bit of the operator bit should be set for add with
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# carry.
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'+', 0x06_00_00_00
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);
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}
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# Table of register addresses
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if ($ncr7x0_family) {
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%registers = (
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'SCNTL0', 0, 'SCNTL1', 1, 'SDID', 2, 'SIEN', 3,
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'SCID', 4, 'SXFER', 5, 'SODL', 6, 'SOCL', 7,
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'SFBR', 8, 'SIDL', 9, 'SBDL', 10, 'SBCL', 11,
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'DSTAT', 12, 'SSTAT0', 13, 'SSTAT1', 14, 'SSTAT2', 15,
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'DSA0', 16, 'DSA1', 17, 'DSA2', 18, 'DSA3', 19,
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'CTEST0', 20, 'CTEST1', 21, 'CTEST2', 22, 'CTEST3', 23,
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'CTEST4', 24, 'CTEST5', 25, 'CTEST6', 26, 'CTEST7', 27,
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'TEMP0', 28, 'TEMP1', 29, 'TEMP2', 30, 'TEMP3', 31,
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'DFIFO', 32, 'ISTAT', 33, 'CTEST8', 34, 'LCRC', 35,
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'DBC0', 36, 'DBC1', 37, 'DBC2', 38, 'DCMD', 39,
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'DNAD0', 40, 'DNAD1', 41, 'DNAD2', 42, 'DNAD3', 43,
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'DSP0', 44, 'DSP1', 45, 'DSP2', 46, 'DSP3', 47,
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'DSPS0', 48, 'DSPS1', 49, 'DSPS2', 50, 'DSPS3', 51,
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'SCRATCH0', 52, 'SCRATCH1', 53, 'SCRATCH2', 54, 'SCRATCH3', 55,
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'DMODE', 56, 'DIEN', 57, 'DWT', 58, 'DCNTL', 59,
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'ADDER0', 60, 'ADDER1', 61, 'ADDER2', 62, 'ADDER3', 63,
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);
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}
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else {
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%registers = (
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'SCNTL0', 0, 'SCNTL1', 1, 'SCNTL2', 2, 'SCNTL3', 3,
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'SCID', 4, 'SXFER', 5, 'SDID', 6, 'GPREG', 7,
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'SFBR', 8, 'SOCL', 9, 'SSID', 10, 'SBCL', 11,
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'DSTAT', 12, 'SSTAT0', 13, 'SSTAT1', 14, 'SSTAT2', 15,
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'DSA0', 16, 'DSA1', 17, 'DSA2', 18, 'DSA3', 19,
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'ISTAT', 20,
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'CTEST0', 24, 'CTEST1', 25, 'CTEST2', 26, 'CTEST3', 27,
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'TEMP0', 28, 'TEMP1', 29, 'TEMP2', 30, 'TEMP3', 31,
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'DFIFO', 32, 'CTEST4', 33, 'CTEST5', 34, 'CTEST6', 35,
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'DBC0', 36, 'DBC1', 37, 'DBC2', 38, 'DCMD', 39,
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'DNAD0', 40, 'DNAD1', 41, 'DNAD2', 42, 'DNAD3', 43,
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'DSP0', 44, 'DSP1', 45, 'DSP2', 46, 'DSP3', 47,
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'DSPS0', 48, 'DSPS1', 49, 'DSPS2', 50, 'DSPS3', 51,
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'SCRATCH0', 52, 'SCRATCH1', 53, 'SCRATCH2', 54, 'SCRATCH3', 55,
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'SCRATCHA0', 52, 'SCRATCHA1', 53, 'SCRATCHA2', 54, 'SCRATCHA3', 55,
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'DMODE', 56, 'DIEN', 57, 'DWT', 58, 'DCNTL', 59,
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'ADDER0', 60, 'ADDER1', 61, 'ADDER2', 62, 'ADDER3', 63,
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'SIEN0', 64, 'SIEN1', 65, 'SIST0', 66, 'SIST1', 67,
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'SLPAR', 68, 'MACNTL', 70, 'GPCNTL', 71,
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'STIME0', 72, 'STIME1', 73, 'RESPID', 74,
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'STEST0', 76, 'STEST1', 77, 'STEST2', 78, 'STEST3', 79,
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'SIDL', 80,
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'SODL', 84,
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'SBDL', 88,
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'SCRATCHB0', 92, 'SCRATCHB1', 93, 'SCRATCHB2', 94, 'SCRATCHB3', 95
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);
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}
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# Parsing regular expressions
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$identifier = '[A-Za-z_][A-Za-z_0-9]*';
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$decnum = '-?\\d+';
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$hexnum = '0[xX][0-9A-Fa-f]+';
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$constant = "$hexnum|$decnum";
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# yucky - since we can't control grouping of # $constant, we need to
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# expand out each alternative for $value.
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$value = "$identifier|$identifier\\s*[+\-]\\s*$decnum|".
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"$identifier\\s*[+-]\s*$hexnum|$constant";
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print STDERR "value regex = $value\n" if ($debug);
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$phase = join ('|', keys %scsi_phases);
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print STDERR "phase regex = $phase\n" if ($debug);
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$register = join ('|', keys %registers);
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# yucky - since %operators includes meta-characters which must
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# be escaped, I can't use the join() trick I used for the register
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# regex
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if ($ncr7x0_family) {
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$operator = '\||OR|AND|\&|\+';
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}
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else {
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$operator = '\||OR|AND|XOR|\&|\+';
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}
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# Global variables
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%symbol_values = (%registers) ; # Traditional symbol table
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%symbol_references = () ; # Table of symbol references, where
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# the index is the symbol name,
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# and the contents a white space
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# delimited list of address,size
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# tuples where size is in bytes.
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@code = (); # Array of 32 bit words for SIOP
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@entry = (); # Array of entry point names
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@label = (); # Array of label names
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@absolute = (); # Array of absolute names
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@relative = (); # Array of relative names
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@external = (); # Array of external names
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$address = 0; # Address of current instruction
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$lineno = 0; # Line number we are parsing
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$output = 'script.h'; # Output file
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$outputu = 'scriptu.h';
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# &patch ($address, $offset, $length, $value) patches $code[$address]
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# so that the $length bytes at $offset have $value added to
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# them.
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@inverted_masks = (0x00_00_00_00, 0x00_00_00_ff, 0x00_00_ff_ff, 0x00_ff_ff_ff,
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0xff_ff_ff_ff);
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sub patch {
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local ($address, $offset, $length, $value) = @_;
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if ($debug) {
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print STDERR "Patching $address at offset $offset, length $length to $value\n";
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printf STDERR "Old code : %08x\n", $code[$address];
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}
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$mask = ($inverted_masks[$length] << ($offset * 8));
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$code[$address] = ($code[$address] & ~$mask) |
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(($code[$address] & $mask) + ($value << ($offset * 8)) &
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$mask);
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printf STDERR "New code : %08x\n", $code[$address] if ($debug);
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}
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# &parse_value($value, $word, $offset, $length) where $value is
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# an identifier or constant, $word is the word offset relative to
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# $address, $offset is the starting byte within that word, and
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# $length is the length of the field in bytes.
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#
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# Side effects are that the bytes are combined into the @code array
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# relative to $address, and that the %symbol_references table is
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# updated as appropriate.
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sub parse_value {
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local ($value, $word, $offset, $length) = @_;
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local ($tmp);
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$symbol = '';
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if ($value =~ /^REL\s*\(\s*($identifier)\s*\)\s*(.*)/i) {
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$relative = 'REL';
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$symbol = $1;
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$value = $2;
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print STDERR "Relative reference $symbol\n" if ($debug);
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} elsif ($value =~ /^($identifier)\s*(.*)/) {
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$relative = 'ABS';
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$symbol = $1;
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$value = $2;
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print STDERR "Absolute reference $symbol\n" if ($debug);
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}
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if ($symbol ne '') {
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print STDERR "Referencing symbol $1, length = $length in $_\n" if ($debug);
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$tmp = ($address + $word) * 4 + $offset;
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if ($symbol_references{$symbol} ne undef) {
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$symbol_references{$symbol} =
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"$symbol_references{$symbol} $relative,$tmp,$length";
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} else {
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if (!defined($symbol_values{$symbol})) {
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print STDERR "forward $1\n" if ($debug_external);
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$forward{$symbol} = "line $lineno : $_";
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}
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$symbol_references{$symbol} = "$relative,$tmp,$length";
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}
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}
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$value = eval $value;
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&patch ($address + $word, $offset, $length, $value);
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}
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# &parse_conditional ($conditional) where $conditional is the conditional
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# clause from a transfer control instruction (RETURN, CALL, JUMP, INT).
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sub parse_conditional {
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local ($conditional) = @_;
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if ($conditional =~ /^\s*(IF|WHEN)\s*(.*)/i) {
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$if = $1;
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$conditional = $2;
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if ($if =~ /WHEN/i) {
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$allow_atn = 0;
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$code[$address] |= 0x00_01_00_00;
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$allow_atn = 0;
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print STDERR "$0 : parsed WHEN\n" if ($debug);
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} else {
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$allow_atn = 1;
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print STDERR "$0 : parsed IF\n" if ($debug);
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}
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} else {
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die "$0 : syntax error in line $lineno : $_
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expected IF or WHEN
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";
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}
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if ($conditional =~ /^NOT\s+(.*)$/i) {
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$not = 'NOT ';
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$other = 'OR';
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$conditional = $1;
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print STDERR "$0 : parsed NOT\n" if ($debug);
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} else {
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$code[$address] |= 0x00_08_00_00;
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$not = '';
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$other = 'AND'
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}
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$need_data = 0;
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if ($conditional =~ /^ATN\s*(.*)/i) {#
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die "$0 : syntax error in line $lineno : $_
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WHEN conditional is incompatible with ATN
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" if (!$allow_atn);
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$code[$address] |= 0x00_02_00_00;
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$conditional = $1;
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print STDERR "$0 : parsed ATN\n" if ($debug);
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} elsif ($conditional =~ /^($phase)\s*(.*)/i) {
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$phase_index = "\U$1\E";
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$p = $scsi_phases{$phase_index};
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$code[$address] |= $p | 0x00_02_00_00;
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$conditional = $2;
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print STDERR "$0 : parsed phase $phase_index\n" if ($debug);
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} else {
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$other = '';
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$need_data = 1;
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}
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print STDERR "Parsing conjunction, expecting $other\n" if ($debug);
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if ($conditional =~ /^(AND|OR)\s*(.*)/i) {
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$conjunction = $1;
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$conditional = $2;
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$need_data = 1;
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die "$0 : syntax error in line $lineno : $_
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Illegal use of $1. Valid uses are
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".$not."<phase> $1 data
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".$not."ATN $1 data
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" if ($other eq '');
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die "$0 : syntax error in line $lineno : $_
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Illegal use of $conjunction. Valid syntaxes are
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NOT <phase>|ATN OR data
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<phase>|ATN AND data
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" if ($conjunction !~ /\s*$other\s*/i);
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print STDERR "$0 : parsed $1\n" if ($debug);
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}
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if ($need_data) {
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print STDERR "looking for data in $conditional\n" if ($debug);
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if ($conditional=~ /^($value)\s*(.*)/i) {
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$code[$address] |= 0x00_04_00_00;
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$conditional = $2;
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&parse_value($1, 0, 0, 1);
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print STDERR "$0 : parsed data\n" if ($debug);
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} else {
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die "$0 : syntax error in line $lineno : $_
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expected <data>.
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";
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}
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}
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if ($conditional =~ /^\s*,\s*(.*)/) {
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$conditional = $1;
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if ($conditional =~ /^AND\s\s*MASK\s\s*($value)\s*(.*)/i) {
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&parse_value ($1, 0, 1, 1);
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print STDERR "$0 parsed AND MASK $1\n" if ($debug);
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die "$0 : syntax error in line $lineno : $_
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expected end of line, not \"$2\"
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" if ($2 ne '');
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} else {
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die "$0 : syntax error in line $lineno : $_
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expected \",AND MASK <data>\", not \"$2\"
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";
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}
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} elsif ($conditional !~ /^\s*$/) {
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die "$0 : syntax error in line $lineno : $_
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expected end of line" . (($need_data) ? " or \"AND MASK <data>\"" : "") . "
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not \"$conditional\"
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";
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}
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}
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# Parse command line
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$output = shift;
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$outputu = shift;
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# Main loop
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while (<STDIN>) {
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$lineno = $lineno + 1;
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$list[$address] = $list[$address].$_;
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s/;.*$//; # Strip comments
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chop; # Leave new line out of error messages
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# Handle symbol definitions of the form label:
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if (/^\s*($identifier)\s*:(.*)/) {
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if (!defined($symbol_values{$1})) {
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$symbol_values{$1} = $address * 4; # Address is an index into
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delete $forward{$1}; # an array of longs
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push (@label, $1);
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$_ = $2;
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} else {
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die "$0 : redefinition of symbol $1 in line $lineno : $_\n";
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}
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}
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# Handle symbol definitions of the form ABSOLUTE or RELATIVE identifier =
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# value
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if (/^\s*(ABSOLUTE|RELATIVE)\s+(.*)/i) {
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$is_absolute = $1;
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$rest = $2;
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foreach $rest (split (/\s*,\s*/, $rest)) {
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if ($rest =~ /^($identifier)\s*=\s*($constant)\s*$/) {
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local ($id, $cnst) = ($1, $2);
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if ($symbol_values{$id} eq undef) {
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$symbol_values{$id} = eval $cnst;
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delete $forward{$id};
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if ($is_absolute =~ /ABSOLUTE/i) {
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push (@absolute , $id);
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} else {
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push (@relative, $id);
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}
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} else {
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die "$0 : redefinition of symbol $id in line $lineno : $_\n";
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}
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} else {
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die
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"$0 : syntax error in line $lineno : $_
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expected <identifier> = <value>
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";
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}
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}
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} elsif (/^\s*EXTERNAL\s+(.*)/i) {
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$externals = $1;
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foreach $external (split (/,/,$externals)) {
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if ($external =~ /\s*($identifier)\s*$/) {
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$external = $1;
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push (@external, $external);
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delete $forward{$external};
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if (defined($symbol_values{$external})) {
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die "$0 : redefinition of symbol $1 in line $lineno : $_\n";
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}
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$symbol_values{$external} = $external;
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print STDERR "defined external $1 to $external\n" if ($debug_external);
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} else {
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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 {
|
|
die
|
|
"$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 |
|
|
($registers{$dst_reg} << 16);
|
|
} elsif ($dst_reg =~ /SFBR/i) {
|
|
$code[$address] |= 0x30_00_00_00 |
|
|
($registers{$src_reg} << 16);
|
|
} elsif ($src_reg =~ /SFBR/i) {
|
|
$code[$address] |= 0x28_00_00_00 |
|
|
($registers{$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] |= $operators{$op};
|
|
|
|
&parse_value ($data8, 0, 1, 1);
|
|
$code[$address] |= $operators{$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 = ();
|
|
|
|
@external_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 invalid 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 invalid relative reference at $address,
|
|
size $length\n"
|
|
if ($type eq 'REL');
|
|
|
|
die
|
|
"$0 : symbol $label has invalid 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 invalid 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 $outputu for writing\n";
|
|
|
|
($_ = $0) =~ s:.*/::;
|
|
print OUTPUT "/* DO NOT EDIT - Generated automatically by ".$_." */\n";
|
|
print OUTPUT "static u32 ".$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)(.*)$/) {
|
|
push (@external_patches, $i+1, $1);
|
|
printf OUTPUT "0%s,", $2
|
|
} else {
|
|
printf OUTPUT "0x%08x,",$code[$i+1];
|
|
}
|
|
|
|
if (($code[$i] & 0xff_00_00_00) == 0xc0_00_00_00) {
|
|
if ($code[$i + 2] =~ /$identifier/) {
|
|
push (@external_patches, $i+2, $code[$i+2]);
|
|
printf OUTPUT "0,\n";
|
|
} 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 "static u32 A_".$i."_used\[\] __attribute((unused)) = {\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 "static u32 ".$prefix."LABELPATCHES[] __attribute((unused)) = {\n";
|
|
for $patch (sort {$a <=> $b} @label_patches) {
|
|
printf OUTPUT "\t0x%08x,\n", $patch;
|
|
}
|
|
printf OUTPUT "};\n\n";
|
|
|
|
$num_external_patches = 0;
|
|
printf OUTPUT "static struct {\n\tu32\toffset;\n\tvoid\t\t*address;\n".
|
|
"} ".$prefix."EXTERNAL_PATCHES[] __attribute((unused)) = {\n";
|
|
while ($ident = pop(@external_patches)) {
|
|
$off = pop(@external_patches);
|
|
printf OUTPUT "\t{0x%08x, &%s},\n", $off, $ident;
|
|
++$num_external_patches;
|
|
}
|
|
printf OUTPUT "};\n\n";
|
|
|
|
printf OUTPUT "static u32 ".$prefix."INSTRUCTIONS __attribute((unused))\t= %d;\n",
|
|
$instructions;
|
|
printf OUTPUT "static u32 ".$prefix."PATCHES __attribute((unused))\t= %d;\n",
|
|
$#label_patches+1;
|
|
printf OUTPUT "static u32 ".$prefix."EXTERNAL_PATCHES_LEN __attribute((unused))\t= %d;\n",
|
|
$num_external_patches;
|
|
close OUTPUT;
|
|
close OUTPUTU;
|