37507c1bd2
operands that are set during seqeuncer program download instead of at assembly time. Convert the sequencer code to use" downloaded constants" for four run time constants that vary depending on the board type. This frees up 4 bytes of sequencer scratch ram space where these constants used to be stored and also removes the additional instructions required to load their values into the accumulator prior to using them. Remove the REJBYTE sram variable. The host driver can just as easly read the accumulator to get this value. The scratch ram savings is important as the old code used to clober the SCSICONF register on 274X cards which sits near the top of scratch ram space. The SCSICONF register controls bus termination, and clobbering it is not a good thing. Now we have 4 bytes to spare. This should fix the reported problems with cards that don't have devices attached to them failing with a stream of "Somone reset bus X" messages. Doug Ledford determined the cause of the problem, fixes by me.
251 lines
6.6 KiB
Plaintext
251 lines
6.6 KiB
Plaintext
%{
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/*
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* Lexical Analyzer for the Aic7xxx SCSI Host adapter sequencer assembler.
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*
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* Copyright (c) 1997 Justin T. Gibbs.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification, immediately at the beginning of the file.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: aicasm_scan.l,v 1.4 1997/09/03 03:44:42 gibbs Exp $
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*/
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#include <sys/types.h>
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#include <limits.h>
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#include <stdio.h>
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#include <string.h>
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#include <sysexits.h>
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#include <sys/queue.h>
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#include "aicasm.h"
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#include "aicasm_symbol.h"
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#include "y.tab.h"
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%}
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PATH [-/A-Za-z0-9_.]*[./][-/A-Za-z0-9_.]*
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WORD [A-Za-z_][-A-Za-z_0-9]*
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SPACE [ \t]+
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%x COMMENT
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%%
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\n { ++yylineno; }
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"/*" { BEGIN COMMENT; /* Enter comment eating state */ }
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<COMMENT>"/*" { fprintf(stderr, "Warning! Comment within comment."); }
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<COMMENT>\n { ++yylineno; }
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<COMMENT>[^*/\n]* ;
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<COMMENT>"*"+[^*/\n]* ;
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<COMMENT>"/"+[^*/\n]* ;
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<COMMENT>"*"+"/" { BEGIN INITIAL; }
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{SPACE} ;
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/* Register/SCB/SRAM definition keywords */
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register { return T_REGISTER; }
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const { yylval.value = FALSE; return T_CONST; }
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download { return T_DOWNLOAD; }
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address { return T_ADDRESS; }
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access_mode { return T_ACCESS_MODE; }
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RW|RO|WO {
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if (strcmp(yytext, "RW") == 0)
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yylval.value = RW;
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else if (strcmp(yytext, "RO") == 0)
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yylval.value = RO;
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else
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yylval.value = WO;
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return T_MODE;
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}
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bit { return T_BIT; }
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mask { return T_MASK; }
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alias { return T_ALIAS; }
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size { return T_SIZE; }
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scb { return T_SCB; }
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scratch_ram { return T_SRAM; }
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accumulator { return T_ACCUM; }
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allones { return T_ALLONES; }
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allzeros { return T_ALLZEROS; }
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none { return T_NONE; }
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sindex { return T_SINDEX; }
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A { return T_A; }
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/* Opcodes */
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shl { return T_SHL; }
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shr { return T_SHR; }
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ror { return T_ROR; }
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rol { return T_ROL; }
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mvi { return T_MVI; }
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mov { return T_MOV; }
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clr { return T_CLR; }
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jmp { return T_JMP; }
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jc { return T_JC; }
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jnc { return T_JNC; }
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je { return T_JE; }
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jne { return T_JNE; }
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jz { return T_JZ; }
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jnz { return T_JNZ; }
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call { return T_CALL; }
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add { return T_ADD; }
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adc { return T_ADC; }
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inc { return T_INC; }
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dec { return T_DEC; }
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stc { return T_STC; }
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clc { return T_CLC; }
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cmp { return T_CMP; }
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xor { return T_XOR; }
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test { return T_TEST;}
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and { return T_AND; }
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or { return T_OR; }
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ret { return T_RET; }
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nop { return T_NOP; }
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.if { return T_IF; }
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.else { return T_ELSE; }
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.endif { return T_ENDIF; }
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/* Allowed Symbols */
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[-+,:()~|&."{};<>[\]!] { return yytext[0]; }
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/* Number processing */
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0[0-7]* {
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yylval.value = strtol(yytext, NULL, 8);
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return T_NUMBER;
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}
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0[xX][0-9a-fA-F]+ {
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yylval.value = strtoul(yytext + 2, NULL, 16);
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return T_NUMBER;
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}
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[1-9][0-9]* {
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yylval.value = strtol(yytext, NULL, 10);
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return T_NUMBER;
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}
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/* Include Files */
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#include { return T_INCLUDE; }
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/* For parsing C include files with #define foo */
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#define { yylval.value = TRUE; return T_CONST; }
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/* Throw away macros */
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#define[^\n]*[()]+[^\n]* ;
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{PATH} { yylval.str = strdup(yytext); return T_PATH; }
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{WORD} { yylval.sym = symtable_get(yytext); return T_SYMBOL; }
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. {
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char buf[255];
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snprintf(buf, sizeof(buf), "Invalid character "
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"'%c'", yytext[0]);
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stop(buf, EX_DATAERR);
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}
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%%
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typedef struct include {
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YY_BUFFER_STATE buffer;
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int lineno;
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char *filename;
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SLIST_ENTRY(include) links;
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}include_t;
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SLIST_HEAD(, include) include_stack;
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void
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include_file(file_name, type)
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char *file_name;
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include_type type;
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{
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FILE *newfile;
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include_t *include;
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newfile = NULL;
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/* Try the current directory first */
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if (includes_search_curdir != 0 || type == SOURCE_FILE)
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newfile = fopen(file_name, "r");
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if (newfile == NULL && type != SOURCE_FILE) {
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path_entry_t include_dir;
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for (include_dir = search_path.slh_first;
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include_dir != NULL;
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include_dir = include_dir->links.sle_next) {
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char fullname[PATH_MAX];
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if ((include_dir->quoted_includes_only == TRUE)
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&& (type != QUOTED_INCLUDE))
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continue;
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snprintf(fullname, sizeof(fullname),
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"%s/%s", include_dir->directory, file_name);
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if ((newfile = fopen(fullname, "r")) != NULL)
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break;
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}
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}
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if (newfile == NULL) {
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perror(file_name);
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stop("Unable to open input file", EX_SOFTWARE);
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/* NOTREACHED */
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}
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if (type != SOURCE_FILE) {
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include = (include_t *)malloc(sizeof(include_t));
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if (include == NULL) {
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stop("Unable to allocate include stack entry",
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EX_SOFTWARE);
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/* NOTREACHED */
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}
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include->buffer = YY_CURRENT_BUFFER;
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include->lineno = yylineno;
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include->filename = yyfilename;
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SLIST_INSERT_HEAD(&include_stack, include, links);
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}
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yy_switch_to_buffer(yy_create_buffer(newfile, YY_BUF_SIZE));
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yylineno = 1;
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yyfilename = strdup(file_name);
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}
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int
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yywrap()
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{
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include_t *include;
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yy_delete_buffer(YY_CURRENT_BUFFER);
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(void)fclose(yyin);
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if (yyfilename != NULL)
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free(yyfilename);
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yyfilename = NULL;
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include = include_stack.slh_first;
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if (include != NULL) {
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yy_switch_to_buffer(include->buffer);
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yylineno = include->lineno;
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yyfilename = include->filename;
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SLIST_REMOVE_HEAD(&include_stack, links);
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free(include);
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return (0);
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}
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return (1);
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}
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