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freebsd-dev/sys/dev/aic7xxx/aicasm_gram.y
Justin T. Gibbs 37507c1bd2 Add support to aicasm for "downloaded constants". These are immediate 
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.
1997-09-27 19:37:31 +00:00

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%{
/*
* Parser for the Aic7xxx SCSI Host adapter sequencer assembler.
*
* Copyright (c) 1997 Justin T. Gibbs.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: aicasm_gram.y,v 1.3 1997/09/03 03:44:40 gibbs Exp $
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <sys/types.h>
#include <sys/queue.h>
#include "aicasm.h"
#include "aicasm_symbol.h"
#include "sequencer.h"
int yylineno;
char *yyfilename;
static symbol_t *cur_symbol;
static symtype cur_symtype;
static symbol_t *accumulator;
static symbol_ref_t allones;
static symbol_ref_t allzeros;
static symbol_ref_t none;
static symbol_ref_t sindex;
static int instruction_ptr;
static int sram_or_scb_offset;
static int download_constant_count;
static patch_t *cur_patch;
static void process_bitmask __P((int mask_type, symbol_t *sym, int mask));
static void initialize_symbol __P((symbol_t *symbol));
static void process_register __P((symbol_t **p_symbol));
static void format_1_instr __P((int opcode, symbol_ref_t *dest,
expression_t *immed, symbol_ref_t *src,
int ret));
static void format_2_instr __P((int opcode, symbol_ref_t *dest,
expression_t *places, symbol_ref_t *src,
int ret));
static void format_3_instr __P((int opcode, symbol_ref_t *src,
expression_t *immed, symbol_ref_t *address));
static void test_readable_symbol __P((symbol_t *symbol));
static void test_writable_symbol __P((symbol_t *symbol));
static void type_check __P((symbol_t *symbol, expression_t *expression,
int and_op));
static void make_expression __P((expression_t *immed, int value));
static void add_conditional __P((symbol_t *symbol));
static int is_download_const __P((expression_t *immed));
#define YYDEBUG 1
#define SRAM_SYMNAME "SRAM_BASE"
#define SCB_SYMNAME "SCB_BASE"
%}
%union {
int value;
char *str;
symbol_t *sym;
symbol_ref_t sym_ref;
expression_t expression;
}
%token T_REGISTER
%token <value> T_CONST
%token T_DOWNLOAD
%token T_SCB
%token T_SRAM
%token T_ALIAS
%token T_SIZE
%token <value> T_ADDRESS
%token T_ACCESS_MODE
%token <value> T_MODE
%token T_BIT
%token T_MASK
%token <value> T_NUMBER
%token <str> T_PATH
%token T_EOF T_INCLUDE
%token <value> T_SHR T_SHL T_ROR T_ROL
%token <value> T_MVI T_MOV T_CLR
%token <value> T_JMP T_JC T_JNC T_JE T_JNE T_JNZ T_JZ T_CALL
%token <value> T_ADD T_ADC
%token <value> T_INC T_DEC
%token <value> T_STC T_CLC
%token <value> T_CMP T_XOR
%token <value> T_TEST T_AND
%token <value> T_OR
%token T_RET
%token T_NOP
%token T_ACCUM T_ALLONES T_ALLZEROS T_NONE T_SINDEX
%token T_A
%token <sym> T_SYMBOL
%token T_NL
%token T_IF T_ELSE T_ENDIF
%type <sym_ref> reg_symbol address destination source opt_source
%type <expression> expression immediate immediate_or_a
%type <value> ret f1_opcode f2_opcode jmp_jc_jnc_call jz_jnz je_jne
%type <value> numerical_value
%left '|'
%left '&'
%left '+' '-'
%right '~'
%nonassoc UMINUS
%%
program:
include
| program include
| register
| program register
| constant
| program constant
| scratch_ram
| program scratch_ram
| scb
| program scb
| label
| program label
| conditional
| program conditional
| code
| program code
;
include:
T_INCLUDE '<' T_PATH '>'
{ include_file($3, BRACKETED_INCLUDE); }
| T_INCLUDE '"' T_PATH '"'
{ include_file($3, QUOTED_INCLUDE); }
;
register:
T_REGISTER { cur_symtype = REGISTER; } reg_definition
;
reg_definition:
T_SYMBOL '{'
{
if ($1->type != UNINITIALIZED) {
stop("Register multiply defined", EX_DATAERR);
/* NOTREACHED */
}
cur_symbol = $1;
cur_symbol->type = cur_symtype;
initialize_symbol(cur_symbol);
}
reg_attribute_list
'}'
{
/*
* Default to allowing everything in for registers
* with no bit or mask definitions.
*/
if (cur_symbol->info.rinfo->valid_bitmask == 0)
cur_symbol->info.rinfo->valid_bitmask = 0xFF;
if (cur_symbol->info.rinfo->size == 0)
cur_symbol->info.rinfo->size = 1;
/*
* This might be useful for registers too.
*/
if (cur_symbol->type != REGISTER) {
if (cur_symbol->info.rinfo->address == 0)
cur_symbol->info.rinfo->address =
sram_or_scb_offset;
sram_or_scb_offset +=
cur_symbol->info.rinfo->size;
}
cur_symbol = NULL;
}
;
reg_attribute_list:
reg_attribute
| reg_attribute_list reg_attribute
;
reg_attribute:
reg_address
| size
| access_mode
| bit_defn
| mask_defn
| alias
| accumulator
| allones
| allzeros
| none
| sindex
;
reg_address:
T_ADDRESS T_NUMBER
{
cur_symbol->info.rinfo->address = $2;
}
;
size:
T_SIZE T_NUMBER
{
cur_symbol->info.rinfo->size = $2;
}
;
access_mode:
T_ACCESS_MODE T_MODE
{
cur_symbol->info.rinfo->mode = $2;
}
;
bit_defn:
T_BIT T_SYMBOL T_NUMBER
{
process_bitmask(BIT, $2, $3);
}
;
mask_defn:
T_MASK T_SYMBOL expression
{
process_bitmask(MASK, $2, $3.value);
}
;
alias:
T_ALIAS T_SYMBOL
{
if ($2->type != UNINITIALIZED) {
stop("Re-definition of register alias",
EX_DATAERR);
/* NOTREACHED */
}
$2->type = ALIAS;
initialize_symbol($2);
$2->info.ainfo->parent = cur_symbol;
}
;
accumulator:
T_ACCUM
{
if (accumulator != NULL) {
stop("Only one accumulator definition allowed",
EX_DATAERR);
/* NOTREACHED */
}
accumulator = cur_symbol;
}
;
allones:
T_ALLONES
{
if (allones.symbol != NULL) {
stop("Only one definition of allones allowed",
EX_DATAERR);
/* NOTREACHED */
}
allones.symbol = cur_symbol;
}
;
allzeros:
T_ALLZEROS
{
if (allzeros.symbol != NULL) {
stop("Only one definition of allzeros allowed",
EX_DATAERR);
/* NOTREACHED */
}
allzeros.symbol = cur_symbol;
}
;
none:
T_NONE
{
if (none.symbol != NULL) {
stop("Only one definition of none allowed",
EX_DATAERR);
/* NOTREACHED */
}
none.symbol = cur_symbol;
}
;
sindex:
T_SINDEX
{
if (sindex.symbol != NULL) {
stop("Only one definition of sindex allowed",
EX_DATAERR);
/* NOTREACHED */
}
sindex.symbol = cur_symbol;
}
;
expression:
expression '|' expression
{
$$.value = $1.value | $3.value;
symlist_merge(&$$.referenced_syms,
&$1.referenced_syms,
&$3.referenced_syms);
}
| expression '&' expression
{
$$.value = $1.value & $3.value;
symlist_merge(&$$.referenced_syms,
&$1.referenced_syms,
&$3.referenced_syms);
}
| expression '+' expression
{
$$.value = $1.value + $3.value;
symlist_merge(&$$.referenced_syms,
&$1.referenced_syms,
&$3.referenced_syms);
}
| expression '-' expression
{
$$.value = $1.value - $3.value;
symlist_merge(&($$.referenced_syms),
&($1.referenced_syms),
&($3.referenced_syms));
}
| '(' expression ')'
{
$$ = $2;
}
| '~' expression
{
$$ = $2;
$$.value = (~$$.value) & 0xFF;
}
| '-' expression %prec UMINUS
{
$$ = $2;
$$.value = -$$.value;
}
| T_NUMBER
{
$$.value = $1;
SLIST_INIT(&$$.referenced_syms);
}
| T_SYMBOL
{
symbol_t *symbol;
symbol = $1;
switch (symbol->type) {
case ALIAS:
symbol = $1->info.ainfo->parent;
case REGISTER:
case SCBLOC:
case SRAMLOC:
$$.value = symbol->info.rinfo->address;
break;
case MASK:
case BIT:
$$.value = symbol->info.minfo->mask;
break;
case DOWNLOAD_CONST:
case CONST:
$$.value = symbol->info.cinfo->value;
break;
case UNINITIALIZED:
default:
{
char buf[255];
snprintf(buf, sizeof(buf),
"Undefined symbol %s referenced",
symbol->name);
stop(buf, EX_DATAERR);
/* NOTREACHED */
break;
}
}
SLIST_INIT(&$$.referenced_syms);
symlist_add(&$$.referenced_syms, symbol, SYMLIST_INSERT_HEAD);
}
;
constant:
T_CONST T_SYMBOL numerical_value
{
if ($2->type != UNINITIALIZED) {
stop("Re-definition of symbol as a constant",
EX_DATAERR);
/* NOTREACHED */
}
$2->type = CONST;
initialize_symbol($2);
$2->info.cinfo->value = $3;
$2->info.cinfo->define = $1;
}
| T_CONST T_SYMBOL T_DOWNLOAD
{
if ($1) {
stop("Invalid downloaded constant declaration",
EX_DATAERR);
/* NOTREACHED */
}
if ($2->type != UNINITIALIZED) {
stop("Re-definition of symbol as a downloaded constant",
EX_DATAERR);
/* NOTREACHED */
}
$2->type = DOWNLOAD_CONST;
initialize_symbol($2);
$2->info.cinfo->value = download_constant_count++;
$2->info.cinfo->define = FALSE;
}
;
numerical_value:
T_NUMBER
{
$$ = $1;
}
| '-' T_NUMBER
{
$$ = -$2;
}
;
scratch_ram:
T_SRAM '{'
{
cur_symbol = symtable_get(SRAM_SYMNAME);
cur_symtype = SRAMLOC;
if (cur_symbol->type != UNINITIALIZED) {
stop("Only one SRAM definition allowed",
EX_DATAERR);
/* NOTREACHED */
}
cur_symbol->type = SRAMLOC;
initialize_symbol(cur_symbol);
}
reg_address
{
sram_or_scb_offset = cur_symbol->info.rinfo->address;
}
scb_or_sram_reg_list
'}'
{
cur_symbol = NULL;
}
;
scb:
T_SCB '{'
{
cur_symbol = symtable_get(SCB_SYMNAME);
cur_symtype = SCBLOC;
if (cur_symbol->type != UNINITIALIZED) {
stop("Only one SRAM definition allowed",
EX_SOFTWARE);
/* NOTREACHED */
}
cur_symbol->type = SCBLOC;
initialize_symbol(cur_symbol);
}
reg_address
{
sram_or_scb_offset = cur_symbol->info.rinfo->address;
}
scb_or_sram_reg_list
'}'
{
cur_symbol = NULL;
}
;
scb_or_sram_reg_list:
reg_definition
| scb_or_sram_reg_list reg_definition
;
reg_symbol:
T_SYMBOL
{
process_register(&$1);
$$.symbol = $1;
$$.offset = 0;
}
| T_SYMBOL '[' T_NUMBER ']'
{
process_register(&$1);
if (($3 + 1) > $1->info.rinfo->size) {
stop("Accessing offset beyond range of register",
EX_DATAERR);
/* NOTREACHED */
}
$$.symbol = $1;
$$.offset = $3;
}
| T_A
{
if (accumulator == NULL) {
stop("No accumulator has been defined", EX_DATAERR);
/* NOTREACHED */
}
$$.symbol = accumulator;
$$.offset = 0;
}
;
destination:
reg_symbol
{
test_writable_symbol($1.symbol);
$$ = $1;
}
;
immediate:
expression
{ $$ = $1; }
;
immediate_or_a:
expression
{
$$ = $1;
}
| T_A
{
SLIST_INIT(&$$.referenced_syms);
$$.value = 0;
}
;
source:
reg_symbol
{
test_readable_symbol($1.symbol);
$$ = $1;
}
;
opt_source:
{
$$.symbol = NULL;
$$.offset = 0;
}
| ',' source
{ $$ = $2; }
;
ret:
{ $$ = 0; }
| T_RET
{ $$ = 1; }
;
label:
T_SYMBOL ':'
{
if ($1->type != UNINITIALIZED) {
stop("Program label multiply defined", EX_DATAERR);
/* NOTREACHED */
}
$1->type = LABEL;
initialize_symbol($1);
$1->info.linfo->address = instruction_ptr;
}
;
address:
T_SYMBOL
{
$$.symbol = $1;
$$.offset = 0;
}
| T_SYMBOL '+' T_NUMBER
{
$$.symbol = $1;
$$.offset = $3;
}
| T_SYMBOL '-' T_NUMBER
{
$$.symbol = $1;
$$.offset = -$3;
}
| '.'
{
$$.symbol = NULL;
$$.offset = 0;
}
| '.' '+' T_NUMBER
{
$$.symbol = NULL;
$$.offset = $3;
}
| '.' '-' T_NUMBER
{
$$.symbol = NULL;
$$.offset = -$3;
}
;
conditional:
T_IF
{
if (cur_patch != NULL) {
stop("Nested .if directive", EX_DATAERR);
/* NOTREACHED */
}
cur_patch = patch_alloc();
cur_patch->begin = instruction_ptr;
}
option_list
;
conditional:
T_ELSE
{
patch_t *next_patch;
if (cur_patch == NULL) {
stop(".else outsize of .if", EX_DATAERR);
/* NOTREACHED */
}
cur_patch->end = instruction_ptr;
next_patch = patch_alloc();
next_patch->options = cur_patch->options;
next_patch->negative = cur_patch->negative ? FALSE : TRUE;
cur_patch = next_patch;
cur_patch->begin = instruction_ptr;
}
;
conditional:
T_ENDIF
{
if (cur_patch == NULL) {
stop(".endif outsize of .if", EX_DATAERR);
/* NOTREACHED */
}
cur_patch->end = instruction_ptr;
cur_patch = NULL;
}
;
option_list:
'(' option_symbol_list ')'
| '!' option_list
{
cur_patch->negative = cur_patch->negative ? FALSE : TRUE;
}
;
option_symbol_list:
T_SYMBOL
{
add_conditional($1);
}
| option_list '|' T_SYMBOL
{
add_conditional($3);
}
;
f1_opcode:
T_AND { $$ = AIC_OP_AND; }
| T_XOR { $$ = AIC_OP_XOR; }
| T_ADD { $$ = AIC_OP_ADD; }
| T_ADC { $$ = AIC_OP_ADC; }
;
code:
f1_opcode destination ',' immediate_or_a opt_source ret ';'
{
format_1_instr($1, &$2, &$4, &$5, $6);
}
;
code:
T_OR reg_symbol ',' immediate_or_a opt_source ret ';'
{
format_1_instr(AIC_OP_OR, &$2, &$4, &$5, $6);
}
;
code:
T_INC destination opt_source ret ';'
{
expression_t immed;
make_expression(&immed, 1);
format_1_instr(AIC_OP_ADD, &$2, &immed, &$3, $4);
}
;
code:
T_DEC destination opt_source ret ';'
{
expression_t immed;
make_expression(&immed, -1);
format_1_instr(AIC_OP_ADD, &$2, &immed, &$3, $4);
}
;
code:
T_CLC ret ';'
{
expression_t immed;
make_expression(&immed, -1);
format_1_instr(AIC_OP_ADD, &none, &immed, &allzeros, $2);
}
| T_CLC T_MVI destination ',' immediate_or_a ret ';'
{
format_1_instr(AIC_OP_ADD, &$3, &$5, &allzeros, $6);
}
;
code:
T_STC ret ';'
{
expression_t immed;
make_expression(&immed, 1);
format_1_instr(AIC_OP_ADD, &none, &immed, &allones, $2);
}
| T_STC destination ret ';'
{
expression_t immed;
make_expression(&immed, 1);
format_1_instr(AIC_OP_ADD, &$2, &immed, &allones, $3);
}
;
code:
T_MOV destination ',' source ret ';'
{
expression_t immed;
make_expression(&immed, 0xff);
format_1_instr(AIC_OP_AND, &$2, &immed, &$4, $5);
}
;
code:
T_MVI destination ',' immediate_or_a ret ';'
{
format_1_instr(AIC_OP_OR, &$2, &$4, &allzeros, $5);
}
;
code:
T_CLR destination ret ';'
{
expression_t immed;
make_expression(&immed, 0xff);
format_1_instr(AIC_OP_AND, &$2, &immed, &allzeros, $3);
}
;
code:
T_NOP ';'
{
expression_t immed;
make_expression(&immed, 0xff);
format_1_instr(AIC_OP_AND, &none, &immed, &allzeros, FALSE);
}
;
code:
T_RET ';'
{
expression_t immed;
make_expression(&immed, 0xff);
format_1_instr(AIC_OP_AND, &none, &immed, &allzeros, TRUE);
}
;
/*
* This grammer differs from the one in the aic7xxx
* reference manual since the grammer listed there is
* ambiguous and causes a shift/reduce conflict.
* It also seems more logical as the "immediate"
* argument is listed as the second arg like the
* other formats.
*/
f2_opcode:
T_SHL { $$ = AIC_OP_SHL; }
| T_SHR { $$ = AIC_OP_SHR; }
| T_ROL { $$ = AIC_OP_ROL; }
| T_ROR { $$ = AIC_OP_ROR; }
;
code:
f2_opcode destination ',' expression opt_source ret ';'
{
format_2_instr($1, &$2, &$4, &$5, $6);
}
;
jmp_jc_jnc_call:
T_JMP { $$ = AIC_OP_JMP; }
| T_JC { $$ = AIC_OP_JC; }
| T_JNC { $$ = AIC_OP_JNC; }
| T_CALL { $$ = AIC_OP_CALL; }
;
jz_jnz:
T_JZ { $$ = AIC_OP_JZ; }
| T_JNZ { $$ = AIC_OP_JNZ; }
;
je_jne:
T_JE { $$ = AIC_OP_JE; }
| T_JNE { $$ = AIC_OP_JNE; }
;
code:
jmp_jc_jnc_call address ';'
{
expression_t immed;
make_expression(&immed, 0);
format_3_instr($1, &sindex, &immed, &$2);
}
;
code:
T_OR reg_symbol ',' immediate jmp_jc_jnc_call address ';'
{
format_3_instr($5, &$2, &$4, &$6);
}
;
code:
T_TEST source ',' immediate_or_a jz_jnz address ';'
{
format_3_instr($5, &$2, &$4, &$6);
}
;
code:
T_CMP source ',' immediate_or_a je_jne address ';'
{
format_3_instr($5, &$2, &$4, &$6);
}
;
code:
T_MOV source jmp_jc_jnc_call address ';'
{
expression_t immed;
make_expression(&immed, 0);
format_3_instr($3, &$2, &immed, &$4);
}
;
code:
T_MVI immediate jmp_jc_jnc_call address ';'
{
format_3_instr($3, &allzeros, &$2, &$4);
}
;
%%
static void
process_bitmask(mask_type, sym, mask)
int mask_type;
symbol_t *sym;
int mask;
{
/*
* Add the current register to its
* symbol list, if it already exists,
* warn if we are setting it to a
* different value, or in the bit to
* the "allowed bits" of this register.
*/
if (sym->type == UNINITIALIZED) {
sym->type = mask_type;
initialize_symbol(sym);
if (mask_type == BIT) {
if (mask == 0) {
stop("Bitmask with no bits set", EX_DATAERR);
/* NOTREACHED */
}
if ((mask & ~(0x01 << (ffs(mask) - 1))) != 0) {
stop("Bitmask with more than one bit set",
EX_DATAERR);
/* NOTREACHED */
}
}
sym->info.minfo->mask = mask;
} else if (sym->type != mask_type) {
stop("Bit definition mirrors a definition of the same "
" name, but a different type", EX_DATAERR);
/* NOTREACHED */
} else if (mask != sym->info.minfo->mask) {
stop("Bitmask redefined with a conflicting value", EX_DATAERR);
/* NOTREACHED */
}
/* Fail if this symbol is already listed */
if (symlist_search(&(sym->info.minfo->symrefs),
cur_symbol->name) != NULL) {
stop("Bitmask defined multiple times for register", EX_DATAERR);
/* NOTREACHED */
}
symlist_add(&(sym->info.minfo->symrefs), cur_symbol,
SYMLIST_INSERT_HEAD);
cur_symbol->info.rinfo->valid_bitmask |= mask;
cur_symbol->info.rinfo->typecheck_masks = TRUE;
}
static void
initialize_symbol(symbol)
symbol_t *symbol;
{
switch (symbol->type) {
case UNINITIALIZED:
stop("Call to initialize_symbol with type field unset",
EX_SOFTWARE);
/* NOTREACHED */
break;
case REGISTER:
case SRAMLOC:
case SCBLOC:
symbol->info.rinfo =
(struct reg_info *)malloc(sizeof(struct reg_info));
if (symbol->info.rinfo == NULL) {
stop("Can't create register info", EX_SOFTWARE);
/* NOTREACHED */
}
memset(symbol->info.rinfo, 0,
sizeof(struct reg_info));
break;
case ALIAS:
symbol->info.ainfo =
(struct alias_info *)malloc(sizeof(struct alias_info));
if (symbol->info.ainfo == NULL) {
stop("Can't create alias info", EX_SOFTWARE);
/* NOTREACHED */
}
memset(symbol->info.ainfo, 0,
sizeof(struct alias_info));
break;
case MASK:
case BIT:
symbol->info.minfo =
(struct mask_info *)malloc(sizeof(struct mask_info));
if (symbol->info.minfo == NULL) {
stop("Can't create bitmask info", EX_SOFTWARE);
/* NOTREACHED */
}
memset(symbol->info.minfo, 0, sizeof(struct mask_info));
SLIST_INIT(&(symbol->info.minfo->symrefs));
break;
case CONST:
case DOWNLOAD_CONST:
symbol->info.cinfo =
(struct const_info *)malloc(sizeof(struct const_info));
if (symbol->info.cinfo == NULL) {
stop("Can't create alias info", EX_SOFTWARE);
/* NOTREACHED */
}
memset(symbol->info.cinfo, 0,
sizeof(struct const_info));
break;
case LABEL:
symbol->info.linfo =
(struct label_info *)malloc(sizeof(struct label_info));
if (symbol->info.linfo == NULL) {
stop("Can't create label info", EX_SOFTWARE);
/* NOTREACHED */
}
memset(symbol->info.linfo, 0,
sizeof(struct label_info));
break;
case CONDITIONAL:
symbol->info.condinfo =
(struct cond_info *)malloc(sizeof(struct cond_info));
if (symbol->info.condinfo == NULL) {
stop("Can't create conditional info", EX_SOFTWARE);
/* NOTREACHED */
}
memset(symbol->info.condinfo, 0,
sizeof(struct cond_info));
break;
default:
stop("Call to initialize_symbol with invalid symbol type",
EX_SOFTWARE);
/* NOTREACHED */
break;
}
}
static void
process_register(p_symbol)
symbol_t **p_symbol;
{
char buf[255];
symbol_t *symbol = *p_symbol;
if (symbol->type == UNINITIALIZED) {
snprintf(buf, sizeof(buf), "Undefined register %s",
symbol->name);
stop(buf, EX_DATAERR);
/* NOTREACHED */
} else if (symbol->type == ALIAS) {
*p_symbol = symbol->info.ainfo->parent;
} else if ((symbol->type != REGISTER)
&& (symbol->type != SCBLOC)
&& (symbol->type != SRAMLOC)) {
snprintf(buf, sizeof(buf),
"Specified symbol %s is not a register",
symbol->name);
stop(buf, EX_DATAERR);
}
}
static void
format_1_instr(opcode, dest, immed, src, ret)
int opcode;
symbol_ref_t *dest;
expression_t *immed;
symbol_ref_t *src;
int ret;
{
struct instruction *instr;
struct ins_format1 *f1_instr;
if (src->symbol == NULL)
src = dest;
/* Test register permissions */
test_writable_symbol(dest->symbol);
test_readable_symbol(src->symbol);
/* Ensure that immediate makes sense for this destination */
type_check(dest->symbol, immed, opcode);
/* Allocate sequencer space for the instruction and fill it out */
instr = seq_alloc();
f1_instr = &instr->format.format1;
f1_instr->opcode_ret = (opcode << 1) | (ret ? RETURN_BIT : 0);
f1_instr->destination = dest->symbol->info.rinfo->address
+ dest->offset;
f1_instr->source = src->symbol->info.rinfo->address
+ src->offset;
f1_instr->immediate = immed->value;
if (is_download_const(immed))
f1_instr->opcode_ret |= DOWNLOAD_CONST_IMMEDIATE;
symlist_free(&immed->referenced_syms);
instruction_ptr++;
}
static void
format_2_instr(opcode, dest, places, src, ret)
int opcode;
symbol_ref_t *dest;
expression_t *places;
symbol_ref_t *src;
int ret;
{
struct instruction *instr;
struct ins_format2 *f2_instr;
u_int8_t shift_control;
if (src->symbol == NULL)
src = dest;
/* Test register permissions */
test_writable_symbol(dest->symbol);
test_readable_symbol(src->symbol);
/* Allocate sequencer space for the instruction and fill it out */
instr = seq_alloc();
f2_instr = &instr->format.format2;
f2_instr->opcode_ret = (AIC_OP_ROL << 1) | (ret ? RETURN_BIT : 0);
f2_instr->destination = dest->symbol->info.rinfo->address
+ dest->offset;
f2_instr->source = src->symbol->info.rinfo->address
+ src->offset;
if (places->value > 8 || places->value <= 0) {
stop("illegal shift value", EX_DATAERR);
/* NOTREACHED */
}
switch (opcode) {
case AIC_OP_SHL:
if (places->value == 8)
shift_control = 0xf0;
else
shift_control = (places->value << 4) | places->value;
break;
case AIC_OP_SHR:
if (places->value == 8) {
shift_control = 0xf8;
} else {
shift_control = (places->value << 4)
| (8 - places->value)
| 0x08;
}
break;
case AIC_OP_ROL:
shift_control = places->value & 0x7;
break;
case AIC_OP_ROR:
shift_control = (8 - places->value) | 0x08;
break;
default:
shift_control = 0; /* Quiet Compiler */
stop("Invalid shift operation specified", EX_SOFTWARE);
/* NOTREACHED */
break;
};
f2_instr->shift_control = shift_control;
symlist_free(&places->referenced_syms);
instruction_ptr++;
}
static void
format_3_instr(opcode, src, immed, address)
int opcode;
symbol_ref_t *src;
expression_t *immed;
symbol_ref_t *address;
{
struct instruction *instr;
struct ins_format3 *f3_instr;
int addr;
/* Test register permissions */
test_readable_symbol(src->symbol);
/* Ensure that immediate makes sense for this source */
type_check(src->symbol, immed, opcode);
/* Allocate sequencer space for the instruction and fill it out */
instr = seq_alloc();
f3_instr = &instr->format.format3;
if (address->symbol == NULL) {
/* 'dot' referrence. Use the current instruction pointer */
addr = instruction_ptr + address->offset;
} else if (address->symbol->type == UNINITIALIZED) {
/* forward reference */
addr = address->offset;
instr->patch_label = address->symbol;
} else
addr = address->symbol->info.linfo->address + address->offset;
f3_instr->opcode_addr = (opcode << 1)
| ((addr >> 8) & 0x01);
f3_instr->address = addr & 0xff;
f3_instr->source = src->symbol->info.rinfo->address
+ src->offset;
f3_instr->immediate = immed->value;
if (is_download_const(immed))
f3_instr->opcode_addr |= DOWNLOAD_CONST_IMMEDIATE;
symlist_free(&immed->referenced_syms);
instruction_ptr++;
}
static void
test_readable_symbol(symbol)
symbol_t *symbol;
{
if (symbol->info.rinfo->mode == WO) {
stop("Write Only register specified as source",
EX_DATAERR);
/* NOTREACHED */
}
}
static void
test_writable_symbol(symbol)
symbol_t *symbol;
{
if (symbol->info.rinfo->mode == RO) {
stop("Read Only register specified as destination",
EX_DATAERR);
/* NOTREACHED */
}
}
static void
type_check(symbol, expression, opcode)
symbol_t *symbol;
expression_t *expression;
int opcode;
{
symbol_node_t *node;
int and_op;
char buf[255];
and_op = FALSE;
if (opcode == AIC_OP_AND || opcode == AIC_OP_JNZ || AIC_OP_JZ)
and_op = TRUE;
/*
* Make sure that we aren't attempting to write something
* that hasn't been defined. If this is an and operation,
* this is a mask, so "undefined" bits are okay.
*/
if (and_op == FALSE
&& (expression->value & ~symbol->info.rinfo->valid_bitmask) != 0) {
snprintf(buf, sizeof(buf),
"Invalid bit(s) 0x%x in immediate written to %s",
expression->value & ~symbol->info.rinfo->valid_bitmask,
symbol->name);
stop(buf, EX_DATAERR);
/* NOTREACHED */
}
/*
* Now make sure that all of the symbols referenced by the
* expression are defined for this register.
*/
if(symbol->info.rinfo->typecheck_masks != FALSE) {
for(node = expression->referenced_syms.slh_first;
node != NULL;
node = node->links.sle_next) {
if ((node->symbol->type == MASK
|| node->symbol->type == BIT)
&& symlist_search(&node->symbol->info.minfo->symrefs,
symbol->name) == NULL) {
snprintf(buf, sizeof(buf),
"Invalid bit or mask %s "
"for register %s",
node->symbol->name, symbol->name);
stop(buf, EX_DATAERR);
/* NOTREACHED */
}
}
}
}
static void
make_expression(immed, value)
expression_t *immed;
int value;
{
SLIST_INIT(&immed->referenced_syms);
immed->value = value & 0xff;
}
static void
add_conditional(symbol)
symbol_t *symbol;
{
static int numoptions = 1;
if (symbol->type == UNINITIALIZED) {
symbol->type = CONDITIONAL;
initialize_symbol(symbol);
symbol->info.condinfo->value = 0x01 << numoptions++;
symlist_add(&patch_options, symbol, SYMLIST_INSERT_HEAD);
} else if (symbol->type != CONDITIONAL) {
stop("Conditional symbol mirrors other symbol",
EX_DATAERR);
/* NOTREACHED */
}
cur_patch->options |= symbol->info.condinfo->value;
}
void
yyerror(string)
const char *string;
{
stop(string, EX_DATAERR);
}
static int
is_download_const(immed)
expression_t *immed;
{
if ((immed->referenced_syms.slh_first != NULL)
&& (immed->referenced_syms.slh_first->symbol->type == DOWNLOAD_CONST))
return (TRUE);
return (FALSE);
}
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