dtparser.y revision 229989 
1%{
2/******************************************************************************
3 *
4 * Module Name: dtparser.y - Bison input file for table compiler parser
5 *
6 *****************************************************************************/
7
8/*
9 * Copyright (C) 2000 - 2012, Intel Corp.
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions, and the following disclaimer,
17 *    without modification.
18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19 *    substantially similar to the "NO WARRANTY" disclaimer below
20 *    ("Disclaimer") and any redistribution must be conditioned upon
21 *    including a substantially similar Disclaimer requirement for further
22 *    binary redistribution.
23 * 3. Neither the names of the above-listed copyright holders nor the names
24 *    of any contributors may be used to endorse or promote products derived
25 *    from this software without specific prior written permission.
26 *
27 * Alternatively, this software may be distributed under the terms of the
28 * GNU General Public License ("GPL") version 2 as published by the Free
29 * Software Foundation.
30 *
31 * NO WARRANTY
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42 * POSSIBILITY OF SUCH DAMAGES.
43 */
44
45#include <contrib/dev/acpica/compiler/aslcompiler.h>
46#include <contrib/dev/acpica/compiler/dtcompiler.h>
47
48#define _COMPONENT          DT_COMPILER
49        ACPI_MODULE_NAME    ("dtparser")
50
51int                         DtParserlex (void);
52int                         DtParserparse (void);
53void                        DtParsererror (char const *msg);
54extern char                 *DtParsertext;
55extern DT_FIELD             *Gbl_CurrentField;
56
57UINT64                      DtParserResult; /* Expression return value */
58
59/* Bison/yacc configuration */
60
61#define yytname             DtParsername
62#define YYDEBUG             1               /* Enable debug output */
63#define YYERROR_VERBOSE     1               /* Verbose error messages */
64#define YYFLAG              -32768
65
66%}
67
68%union
69{
70     UINT64                 value;
71     UINT32                 op;
72}
73
74/*! [Begin] no source code translation */
75
76%type  <value>  Expression
77
78%token <op>     EXPOP_EOF
79%token <op>     EXPOP_NEW_LINE
80%token <op>     EXPOP_NUMBER
81%token <op>     EXPOP_HEX_NUMBER
82%token <op>     EXPOP_DECIMAL_NUMBER
83%token <op>     EXPOP_LABEL
84%token <op>     EXPOP_PAREN_OPEN
85%token <op>     EXPOP_PAREN_CLOSE
86
87%left <op>      EXPOP_LOGICAL_OR
88%left <op>      EXPOP_LOGICAL_AND
89%left <op>      EXPOP_OR
90%left <op>      EXPOP_XOR
91%left <op>      EXPOP_AND
92%left <op>      EXPOP_EQUAL EXPOP_NOT_EQUAL
93%left <op>      EXPOP_GREATER EXPOP_LESS EXPOP_GREATER_EQUAL EXPOP_LESS_EQUAL
94%left <op>      EXPOP_SHIFT_RIGHT EXPOP_SHIFT_LEFT
95%left <op>      EXPOP_ADD EXPOP_SUBTRACT
96%left <op>      EXPOP_MULTIPLY EXPOP_DIVIDE EXPOP_MODULO
97%right <op>     EXPOP_ONES_COMPLIMENT EXPOP_LOGICAL_NOT
98
99%%
100
101/*
102 *  Operator precedence rules (from K&R)
103 *
104 *  1)      ( )
105 *  2)      ! ~ (unary operators that are supported here)
106 *  3)      *   /   %
107 *  4)      +   -
108 *  5)      >>  <<
109 *  6)      <   >   <=  >=
110 *  7)      ==  !=
111 *  8)      &
112 *  9)      ^
113 *  10)     |
114 *  11)     &&
115 *  12)     ||
116 */
117Value
118    : Expression EXPOP_NEW_LINE                     { DtParserResult=$1; return 0; } /* End of line (newline) */
119    | Expression EXPOP_EOF                          { DtParserResult=$1; return 0; } /* End of string (0) */
120    ;
121
122Expression
123
124      /* Unary operators */
125
126    : EXPOP_LOGICAL_NOT         Expression          { $$ = DtDoOperator ($2, EXPOP_LOGICAL_NOT,     $2);}
127    | EXPOP_ONES_COMPLIMENT     Expression          { $$ = DtDoOperator ($2, EXPOP_ONES_COMPLIMENT, $2);}
128
129      /* Binary operators */
130
131    | Expression EXPOP_MULTIPLY         Expression  { $$ = DtDoOperator ($1, EXPOP_MULTIPLY,        $3);}
132    | Expression EXPOP_DIVIDE           Expression  { $$ = DtDoOperator ($1, EXPOP_DIVIDE,          $3);}
133    | Expression EXPOP_MODULO           Expression  { $$ = DtDoOperator ($1, EXPOP_MODULO,          $3);}
134    | Expression EXPOP_ADD              Expression  { $$ = DtDoOperator ($1, EXPOP_ADD,             $3);}
135    | Expression EXPOP_SUBTRACT         Expression  { $$ = DtDoOperator ($1, EXPOP_SUBTRACT,        $3);}
136    | Expression EXPOP_SHIFT_RIGHT      Expression  { $$ = DtDoOperator ($1, EXPOP_SHIFT_RIGHT,     $3);}
137    | Expression EXPOP_SHIFT_LEFT       Expression  { $$ = DtDoOperator ($1, EXPOP_SHIFT_LEFT,      $3);}
138    | Expression EXPOP_GREATER          Expression  { $$ = DtDoOperator ($1, EXPOP_GREATER,         $3);}
139    | Expression EXPOP_LESS             Expression  { $$ = DtDoOperator ($1, EXPOP_LESS,            $3);}
140    | Expression EXPOP_GREATER_EQUAL    Expression  { $$ = DtDoOperator ($1, EXPOP_GREATER_EQUAL,   $3);}
141    | Expression EXPOP_LESS_EQUAL       Expression  { $$ = DtDoOperator ($1, EXPOP_LESS_EQUAL,      $3);}
142    | Expression EXPOP_EQUAL            Expression  { $$ = DtDoOperator ($1, EXPOP_EQUAL,           $3);}
143    | Expression EXPOP_NOT_EQUAL        Expression  { $$ = DtDoOperator ($1, EXPOP_NOT_EQUAL,       $3);}
144    | Expression EXPOP_AND              Expression  { $$ = DtDoOperator ($1, EXPOP_AND,             $3);}
145    | Expression EXPOP_XOR              Expression  { $$ = DtDoOperator ($1, EXPOP_XOR,             $3);}
146    | Expression EXPOP_OR               Expression  { $$ = DtDoOperator ($1, EXPOP_OR,              $3);}
147    | Expression EXPOP_LOGICAL_AND      Expression  { $$ = DtDoOperator ($1, EXPOP_LOGICAL_AND,     $3);}
148    | Expression EXPOP_LOGICAL_OR       Expression  { $$ = DtDoOperator ($1, EXPOP_LOGICAL_OR,      $3);}
149
150      /* Parentheses: '(' Expression ')' */
151
152    | EXPOP_PAREN_OPEN          Expression
153        EXPOP_PAREN_CLOSE                           { $$ = $2;}
154
155      /* Label references (prefixed with $) */
156
157    | EXPOP_LABEL                                   { $$ = DtResolveLabel (DtParsertext);}
158
159      /* Default base for a non-prefixed integer is 16 */
160
161    | EXPOP_NUMBER                                  { UtStrtoul64 (DtParsertext, 16, &$$);}
162
163      /* Standard hex number (0x1234) */
164
165    | EXPOP_HEX_NUMBER                              { UtStrtoul64 (DtParsertext, 16, &$$);}
166
167      /* TBD: Decimal number with prefix (0d1234) - Not supported by UtStrtoul64 at this time */
168
169    | EXPOP_DECIMAL_NUMBER                          { UtStrtoul64 (DtParsertext, 10, &$$);}
170    ;
171%%
172
173/*! [End] no source code translation !*/
174
175/*
176 * Local support functions, including parser entry point
177 */
178#define PR_FIRST_PARSE_OPCODE   EXPOP_EOF
179#define PR_YYTNAME_START        3
180
181
182/******************************************************************************
183 *
184 * FUNCTION:    DtParsererror
185 *
186 * PARAMETERS:  Message             - Parser-generated error message
187 *
188 * RETURN:      None
189 *
190 * DESCRIPTION: Handler for parser errors
191 *
192 *****************************************************************************/
193
194void
195DtParsererror (
196    char const              *Message)
197{
198    DtError (ASL_ERROR, ASL_MSG_SYNTAX,
199        Gbl_CurrentField, (char *) Message);
200}
201
202
203/******************************************************************************
204 *
205 * FUNCTION:    DtGetOpName
206 *
207 * PARAMETERS:  ParseOpcode         - Parser token (EXPOP_*)
208 *
209 * RETURN:      Pointer to the opcode name
210 *
211 * DESCRIPTION: Get the ascii name of the parse opcode for debug output
212 *
213 *****************************************************************************/
214
215char *
216DtGetOpName (
217    UINT32                  ParseOpcode)
218{
219#ifdef ASL_YYTNAME_START
220    /*
221     * First entries (PR_YYTNAME_START) in yytname are special reserved names.
222     * Ignore first 6 characters of name (EXPOP_)
223     */
224    return ((char *) yytname
225        [(ParseOpcode - PR_FIRST_PARSE_OPCODE) + PR_YYTNAME_START] + 6);
226#else
227    return ("[Unknown parser generator]");
228#endif
229}
230
231
232/******************************************************************************
233 *
234 * FUNCTION:    DtEvaluateExpression
235 *
236 * PARAMETERS:  ExprString          - Expression to be evaluated. Must be
237 *                                    terminated by either a newline or a NUL
238 *                                    string terminator
239 *
240 * RETURN:      64-bit value for the expression
241 *
242 * DESCRIPTION: Main entry point for the DT expression parser
243 *
244 *****************************************************************************/
245
246UINT64
247DtEvaluateExpression (
248    char                    *ExprString)
249{
250
251    DbgPrint (ASL_DEBUG_OUTPUT,
252        "**** Input expression: %s  (Base 16)\n", ExprString);
253
254    /* Point lexer to the input string */
255
256    if (DtInitLexer (ExprString))
257    {
258        DtError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL,
259            Gbl_CurrentField, "Could not initialize lexer");
260        return (0);
261    }
262
263    /* Parse/Evaluate the input string (value returned in DtParserResult) */
264
265    DtParserparse ();
266    DtTerminateLexer ();
267
268    DbgPrint (ASL_DEBUG_OUTPUT,
269        "**** Parser returned value: %u (%8.8X%8.8X)\n",
270        (UINT32) DtParserResult, ACPI_FORMAT_UINT64 (DtParserResult));
271
272    return (DtParserResult);
273}
274