dtparser.y revision 241973 
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/* Define YYMALLOC/YYFREE to prevent redefinition errors  */
67
68#define YYMALLOC            malloc
69#define YYFREE              free
70%}
71
72%union
73{
74     UINT64                 value;
75     UINT32                 op;
76}
77
78/*! [Begin] no source code translation */
79
80%type  <value>  Expression
81
82%token <op>     EXPOP_EOF
83%token <op>     EXPOP_NEW_LINE
84%token <op>     EXPOP_NUMBER
85%token <op>     EXPOP_HEX_NUMBER
86%token <op>     EXPOP_DECIMAL_NUMBER
87%token <op>     EXPOP_LABEL
88%token <op>     EXPOP_PAREN_OPEN
89%token <op>     EXPOP_PAREN_CLOSE
90
91%left <op>      EXPOP_LOGICAL_OR
92%left <op>      EXPOP_LOGICAL_AND
93%left <op>      EXPOP_OR
94%left <op>      EXPOP_XOR
95%left <op>      EXPOP_AND
96%left <op>      EXPOP_EQUAL EXPOP_NOT_EQUAL
97%left <op>      EXPOP_GREATER EXPOP_LESS EXPOP_GREATER_EQUAL EXPOP_LESS_EQUAL
98%left <op>      EXPOP_SHIFT_RIGHT EXPOP_SHIFT_LEFT
99%left <op>      EXPOP_ADD EXPOP_SUBTRACT
100%left <op>      EXPOP_MULTIPLY EXPOP_DIVIDE EXPOP_MODULO
101%right <op>     EXPOP_ONES_COMPLIMENT EXPOP_LOGICAL_NOT
102
103%%
104
105/*
106 *  Operator precedence rules (from K&R)
107 *
108 *  1)      ( )
109 *  2)      ! ~ (unary operators that are supported here)
110 *  3)      *   /   %
111 *  4)      +   -
112 *  5)      >>  <<
113 *  6)      <   >   <=  >=
114 *  7)      ==  !=
115 *  8)      &
116 *  9)      ^
117 *  10)     |
118 *  11)     &&
119 *  12)     ||
120 */
121Value
122    : Expression EXPOP_NEW_LINE                     { DtParserResult=$1; return 0; } /* End of line (newline) */
123    | Expression EXPOP_EOF                          { DtParserResult=$1; return 0; } /* End of string (0) */
124    ;
125
126Expression
127
128      /* Unary operators */
129
130    : EXPOP_LOGICAL_NOT         Expression          { $$ = DtDoOperator ($2, EXPOP_LOGICAL_NOT,     $2);}
131    | EXPOP_ONES_COMPLIMENT     Expression          { $$ = DtDoOperator ($2, EXPOP_ONES_COMPLIMENT, $2);}
132
133      /* Binary operators */
134
135    | Expression EXPOP_MULTIPLY         Expression  { $$ = DtDoOperator ($1, EXPOP_MULTIPLY,        $3);}
136    | Expression EXPOP_DIVIDE           Expression  { $$ = DtDoOperator ($1, EXPOP_DIVIDE,          $3);}
137    | Expression EXPOP_MODULO           Expression  { $$ = DtDoOperator ($1, EXPOP_MODULO,          $3);}
138    | Expression EXPOP_ADD              Expression  { $$ = DtDoOperator ($1, EXPOP_ADD,             $3);}
139    | Expression EXPOP_SUBTRACT         Expression  { $$ = DtDoOperator ($1, EXPOP_SUBTRACT,        $3);}
140    | Expression EXPOP_SHIFT_RIGHT      Expression  { $$ = DtDoOperator ($1, EXPOP_SHIFT_RIGHT,     $3);}
141    | Expression EXPOP_SHIFT_LEFT       Expression  { $$ = DtDoOperator ($1, EXPOP_SHIFT_LEFT,      $3);}
142    | Expression EXPOP_GREATER          Expression  { $$ = DtDoOperator ($1, EXPOP_GREATER,         $3);}
143    | Expression EXPOP_LESS             Expression  { $$ = DtDoOperator ($1, EXPOP_LESS,            $3);}
144    | Expression EXPOP_GREATER_EQUAL    Expression  { $$ = DtDoOperator ($1, EXPOP_GREATER_EQUAL,   $3);}
145    | Expression EXPOP_LESS_EQUAL       Expression  { $$ = DtDoOperator ($1, EXPOP_LESS_EQUAL,      $3);}
146    | Expression EXPOP_EQUAL            Expression  { $$ = DtDoOperator ($1, EXPOP_EQUAL,           $3);}
147    | Expression EXPOP_NOT_EQUAL        Expression  { $$ = DtDoOperator ($1, EXPOP_NOT_EQUAL,       $3);}
148    | Expression EXPOP_AND              Expression  { $$ = DtDoOperator ($1, EXPOP_AND,             $3);}
149    | Expression EXPOP_XOR              Expression  { $$ = DtDoOperator ($1, EXPOP_XOR,             $3);}
150    | Expression EXPOP_OR               Expression  { $$ = DtDoOperator ($1, EXPOP_OR,              $3);}
151    | Expression EXPOP_LOGICAL_AND      Expression  { $$ = DtDoOperator ($1, EXPOP_LOGICAL_AND,     $3);}
152    | Expression EXPOP_LOGICAL_OR       Expression  { $$ = DtDoOperator ($1, EXPOP_LOGICAL_OR,      $3);}
153
154      /* Parentheses: '(' Expression ')' */
155
156    | EXPOP_PAREN_OPEN          Expression
157        EXPOP_PAREN_CLOSE                           { $$ = $2;}
158
159      /* Label references (prefixed with $) */
160
161    | EXPOP_LABEL                                   { $$ = DtResolveLabel (DtParsertext);}
162
163      /* Default base for a non-prefixed integer is 16 */
164
165    | EXPOP_NUMBER                                  { UtStrtoul64 (DtParsertext, 16, &$$);}
166
167      /* Standard hex number (0x1234) */
168
169    | EXPOP_HEX_NUMBER                              { UtStrtoul64 (DtParsertext, 16, &$$);}
170
171      /* TBD: Decimal number with prefix (0d1234) - Not supported by UtStrtoul64 at this time */
172
173    | EXPOP_DECIMAL_NUMBER                          { UtStrtoul64 (DtParsertext, 10, &$$);}
174    ;
175%%
176
177/*! [End] no source code translation !*/
178
179/*
180 * Local support functions, including parser entry point
181 */
182#define PR_FIRST_PARSE_OPCODE   EXPOP_EOF
183#define PR_YYTNAME_START        3
184
185
186/******************************************************************************
187 *
188 * FUNCTION:    DtParsererror
189 *
190 * PARAMETERS:  Message             - Parser-generated error message
191 *
192 * RETURN:      None
193 *
194 * DESCRIPTION: Handler for parser errors
195 *
196 *****************************************************************************/
197
198void
199DtParsererror (
200    char const              *Message)
201{
202    DtError (ASL_ERROR, ASL_MSG_SYNTAX,
203        Gbl_CurrentField, (char *) Message);
204}
205
206
207/******************************************************************************
208 *
209 * FUNCTION:    DtGetOpName
210 *
211 * PARAMETERS:  ParseOpcode         - Parser token (EXPOP_*)
212 *
213 * RETURN:      Pointer to the opcode name
214 *
215 * DESCRIPTION: Get the ascii name of the parse opcode for debug output
216 *
217 *****************************************************************************/
218
219char *
220DtGetOpName (
221    UINT32                  ParseOpcode)
222{
223#ifdef ASL_YYTNAME_START
224    /*
225     * First entries (PR_YYTNAME_START) in yytname are special reserved names.
226     * Ignore first 6 characters of name (EXPOP_)
227     */
228    return ((char *) yytname
229        [(ParseOpcode - PR_FIRST_PARSE_OPCODE) + PR_YYTNAME_START] + 6);
230#else
231    return ("[Unknown parser generator]");
232#endif
233}
234
235
236/******************************************************************************
237 *
238 * FUNCTION:    DtEvaluateExpression
239 *
240 * PARAMETERS:  ExprString          - Expression to be evaluated. Must be
241 *                                    terminated by either a newline or a NUL
242 *                                    string terminator
243 *
244 * RETURN:      64-bit value for the expression
245 *
246 * DESCRIPTION: Main entry point for the DT expression parser
247 *
248 *****************************************************************************/
249
250UINT64
251DtEvaluateExpression (
252    char                    *ExprString)
253{
254
255    DbgPrint (ASL_DEBUG_OUTPUT,
256        "**** Input expression: %s  (Base 16)\n", ExprString);
257
258    /* Point lexer to the input string */
259
260    if (DtInitLexer (ExprString))
261    {
262        DtError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL,
263            Gbl_CurrentField, "Could not initialize lexer");
264        return (0);
265    }
266
267    /* Parse/Evaluate the input string (value returned in DtParserResult) */
268
269    DtParserparse ();
270    DtTerminateLexer ();
271
272    DbgPrint (ASL_DEBUG_OUTPUT,
273        "**** Parser returned value: %u (%8.8X%8.8X)\n",
274        (UINT32) DtParserResult, ACPI_FORMAT_UINT64 (DtParserResult));
275
276    return (DtParserResult);
277}
278