2 /******************************************************************************
4 * Module Name: dtparser.y - Bison input file for table compiler parser
6 *****************************************************************************/
9 * Copyright (C) 2000 - 2015, Intel Corp.
10 * All rights reserved.
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13 * modification, are permitted provided that the following conditions
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21 * including a substantially similar Disclaimer requirement for further
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24 * of any contributors may be used to endorse or promote products derived
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45 #include <contrib/dev/acpica/compiler/aslcompiler.h>
46 #include <contrib/dev/acpica/compiler/dtcompiler.h>
48 #define _COMPONENT DT_COMPILER
49 ACPI_MODULE_NAME ("dtparser")
51 void * AslLocalAllocate (unsigned int Size);
53 /* Bison/yacc configuration */
56 #define alloca AslLocalAllocate
58 int DtParserlex (void);
59 int DtParserparse (void);
60 void DtParsererror (char const *msg);
61 extern char *DtParsertext;
62 extern DT_FIELD *Gbl_CurrentField;
64 UINT64 DtParserResult; /* Expression return value */
66 /* Bison/yacc configuration */
68 #define yytname DtParsername
69 #define YYDEBUG 1 /* Enable debug output */
70 #define YYERROR_VERBOSE 1 /* Verbose error messages */
73 /* Define YYMALLOC/YYFREE to prevent redefinition errors */
75 #define YYMALLOC malloc
85 /*! [Begin] no source code translation */
87 %type <value> Expression
90 %token <op> EXPOP_NEW_LINE
91 %token <op> EXPOP_NUMBER
92 %token <op> EXPOP_HEX_NUMBER
93 %token <op> EXPOP_DECIMAL_NUMBER
94 %token <op> EXPOP_LABEL
95 %token <op> EXPOP_PAREN_OPEN
96 %token <op> EXPOP_PAREN_CLOSE
98 %left <op> EXPOP_LOGICAL_OR
99 %left <op> EXPOP_LOGICAL_AND
103 %left <op> EXPOP_EQUAL EXPOP_NOT_EQUAL
104 %left <op> EXPOP_GREATER EXPOP_LESS EXPOP_GREATER_EQUAL EXPOP_LESS_EQUAL
105 %left <op> EXPOP_SHIFT_RIGHT EXPOP_SHIFT_LEFT
106 %left <op> EXPOP_ADD EXPOP_SUBTRACT
107 %left <op> EXPOP_MULTIPLY EXPOP_DIVIDE EXPOP_MODULO
108 %right <op> EXPOP_ONES_COMPLIMENT EXPOP_LOGICAL_NOT
113 * Operator precedence rules (from K&R)
116 * 2) ! ~ (unary operators that are supported here)
129 : Expression EXPOP_NEW_LINE { DtParserResult=$1; return 0; } /* End of line (newline) */
130 | Expression EXPOP_EOF { DtParserResult=$1; return 0; } /* End of string (0) */
135 /* Unary operators */
137 : EXPOP_LOGICAL_NOT Expression { $$ = DtDoOperator ($2, EXPOP_LOGICAL_NOT, $2);}
138 | EXPOP_ONES_COMPLIMENT Expression { $$ = DtDoOperator ($2, EXPOP_ONES_COMPLIMENT, $2);}
140 /* Binary operators */
142 | Expression EXPOP_MULTIPLY Expression { $$ = DtDoOperator ($1, EXPOP_MULTIPLY, $3);}
143 | Expression EXPOP_DIVIDE Expression { $$ = DtDoOperator ($1, EXPOP_DIVIDE, $3);}
144 | Expression EXPOP_MODULO Expression { $$ = DtDoOperator ($1, EXPOP_MODULO, $3);}
145 | Expression EXPOP_ADD Expression { $$ = DtDoOperator ($1, EXPOP_ADD, $3);}
146 | Expression EXPOP_SUBTRACT Expression { $$ = DtDoOperator ($1, EXPOP_SUBTRACT, $3);}
147 | Expression EXPOP_SHIFT_RIGHT Expression { $$ = DtDoOperator ($1, EXPOP_SHIFT_RIGHT, $3);}
148 | Expression EXPOP_SHIFT_LEFT Expression { $$ = DtDoOperator ($1, EXPOP_SHIFT_LEFT, $3);}
149 | Expression EXPOP_GREATER Expression { $$ = DtDoOperator ($1, EXPOP_GREATER, $3);}
150 | Expression EXPOP_LESS Expression { $$ = DtDoOperator ($1, EXPOP_LESS, $3);}
151 | Expression EXPOP_GREATER_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_GREATER_EQUAL, $3);}
152 | Expression EXPOP_LESS_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_LESS_EQUAL, $3);}
153 | Expression EXPOP_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_EQUAL, $3);}
154 | Expression EXPOP_NOT_EQUAL Expression { $$ = DtDoOperator ($1, EXPOP_NOT_EQUAL, $3);}
155 | Expression EXPOP_AND Expression { $$ = DtDoOperator ($1, EXPOP_AND, $3);}
156 | Expression EXPOP_XOR Expression { $$ = DtDoOperator ($1, EXPOP_XOR, $3);}
157 | Expression EXPOP_OR Expression { $$ = DtDoOperator ($1, EXPOP_OR, $3);}
158 | Expression EXPOP_LOGICAL_AND Expression { $$ = DtDoOperator ($1, EXPOP_LOGICAL_AND, $3);}
159 | Expression EXPOP_LOGICAL_OR Expression { $$ = DtDoOperator ($1, EXPOP_LOGICAL_OR, $3);}
161 /* Parentheses: '(' Expression ')' */
163 | EXPOP_PAREN_OPEN Expression
164 EXPOP_PAREN_CLOSE { $$ = $2;}
166 /* Label references (prefixed with $) */
168 | EXPOP_LABEL { $$ = DtResolveLabel (DtParsertext);}
170 /* Default base for a non-prefixed integer is 16 */
172 | EXPOP_NUMBER { stroul64 (DtParsertext, 16, &$$);}
174 /* Standard hex number (0x1234) */
176 | EXPOP_HEX_NUMBER { stroul64 (DtParsertext, 16, &$$);}
178 /* TBD: Decimal number with prefix (0d1234) - Not supported by stroul64 at this time */
180 | EXPOP_DECIMAL_NUMBER { stroul64 (DtParsertext, 10, &$$);}
184 /*! [End] no source code translation !*/
187 * Local support functions, including parser entry point
189 #define PR_FIRST_PARSE_OPCODE EXPOP_EOF
190 #define PR_YYTNAME_START 3
193 /******************************************************************************
195 * FUNCTION: DtParsererror
197 * PARAMETERS: Message - Parser-generated error message
201 * DESCRIPTION: Handler for parser errors
203 *****************************************************************************/
209 DtError (ASL_ERROR, ASL_MSG_SYNTAX,
210 Gbl_CurrentField, (char *) Message);
214 /******************************************************************************
216 * FUNCTION: DtGetOpName
218 * PARAMETERS: ParseOpcode - Parser token (EXPOP_*)
220 * RETURN: Pointer to the opcode name
222 * DESCRIPTION: Get the ascii name of the parse opcode for debug output
224 *****************************************************************************/
230 #ifdef ASL_YYTNAME_START
232 * First entries (PR_YYTNAME_START) in yytname are special reserved names.
233 * Ignore first 6 characters of name (EXPOP_)
235 return ((char *) yytname
236 [(ParseOpcode - PR_FIRST_PARSE_OPCODE) + PR_YYTNAME_START] + 6);
238 return ("[Unknown parser generator]");
243 /******************************************************************************
245 * FUNCTION: DtEvaluateExpression
247 * PARAMETERS: ExprString - Expression to be evaluated. Must be
248 * terminated by either a newline or a NUL
251 * RETURN: 64-bit value for the expression
253 * DESCRIPTION: Main entry point for the DT expression parser
255 *****************************************************************************/
258 DtEvaluateExpression (
262 DbgPrint (ASL_DEBUG_OUTPUT,
263 "**** Input expression: %s (Base 16)\n", ExprString);
265 /* Point lexer to the input string */
267 if (DtInitLexer (ExprString))
269 DtError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL,
270 Gbl_CurrentField, "Could not initialize lexer");
274 /* Parse/Evaluate the input string (value returned in DtParserResult) */
279 DbgPrint (ASL_DEBUG_OUTPUT,
280 "**** Parser returned value: %u (%8.8X%8.8X)\n",
281 (UINT32) DtParserResult, ACPI_FORMAT_UINT64 (DtParserResult));
283 return (DtParserResult);