summaryrefslogtreecommitdiff
path: root/drivers/acpi/acpica/utpredef.c
blob: 97898ed71b4b3a9a9a9e8d510b83fdbe52546a71 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
/******************************************************************************
 *
 * Module Name: utpredef - support functions for predefined names
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2015, Intel Corp.
 * 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.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
 */

#include <acpi/acpi.h>
#include "accommon.h"
#include "acpredef.h"

#define _COMPONENT          ACPI_UTILITIES
ACPI_MODULE_NAME("utpredef")

/*
 * Names for the types that can be returned by the predefined objects.
 * Used for warning messages. Must be in the same order as the ACPI_RTYPEs
 */
static const char *ut_rtype_names[] = {
	"/Integer",
	"/String",
	"/Buffer",
	"/Package",
	"/Reference",
};

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_get_next_predefined_method
 *
 * PARAMETERS:  this_name           - Entry in the predefined method/name table
 *
 * RETURN:      Pointer to next entry in predefined table.
 *
 * DESCRIPTION: Get the next entry in the predefine method table. Handles the
 *              cases where a package info entry follows a method name that
 *              returns a package.
 *
 ******************************************************************************/

const union acpi_predefined_info *acpi_ut_get_next_predefined_method(const union
								     acpi_predefined_info
								     *this_name)
{

	/*
	 * Skip next entry in the table if this name returns a Package
	 * (next entry contains the package info)
	 */
	if ((this_name->info.expected_btypes & ACPI_RTYPE_PACKAGE) &&
	    (this_name->info.expected_btypes != ACPI_RTYPE_ALL)) {
		this_name++;
	}

	this_name++;
	return (this_name);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_match_predefined_method
 *
 * PARAMETERS:  name                - Name to find
 *
 * RETURN:      Pointer to entry in predefined table. NULL indicates not found.
 *
 * DESCRIPTION: Check an object name against the predefined object list.
 *
 ******************************************************************************/

const union acpi_predefined_info *acpi_ut_match_predefined_method(char *name)
{
	const union acpi_predefined_info *this_name;

	/* Quick check for a predefined name, first character must be underscore */

	if (name[0] != '_') {
		return (NULL);
	}

	/* Search info table for a predefined method/object name */

	this_name = acpi_gbl_predefined_methods;
	while (this_name->info.name[0]) {
		if (ACPI_COMPARE_NAME(name, this_name->info.name)) {
			return (this_name);
		}

		this_name = acpi_ut_get_next_predefined_method(this_name);
	}

	return (NULL);		/* Not found */
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_get_expected_return_types
 *
 * PARAMETERS:  buffer              - Where the formatted string is returned
 *              expected_Btypes     - Bitfield of expected data types
 *
 * RETURN:      Formatted string in Buffer.
 *
 * DESCRIPTION: Format the expected object types into a printable string.
 *
 ******************************************************************************/

void acpi_ut_get_expected_return_types(char *buffer, u32 expected_btypes)
{
	u32 this_rtype;
	u32 i;
	u32 j;

	if (!expected_btypes) {
		strcpy(buffer, "NONE");
		return;
	}

	j = 1;
	buffer[0] = 0;
	this_rtype = ACPI_RTYPE_INTEGER;

	for (i = 0; i < ACPI_NUM_RTYPES; i++) {

		/* If one of the expected types, concatenate the name of this type */

		if (expected_btypes & this_rtype) {
			strcat(buffer, &ut_rtype_names[i][j]);
			j = 0;	/* Use name separator from now on */
		}

		this_rtype <<= 1;	/* Next Rtype */
	}
}

/*******************************************************************************
 *
 * The remaining functions are used by iASL and acpi_help only
 *
 ******************************************************************************/

#if (defined ACPI_ASL_COMPILER || defined ACPI_HELP_APP)
#include <stdio.h>
#include <string.h>

/* Local prototypes */

static u32 acpi_ut_get_argument_types(char *buffer, u16 argument_types);

/* Types that can be returned externally by a predefined name */

static const char *ut_external_type_names[] =	/* Indexed by ACPI_TYPE_* */
{
	", UNSUPPORTED-TYPE",
	", Integer",
	", String",
	", Buffer",
	", Package"
};

/* Bit widths for resource descriptor predefined names */

static const char *ut_resource_type_names[] = {
	"/1",
	"/2",
	"/3",
	"/8",
	"/16",
	"/32",
	"/64",
	"/variable",
};

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_match_resource_name
 *
 * PARAMETERS:  name                - Name to find
 *
 * RETURN:      Pointer to entry in the resource table. NULL indicates not
 *              found.
 *
 * DESCRIPTION: Check an object name against the predefined resource
 *              descriptor object list.
 *
 ******************************************************************************/

const union acpi_predefined_info *acpi_ut_match_resource_name(char *name)
{
	const union acpi_predefined_info *this_name;

	/* Quick check for a predefined name, first character must be underscore */

	if (name[0] != '_') {
		return (NULL);
	}

	/* Search info table for a predefined method/object name */

	this_name = acpi_gbl_resource_names;
	while (this_name->info.name[0]) {
		if (ACPI_COMPARE_NAME(name, this_name->info.name)) {
			return (this_name);
		}

		this_name++;
	}

	return (NULL);		/* Not found */
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_display_predefined_method
 *
 * PARAMETERS:  buffer              - Scratch buffer for this function
 *              this_name           - Entry in the predefined method/name table
 *              multi_line          - TRUE if output should be on >1 line
 *
 * RETURN:      None
 *
 * DESCRIPTION: Display information about a predefined method. Number and
 *              type of the input arguments, and expected type(s) for the
 *              return value, if any.
 *
 ******************************************************************************/

void
acpi_ut_display_predefined_method(char *buffer,
				  const union acpi_predefined_info *this_name,
				  u8 multi_line)
{
	u32 arg_count;

	/*
	 * Get the argument count and the string buffer
	 * containing all argument types
	 */
	arg_count = acpi_ut_get_argument_types(buffer,
					       this_name->info.argument_list);

	if (multi_line) {
		printf("      ");
	}

	printf("%4.4s    Requires %s%u argument%s",
	       this_name->info.name,
	       (this_name->info.argument_list & ARG_COUNT_IS_MINIMUM) ?
	       "(at least) " : "", arg_count, arg_count != 1 ? "s" : "");

	/* Display the types for any arguments */

	if (arg_count > 0) {
		printf(" (%s)", buffer);
	}

	if (multi_line) {
		printf("\n    ");
	}

	/* Get the return value type(s) allowed */

	if (this_name->info.expected_btypes) {
		acpi_ut_get_expected_return_types(buffer,
						  this_name->info.
						  expected_btypes);
		printf("  Return value types: %s\n", buffer);
	} else {
		printf("  No return value\n");
	}
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_get_argument_types
 *
 * PARAMETERS:  buffer              - Where to return the formatted types
 *              argument_types      - Types field for this method
 *
 * RETURN:      count - the number of arguments required for this method
 *
 * DESCRIPTION: Format the required data types for this method (Integer,
 *              String, Buffer, or Package) and return the required argument
 *              count.
 *
 ******************************************************************************/

static u32 acpi_ut_get_argument_types(char *buffer, u16 argument_types)
{
	u16 this_argument_type;
	u16 sub_index;
	u16 arg_count;
	u32 i;

	*buffer = 0;
	sub_index = 2;

	/* First field in the types list is the count of args to follow */

	arg_count = METHOD_GET_ARG_COUNT(argument_types);
	if (arg_count > METHOD_PREDEF_ARGS_MAX) {
		printf("**** Invalid argument count (%u) "
		       "in predefined info structure\n", arg_count);
		return (arg_count);
	}

	/* Get each argument from the list, convert to ascii, store to buffer */

	for (i = 0; i < arg_count; i++) {
		this_argument_type = METHOD_GET_NEXT_TYPE(argument_types);

		if (!this_argument_type
		    || (this_argument_type > METHOD_MAX_ARG_TYPE)) {
			printf("**** Invalid argument type (%u) "
			       "in predefined info structure\n",
			       this_argument_type);
			return (arg_count);
		}

		strcat(buffer,
		       ut_external_type_names[this_argument_type] + sub_index);
		sub_index = 0;
	}

	return (arg_count);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_get_resource_bit_width
 *
 * PARAMETERS:  buffer              - Where the formatted string is returned
 *              types               - Bitfield of expected data types
 *
 * RETURN:      Count of return types. Formatted string in Buffer.
 *
 * DESCRIPTION: Format the resource bit widths into a printable string.
 *
 ******************************************************************************/

u32 acpi_ut_get_resource_bit_width(char *buffer, u16 types)
{
	u32 i;
	u16 sub_index;
	u32 found;

	*buffer = 0;
	sub_index = 1;
	found = 0;

	for (i = 0; i < NUM_RESOURCE_WIDTHS; i++) {
		if (types & 1) {
			strcat(buffer, &(ut_resource_type_names[i][sub_index]));
			sub_index = 0;
			found++;
		}

		types >>= 1;
	}

	return (found);
}
#endif