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
|
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
*
* Module Name: psutils - Parser miscellaneous utilities (Parser only)
*
* Copyright (C) 2000 - 2021, Intel Corp.
*
*****************************************************************************/
#include <acpi/acpi.h>
#include "accommon.h"
#include "acparser.h"
#include "amlcode.h"
#include "acconvert.h"
#define _COMPONENT ACPI_PARSER
ACPI_MODULE_NAME("psutils")
/*******************************************************************************
*
* FUNCTION: acpi_ps_create_scope_op
*
* PARAMETERS: None
*
* RETURN: A new Scope object, null on failure
*
* DESCRIPTION: Create a Scope and associated namepath op with the root name
*
******************************************************************************/
union acpi_parse_object *acpi_ps_create_scope_op(u8 *aml)
{
union acpi_parse_object *scope_op;
scope_op = acpi_ps_alloc_op(AML_SCOPE_OP, aml);
if (!scope_op) {
return (NULL);
}
scope_op->named.name = ACPI_ROOT_NAME;
return (scope_op);
}
/*******************************************************************************
*
* FUNCTION: acpi_ps_init_op
*
* PARAMETERS: op - A newly allocated Op object
* opcode - Opcode to store in the Op
*
* RETURN: None
*
* DESCRIPTION: Initialize a parse (Op) object
*
******************************************************************************/
void acpi_ps_init_op(union acpi_parse_object *op, u16 opcode)
{
ACPI_FUNCTION_ENTRY();
op->common.descriptor_type = ACPI_DESC_TYPE_PARSER;
op->common.aml_opcode = opcode;
ACPI_DISASM_ONLY_MEMBERS(acpi_ut_safe_strncpy(op->common.aml_op_name,
(acpi_ps_get_opcode_info
(opcode))->name,
sizeof(op->common.
aml_op_name)));
}
/*******************************************************************************
*
* FUNCTION: acpi_ps_alloc_op
*
* PARAMETERS: opcode - Opcode that will be stored in the new Op
* aml - Address of the opcode
*
* RETURN: Pointer to the new Op, null on failure
*
* DESCRIPTION: Allocate an acpi_op, choose op type (and thus size) based on
* opcode. A cache of opcodes is available for the pure
* GENERIC_OP, since this is by far the most commonly used.
*
******************************************************************************/
union acpi_parse_object *acpi_ps_alloc_op(u16 opcode, u8 *aml)
{
union acpi_parse_object *op;
const struct acpi_opcode_info *op_info;
u8 flags = ACPI_PARSEOP_GENERIC;
ACPI_FUNCTION_ENTRY();
op_info = acpi_ps_get_opcode_info(opcode);
/* Determine type of parse_op required */
if (op_info->flags & AML_DEFER) {
flags = ACPI_PARSEOP_DEFERRED;
} else if (op_info->flags & AML_NAMED) {
flags = ACPI_PARSEOP_NAMED_OBJECT;
} else if (opcode == AML_INT_BYTELIST_OP) {
flags = ACPI_PARSEOP_BYTELIST;
}
/* Allocate the minimum required size object */
if (flags == ACPI_PARSEOP_GENERIC) {
/* The generic op (default) is by far the most common (16 to 1) */
op = acpi_os_acquire_object(acpi_gbl_ps_node_cache);
} else {
/* Extended parseop */
op = acpi_os_acquire_object(acpi_gbl_ps_node_ext_cache);
}
/* Initialize the Op */
if (op) {
acpi_ps_init_op(op, opcode);
op->common.aml = aml;
op->common.flags = flags;
ASL_CV_CLEAR_OP_COMMENTS(op);
if (opcode == AML_SCOPE_OP) {
acpi_gbl_current_scope = op;
}
if (acpi_gbl_capture_comments) {
ASL_CV_TRANSFER_COMMENTS(op);
}
}
return (op);
}
/*******************************************************************************
*
* FUNCTION: acpi_ps_free_op
*
* PARAMETERS: op - Op to be freed
*
* RETURN: None.
*
* DESCRIPTION: Free an Op object. Either put it on the GENERIC_OP cache list
* or actually free it.
*
******************************************************************************/
void acpi_ps_free_op(union acpi_parse_object *op)
{
ACPI_FUNCTION_NAME(ps_free_op);
ASL_CV_CLEAR_OP_COMMENTS(op);
if (op->common.aml_opcode == AML_INT_RETURN_VALUE_OP) {
ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
"Free retval op: %p\n", op));
}
if (op->common.flags & ACPI_PARSEOP_GENERIC) {
(void)acpi_os_release_object(acpi_gbl_ps_node_cache, op);
} else {
(void)acpi_os_release_object(acpi_gbl_ps_node_ext_cache, op);
}
}
/*******************************************************************************
*
* FUNCTION: Utility functions
*
* DESCRIPTION: Low level character and object functions
*
******************************************************************************/
/*
* Is "c" a namestring lead character?
*/
u8 acpi_ps_is_leading_char(u32 c)
{
return ((u8) (c == '_' || (c >= 'A' && c <= 'Z')));
}
/*
* Get op's name (4-byte name segment) or 0 if unnamed
*/
u32 acpi_ps_get_name(union acpi_parse_object * op)
{
/* The "generic" object has no name associated with it */
if (op->common.flags & ACPI_PARSEOP_GENERIC) {
return (0);
}
/* Only the "Extended" parse objects have a name */
return (op->named.name);
}
/*
* Set op's name
*/
void acpi_ps_set_name(union acpi_parse_object *op, u32 name)
{
/* The "generic" object has no name associated with it */
if (op->common.flags & ACPI_PARSEOP_GENERIC) {
return;
}
op->named.name = name;
}
|
