1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2 /******************************************************************************
3  *
4  * Module Name: psopinfo - AML opcode information functions and dispatch tables
5  *
6  * Copyright (C) 2000 - 2022, Intel Corp.
7  *
8  *****************************************************************************/
9 
10 #include <acpi/acpi.h>
11 #include "accommon.h"
12 #include "acparser.h"
13 #include "acopcode.h"
14 #include "amlcode.h"
15 
16 #define _COMPONENT          ACPI_PARSER
17 ACPI_MODULE_NAME("psopinfo")
18 
19 static const u8 acpi_gbl_argument_count[] =
20     { 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 6 };
21 
22 /*******************************************************************************
23  *
24  * FUNCTION:    acpi_ps_get_opcode_info
25  *
26  * PARAMETERS:  opcode              - The AML opcode
27  *
28  * RETURN:      A pointer to the info about the opcode.
29  *
30  * DESCRIPTION: Find AML opcode description based on the opcode.
31  *              NOTE: This procedure must ALWAYS return a valid pointer!
32  *
33  ******************************************************************************/
34 
acpi_ps_get_opcode_info(u16 opcode)35 const struct acpi_opcode_info *acpi_ps_get_opcode_info(u16 opcode)
36 {
37 #ifdef ACPI_DEBUG_OUTPUT
38 	const char *opcode_name = "Unknown AML opcode";
39 #endif
40 
41 	ACPI_FUNCTION_NAME(ps_get_opcode_info);
42 
43 	/*
44 	 * Detect normal 8-bit opcode or extended 16-bit opcode
45 	 */
46 	if (!(opcode & 0xFF00)) {
47 
48 		/* Simple (8-bit) opcode: 0-255, can't index beyond table  */
49 
50 		return (&acpi_gbl_aml_op_info
51 			[acpi_gbl_short_op_index[(u8)opcode]]);
52 	}
53 
54 	if (((opcode & 0xFF00) == AML_EXTENDED_OPCODE) &&
55 	    (((u8)opcode) <= MAX_EXTENDED_OPCODE)) {
56 
57 		/* Valid extended (16-bit) opcode */
58 
59 		return (&acpi_gbl_aml_op_info
60 			[acpi_gbl_long_op_index[(u8)opcode]]);
61 	}
62 #if defined ACPI_ASL_COMPILER && defined ACPI_DEBUG_OUTPUT
63 #include "asldefine.h"
64 
65 	switch (opcode) {
66 	case AML_RAW_DATA_BYTE:
67 		opcode_name = "-Raw Data Byte-";
68 		break;
69 
70 	case AML_RAW_DATA_WORD:
71 		opcode_name = "-Raw Data Word-";
72 		break;
73 
74 	case AML_RAW_DATA_DWORD:
75 		opcode_name = "-Raw Data Dword-";
76 		break;
77 
78 	case AML_RAW_DATA_QWORD:
79 		opcode_name = "-Raw Data Qword-";
80 		break;
81 
82 	case AML_RAW_DATA_BUFFER:
83 		opcode_name = "-Raw Data Buffer-";
84 		break;
85 
86 	case AML_RAW_DATA_CHAIN:
87 		opcode_name = "-Raw Data Buffer Chain-";
88 		break;
89 
90 	case AML_PACKAGE_LENGTH:
91 		opcode_name = "-Package Length-";
92 		break;
93 
94 	case AML_UNASSIGNED_OPCODE:
95 		opcode_name = "-Unassigned Opcode-";
96 		break;
97 
98 	case AML_DEFAULT_ARG_OP:
99 		opcode_name = "-Default Arg-";
100 		break;
101 
102 	default:
103 		break;
104 	}
105 #endif
106 
107 	/* Unknown AML opcode */
108 
109 	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "%s [%4.4X]\n", opcode_name, opcode));
110 
111 	return (&acpi_gbl_aml_op_info[_UNK]);
112 }
113 
114 /*******************************************************************************
115  *
116  * FUNCTION:    acpi_ps_get_opcode_name
117  *
118  * PARAMETERS:  opcode              - The AML opcode
119  *
120  * RETURN:      A pointer to the name of the opcode (ASCII String)
121  *              Note: Never returns NULL.
122  *
123  * DESCRIPTION: Translate an opcode into a human-readable string
124  *
125  ******************************************************************************/
126 
acpi_ps_get_opcode_name(u16 opcode)127 const char *acpi_ps_get_opcode_name(u16 opcode)
128 {
129 #if defined(ACPI_DISASSEMBLER) || defined (ACPI_DEBUG_OUTPUT)
130 
131 	const struct acpi_opcode_info *op;
132 
133 	op = acpi_ps_get_opcode_info(opcode);
134 
135 	/* Always guaranteed to return a valid pointer */
136 
137 	return (op->name);
138 
139 #else
140 	return ("OpcodeName unavailable");
141 
142 #endif
143 }
144 
145 /*******************************************************************************
146  *
147  * FUNCTION:    acpi_ps_get_argument_count
148  *
149  * PARAMETERS:  op_type             - Type associated with the AML opcode
150  *
151  * RETURN:      Argument count
152  *
153  * DESCRIPTION: Obtain the number of expected arguments for an AML opcode
154  *
155  ******************************************************************************/
156 
acpi_ps_get_argument_count(u32 op_type)157 u8 acpi_ps_get_argument_count(u32 op_type)
158 {
159 
160 	if (op_type <= AML_TYPE_EXEC_6A_0T_1R) {
161 		return (acpi_gbl_argument_count[op_type]);
162 	}
163 
164 	return (0);
165 }
166 
167 /*
168  * This table is directly indexed by the opcodes It returns
169  * an index into the opcode table (acpi_gbl_aml_op_info)
170  */
171 const u8 acpi_gbl_short_op_index[256] = {
172 /*              0     1     2     3     4     5     6     7  */
173 /*              8     9     A     B     C     D     E     F  */
174 /* 0x00 */ 0x00, 0x01, _UNK, _UNK, _UNK, _UNK, 0x02, _UNK,
175 /* 0x08 */ 0x03, _UNK, 0x04, 0x05, 0x06, 0x07, 0x6E, _UNK,
176 /* 0x10 */ 0x08, 0x09, 0x0a, 0x6F, 0x0b, 0x81, _UNK, _UNK,
177 /* 0x18 */ _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK,
178 /* 0x20 */ _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK,
179 /* 0x28 */ _UNK, _UNK, _UNK, _UNK, _UNK, 0x63, _PFX, _PFX,
180 /* 0x30 */ 0x67, 0x66, 0x68, 0x65, 0x69, 0x64, 0x6A, 0x7D,
181 /* 0x38 */ 0x7F, 0x80, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK,
182 /* 0x40 */ _UNK, _ASC, _ASC, _ASC, _ASC, _ASC, _ASC, _ASC,
183 /* 0x48 */ _ASC, _ASC, _ASC, _ASC, _ASC, _ASC, _ASC, _ASC,
184 /* 0x50 */ _ASC, _ASC, _ASC, _ASC, _ASC, _ASC, _ASC, _ASC,
185 /* 0x58 */ _ASC, _ASC, _ASC, _UNK, _PFX, _UNK, _PFX, _ASC,
186 /* 0x60 */ 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13,
187 /* 0x68 */ 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, _UNK,
188 /* 0x70 */ 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22,
189 /* 0x78 */ 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a,
190 /* 0x80 */ 0x2b, 0x2c, 0x2d, 0x2e, 0x70, 0x71, 0x2f, 0x30,
191 /* 0x88 */ 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x72,
192 /* 0x90 */ 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x73, 0x74,
193 /* 0x98 */ 0x75, 0x76, _UNK, _UNK, 0x77, 0x78, 0x79, 0x7A,
194 /* 0xA0 */ 0x3e, 0x3f, 0x40, 0x41, 0x42, 0x43, 0x60, 0x61,
195 /* 0xA8 */ 0x62, 0x82, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK,
196 /* 0xB0 */ _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK,
197 /* 0xB8 */ _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK,
198 /* 0xC0 */ _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK,
199 /* 0xC8 */ _UNK, _UNK, _UNK, _UNK, 0x44, _UNK, _UNK, _UNK,
200 /* 0xD0 */ _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK,
201 /* 0xD8 */ _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK,
202 /* 0xE0 */ _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK,
203 /* 0xE8 */ _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK,
204 /* 0xF0 */ _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK,
205 /* 0xF8 */ _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, 0x45,
206 };
207 
208 /*
209  * This table is indexed by the second opcode of the extended opcode
210  * pair. It returns an index into the opcode table (acpi_gbl_aml_op_info)
211  */
212 const u8 acpi_gbl_long_op_index[NUM_EXTENDED_OPCODE] = {
213 /*              0     1     2     3     4     5     6     7  */
214 /*              8     9     A     B     C     D     E     F  */
215 /* 0x00 */ _UNK, 0x46, 0x47, _UNK, _UNK, _UNK, _UNK, _UNK,
216 /* 0x08 */ _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK,
217 /* 0x10 */ _UNK, _UNK, 0x48, 0x49, _UNK, _UNK, _UNK, _UNK,
218 /* 0x18 */ _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, 0x7B,
219 /* 0x20 */ 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51,
220 /* 0x28 */ 0x52, 0x53, 0x54, _UNK, _UNK, _UNK, _UNK, _UNK,
221 /* 0x30 */ 0x55, 0x56, 0x57, 0x7e, _UNK, _UNK, _UNK, _UNK,
222 /* 0x38 */ _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK,
223 /* 0x40 */ _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK,
224 /* 0x48 */ _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK,
225 /* 0x50 */ _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK,
226 /* 0x58 */ _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK,
227 /* 0x60 */ _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK,
228 /* 0x68 */ _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK,
229 /* 0x70 */ _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK,
230 /* 0x78 */ _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK, _UNK,
231 /* 0x80 */ 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
232 /* 0x88 */ 0x7C,
233 };
234