1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2 /******************************************************************************
3  *
4  * Module Name: exdebug - Support for stores to the AML Debug Object
5  *
6  * Copyright (C) 2000 - 2021, Intel Corp.
7  *
8  *****************************************************************************/
9 
10 #include <acpi/acpi.h>
11 #include "accommon.h"
12 #include "acinterp.h"
13 
14 #define _COMPONENT          ACPI_EXECUTER
15 ACPI_MODULE_NAME("exdebug")
16 
17 #ifndef ACPI_NO_ERROR_MESSAGES
18 /*******************************************************************************
19  *
20  * FUNCTION:    acpi_ex_do_debug_object
21  *
22  * PARAMETERS:  source_desc         - Object to be output to "Debug Object"
23  *              level               - Indentation level (used for packages)
24  *              index               - Current package element, zero if not pkg
25  *
26  * RETURN:      None
27  *
28  * DESCRIPTION: Handles stores to the AML Debug Object. For example:
29  *              Store(INT1, Debug)
30  *
31  * This function is not compiled if ACPI_NO_ERROR_MESSAGES is set.
32  *
33  * This function is only enabled if acpi_gbl_enable_aml_debug_object is set, or
34  * if ACPI_LV_DEBUG_OBJECT is set in the acpi_dbg_level. Thus, in the normal
35  * operational case, stores to the debug object are ignored but can be easily
36  * enabled if necessary.
37  *
38  ******************************************************************************/
39 void
acpi_ex_do_debug_object(union acpi_operand_object * source_desc,u32 level,u32 index)40 acpi_ex_do_debug_object(union acpi_operand_object *source_desc,
41 			u32 level, u32 index)
42 {
43 	u32 i;
44 	u32 timer;
45 	union acpi_operand_object *object_desc;
46 	u32 value;
47 
48 	ACPI_FUNCTION_TRACE_PTR(ex_do_debug_object, source_desc);
49 
50 	/* Output must be enabled via the debug_object global or the dbg_level */
51 
52 	if (!acpi_gbl_enable_aml_debug_object &&
53 	    !(acpi_dbg_level & ACPI_LV_DEBUG_OBJECT)) {
54 		return_VOID;
55 	}
56 
57 	/* Newline -- don't emit the line header */
58 
59 	if (source_desc &&
60 	    (ACPI_GET_DESCRIPTOR_TYPE(source_desc) == ACPI_DESC_TYPE_OPERAND) &&
61 	    (source_desc->common.type == ACPI_TYPE_STRING)) {
62 		if ((source_desc->string.length == 1) &&
63 		    (*source_desc->string.pointer == '\n')) {
64 			acpi_os_printf("\n");
65 			return_VOID;
66 		}
67 	}
68 
69 	/*
70 	 * Print line header as long as we are not in the middle of an
71 	 * object display
72 	 */
73 	if (!((level > 0) && index == 0)) {
74 		if (acpi_gbl_display_debug_timer) {
75 			/*
76 			 * We will emit the current timer value (in microseconds) with each
77 			 * debug output. Only need the lower 26 bits. This allows for 67
78 			 * million microseconds or 67 seconds before rollover.
79 			 *
80 			 * Convert 100 nanosecond units to microseconds
81 			 */
82 			timer = ((u32)acpi_os_get_timer() / 10);
83 			timer &= 0x03FFFFFF;
84 
85 			acpi_os_printf("ACPI Debug: T=0x%8.8X %*s", timer,
86 				       level, " ");
87 		} else {
88 			acpi_os_printf("ACPI Debug: %*s", level, " ");
89 		}
90 	}
91 
92 	/* Display the index for package output only */
93 
94 	if (index > 0) {
95 		acpi_os_printf("(%.2u) ", index - 1);
96 	}
97 
98 	if (!source_desc) {
99 		acpi_os_printf("[Null Object]\n");
100 		return_VOID;
101 	}
102 
103 	if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) == ACPI_DESC_TYPE_OPERAND) {
104 
105 		/* No object type prefix needed for integers and strings */
106 
107 		if ((source_desc->common.type != ACPI_TYPE_INTEGER) &&
108 		    (source_desc->common.type != ACPI_TYPE_STRING)) {
109 			acpi_os_printf("%s ",
110 				       acpi_ut_get_object_type_name
111 				       (source_desc));
112 		}
113 
114 		if (!acpi_ut_valid_internal_object(source_desc)) {
115 			acpi_os_printf("%p, Invalid Internal Object!\n",
116 				       source_desc);
117 			return_VOID;
118 		}
119 	} else if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) ==
120 		   ACPI_DESC_TYPE_NAMED) {
121 		acpi_os_printf("%s (Node %p)\n",
122 			       acpi_ut_get_type_name(((struct
123 						       acpi_namespace_node *)
124 						      source_desc)->type),
125 			       source_desc);
126 		return_VOID;
127 	} else {
128 		return_VOID;
129 	}
130 
131 	/* source_desc is of type ACPI_DESC_TYPE_OPERAND */
132 
133 	switch (source_desc->common.type) {
134 	case ACPI_TYPE_INTEGER:
135 
136 		/* Output correct integer width */
137 
138 		if (acpi_gbl_integer_byte_width == 4) {
139 			acpi_os_printf("0x%8.8X\n",
140 				       (u32)source_desc->integer.value);
141 		} else {
142 			acpi_os_printf("0x%8.8X%8.8X\n",
143 				       ACPI_FORMAT_UINT64(source_desc->integer.
144 							  value));
145 		}
146 		break;
147 
148 	case ACPI_TYPE_BUFFER:
149 
150 		acpi_os_printf("[0x%.2X]\n", (u32)source_desc->buffer.length);
151 		acpi_ut_dump_buffer(source_desc->buffer.pointer,
152 				    (source_desc->buffer.length < 256) ?
153 				    source_desc->buffer.length : 256,
154 				    DB_BYTE_DISPLAY, 0);
155 		break;
156 
157 	case ACPI_TYPE_STRING:
158 
159 		acpi_os_printf("\"%s\"\n", source_desc->string.pointer);
160 		break;
161 
162 	case ACPI_TYPE_PACKAGE:
163 
164 		acpi_os_printf("(Contains 0x%.2X Elements):\n",
165 			       source_desc->package.count);
166 
167 		/* Output the entire contents of the package */
168 
169 		for (i = 0; i < source_desc->package.count; i++) {
170 			acpi_ex_do_debug_object(source_desc->package.
171 						elements[i], level + 4, i + 1);
172 		}
173 		break;
174 
175 	case ACPI_TYPE_LOCAL_REFERENCE:
176 
177 		acpi_os_printf("[%s] ",
178 			       acpi_ut_get_reference_name(source_desc));
179 
180 		/* Decode the reference */
181 
182 		switch (source_desc->reference.class) {
183 		case ACPI_REFCLASS_INDEX:
184 
185 			acpi_os_printf("0x%X\n", source_desc->reference.value);
186 			break;
187 
188 		case ACPI_REFCLASS_TABLE:
189 
190 			/* Case for ddb_handle */
191 
192 			acpi_os_printf("Table Index 0x%X\n",
193 				       source_desc->reference.value);
194 			return_VOID;
195 
196 		default:
197 
198 			break;
199 		}
200 
201 		acpi_os_printf(" ");
202 
203 		/* Check for valid node first, then valid object */
204 
205 		if (source_desc->reference.node) {
206 			if (ACPI_GET_DESCRIPTOR_TYPE
207 			    (source_desc->reference.node) !=
208 			    ACPI_DESC_TYPE_NAMED) {
209 				acpi_os_printf
210 				    (" %p - Not a valid namespace node\n",
211 				     source_desc->reference.node);
212 			} else {
213 				acpi_os_printf("Node %p [%4.4s] ",
214 					       source_desc->reference.node,
215 					       (source_desc->reference.node)->
216 					       name.ascii);
217 
218 				switch ((source_desc->reference.node)->type) {
219 
220 					/* These types have no attached object */
221 
222 				case ACPI_TYPE_DEVICE:
223 					acpi_os_printf("Device\n");
224 					break;
225 
226 				case ACPI_TYPE_THERMAL:
227 					acpi_os_printf("Thermal Zone\n");
228 					break;
229 
230 				default:
231 
232 					acpi_ex_do_debug_object((source_desc->
233 								 reference.
234 								 node)->object,
235 								level + 4, 0);
236 					break;
237 				}
238 			}
239 		} else if (source_desc->reference.object) {
240 			if (ACPI_GET_DESCRIPTOR_TYPE
241 			    (source_desc->reference.object) ==
242 			    ACPI_DESC_TYPE_NAMED) {
243 
244 				/* Reference object is a namespace node */
245 
246 				acpi_ex_do_debug_object(ACPI_CAST_PTR
247 							(union
248 							 acpi_operand_object,
249 							 source_desc->reference.
250 							 object), level + 4, 0);
251 			} else {
252 				object_desc = source_desc->reference.object;
253 				value = source_desc->reference.value;
254 
255 				switch (object_desc->common.type) {
256 				case ACPI_TYPE_BUFFER:
257 
258 					acpi_os_printf("Buffer[%u] = 0x%2.2X\n",
259 						       value,
260 						       *source_desc->reference.
261 						       index_pointer);
262 					break;
263 
264 				case ACPI_TYPE_STRING:
265 
266 					acpi_os_printf
267 					    ("String[%u] = \"%c\" (0x%2.2X)\n",
268 					     value,
269 					     *source_desc->reference.
270 					     index_pointer,
271 					     *source_desc->reference.
272 					     index_pointer);
273 					break;
274 
275 				case ACPI_TYPE_PACKAGE:
276 
277 					acpi_os_printf("Package[%u] = ", value);
278 					if (!(*source_desc->reference.where)) {
279 						acpi_os_printf
280 						    ("[Uninitialized Package Element]\n");
281 					} else {
282 						acpi_ex_do_debug_object
283 						    (*source_desc->reference.
284 						     where, level + 4, 0);
285 					}
286 					break;
287 
288 				default:
289 
290 					acpi_os_printf
291 					    ("Unknown Reference object type %X\n",
292 					     object_desc->common.type);
293 					break;
294 				}
295 			}
296 		}
297 		break;
298 
299 	default:
300 
301 		acpi_os_printf("(Descriptor %p)\n", source_desc);
302 		break;
303 	}
304 
305 	ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "\n"));
306 	return_VOID;
307 }
308 #endif
309