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1 /******************************************************************************
2  *
3  * Module Name: utglobal - Global variables for the ACPI subsystem
4  *
5  *****************************************************************************/
6 
7 /*
8  * Copyright (C) 2000 - 2013, Intel Corp.
9  * All rights reserved.
10  *
11  * Redistribution and use in source and binary forms, with or without
12  * modification, are permitted provided that the following conditions
13  * are met:
14  * 1. Redistributions of source code must retain the above copyright
15  *    notice, this list of conditions, and the following disclaimer,
16  *    without modification.
17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18  *    substantially similar to the "NO WARRANTY" disclaimer below
19  *    ("Disclaimer") and any redistribution must be conditioned upon
20  *    including a substantially similar Disclaimer requirement for further
21  *    binary redistribution.
22  * 3. Neither the names of the above-listed copyright holders nor the names
23  *    of any contributors may be used to endorse or promote products derived
24  *    from this software without specific prior written permission.
25  *
26  * Alternatively, this software may be distributed under the terms of the
27  * GNU General Public License ("GPL") version 2 as published by the Free
28  * Software Foundation.
29  *
30  * NO WARRANTY
31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41  * POSSIBILITY OF SUCH DAMAGES.
42  */
43 
44 #define DEFINE_ACPI_GLOBALS
45 
46 #include <linux/export.h>
47 #include <acpi/acpi.h>
48 #include "accommon.h"
49 
50 #define _COMPONENT          ACPI_UTILITIES
51 ACPI_MODULE_NAME("utglobal")
52 
53 /*******************************************************************************
54  *
55  * Static global variable initialization.
56  *
57  ******************************************************************************/
58 /*
59  * We want the debug switches statically initialized so they
60  * are already set when the debugger is entered.
61  */
62 /* Debug switch - level and trace mask */
63 u32 acpi_dbg_level = ACPI_DEBUG_DEFAULT;
64 
65 /* Debug switch - layer (component) mask */
66 
67 u32 acpi_dbg_layer = 0;
68 u32 acpi_gbl_nesting_level = 0;
69 
70 /* Debugger globals */
71 
72 u8 acpi_gbl_db_terminate_threads = FALSE;
73 u8 acpi_gbl_abort_method = FALSE;
74 u8 acpi_gbl_method_executing = FALSE;
75 
76 /* System flags */
77 
78 u32 acpi_gbl_startup_flags = 0;
79 
80 /* System starts uninitialized */
81 
82 u8 acpi_gbl_shutdown = TRUE;
83 
84 const char *acpi_gbl_sleep_state_names[ACPI_S_STATE_COUNT] = {
85 	"\\_S0_",
86 	"\\_S1_",
87 	"\\_S2_",
88 	"\\_S3_",
89 	"\\_S4_",
90 	"\\_S5_"
91 };
92 
93 const char *acpi_gbl_lowest_dstate_names[ACPI_NUM_sx_w_METHODS] = {
94 	"_S0W",
95 	"_S1W",
96 	"_S2W",
97 	"_S3W",
98 	"_S4W"
99 };
100 
101 const char *acpi_gbl_highest_dstate_names[ACPI_NUM_sx_d_METHODS] = {
102 	"_S1D",
103 	"_S2D",
104 	"_S3D",
105 	"_S4D"
106 };
107 
108 /*******************************************************************************
109  *
110  * Namespace globals
111  *
112  ******************************************************************************/
113 /*
114  * Predefined ACPI Names (Built-in to the Interpreter)
115  *
116  * NOTES:
117  * 1) _SB_ is defined to be a device to allow \_SB_._INI to be run
118  *    during the initialization sequence.
119  * 2) _TZ_ is defined to be a thermal zone in order to allow ASL code to
120  *    perform a Notify() operation on it. 09/2010: Changed to type Device.
121  *    This still allows notifies, but does not confuse host code that
122  *    searches for valid thermal_zone objects.
123  */
124 const struct acpi_predefined_names acpi_gbl_pre_defined_names[] = {
125 	{"_GPE", ACPI_TYPE_LOCAL_SCOPE, NULL},
126 	{"_PR_", ACPI_TYPE_LOCAL_SCOPE, NULL},
127 	{"_SB_", ACPI_TYPE_DEVICE, NULL},
128 	{"_SI_", ACPI_TYPE_LOCAL_SCOPE, NULL},
129 	{"_TZ_", ACPI_TYPE_DEVICE, NULL},
130 	{"_REV", ACPI_TYPE_INTEGER, (char *)ACPI_CA_SUPPORT_LEVEL},
131 	{"_OS_", ACPI_TYPE_STRING, ACPI_OS_NAME},
132 	{"_GL_", ACPI_TYPE_MUTEX, (char *)1},
133 
134 #if !defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY)
135 	{"_OSI", ACPI_TYPE_METHOD, (char *)1},
136 #endif
137 
138 	/* Table terminator */
139 
140 	{NULL, ACPI_TYPE_ANY, NULL}
141 };
142 
143 #if (!ACPI_REDUCED_HARDWARE)
144 /******************************************************************************
145  *
146  * Event and Hardware globals
147  *
148  ******************************************************************************/
149 
150 struct acpi_bit_register_info acpi_gbl_bit_register_info[ACPI_NUM_BITREG] = {
151 	/* Name                                     Parent Register             Register Bit Position                   Register Bit Mask       */
152 
153 	/* ACPI_BITREG_TIMER_STATUS         */ {ACPI_REGISTER_PM1_STATUS,
154 						ACPI_BITPOSITION_TIMER_STATUS,
155 						ACPI_BITMASK_TIMER_STATUS},
156 	/* ACPI_BITREG_BUS_MASTER_STATUS    */ {ACPI_REGISTER_PM1_STATUS,
157 						ACPI_BITPOSITION_BUS_MASTER_STATUS,
158 						ACPI_BITMASK_BUS_MASTER_STATUS},
159 	/* ACPI_BITREG_GLOBAL_LOCK_STATUS   */ {ACPI_REGISTER_PM1_STATUS,
160 						ACPI_BITPOSITION_GLOBAL_LOCK_STATUS,
161 						ACPI_BITMASK_GLOBAL_LOCK_STATUS},
162 	/* ACPI_BITREG_POWER_BUTTON_STATUS  */ {ACPI_REGISTER_PM1_STATUS,
163 						ACPI_BITPOSITION_POWER_BUTTON_STATUS,
164 						ACPI_BITMASK_POWER_BUTTON_STATUS},
165 	/* ACPI_BITREG_SLEEP_BUTTON_STATUS  */ {ACPI_REGISTER_PM1_STATUS,
166 						ACPI_BITPOSITION_SLEEP_BUTTON_STATUS,
167 						ACPI_BITMASK_SLEEP_BUTTON_STATUS},
168 	/* ACPI_BITREG_RT_CLOCK_STATUS      */ {ACPI_REGISTER_PM1_STATUS,
169 						ACPI_BITPOSITION_RT_CLOCK_STATUS,
170 						ACPI_BITMASK_RT_CLOCK_STATUS},
171 	/* ACPI_BITREG_WAKE_STATUS          */ {ACPI_REGISTER_PM1_STATUS,
172 						ACPI_BITPOSITION_WAKE_STATUS,
173 						ACPI_BITMASK_WAKE_STATUS},
174 	/* ACPI_BITREG_PCIEXP_WAKE_STATUS   */ {ACPI_REGISTER_PM1_STATUS,
175 						ACPI_BITPOSITION_PCIEXP_WAKE_STATUS,
176 						ACPI_BITMASK_PCIEXP_WAKE_STATUS},
177 
178 	/* ACPI_BITREG_TIMER_ENABLE         */ {ACPI_REGISTER_PM1_ENABLE,
179 						ACPI_BITPOSITION_TIMER_ENABLE,
180 						ACPI_BITMASK_TIMER_ENABLE},
181 	/* ACPI_BITREG_GLOBAL_LOCK_ENABLE   */ {ACPI_REGISTER_PM1_ENABLE,
182 						ACPI_BITPOSITION_GLOBAL_LOCK_ENABLE,
183 						ACPI_BITMASK_GLOBAL_LOCK_ENABLE},
184 	/* ACPI_BITREG_POWER_BUTTON_ENABLE  */ {ACPI_REGISTER_PM1_ENABLE,
185 						ACPI_BITPOSITION_POWER_BUTTON_ENABLE,
186 						ACPI_BITMASK_POWER_BUTTON_ENABLE},
187 	/* ACPI_BITREG_SLEEP_BUTTON_ENABLE  */ {ACPI_REGISTER_PM1_ENABLE,
188 						ACPI_BITPOSITION_SLEEP_BUTTON_ENABLE,
189 						ACPI_BITMASK_SLEEP_BUTTON_ENABLE},
190 	/* ACPI_BITREG_RT_CLOCK_ENABLE      */ {ACPI_REGISTER_PM1_ENABLE,
191 						ACPI_BITPOSITION_RT_CLOCK_ENABLE,
192 						ACPI_BITMASK_RT_CLOCK_ENABLE},
193 	/* ACPI_BITREG_PCIEXP_WAKE_DISABLE  */ {ACPI_REGISTER_PM1_ENABLE,
194 						ACPI_BITPOSITION_PCIEXP_WAKE_DISABLE,
195 						ACPI_BITMASK_PCIEXP_WAKE_DISABLE},
196 
197 	/* ACPI_BITREG_SCI_ENABLE           */ {ACPI_REGISTER_PM1_CONTROL,
198 						ACPI_BITPOSITION_SCI_ENABLE,
199 						ACPI_BITMASK_SCI_ENABLE},
200 	/* ACPI_BITREG_BUS_MASTER_RLD       */ {ACPI_REGISTER_PM1_CONTROL,
201 						ACPI_BITPOSITION_BUS_MASTER_RLD,
202 						ACPI_BITMASK_BUS_MASTER_RLD},
203 	/* ACPI_BITREG_GLOBAL_LOCK_RELEASE  */ {ACPI_REGISTER_PM1_CONTROL,
204 						ACPI_BITPOSITION_GLOBAL_LOCK_RELEASE,
205 						ACPI_BITMASK_GLOBAL_LOCK_RELEASE},
206 	/* ACPI_BITREG_SLEEP_TYPE           */ {ACPI_REGISTER_PM1_CONTROL,
207 						ACPI_BITPOSITION_SLEEP_TYPE,
208 						ACPI_BITMASK_SLEEP_TYPE},
209 	/* ACPI_BITREG_SLEEP_ENABLE         */ {ACPI_REGISTER_PM1_CONTROL,
210 						ACPI_BITPOSITION_SLEEP_ENABLE,
211 						ACPI_BITMASK_SLEEP_ENABLE},
212 
213 	/* ACPI_BITREG_ARB_DIS              */ {ACPI_REGISTER_PM2_CONTROL,
214 						ACPI_BITPOSITION_ARB_DISABLE,
215 						ACPI_BITMASK_ARB_DISABLE}
216 };
217 
218 struct acpi_fixed_event_info acpi_gbl_fixed_event_info[ACPI_NUM_FIXED_EVENTS] = {
219 	/* ACPI_EVENT_PMTIMER       */ {ACPI_BITREG_TIMER_STATUS,
220 					ACPI_BITREG_TIMER_ENABLE,
221 					ACPI_BITMASK_TIMER_STATUS,
222 					ACPI_BITMASK_TIMER_ENABLE},
223 	/* ACPI_EVENT_GLOBAL        */ {ACPI_BITREG_GLOBAL_LOCK_STATUS,
224 					ACPI_BITREG_GLOBAL_LOCK_ENABLE,
225 					ACPI_BITMASK_GLOBAL_LOCK_STATUS,
226 					ACPI_BITMASK_GLOBAL_LOCK_ENABLE},
227 	/* ACPI_EVENT_POWER_BUTTON  */ {ACPI_BITREG_POWER_BUTTON_STATUS,
228 					ACPI_BITREG_POWER_BUTTON_ENABLE,
229 					ACPI_BITMASK_POWER_BUTTON_STATUS,
230 					ACPI_BITMASK_POWER_BUTTON_ENABLE},
231 	/* ACPI_EVENT_SLEEP_BUTTON  */ {ACPI_BITREG_SLEEP_BUTTON_STATUS,
232 					ACPI_BITREG_SLEEP_BUTTON_ENABLE,
233 					ACPI_BITMASK_SLEEP_BUTTON_STATUS,
234 					ACPI_BITMASK_SLEEP_BUTTON_ENABLE},
235 	/* ACPI_EVENT_RTC           */ {ACPI_BITREG_RT_CLOCK_STATUS,
236 					ACPI_BITREG_RT_CLOCK_ENABLE,
237 					ACPI_BITMASK_RT_CLOCK_STATUS,
238 					ACPI_BITMASK_RT_CLOCK_ENABLE},
239 };
240 #endif				/* !ACPI_REDUCED_HARDWARE */
241 
242 /*******************************************************************************
243  *
244  * FUNCTION:    acpi_ut_init_globals
245  *
246  * PARAMETERS:  None
247  *
248  * RETURN:      Status
249  *
250  * DESCRIPTION: Initialize ACPICA globals. All globals that require specific
251  *              initialization should be initialized here. This allows for
252  *              a warm restart.
253  *
254  ******************************************************************************/
255 
acpi_ut_init_globals(void)256 acpi_status acpi_ut_init_globals(void)
257 {
258 	acpi_status status;
259 	u32 i;
260 
261 	ACPI_FUNCTION_TRACE(ut_init_globals);
262 
263 	/* Create all memory caches */
264 
265 	status = acpi_ut_create_caches();
266 	if (ACPI_FAILURE(status)) {
267 		return_ACPI_STATUS(status);
268 	}
269 
270 	/* Address Range lists */
271 
272 	for (i = 0; i < ACPI_ADDRESS_RANGE_MAX; i++) {
273 		acpi_gbl_address_range_list[i] = NULL;
274 	}
275 
276 	/* Mutex locked flags */
277 
278 	for (i = 0; i < ACPI_NUM_MUTEX; i++) {
279 		acpi_gbl_mutex_info[i].mutex = NULL;
280 		acpi_gbl_mutex_info[i].thread_id = ACPI_MUTEX_NOT_ACQUIRED;
281 		acpi_gbl_mutex_info[i].use_count = 0;
282 	}
283 
284 	for (i = 0; i < ACPI_NUM_OWNERID_MASKS; i++) {
285 		acpi_gbl_owner_id_mask[i] = 0;
286 	}
287 
288 	/* Last owner_ID is never valid */
289 
290 	acpi_gbl_owner_id_mask[ACPI_NUM_OWNERID_MASKS - 1] = 0x80000000;
291 
292 #if (!ACPI_REDUCED_HARDWARE)
293 
294 	/* GPE support */
295 
296 	acpi_gbl_all_gpes_initialized = FALSE;
297 	acpi_gbl_gpe_xrupt_list_head = NULL;
298 	acpi_gbl_gpe_fadt_blocks[0] = NULL;
299 	acpi_gbl_gpe_fadt_blocks[1] = NULL;
300 	acpi_current_gpe_count = 0;
301 
302 	acpi_gbl_global_event_handler = NULL;
303 
304 #endif				/* !ACPI_REDUCED_HARDWARE */
305 
306 	/* Global handlers */
307 
308 	acpi_gbl_global_notify[0].handler = NULL;
309 	acpi_gbl_global_notify[1].handler = NULL;
310 	acpi_gbl_exception_handler = NULL;
311 	acpi_gbl_init_handler = NULL;
312 	acpi_gbl_table_handler = NULL;
313 	acpi_gbl_interface_handler = NULL;
314 
315 	/* Global Lock support */
316 
317 	acpi_gbl_global_lock_semaphore = NULL;
318 	acpi_gbl_global_lock_mutex = NULL;
319 	acpi_gbl_global_lock_acquired = FALSE;
320 	acpi_gbl_global_lock_handle = 0;
321 	acpi_gbl_global_lock_present = FALSE;
322 
323 	/* Miscellaneous variables */
324 
325 	acpi_gbl_DSDT = NULL;
326 	acpi_gbl_cm_single_step = FALSE;
327 	acpi_gbl_db_terminate_threads = FALSE;
328 	acpi_gbl_shutdown = FALSE;
329 	acpi_gbl_ns_lookup_count = 0;
330 	acpi_gbl_ps_find_count = 0;
331 	acpi_gbl_acpi_hardware_present = TRUE;
332 	acpi_gbl_last_owner_id_index = 0;
333 	acpi_gbl_next_owner_id_offset = 0;
334 	acpi_gbl_trace_method_name = 0;
335 	acpi_gbl_trace_dbg_level = 0;
336 	acpi_gbl_trace_dbg_layer = 0;
337 	acpi_gbl_debugger_configuration = DEBUGGER_THREADING;
338 	acpi_gbl_db_output_flags = ACPI_DB_CONSOLE_OUTPUT;
339 	acpi_gbl_osi_data = 0;
340 	acpi_gbl_osi_mutex = NULL;
341 	acpi_gbl_reg_methods_executed = FALSE;
342 
343 	/* Hardware oriented */
344 
345 	acpi_gbl_events_initialized = FALSE;
346 	acpi_gbl_system_awake_and_running = TRUE;
347 
348 	/* Namespace */
349 
350 	acpi_gbl_module_code_list = NULL;
351 	acpi_gbl_root_node = NULL;
352 	acpi_gbl_root_node_struct.name.integer = ACPI_ROOT_NAME;
353 	acpi_gbl_root_node_struct.descriptor_type = ACPI_DESC_TYPE_NAMED;
354 	acpi_gbl_root_node_struct.type = ACPI_TYPE_DEVICE;
355 	acpi_gbl_root_node_struct.parent = NULL;
356 	acpi_gbl_root_node_struct.child = NULL;
357 	acpi_gbl_root_node_struct.peer = NULL;
358 	acpi_gbl_root_node_struct.object = NULL;
359 
360 #ifdef ACPI_DISASSEMBLER
361 	acpi_gbl_external_list = NULL;
362 	acpi_gbl_num_external_methods = 0;
363 	acpi_gbl_resolved_external_methods = 0;
364 #endif
365 
366 #ifdef ACPI_DEBUG_OUTPUT
367 	acpi_gbl_lowest_stack_pointer = ACPI_CAST_PTR(acpi_size, ACPI_SIZE_MAX);
368 #endif
369 
370 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
371 	acpi_gbl_display_final_mem_stats = FALSE;
372 	acpi_gbl_disable_mem_tracking = FALSE;
373 #endif
374 
375 	return_ACPI_STATUS(AE_OK);
376 }
377 
378 /* Public globals */
379 
380 ACPI_EXPORT_SYMBOL(acpi_gbl_FADT)
381 ACPI_EXPORT_SYMBOL(acpi_dbg_level)
382 ACPI_EXPORT_SYMBOL(acpi_dbg_layer)
383 ACPI_EXPORT_SYMBOL(acpi_current_gpe_count)
384