xref: /openbmc/linux/drivers/acpi/acpica/utinit.c (revision ae40e94f)
1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2 /******************************************************************************
3  *
4  * Module Name: utinit - Common ACPI subsystem initialization
5  *
6  * Copyright (C) 2000 - 2019, Intel Corp.
7  *
8  *****************************************************************************/
9 
10 #include <acpi/acpi.h>
11 #include "accommon.h"
12 #include "acnamesp.h"
13 #include "acevents.h"
14 #include "actables.h"
15 
16 #define _COMPONENT          ACPI_UTILITIES
17 ACPI_MODULE_NAME("utinit")
18 
19 /* Local prototypes */
20 static void acpi_ut_terminate(void);
21 
22 #if (!ACPI_REDUCED_HARDWARE)
23 
24 static void acpi_ut_free_gpe_lists(void);
25 
26 #else
27 
28 #define acpi_ut_free_gpe_lists()
29 #endif				/* !ACPI_REDUCED_HARDWARE */
30 
31 #if (!ACPI_REDUCED_HARDWARE)
32 /******************************************************************************
33  *
34  * FUNCTION:    acpi_ut_free_gpe_lists
35  *
36  * PARAMETERS:  none
37  *
38  * RETURN:      none
39  *
40  * DESCRIPTION: Free global GPE lists
41  *
42  ******************************************************************************/
43 
44 static void acpi_ut_free_gpe_lists(void)
45 {
46 	struct acpi_gpe_block_info *gpe_block;
47 	struct acpi_gpe_block_info *next_gpe_block;
48 	struct acpi_gpe_xrupt_info *gpe_xrupt_info;
49 	struct acpi_gpe_xrupt_info *next_gpe_xrupt_info;
50 
51 	/* Free global GPE blocks and related info structures */
52 
53 	gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
54 	while (gpe_xrupt_info) {
55 		gpe_block = gpe_xrupt_info->gpe_block_list_head;
56 		while (gpe_block) {
57 			next_gpe_block = gpe_block->next;
58 			ACPI_FREE(gpe_block->event_info);
59 			ACPI_FREE(gpe_block->register_info);
60 			ACPI_FREE(gpe_block);
61 
62 			gpe_block = next_gpe_block;
63 		}
64 		next_gpe_xrupt_info = gpe_xrupt_info->next;
65 		ACPI_FREE(gpe_xrupt_info);
66 		gpe_xrupt_info = next_gpe_xrupt_info;
67 	}
68 }
69 #endif				/* !ACPI_REDUCED_HARDWARE */
70 
71 /*******************************************************************************
72  *
73  * FUNCTION:    acpi_ut_init_globals
74  *
75  * PARAMETERS:  None
76  *
77  * RETURN:      Status
78  *
79  * DESCRIPTION: Initialize ACPICA globals. All globals that require specific
80  *              initialization should be initialized here. This allows for
81  *              a warm restart.
82  *
83  ******************************************************************************/
84 
85 acpi_status acpi_ut_init_globals(void)
86 {
87 	acpi_status status;
88 	u32 i;
89 
90 	ACPI_FUNCTION_TRACE(ut_init_globals);
91 
92 	/* Create all memory caches */
93 
94 	status = acpi_ut_create_caches();
95 	if (ACPI_FAILURE(status)) {
96 		return_ACPI_STATUS(status);
97 	}
98 
99 	/* Address Range lists */
100 
101 	for (i = 0; i < ACPI_ADDRESS_RANGE_MAX; i++) {
102 		acpi_gbl_address_range_list[i] = NULL;
103 	}
104 
105 	/* Mutex locked flags */
106 
107 	for (i = 0; i < ACPI_NUM_MUTEX; i++) {
108 		acpi_gbl_mutex_info[i].mutex = NULL;
109 		acpi_gbl_mutex_info[i].thread_id = ACPI_MUTEX_NOT_ACQUIRED;
110 		acpi_gbl_mutex_info[i].use_count = 0;
111 	}
112 
113 	for (i = 0; i < ACPI_NUM_OWNERID_MASKS; i++) {
114 		acpi_gbl_owner_id_mask[i] = 0;
115 	}
116 
117 	/* Last owner_ID is never valid */
118 
119 	acpi_gbl_owner_id_mask[ACPI_NUM_OWNERID_MASKS - 1] = 0x80000000;
120 
121 	/* Event counters */
122 
123 	acpi_method_count = 0;
124 	acpi_sci_count = 0;
125 	acpi_gpe_count = 0;
126 
127 	for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) {
128 		acpi_fixed_event_count[i] = 0;
129 	}
130 
131 #if (!ACPI_REDUCED_HARDWARE)
132 
133 	/* GPE/SCI support */
134 
135 	acpi_gbl_all_gpes_initialized = FALSE;
136 	acpi_gbl_gpe_xrupt_list_head = NULL;
137 	acpi_gbl_gpe_fadt_blocks[0] = NULL;
138 	acpi_gbl_gpe_fadt_blocks[1] = NULL;
139 	acpi_current_gpe_count = 0;
140 
141 	acpi_gbl_global_event_handler = NULL;
142 	acpi_gbl_sci_handler_list = NULL;
143 
144 #endif				/* !ACPI_REDUCED_HARDWARE */
145 
146 	/* Global handlers */
147 
148 	acpi_gbl_global_notify[0].handler = NULL;
149 	acpi_gbl_global_notify[1].handler = NULL;
150 	acpi_gbl_exception_handler = NULL;
151 	acpi_gbl_init_handler = NULL;
152 	acpi_gbl_table_handler = NULL;
153 	acpi_gbl_interface_handler = NULL;
154 
155 	/* Global Lock support */
156 
157 	acpi_gbl_global_lock_semaphore = NULL;
158 	acpi_gbl_global_lock_mutex = NULL;
159 	acpi_gbl_global_lock_acquired = FALSE;
160 	acpi_gbl_global_lock_handle = 0;
161 	acpi_gbl_global_lock_present = FALSE;
162 
163 	/* Miscellaneous variables */
164 
165 	acpi_gbl_DSDT = NULL;
166 	acpi_gbl_cm_single_step = FALSE;
167 	acpi_gbl_shutdown = FALSE;
168 	acpi_gbl_ns_lookup_count = 0;
169 	acpi_gbl_ps_find_count = 0;
170 	acpi_gbl_acpi_hardware_present = TRUE;
171 	acpi_gbl_last_owner_id_index = 0;
172 	acpi_gbl_next_owner_id_offset = 0;
173 	acpi_gbl_debugger_configuration = DEBUGGER_THREADING;
174 	acpi_gbl_osi_mutex = NULL;
175 
176 	/* Hardware oriented */
177 
178 	acpi_gbl_events_initialized = FALSE;
179 	acpi_gbl_system_awake_and_running = TRUE;
180 
181 	/* Namespace */
182 
183 	acpi_gbl_module_code_list = NULL;
184 	acpi_gbl_root_node = NULL;
185 	acpi_gbl_root_node_struct.name.integer = ACPI_ROOT_NAME;
186 	acpi_gbl_root_node_struct.descriptor_type = ACPI_DESC_TYPE_NAMED;
187 	acpi_gbl_root_node_struct.type = ACPI_TYPE_DEVICE;
188 	acpi_gbl_root_node_struct.parent = NULL;
189 	acpi_gbl_root_node_struct.child = NULL;
190 	acpi_gbl_root_node_struct.peer = NULL;
191 	acpi_gbl_root_node_struct.object = NULL;
192 
193 #ifdef ACPI_DISASSEMBLER
194 	acpi_gbl_external_list = NULL;
195 	acpi_gbl_num_external_methods = 0;
196 	acpi_gbl_resolved_external_methods = 0;
197 #endif
198 
199 #ifdef ACPI_DEBUG_OUTPUT
200 	acpi_gbl_lowest_stack_pointer = ACPI_CAST_PTR(acpi_size, ACPI_SIZE_MAX);
201 #endif
202 
203 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
204 	acpi_gbl_display_final_mem_stats = FALSE;
205 	acpi_gbl_disable_mem_tracking = FALSE;
206 #endif
207 
208 	return_ACPI_STATUS(AE_OK);
209 }
210 
211 /******************************************************************************
212  *
213  * FUNCTION:    acpi_ut_terminate
214  *
215  * PARAMETERS:  none
216  *
217  * RETURN:      none
218  *
219  * DESCRIPTION: Free global memory
220  *
221  ******************************************************************************/
222 
223 static void acpi_ut_terminate(void)
224 {
225 	ACPI_FUNCTION_TRACE(ut_terminate);
226 
227 	acpi_ut_free_gpe_lists();
228 	acpi_ut_delete_address_lists();
229 	return_VOID;
230 }
231 
232 /*******************************************************************************
233  *
234  * FUNCTION:    acpi_ut_subsystem_shutdown
235  *
236  * PARAMETERS:  None
237  *
238  * RETURN:      None
239  *
240  * DESCRIPTION: Shutdown the various components. Do not delete the mutex
241  *              objects here, because the AML debugger may be still running.
242  *
243  ******************************************************************************/
244 
245 void acpi_ut_subsystem_shutdown(void)
246 {
247 	ACPI_FUNCTION_TRACE(ut_subsystem_shutdown);
248 
249 	/* Just exit if subsystem is already shutdown */
250 
251 	if (acpi_gbl_shutdown) {
252 		ACPI_ERROR((AE_INFO, "ACPI Subsystem is already terminated"));
253 		return_VOID;
254 	}
255 
256 	/* Subsystem appears active, go ahead and shut it down */
257 
258 	acpi_gbl_shutdown = TRUE;
259 	acpi_gbl_startup_flags = 0;
260 	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Shutting down ACPI Subsystem\n"));
261 
262 #ifndef ACPI_ASL_COMPILER
263 
264 	/* Close the acpi_event Handling */
265 
266 	acpi_ev_terminate();
267 
268 	/* Delete any dynamic _OSI interfaces */
269 
270 	acpi_ut_interface_terminate();
271 #endif
272 
273 	/* Close the Namespace */
274 
275 	acpi_ns_terminate();
276 
277 	/* Delete the ACPI tables */
278 
279 	acpi_tb_terminate();
280 
281 	/* Close the globals */
282 
283 	acpi_ut_terminate();
284 
285 	/* Purge the local caches */
286 
287 	(void)acpi_ut_delete_caches();
288 	return_VOID;
289 }
290