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1/******************************************************************************
2 *
3 * Module Name: evglock - Global Lock support
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2011, 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#include <acpi/acpi.h>
45#include "accommon.h"
46#include "acevents.h"
47#include "acinterp.h"
48
49#define _COMPONENT ACPI_EVENTS
50ACPI_MODULE_NAME("evglock")
51
52/* Local prototypes */
53static u32 acpi_ev_global_lock_handler(void *context);
54
55/*******************************************************************************
56 *
57 * FUNCTION: acpi_ev_init_global_lock_handler
58 *
59 * PARAMETERS: None
60 *
61 * RETURN: Status
62 *
63 * DESCRIPTION: Install a handler for the global lock release event
64 *
65 ******************************************************************************/
66
67acpi_status acpi_ev_init_global_lock_handler(void)
68{
69 acpi_status status;
70
71 ACPI_FUNCTION_TRACE(ev_init_global_lock_handler);
72
73 /* Attempt installation of the global lock handler */
74
75 status = acpi_install_fixed_event_handler(ACPI_EVENT_GLOBAL,
76 acpi_ev_global_lock_handler,
77 NULL);
78
79 /*
80 * If the global lock does not exist on this platform, the attempt to
81 * enable GBL_STATUS will fail (the GBL_ENABLE bit will not stick).
82 * Map to AE_OK, but mark global lock as not present. Any attempt to
83 * actually use the global lock will be flagged with an error.
84 */
85 acpi_gbl_global_lock_present = FALSE;
86 if (status == AE_NO_HARDWARE_RESPONSE) {
87 ACPI_ERROR((AE_INFO,
88 "No response from Global Lock hardware, disabling lock"));
89
90 return_ACPI_STATUS(AE_OK);
91 }
92
93 status = acpi_os_create_lock(&acpi_gbl_global_lock_pending_lock);
94 if (ACPI_FAILURE(status)) {
95 return_ACPI_STATUS(status);
96 }
97
98 acpi_gbl_global_lock_pending = FALSE;
99 acpi_gbl_global_lock_present = TRUE;
100 return_ACPI_STATUS(status);
101}
102
103/*******************************************************************************
104 *
105 * FUNCTION: acpi_ev_remove_global_lock_handler
106 *
107 * PARAMETERS: None
108 *
109 * RETURN: Status
110 *
111 * DESCRIPTION: Remove the handler for the Global Lock
112 *
113 ******************************************************************************/
114
115acpi_status acpi_ev_remove_global_lock_handler(void)
116{
117 acpi_status status;
118
119 ACPI_FUNCTION_TRACE(ev_remove_global_lock_handler);
120
121 acpi_gbl_global_lock_present = FALSE;
122 status = acpi_remove_fixed_event_handler(ACPI_EVENT_GLOBAL,
123 acpi_ev_global_lock_handler);
124
125 return_ACPI_STATUS(status);
126}
127
128/*******************************************************************************
129 *
130 * FUNCTION: acpi_ev_global_lock_handler
131 *
132 * PARAMETERS: Context - From thread interface, not used
133 *
134 * RETURN: ACPI_INTERRUPT_HANDLED
135 *
136 * DESCRIPTION: Invoked directly from the SCI handler when a global lock
137 * release interrupt occurs. If there is actually a pending
138 * request for the lock, signal the waiting thread.
139 *
140 ******************************************************************************/
141
142static u32 acpi_ev_global_lock_handler(void *context)
143{
144 acpi_status status;
145 acpi_cpu_flags flags;
146
147 flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock);
148
149 /*
150 * If a request for the global lock is not actually pending,
151 * we are done. This handles "spurious" global lock interrupts
152 * which are possible (and have been seen) with bad BIOSs.
153 */
154 if (!acpi_gbl_global_lock_pending) {
155 goto cleanup_and_exit;
156 }
157
158 /*
159 * Send a unit to the global lock semaphore. The actual acquisition
160 * of the global lock will be performed by the waiting thread.
161 */
162 status = acpi_os_signal_semaphore(acpi_gbl_global_lock_semaphore, 1);
163 if (ACPI_FAILURE(status)) {
164 ACPI_ERROR((AE_INFO, "Could not signal Global Lock semaphore"));
165 }
166
167 acpi_gbl_global_lock_pending = FALSE;
168
169 cleanup_and_exit:
170
171 acpi_os_release_lock(acpi_gbl_global_lock_pending_lock, flags);
172 return (ACPI_INTERRUPT_HANDLED);
173}
174
175/******************************************************************************
176 *
177 * FUNCTION: acpi_ev_acquire_global_lock
178 *
179 * PARAMETERS: Timeout - Max time to wait for the lock, in millisec.
180 *
181 * RETURN: Status
182 *
183 * DESCRIPTION: Attempt to gain ownership of the Global Lock.
184 *
185 * MUTEX: Interpreter must be locked
186 *
187 * Note: The original implementation allowed multiple threads to "acquire" the
188 * Global Lock, and the OS would hold the lock until the last thread had
189 * released it. However, this could potentially starve the BIOS out of the
190 * lock, especially in the case where there is a tight handshake between the
191 * Embedded Controller driver and the BIOS. Therefore, this implementation
192 * allows only one thread to acquire the HW Global Lock at a time, and makes
193 * the global lock appear as a standard mutex on the OS side.
194 *
195 *****************************************************************************/
196
197acpi_status acpi_ev_acquire_global_lock(u16 timeout)
198{
199 acpi_cpu_flags flags;
200 acpi_status status;
201 u8 acquired = FALSE;
202
203 ACPI_FUNCTION_TRACE(ev_acquire_global_lock);
204
205 /*
206 * Only one thread can acquire the GL at a time, the global_lock_mutex
207 * enforces this. This interface releases the interpreter if we must wait.
208 */
209 status =
210 acpi_ex_system_wait_mutex(acpi_gbl_global_lock_mutex->mutex.
211 os_mutex, timeout);
212 if (ACPI_FAILURE(status)) {
213 return_ACPI_STATUS(status);
214 }
215
216 /*
217 * Update the global lock handle and check for wraparound. The handle is
218 * only used for the external global lock interfaces, but it is updated
219 * here to properly handle the case where a single thread may acquire the
220 * lock via both the AML and the acpi_acquire_global_lock interfaces. The
221 * handle is therefore updated on the first acquire from a given thread
222 * regardless of where the acquisition request originated.
223 */
224 acpi_gbl_global_lock_handle++;
225 if (acpi_gbl_global_lock_handle == 0) {
226 acpi_gbl_global_lock_handle = 1;
227 }
228
229 /*
230 * Make sure that a global lock actually exists. If not, just
231 * treat the lock as a standard mutex.
232 */
233 if (!acpi_gbl_global_lock_present) {
234 acpi_gbl_global_lock_acquired = TRUE;
235 return_ACPI_STATUS(AE_OK);
236 }
237
238 flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock);
239
240 do {
241
242 /* Attempt to acquire the actual hardware lock */
243
244 ACPI_ACQUIRE_GLOBAL_LOCK(acpi_gbl_FACS, acquired);
245 if (acquired) {
246 acpi_gbl_global_lock_acquired = TRUE;
247 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
248 "Acquired hardware Global Lock\n"));
249 break;
250 }
251
252 /*
253 * Did not get the lock. The pending bit was set above, and
254 * we must now wait until we receive the global lock
255 * released interrupt.
256 */
257 acpi_gbl_global_lock_pending = TRUE;
258 acpi_os_release_lock(acpi_gbl_global_lock_pending_lock, flags);
259
260 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
261 "Waiting for hardware Global Lock\n"));
262
263 /*
264 * Wait for handshake with the global lock interrupt handler.
265 * This interface releases the interpreter if we must wait.
266 */
267 status =
268 acpi_ex_system_wait_semaphore
269 (acpi_gbl_global_lock_semaphore, ACPI_WAIT_FOREVER);
270
271 flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock);
272
273 } while (ACPI_SUCCESS(status));
274
275 acpi_gbl_global_lock_pending = FALSE;
276 acpi_os_release_lock(acpi_gbl_global_lock_pending_lock, flags);
277
278 return_ACPI_STATUS(status);
279}
280
281/*******************************************************************************
282 *
283 * FUNCTION: acpi_ev_release_global_lock
284 *
285 * PARAMETERS: None
286 *
287 * RETURN: Status
288 *
289 * DESCRIPTION: Releases ownership of the Global Lock.
290 *
291 ******************************************************************************/
292
293acpi_status acpi_ev_release_global_lock(void)
294{
295 u8 pending = FALSE;
296 acpi_status status = AE_OK;
297
298 ACPI_FUNCTION_TRACE(ev_release_global_lock);
299
300 /* Lock must be already acquired */
301
302 if (!acpi_gbl_global_lock_acquired) {
303 ACPI_WARNING((AE_INFO,
304 "Cannot release the ACPI Global Lock, it has not been acquired"));
305 return_ACPI_STATUS(AE_NOT_ACQUIRED);
306 }
307
308 if (acpi_gbl_global_lock_present) {
309
310 /* Allow any thread to release the lock */
311
312 ACPI_RELEASE_GLOBAL_LOCK(acpi_gbl_FACS, pending);
313
314 /*
315 * If the pending bit was set, we must write GBL_RLS to the control
316 * register
317 */
318 if (pending) {
319 status =
320 acpi_write_bit_register
321 (ACPI_BITREG_GLOBAL_LOCK_RELEASE,
322 ACPI_ENABLE_EVENT);
323 }
324
325 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
326 "Released hardware Global Lock\n"));
327 }
328
329 acpi_gbl_global_lock_acquired = FALSE;
330
331 /* Release the local GL mutex */
332
333 acpi_os_release_mutex(acpi_gbl_global_lock_mutex->mutex.os_mutex);
334 return_ACPI_STATUS(status);
335}
1/******************************************************************************
2 *
3 * Module Name: evglock - Global Lock support
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2016, 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#include <acpi/acpi.h>
45#include "accommon.h"
46#include "acevents.h"
47#include "acinterp.h"
48
49#define _COMPONENT ACPI_EVENTS
50ACPI_MODULE_NAME("evglock")
51#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
52/* Local prototypes */
53static u32 acpi_ev_global_lock_handler(void *context);
54
55/*******************************************************************************
56 *
57 * FUNCTION: acpi_ev_init_global_lock_handler
58 *
59 * PARAMETERS: None
60 *
61 * RETURN: Status
62 *
63 * DESCRIPTION: Install a handler for the global lock release event
64 *
65 ******************************************************************************/
66
67acpi_status acpi_ev_init_global_lock_handler(void)
68{
69 acpi_status status;
70
71 ACPI_FUNCTION_TRACE(ev_init_global_lock_handler);
72
73 /* If Hardware Reduced flag is set, there is no global lock */
74
75 if (acpi_gbl_reduced_hardware) {
76 return_ACPI_STATUS(AE_OK);
77 }
78
79 /* Attempt installation of the global lock handler */
80
81 status = acpi_install_fixed_event_handler(ACPI_EVENT_GLOBAL,
82 acpi_ev_global_lock_handler,
83 NULL);
84
85 /*
86 * If the global lock does not exist on this platform, the attempt to
87 * enable GBL_STATUS will fail (the GBL_ENABLE bit will not stick).
88 * Map to AE_OK, but mark global lock as not present. Any attempt to
89 * actually use the global lock will be flagged with an error.
90 */
91 acpi_gbl_global_lock_present = FALSE;
92 if (status == AE_NO_HARDWARE_RESPONSE) {
93 ACPI_ERROR((AE_INFO,
94 "No response from Global Lock hardware, disabling lock"));
95
96 return_ACPI_STATUS(AE_OK);
97 }
98
99 status = acpi_os_create_lock(&acpi_gbl_global_lock_pending_lock);
100 if (ACPI_FAILURE(status)) {
101 return_ACPI_STATUS(status);
102 }
103
104 acpi_gbl_global_lock_pending = FALSE;
105 acpi_gbl_global_lock_present = TRUE;
106 return_ACPI_STATUS(status);
107}
108
109/*******************************************************************************
110 *
111 * FUNCTION: acpi_ev_remove_global_lock_handler
112 *
113 * PARAMETERS: None
114 *
115 * RETURN: Status
116 *
117 * DESCRIPTION: Remove the handler for the Global Lock
118 *
119 ******************************************************************************/
120
121acpi_status acpi_ev_remove_global_lock_handler(void)
122{
123 acpi_status status;
124
125 ACPI_FUNCTION_TRACE(ev_remove_global_lock_handler);
126
127 acpi_gbl_global_lock_present = FALSE;
128 status = acpi_remove_fixed_event_handler(ACPI_EVENT_GLOBAL,
129 acpi_ev_global_lock_handler);
130
131 acpi_os_delete_lock(acpi_gbl_global_lock_pending_lock);
132 return_ACPI_STATUS(status);
133}
134
135/*******************************************************************************
136 *
137 * FUNCTION: acpi_ev_global_lock_handler
138 *
139 * PARAMETERS: context - From thread interface, not used
140 *
141 * RETURN: ACPI_INTERRUPT_HANDLED
142 *
143 * DESCRIPTION: Invoked directly from the SCI handler when a global lock
144 * release interrupt occurs. If there is actually a pending
145 * request for the lock, signal the waiting thread.
146 *
147 ******************************************************************************/
148
149static u32 acpi_ev_global_lock_handler(void *context)
150{
151 acpi_status status;
152 acpi_cpu_flags flags;
153
154 flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock);
155
156 /*
157 * If a request for the global lock is not actually pending,
158 * we are done. This handles "spurious" global lock interrupts
159 * which are possible (and have been seen) with bad BIOSs.
160 */
161 if (!acpi_gbl_global_lock_pending) {
162 goto cleanup_and_exit;
163 }
164
165 /*
166 * Send a unit to the global lock semaphore. The actual acquisition
167 * of the global lock will be performed by the waiting thread.
168 */
169 status = acpi_os_signal_semaphore(acpi_gbl_global_lock_semaphore, 1);
170 if (ACPI_FAILURE(status)) {
171 ACPI_ERROR((AE_INFO, "Could not signal Global Lock semaphore"));
172 }
173
174 acpi_gbl_global_lock_pending = FALSE;
175
176cleanup_and_exit:
177
178 acpi_os_release_lock(acpi_gbl_global_lock_pending_lock, flags);
179 return (ACPI_INTERRUPT_HANDLED);
180}
181
182/******************************************************************************
183 *
184 * FUNCTION: acpi_ev_acquire_global_lock
185 *
186 * PARAMETERS: timeout - Max time to wait for the lock, in millisec.
187 *
188 * RETURN: Status
189 *
190 * DESCRIPTION: Attempt to gain ownership of the Global Lock.
191 *
192 * MUTEX: Interpreter must be locked
193 *
194 * Note: The original implementation allowed multiple threads to "acquire" the
195 * Global Lock, and the OS would hold the lock until the last thread had
196 * released it. However, this could potentially starve the BIOS out of the
197 * lock, especially in the case where there is a tight handshake between the
198 * Embedded Controller driver and the BIOS. Therefore, this implementation
199 * allows only one thread to acquire the HW Global Lock at a time, and makes
200 * the global lock appear as a standard mutex on the OS side.
201 *
202 *****************************************************************************/
203
204acpi_status acpi_ev_acquire_global_lock(u16 timeout)
205{
206 acpi_cpu_flags flags;
207 acpi_status status;
208 u8 acquired = FALSE;
209
210 ACPI_FUNCTION_TRACE(ev_acquire_global_lock);
211
212 /*
213 * Only one thread can acquire the GL at a time, the global_lock_mutex
214 * enforces this. This interface releases the interpreter if we must wait.
215 */
216 status =
217 acpi_ex_system_wait_mutex(acpi_gbl_global_lock_mutex->mutex.
218 os_mutex, timeout);
219 if (ACPI_FAILURE(status)) {
220 return_ACPI_STATUS(status);
221 }
222
223 /*
224 * Update the global lock handle and check for wraparound. The handle is
225 * only used for the external global lock interfaces, but it is updated
226 * here to properly handle the case where a single thread may acquire the
227 * lock via both the AML and the acpi_acquire_global_lock interfaces. The
228 * handle is therefore updated on the first acquire from a given thread
229 * regardless of where the acquisition request originated.
230 */
231 acpi_gbl_global_lock_handle++;
232 if (acpi_gbl_global_lock_handle == 0) {
233 acpi_gbl_global_lock_handle = 1;
234 }
235
236 /*
237 * Make sure that a global lock actually exists. If not, just
238 * treat the lock as a standard mutex.
239 */
240 if (!acpi_gbl_global_lock_present) {
241 acpi_gbl_global_lock_acquired = TRUE;
242 return_ACPI_STATUS(AE_OK);
243 }
244
245 flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock);
246
247 do {
248
249 /* Attempt to acquire the actual hardware lock */
250
251 ACPI_ACQUIRE_GLOBAL_LOCK(acpi_gbl_FACS, acquired);
252 if (acquired) {
253 acpi_gbl_global_lock_acquired = TRUE;
254 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
255 "Acquired hardware Global Lock\n"));
256 break;
257 }
258
259 /*
260 * Did not get the lock. The pending bit was set above, and
261 * we must now wait until we receive the global lock
262 * released interrupt.
263 */
264 acpi_gbl_global_lock_pending = TRUE;
265 acpi_os_release_lock(acpi_gbl_global_lock_pending_lock, flags);
266
267 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
268 "Waiting for hardware Global Lock\n"));
269
270 /*
271 * Wait for handshake with the global lock interrupt handler.
272 * This interface releases the interpreter if we must wait.
273 */
274 status =
275 acpi_ex_system_wait_semaphore
276 (acpi_gbl_global_lock_semaphore, ACPI_WAIT_FOREVER);
277
278 flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock);
279
280 } while (ACPI_SUCCESS(status));
281
282 acpi_gbl_global_lock_pending = FALSE;
283 acpi_os_release_lock(acpi_gbl_global_lock_pending_lock, flags);
284
285 return_ACPI_STATUS(status);
286}
287
288/*******************************************************************************
289 *
290 * FUNCTION: acpi_ev_release_global_lock
291 *
292 * PARAMETERS: None
293 *
294 * RETURN: Status
295 *
296 * DESCRIPTION: Releases ownership of the Global Lock.
297 *
298 ******************************************************************************/
299
300acpi_status acpi_ev_release_global_lock(void)
301{
302 u8 pending = FALSE;
303 acpi_status status = AE_OK;
304
305 ACPI_FUNCTION_TRACE(ev_release_global_lock);
306
307 /* Lock must be already acquired */
308
309 if (!acpi_gbl_global_lock_acquired) {
310 ACPI_WARNING((AE_INFO,
311 "Cannot release the ACPI Global Lock, it has not been acquired"));
312 return_ACPI_STATUS(AE_NOT_ACQUIRED);
313 }
314
315 if (acpi_gbl_global_lock_present) {
316
317 /* Allow any thread to release the lock */
318
319 ACPI_RELEASE_GLOBAL_LOCK(acpi_gbl_FACS, pending);
320
321 /*
322 * If the pending bit was set, we must write GBL_RLS to the control
323 * register
324 */
325 if (pending) {
326 status =
327 acpi_write_bit_register
328 (ACPI_BITREG_GLOBAL_LOCK_RELEASE,
329 ACPI_ENABLE_EVENT);
330 }
331
332 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
333 "Released hardware Global Lock\n"));
334 }
335
336 acpi_gbl_global_lock_acquired = FALSE;
337
338 /* Release the local GL mutex */
339
340 acpi_os_release_mutex(acpi_gbl_global_lock_mutex->mutex.os_mutex);
341 return_ACPI_STATUS(status);
342}
343
344#endif /* !ACPI_REDUCED_HARDWARE */