components/hardware/hwsleep.c

/* $MidnightBSD$ */
/******************************************************************************
 *
 * Name: hwsleep.c - ACPI Hardware Sleep/Wake Support functions for the
 *                   original/legacy sleep/PM registers.
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2016, Intel Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>

#define _COMPONENT          ACPI_HARDWARE
        ACPI_MODULE_NAME    ("hwsleep")


#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
/*******************************************************************************
 *
 * FUNCTION:    AcpiHwLegacySleep
 *
 * PARAMETERS:  SleepState          - Which sleep state to enter
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Enter a system sleep state via the legacy FADT PM registers
 *              THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
 *
 ******************************************************************************/

ACPI_STATUS
AcpiHwLegacySleep (
    UINT8                   SleepState)
{
    ACPI_BIT_REGISTER_INFO  *SleepTypeRegInfo;
    ACPI_BIT_REGISTER_INFO  *SleepEnableRegInfo;
    UINT32                  Pm1aControl;
    UINT32                  Pm1bControl;
    UINT32                  InValue;
    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE (HwLegacySleep);


    SleepTypeRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE);
    SleepEnableRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE);

    /* Clear wake status */

    Status = AcpiWriteBitRegister (ACPI_BITREG_WAKE_STATUS,
        ACPI_CLEAR_STATUS);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Clear all fixed and general purpose status bits */

    Status = AcpiHwClearAcpiStatus ();
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /*
     * 1) Disable/Clear all GPEs
     * 2) Enable all wakeup GPEs
     */
    Status = AcpiHwDisableAllGpes ();
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }
    AcpiGbl_SystemAwakeAndRunning = FALSE;

    Status = AcpiHwEnableAllWakeupGpes ();
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Get current value of PM1A control */

    Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL,
        &Pm1aControl);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }
    ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
        "Entering sleep state [S%u]\n", SleepState));

    /* Clear the SLP_EN and SLP_TYP fields */

    Pm1aControl &= ~(SleepTypeRegInfo->AccessBitMask |
         SleepEnableRegInfo->AccessBitMask);
    Pm1bControl = Pm1aControl;

    /* Insert the SLP_TYP bits */

    Pm1aControl |= (AcpiGbl_SleepTypeA << SleepTypeRegInfo->BitPosition);
    Pm1bControl |= (AcpiGbl_SleepTypeB << SleepTypeRegInfo->BitPosition);

    /*
     * We split the writes of SLP_TYP and SLP_EN to workaround
     * poorly implemented hardware.
     */

    /* Write #1: write the SLP_TYP data to the PM1 Control registers */

    Status = AcpiHwWritePm1Control (Pm1aControl, Pm1bControl);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Insert the sleep enable (SLP_EN) bit */

    Pm1aControl |= SleepEnableRegInfo->AccessBitMask;
    Pm1bControl |= SleepEnableRegInfo->AccessBitMask;

    /* Flush caches, as per ACPI specification */

    ACPI_FLUSH_CPU_CACHE ();

    Status = AcpiOsEnterSleep (SleepState, Pm1aControl, Pm1bControl);
    if (Status == AE_CTRL_TERMINATE)
    {
        return_ACPI_STATUS (AE_OK);
    }
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Write #2: Write both SLP_TYP + SLP_EN */

    Status = AcpiHwWritePm1Control (Pm1aControl, Pm1bControl);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    if (SleepState > ACPI_STATE_S3)
    {
        /*
         * We wanted to sleep > S3, but it didn't happen (by virtue of the
         * fact that we are still executing!)
         *
         * Wait ten seconds, then try again. This is to get S4/S5 to work on
         * all machines.
         *
         * We wait so long to allow chipsets that poll this reg very slowly
         * to still read the right value. Ideally, this block would go
         * away entirely.
         */
        AcpiOsStall (10 * ACPI_USEC_PER_SEC);

        Status = AcpiHwRegisterWrite (ACPI_REGISTER_PM1_CONTROL,
            SleepEnableRegInfo->AccessBitMask);
        if (ACPI_FAILURE (Status))
        {
            return_ACPI_STATUS (Status);
        }
    }

    /* Wait for transition back to Working State */

    do
    {
        Status = AcpiReadBitRegister (ACPI_BITREG_WAKE_STATUS, &InValue);
        if (ACPI_FAILURE (Status))
        {
            return_ACPI_STATUS (Status);
        }

    } while (!InValue);

    return_ACPI_STATUS (AE_OK);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiHwLegacyWakePrep
 *
 * PARAMETERS:  SleepState          - Which sleep state we just exited
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a
 *              sleep.
 *              Called with interrupts ENABLED.
 *
 ******************************************************************************/

ACPI_STATUS
AcpiHwLegacyWakePrep (
    UINT8                   SleepState)
{
    ACPI_STATUS             Status;
    ACPI_BIT_REGISTER_INFO  *SleepTypeRegInfo;
    ACPI_BIT_REGISTER_INFO  *SleepEnableRegInfo;
    UINT32                  Pm1aControl;
    UINT32                  Pm1bControl;


    ACPI_FUNCTION_TRACE (HwLegacyWakePrep);

    /*
     * Set SLP_TYPE and SLP_EN to state S0.
     * This is unclear from the ACPI Spec, but it is required
     * by some machines.
     */
    Status = AcpiGetSleepTypeData (ACPI_STATE_S0,
        &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB);
    if (ACPI_SUCCESS (Status))
    {
        SleepTypeRegInfo =
            AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE);
        SleepEnableRegInfo =
            AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE);

        /* Get current value of PM1A control */

        Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL,
            &Pm1aControl);
        if (ACPI_SUCCESS (Status))
        {
            /* Clear the SLP_EN and SLP_TYP fields */

            Pm1aControl &= ~(SleepTypeRegInfo->AccessBitMask |
                SleepEnableRegInfo->AccessBitMask);
            Pm1bControl = Pm1aControl;

            /* Insert the SLP_TYP bits */

            Pm1aControl |= (AcpiGbl_SleepTypeA <<
                SleepTypeRegInfo->BitPosition);
            Pm1bControl |= (AcpiGbl_SleepTypeB <<
                SleepTypeRegInfo->BitPosition);

            /* Write the control registers and ignore any errors */

            (void) AcpiHwWritePm1Control (Pm1aControl, Pm1bControl);
        }
    }

    return_ACPI_STATUS (Status);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiHwLegacyWake
 *
 * PARAMETERS:  SleepState          - Which sleep state we just exited
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
 *              Called with interrupts ENABLED.
 *
 ******************************************************************************/

ACPI_STATUS
AcpiHwLegacyWake (
    UINT8                   SleepState)
{
    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE (HwLegacyWake);


    /* Ensure EnterSleepStatePrep -> EnterSleepState ordering */

    AcpiGbl_SleepTypeA = ACPI_SLEEP_TYPE_INVALID;
    AcpiHwExecuteSleepMethod (METHOD_PATHNAME__SST, ACPI_SST_WAKING);

    /*
     * GPEs must be enabled before _WAK is called as GPEs
     * might get fired there
     *
     * Restore the GPEs:
     * 1) Disable/Clear all GPEs
     * 2) Enable all runtime GPEs
     */
    Status = AcpiHwDisableAllGpes ();
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    Status = AcpiHwEnableAllRuntimeGpes ();
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /*
     * Now we can execute _WAK, etc. Some machines require that the GPEs
     * are enabled before the wake methods are executed.
     */
    AcpiHwExecuteSleepMethod (METHOD_PATHNAME__WAK, SleepState);

    /*
     * Some BIOS code assumes that WAK_STS will be cleared on resume
     * and use it to determine whether the system is rebooting or
     * resuming. Clear WAK_STS for compatibility.
     */
    (void) AcpiWriteBitRegister (ACPI_BITREG_WAKE_STATUS,
        ACPI_CLEAR_STATUS);
    AcpiGbl_SystemAwakeAndRunning = TRUE;

    /* Enable power button */

    (void) AcpiWriteBitRegister(
            AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].EnableRegisterId,
            ACPI_ENABLE_EVENT);

    (void) AcpiWriteBitRegister(
            AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].StatusRegisterId,
            ACPI_CLEAR_STATUS);

    AcpiHwExecuteSleepMethod (METHOD_PATHNAME__SST, ACPI_SST_WORKING);
    return_ACPI_STATUS (Status);
}

#endif /* !ACPI_REDUCED_HARDWARE */
Revision:	12108
Committed:	Sun Oct 21 15:50:05 2018 UTC (5 years, 6 months ago) by laffer1
Content type:	text/plain
File size:	11142 byte(s)
Log Message:	ACPICA 20161222
#	Content
1	/* $MidnightBSD$ */
2	/******************************************************************************
3	*
4	* Name: hwsleep.c - ACPI Hardware Sleep/Wake Support functions for the
5	* original/legacy sleep/PM registers.
6	*
7	*****************************************************************************/
8
9	/*
10	* Copyright (C) 2000 - 2016, Intel Corp.
11	* All rights reserved.
12	*
13	* Redistribution and use in source and binary forms, with or without
14	* modification, are permitted provided that the following conditions
15	* are met:
16	* 1. Redistributions of source code must retain the above copyright
17	* notice, this list of conditions, and the following disclaimer,
18	* without modification.
19	* 2. Redistributions in binary form must reproduce at minimum a disclaimer
20	* substantially similar to the "NO WARRANTY" disclaimer below
21	* ("Disclaimer") and any redistribution must be conditioned upon
22	* including a substantially similar Disclaimer requirement for further
23	* binary redistribution.
24	* 3. Neither the names of the above-listed copyright holders nor the names
25	* of any contributors may be used to endorse or promote products derived
26	* from this software without specific prior written permission.
27	*
28	* Alternatively, this software may be distributed under the terms of the
29	* GNU General Public License ("GPL") version 2 as published by the Free
30	* Software Foundation.
31	*
32	* NO WARRANTY
33	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
34	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
35	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
36	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
37	* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
38	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
39	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
41	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
42	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
43	* POSSIBILITY OF SUCH DAMAGES.
44	*/
45
46	#include <contrib/dev/acpica/include/acpi.h>
47	#include <contrib/dev/acpica/include/accommon.h>
48
49	#define _COMPONENT ACPI_HARDWARE
50	ACPI_MODULE_NAME ("hwsleep")
51
52
53	#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
54	/*******************************************************************************
55	*
56	* FUNCTION: AcpiHwLegacySleep
57	*
58	* PARAMETERS: SleepState - Which sleep state to enter
59	*
60	* RETURN: Status
61	*
62	* DESCRIPTION: Enter a system sleep state via the legacy FADT PM registers
63	* THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
64	*
65	******************************************************************************/
66
67	ACPI_STATUS
68	AcpiHwLegacySleep (
69	UINT8 SleepState)
70	{
71	ACPI_BIT_REGISTER_INFO *SleepTypeRegInfo;
72	ACPI_BIT_REGISTER_INFO *SleepEnableRegInfo;
73	UINT32 Pm1aControl;
74	UINT32 Pm1bControl;
75	UINT32 InValue;
76	ACPI_STATUS Status;
77
78
79	ACPI_FUNCTION_TRACE (HwLegacySleep);
80
81
82	SleepTypeRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE);
83	SleepEnableRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE);
84
85	/* Clear wake status */
86
87	Status = AcpiWriteBitRegister (ACPI_BITREG_WAKE_STATUS,
88	ACPI_CLEAR_STATUS);
89	if (ACPI_FAILURE (Status))
90	{
91	return_ACPI_STATUS (Status);
92	}
93
94	/* Clear all fixed and general purpose status bits */
95
96	Status = AcpiHwClearAcpiStatus ();
97	if (ACPI_FAILURE (Status))
98	{
99	return_ACPI_STATUS (Status);
100	}
101
102	/*
103	* 1) Disable/Clear all GPEs
104	* 2) Enable all wakeup GPEs
105	*/
106	Status = AcpiHwDisableAllGpes ();
107	if (ACPI_FAILURE (Status))
108	{
109	return_ACPI_STATUS (Status);
110	}
111	AcpiGbl_SystemAwakeAndRunning = FALSE;
112
113	Status = AcpiHwEnableAllWakeupGpes ();
114	if (ACPI_FAILURE (Status))
115	{
116	return_ACPI_STATUS (Status);
117	}
118
119	/* Get current value of PM1A control */
120
121	Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL,
122	&Pm1aControl);
123	if (ACPI_FAILURE (Status))
124	{
125	return_ACPI_STATUS (Status);
126	}
127	ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
128	"Entering sleep state [S%u]\n", SleepState));
129
130	/* Clear the SLP_EN and SLP_TYP fields */
131
132	Pm1aControl &= ~(SleepTypeRegInfo->AccessBitMask \|
133	SleepEnableRegInfo->AccessBitMask);
134	Pm1bControl = Pm1aControl;
135
136	/* Insert the SLP_TYP bits */
137
138	Pm1aControl \|= (AcpiGbl_SleepTypeA << SleepTypeRegInfo->BitPosition);
139	Pm1bControl \|= (AcpiGbl_SleepTypeB << SleepTypeRegInfo->BitPosition);
140
141	/*
142	* We split the writes of SLP_TYP and SLP_EN to workaround
143	* poorly implemented hardware.
144	*/
145
146	/* Write #1: write the SLP_TYP data to the PM1 Control registers */
147
148	Status = AcpiHwWritePm1Control (Pm1aControl, Pm1bControl);
149	if (ACPI_FAILURE (Status))
150	{
151	return_ACPI_STATUS (Status);
152	}
153
154	/* Insert the sleep enable (SLP_EN) bit */
155
156	Pm1aControl \|= SleepEnableRegInfo->AccessBitMask;
157	Pm1bControl \|= SleepEnableRegInfo->AccessBitMask;
158
159	/* Flush caches, as per ACPI specification */
160
161	ACPI_FLUSH_CPU_CACHE ();
162
163	Status = AcpiOsEnterSleep (SleepState, Pm1aControl, Pm1bControl);
164	if (Status == AE_CTRL_TERMINATE)
165	{
166	return_ACPI_STATUS (AE_OK);
167	}
168	if (ACPI_FAILURE (Status))
169	{
170	return_ACPI_STATUS (Status);
171	}
172
173	/* Write #2: Write both SLP_TYP + SLP_EN */
174
175	Status = AcpiHwWritePm1Control (Pm1aControl, Pm1bControl);
176	if (ACPI_FAILURE (Status))
177	{
178	return_ACPI_STATUS (Status);
179	}
180
181	if (SleepState > ACPI_STATE_S3)
182	{
183	/*
184	* We wanted to sleep > S3, but it didn't happen (by virtue of the
185	* fact that we are still executing!)
186	*
187	* Wait ten seconds, then try again. This is to get S4/S5 to work on
188	* all machines.
189	*
190	* We wait so long to allow chipsets that poll this reg very slowly
191	* to still read the right value. Ideally, this block would go
192	* away entirely.
193	*/
194	AcpiOsStall (10 * ACPI_USEC_PER_SEC);
195
196	Status = AcpiHwRegisterWrite (ACPI_REGISTER_PM1_CONTROL,
197	SleepEnableRegInfo->AccessBitMask);
198	if (ACPI_FAILURE (Status))
199	{
200	return_ACPI_STATUS (Status);
201	}
202	}
203
204	/* Wait for transition back to Working State */
205
206	do
207	{
208	Status = AcpiReadBitRegister (ACPI_BITREG_WAKE_STATUS, &InValue);
209	if (ACPI_FAILURE (Status))
210	{
211	return_ACPI_STATUS (Status);
212	}
213
214	} while (!InValue);
215
216	return_ACPI_STATUS (AE_OK);
217	}
218
219
220	/*******************************************************************************
221	*
222	* FUNCTION: AcpiHwLegacyWakePrep
223	*
224	* PARAMETERS: SleepState - Which sleep state we just exited
225	*
226	* RETURN: Status
227	*
228	* DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a
229	* sleep.
230	* Called with interrupts ENABLED.
231	*
232	******************************************************************************/
233
234	ACPI_STATUS
235	AcpiHwLegacyWakePrep (
236	UINT8 SleepState)
237	{
238	ACPI_STATUS Status;
239	ACPI_BIT_REGISTER_INFO *SleepTypeRegInfo;
240	ACPI_BIT_REGISTER_INFO *SleepEnableRegInfo;
241	UINT32 Pm1aControl;
242	UINT32 Pm1bControl;
243
244
245	ACPI_FUNCTION_TRACE (HwLegacyWakePrep);
246
247	/*
248	* Set SLP_TYPE and SLP_EN to state S0.
249	* This is unclear from the ACPI Spec, but it is required
250	* by some machines.
251	*/
252	Status = AcpiGetSleepTypeData (ACPI_STATE_S0,
253	&AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB);
254	if (ACPI_SUCCESS (Status))
255	{
256	SleepTypeRegInfo =
257	AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE);
258	SleepEnableRegInfo =
259	AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE);
260
261	/* Get current value of PM1A control */
262
263	Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_CONTROL,
264	&Pm1aControl);
265	if (ACPI_SUCCESS (Status))
266	{
267	/* Clear the SLP_EN and SLP_TYP fields */
268
269	Pm1aControl &= ~(SleepTypeRegInfo->AccessBitMask \|
270	SleepEnableRegInfo->AccessBitMask);
271	Pm1bControl = Pm1aControl;
272
273	/* Insert the SLP_TYP bits */
274
275	Pm1aControl \|= (AcpiGbl_SleepTypeA <<
276	SleepTypeRegInfo->BitPosition);
277	Pm1bControl \|= (AcpiGbl_SleepTypeB <<
278	SleepTypeRegInfo->BitPosition);
279
280	/* Write the control registers and ignore any errors */
281
282	(void) AcpiHwWritePm1Control (Pm1aControl, Pm1bControl);
283	}
284	}
285
286	return_ACPI_STATUS (Status);
287	}
288
289
290	/*******************************************************************************
291	*
292	* FUNCTION: AcpiHwLegacyWake
293	*
294	* PARAMETERS: SleepState - Which sleep state we just exited
295	*
296	* RETURN: Status
297	*
298	* DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
299	* Called with interrupts ENABLED.
300	*
301	******************************************************************************/
302
303	ACPI_STATUS
304	AcpiHwLegacyWake (
305	UINT8 SleepState)
306	{
307	ACPI_STATUS Status;
308
309
310	ACPI_FUNCTION_TRACE (HwLegacyWake);
311
312
313	/* Ensure EnterSleepStatePrep -> EnterSleepState ordering */
314
315	AcpiGbl_SleepTypeA = ACPI_SLEEP_TYPE_INVALID;
316	AcpiHwExecuteSleepMethod (METHOD_PATHNAME__SST, ACPI_SST_WAKING);
317
318	/*
319	* GPEs must be enabled before _WAK is called as GPEs
320	* might get fired there
321	*
322	* Restore the GPEs:
323	* 1) Disable/Clear all GPEs
324	* 2) Enable all runtime GPEs
325	*/
326	Status = AcpiHwDisableAllGpes ();
327	if (ACPI_FAILURE (Status))
328	{
329	return_ACPI_STATUS (Status);
330	}
331
332	Status = AcpiHwEnableAllRuntimeGpes ();
333	if (ACPI_FAILURE (Status))
334	{
335	return_ACPI_STATUS (Status);
336	}
337
338	/*
339	* Now we can execute _WAK, etc. Some machines require that the GPEs
340	* are enabled before the wake methods are executed.
341	*/
342	AcpiHwExecuteSleepMethod (METHOD_PATHNAME__WAK, SleepState);
343
344	/*
345	* Some BIOS code assumes that WAK_STS will be cleared on resume
346	* and use it to determine whether the system is rebooting or
347	* resuming. Clear WAK_STS for compatibility.
348	*/
349	(void) AcpiWriteBitRegister (ACPI_BITREG_WAKE_STATUS,
350	ACPI_CLEAR_STATUS);
351	AcpiGbl_SystemAwakeAndRunning = TRUE;
352
353	/* Enable power button */
354
355	(void) AcpiWriteBitRegister(
356	AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].EnableRegisterId,
357	ACPI_ENABLE_EVENT);
358
359	(void) AcpiWriteBitRegister(
360	AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].StatusRegisterId,
361	ACPI_CLEAR_STATUS);
362
363	AcpiHwExecuteSleepMethod (METHOD_PATHNAME__SST, ACPI_SST_WORKING);
364	return_ACPI_STATUS (Status);
365	}
366
367	#endif /* !ACPI_REDUCED_HARDWARE */
Name	Value
svn:eol-style	native
svn:keywords	MidnightBSD=%H
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