1 /******************************************************************************
2  *
3  * Name: aclinuxex.h - Extra OS specific defines, etc. for Linux
4  *
5  *****************************************************************************/
6 
7 /*
8  * Copyright (C) 2000 - 2014, 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 #ifndef __ACLINUXEX_H__
45 #define __ACLINUXEX_H__
46 
47 #ifdef __KERNEL__
48 
49 /*
50  * Overrides for in-kernel ACPICA
51  */
52 acpi_status __init acpi_os_initialize(void);
53 
54 acpi_status acpi_os_terminate(void);
55 
56 /*
57  * The irqs_disabled() check is for resume from RAM.
58  * Interrupts are off during resume, just like they are for boot.
59  * However, boot has  (system_state != SYSTEM_RUNNING)
60  * to quiet __might_sleep() in kmalloc() and resume does not.
61  */
62 static inline void *acpi_os_allocate(acpi_size size)
63 {
64 	return kmalloc(size, irqs_disabled()? GFP_ATOMIC : GFP_KERNEL);
65 }
66 
67 static inline void *acpi_os_allocate_zeroed(acpi_size size)
68 {
69 	return kzalloc(size, irqs_disabled()? GFP_ATOMIC : GFP_KERNEL);
70 }
71 
72 static inline void acpi_os_free(void *memory)
73 {
74 	kfree(memory);
75 }
76 
77 static inline void *acpi_os_acquire_object(acpi_cache_t * cache)
78 {
79 	return kmem_cache_zalloc(cache,
80 				 irqs_disabled()? GFP_ATOMIC : GFP_KERNEL);
81 }
82 
83 static inline acpi_thread_id acpi_os_get_thread_id(void)
84 {
85 	return (acpi_thread_id) (unsigned long)current;
86 }
87 
88 /*
89  * When lockdep is enabled, the spin_lock_init() macro stringifies it's
90  * argument and uses that as a name for the lock in debugging.
91  * By executing spin_lock_init() in a macro the key changes from "lock" for
92  * all locks to the name of the argument of acpi_os_create_lock(), which
93  * prevents lockdep from reporting false positives for ACPICA locks.
94  */
95 #define acpi_os_create_lock(__handle) \
96 	({ \
97 		spinlock_t *lock = ACPI_ALLOCATE(sizeof(*lock)); \
98 		if (lock) { \
99 			*(__handle) = lock; \
100 			spin_lock_init(*(__handle)); \
101 		} \
102 		lock ? AE_OK : AE_NO_MEMORY; \
103 	})
104 
105 /*
106  * OSL interfaces added by Linux
107  */
108 void early_acpi_os_unmap_memory(void __iomem * virt, acpi_size size);
109 
110 #endif				/* __KERNEL__ */
111 
112 #endif				/* __ACLINUXEX_H__ */
113