1/******************************************************************************
2 *
3 * Name: aclinuxex.h - Extra OS specific defines, etc. for Linux
4 *
5 *****************************************************************************/
6
7/******************************************************************************
8 *
9 * 1. Copyright Notice
10 *
11 * Some or all of this work - Copyright (c) 1999 - 2016, Intel Corp.
12 * All rights reserved.
13 *
14 * 2. License
15 *
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights. You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
19 * property rights.
20 *
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
27 *
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code. No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
36 *
37 * The above copyright and patent license is granted only if the following
38 * conditions are met:
39 *
40 * 3. Conditions
41 *
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision. In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change. Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee. Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
53 *
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution. In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
64 * make.
65 *
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
70 * distribution.
71 *
72 * 3.4. Intel retains all right, title, and interest in and to the Original
73 * Intel Code.
74 *
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
79 *
80 * 4. Disclaimer and Export Compliance
81 *
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88 * PARTICULAR PURPOSE.
89 *
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97 * LIMITED REMEDY.
98 *
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government. In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
113 *
114 *****************************************************************************/
115
116#ifndef __ACLINUXEX_H__
117#define __ACLINUXEX_H__
118
119#ifdef __KERNEL__
120
121#ifndef ACPI_USE_NATIVE_DIVIDE
122
123#ifndef ACPI_DIV_64_BY_32
124#define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \
125    do { \
126        UINT64 (__n) = ((UINT64) n_hi) << 32 | (n_lo); \
127        (r32) = do_div ((__n), (d32)); \
128        (q32) = (UINT32) (__n); \
129    } while (0)
130#endif
131
132#ifndef ACPI_SHIFT_RIGHT_64
133#define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \
134    do { \
135        (n_lo) >>= 1; \
136        (n_lo) |= (((n_hi) & 1) << 31); \
137        (n_hi) >>= 1; \
138    } while (0)
139#endif
140
141#endif
142
143/*
144 * Overrides for in-kernel ACPICA
145 */
146ACPI_STATUS ACPI_INIT_FUNCTION AcpiOsInitialize (
147    void);
148
149ACPI_STATUS AcpiOsTerminate (
150    void);
151
152/*
153 * The irqs_disabled() check is for resume from RAM.
154 * Interrupts are off during resume, just like they are for boot.
155 * However, boot has  (system_state != SYSTEM_RUNNING)
156 * to quiet __might_sleep() in kmalloc() and resume does not.
157 */
158static inline void *
159AcpiOsAllocate (
160    ACPI_SIZE               Size)
161{
162    return kmalloc (Size, irqs_disabled () ? GFP_ATOMIC : GFP_KERNEL);
163}
164
165static inline void *
166AcpiOsAllocateZeroed (
167    ACPI_SIZE               Size)
168{
169    return kzalloc (Size, irqs_disabled () ? GFP_ATOMIC : GFP_KERNEL);
170}
171
172static inline void
173AcpiOsFree (
174    void                   *Memory)
175{
176    kfree (Memory);
177}
178
179static inline void *
180AcpiOsAcquireObject (
181    ACPI_CACHE_T           *Cache)
182{
183    return kmem_cache_zalloc (Cache,
184        irqs_disabled () ? GFP_ATOMIC : GFP_KERNEL);
185}
186
187static inline ACPI_THREAD_ID
188AcpiOsGetThreadId (
189    void)
190{
191    return (ACPI_THREAD_ID) (unsigned long) current;
192}
193
194/*
195 * When lockdep is enabled, the spin_lock_init() macro stringifies it's
196 * argument and uses that as a name for the lock in debugging.
197 * By executing spin_lock_init() in a macro the key changes from "lock" for
198 * all locks to the name of the argument of acpi_os_create_lock(), which
199 * prevents lockdep from reporting false positives for ACPICA locks.
200 */
201#define AcpiOsCreateLock(__Handle) \
202    ({ \
203        spinlock_t *Lock = ACPI_ALLOCATE(sizeof(*Lock)); \
204        if (Lock) { \
205            *(__Handle) = Lock; \
206            spin_lock_init(*(__Handle)); \
207        } \
208        Lock ? AE_OK : AE_NO_MEMORY; \
209    })
210
211static inline BOOLEAN
212AcpiOsReadable (
213    void                    *Pointer,
214    ACPI_SIZE               Length)
215{
216    return TRUE;
217}
218
219
220/*
221 * OSL interfaces added by Linux
222 */
223void
224EarlyAcpiOsUnmapMemory (
225    void __iomem            *Virt,
226    ACPI_SIZE               Size);
227
228#endif /* __KERNEL__ */
229
230#endif /* __ACLINUXEX_H__ */
231