1/******************************************************************************
2 *
3 * Name: aclinuxex.h - Extra OS specific defines, etc. for Linux
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2019, 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#ifndef ACPI_USE_NATIVE_DIVIDE
50
51#ifndef ACPI_DIV_64_BY_32
52#define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \
53 do { \
54 UINT64 (__n) = ((UINT64) n_hi) << 32 | (n_lo); \
55 (r32) = do_div ((__n), (d32)); \
56 (q32) = (UINT32) (__n); \
57 } while (0)
58#endif
59
60#ifndef ACPI_SHIFT_RIGHT_64
61#define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \
62 do { \
63 (n_lo) >>= 1; \
64 (n_lo) |= (((n_hi) & 1) << 31); \
65 (n_hi) >>= 1; \
66 } while (0)
67#endif
68
69#endif
70
71/*
72 * Overrides for in-kernel ACPICA
73 */
74ACPI_STATUS ACPI_INIT_FUNCTION AcpiOsInitialize (
75 void);
76
77ACPI_STATUS AcpiOsTerminate (
78 void);
79
80/*
81 * The irqs_disabled() check is for resume from RAM.
82 * Interrupts are off during resume, just like they are for boot.
83 * However, boot has (system_state != SYSTEM_RUNNING)
84 * to quiet __might_sleep() in kmalloc() and resume does not.
85 */
86static inline void *
87AcpiOsAllocate (
88 ACPI_SIZE Size)
89{
90 return kmalloc (Size, irqs_disabled () ? GFP_ATOMIC : GFP_KERNEL);
91}
92
93static inline void *
94AcpiOsAllocateZeroed (
95 ACPI_SIZE Size)
96{
97 return kzalloc (Size, irqs_disabled () ? GFP_ATOMIC : GFP_KERNEL);
98}
99
100static inline void
101AcpiOsFree (
102 void *Memory)
103{
104 kfree (Memory);
105}
106
107static inline void *
108AcpiOsAcquireObject (
109 ACPI_CACHE_T *Cache)
110{
111 return kmem_cache_zalloc (Cache,
112 irqs_disabled () ? GFP_ATOMIC : GFP_KERNEL);
113}
114
115static inline ACPI_THREAD_ID
116AcpiOsGetThreadId (
117 void)
118{
119 return (ACPI_THREAD_ID) (unsigned long) current;
120}
121
122/*
123 * When lockdep is enabled, the spin_lock_init() macro stringifies it's
124 * argument and uses that as a name for the lock in debugging.
125 * By executing spin_lock_init() in a macro the key changes from "lock" for
126 * all locks to the name of the argument of acpi_os_create_lock(), which
127 * prevents lockdep from reporting false positives for ACPICA locks.
128 */
129#define AcpiOsCreateLock(__Handle) \
130 ({ \
131 spinlock_t *Lock = ACPI_ALLOCATE(sizeof(*Lock)); \
132 if (Lock) { \
133 *(__Handle) = Lock; \
134 spin_lock_init(*(__Handle)); \
135 } \
136 Lock ? AE_OK : AE_NO_MEMORY; \
137 })
138
139static inline BOOLEAN
140AcpiOsReadable (
141 void *Pointer,
142 ACPI_SIZE Length)
143{
144 return TRUE;
145}
146
147static inline ACPI_STATUS
148AcpiOsInitializeDebugger (
149 void)
150{
151 return AE_OK;
152}
153
154static inline void
155AcpiOsTerminateDebugger (
156 void)
157{
158 return;
159}
160
161
162/*
163 * OSL interfaces added by Linux
164 */
165
166#endif /* __KERNEL__ */
167
168#endif /* __ACLINUXEX_H__ */
169