include/acpi/platform/aclinux.h

   1 /******************************************************************************
   2  *
   3  * Name: aclinux.h - OS specific defines, etc. for Linux
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2013, 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 __ACLINUX_H__
  45 #define __ACLINUX_H__
  46
  47 /* Common (in-kernel/user-space) ACPICA configuration */
  48
  49 #define ACPI_USE_SYSTEM_CLIBRARY
  50 #define ACPI_USE_DO_WHILE_0
  51 #define ACPI_MUTEX_TYPE             ACPI_BINARY_SEMAPHORE
  52
  53
  54 #ifdef __KERNEL__
  55
  56 #include <linux/string.h>
  57 #include <linux/kernel.h>
  58 #include <linux/ctype.h>
  59 #include <linux/sched.h>
  60 #include <linux/atomic.h>
  61 #include <asm/div64.h>
  62 #include <asm/acpi.h>
  63 #include <linux/slab.h>
  64 #include <linux/spinlock_types.h>
  65 #include <asm/current.h>
  66
  67 /* Host-dependent types and defines for in-kernel ACPICA */
  68
  69 #define ACPI_MACHINE_WIDTH          BITS_PER_LONG
  70 #define ACPI_EXPORT_SYMBOL(symbol)  EXPORT_SYMBOL(symbol);
  71 #define strtoul                     simple_strtoul
  72
  73 #define acpi_cache_t                        struct kmem_cache
  74 #define acpi_spinlock                       spinlock_t *
  75 #define acpi_cpu_flags                      unsigned long
  76
  77 #else /* !__KERNEL__ */
  78
  79 #include <stdarg.h>
  80 #include <string.h>
  81 #include <stdlib.h>
  82 #include <ctype.h>
  83 #include <unistd.h>
  84
  85 /* Host-dependent types and defines for user-space ACPICA */
  86
  87 #define ACPI_FLUSH_CPU_CACHE()
  88 #define ACPI_CAST_PTHREAD_T(pthread) ((acpi_thread_id) (pthread))
  89
  90 #if defined(__ia64__) || defined(__x86_64__)
  91 #define ACPI_MACHINE_WIDTH          64
  92 #define COMPILER_DEPENDENT_INT64    long
  93 #define COMPILER_DEPENDENT_UINT64   unsigned long
  94 #else
  95 #define ACPI_MACHINE_WIDTH          32
  96 #define COMPILER_DEPENDENT_INT64    long long
  97 #define COMPILER_DEPENDENT_UINT64   unsigned long long
  98 #define ACPI_USE_NATIVE_DIVIDE
  99 #endif
 100
 101 #ifndef __cdecl
 102 #define __cdecl
 103 #endif
 104
 105 #endif /* __KERNEL__ */
 106
 107 /* Linux uses GCC */
 108
 109 #include <acpi/platform/acgcc.h>
 110
 111 #ifdef __KERNEL__
 112 #include <acpi/actypes.h>
 113 /*
 114  * Overrides for in-kernel ACPICA
 115  */
 116 static inline acpi_thread_id acpi_os_get_thread_id(void)
 117 {
 118         return (acpi_thread_id)(unsigned long)current;
 119 }
 120
 121 /*
 122  * The irqs_disabled() check is for resume from RAM.
 123  * Interrupts are off during resume, just like they are for boot.
 124  * However, boot has  (system_state != SYSTEM_RUNNING)
 125  * to quiet __might_sleep() in kmalloc() and resume does not.
 126  */
 127 static inline void *acpi_os_allocate(acpi_size size)
 128 {
 129         return kmalloc(size, irqs_disabled() ? GFP_ATOMIC : GFP_KERNEL);
 130 }
 131
 132 static inline void *acpi_os_allocate_zeroed(acpi_size size)
 133 {
 134         return kzalloc(size, irqs_disabled() ? GFP_ATOMIC : GFP_KERNEL);
 135 }
 136
 137 static inline void *acpi_os_acquire_object(acpi_cache_t * cache)
 138 {
 139         return kmem_cache_zalloc(cache,
 140                 irqs_disabled() ? GFP_ATOMIC : GFP_KERNEL);
 141 }
 142
 143 #define ACPI_ALLOCATE(a)        acpi_os_allocate(a)
 144 #define ACPI_ALLOCATE_ZEROED(a) acpi_os_allocate_zeroed(a)
 145 #define ACPI_FREE(a)            kfree(a)
 146
 147 #ifndef CONFIG_PREEMPT
 148 /*
 149  * Used within ACPICA to show where it is safe to preempt execution
 150  * when CONFIG_PREEMPT=n
 151  */
 152 #define ACPI_PREEMPTION_POINT() \
 153         do { \
 154                 if (!irqs_disabled()) \
 155                         cond_resched(); \
 156         } while (0)
 157 #endif
 158
 159 /*
 160  * When lockdep is enabled, the spin_lock_init() macro stringifies it's
 161  * argument and uses that as a name for the lock in debugging.
 162  * By executing spin_lock_init() in a macro the key changes from "lock" for
 163  * all locks to the name of the argument of acpi_os_create_lock(), which
 164  * prevents lockdep from reporting false positives for ACPICA locks.
 165  */
 166 #define acpi_os_create_lock(__handle)                           \
 167 ({                                                              \
 168         spinlock_t *lock = ACPI_ALLOCATE(sizeof(*lock));        \
 169                                                                 \
 170         if (lock) {                                             \
 171                 *(__handle) = lock;                             \
 172                 spin_lock_init(*(__handle));                    \
 173         }                                                       \
 174         lock ? AE_OK : AE_NO_MEMORY;                            \
 175 })
 176
 177 #endif /* __KERNEL__ */
 178
 179 #endif /* __ACLINUX_H__ */