arch/x86/include/sys/acpi/platform/aclinuxex.h

   1 /******************************************************************************
   2  *
   3  * Name: aclinuxex.h - Extra OS specific defines, etc. for Linux
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2016, 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  */
  74 ACPI_STATUS __init AcpiOsInitialize (
  75     void);
  76
  77 ACPI_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  */
  86 static inline void *
  87 AcpiOsAllocate (
  88     ACPI_SIZE               Size)
  89 {
  90     return kmalloc (Size, irqs_disabled () ? GFP_ATOMIC : GFP_KERNEL);
  91 }
  92
  93 static inline void *
  94 AcpiOsAllocateZeroed (
  95     ACPI_SIZE               Size)
  96 {
  97     return kzalloc (Size, irqs_disabled () ? GFP_ATOMIC : GFP_KERNEL);
  98 }
  99
 100 static inline void
 101 AcpiOsFree (
 102     void                   *Memory)
 103 {
 104     kfree (Memory);
 105 }
 106
 107 static inline void *
 108 AcpiOsAcquireObject (
 109     ACPI_CACHE_T           *Cache)
 110 {
 111     return kmem_cache_zalloc (Cache,
 112         irqs_disabled () ? GFP_ATOMIC : GFP_KERNEL);
 113 }
 114
 115 static inline ACPI_THREAD_ID
 116 AcpiOsGetThreadId (
 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
 139 static inline BOOLEAN
 140 AcpiOsReadable (
 141     void                    *Pointer,
 142     ACPI_SIZE               Length)
 143 {
 144     return TRUE;
 145 }
 146
 147
 148 /*
 149  * OSL interfaces added by Linux
 150  */
 151 void
 152 EarlyAcpiOsUnmapMemory (
 153     void __iomem            *Virt,
 154     ACPI_SIZE               Size);
 155
 156 #endif /* __KERNEL__ */
 157
 158 #endif /* __ACLINUXEX_H__ */