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aclinuxex.h revision 1.1.1.10 
      1 /******************************************************************************
      2  *
      3  * Name: aclinuxex.h - Extra OS specific defines, etc. for Linux
      4  *
      5  *****************************************************************************/
      6 
      7 /*
      8  * Copyright (C) 2000 - 2022, 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 MERCHANTABILITY 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 ACPI_INIT_FUNCTION 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 static inline ACPI_STATUS
    148 AcpiOsInitializeDebugger (
    149     void)
    150 {
    151     return AE_OK;
    152 }
    153 
    154 static inline void
    155 AcpiOsTerminateDebugger (
    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