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  *
   9  * 1. Copyright Notice
  10  *
  11  * Some or all of this work - Copyright (c) 1999 - 2018, 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  * Alternatively, you may choose to be licensed under the terms of the
 117  * following license:
 118  *
 119  * Redistribution and use in source and binary forms, with or without
 120  * modification, are permitted provided that the following conditions
 121  * are met:
 122  * 1. Redistributions of source code must retain the above copyright
 123  *    notice, this list of conditions, and the following disclaimer,
 124  *    without modification.
 125  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 126  *    substantially similar to the "NO WARRANTY" disclaimer below
 127  *    ("Disclaimer") and any redistribution must be conditioned upon
 128  *    including a substantially similar Disclaimer requirement for further
 129  *    binary redistribution.
 130  * 3. Neither the names of the above-listed copyright holders nor the names
 131  *    of any contributors may be used to endorse or promote products derived
 132  *    from this software without specific prior written permission.
 133  *
 134  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 135  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 136  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 137  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 138  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 139  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 140  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 141  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 142  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 143  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 144  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 145  *
 146  * Alternatively, you may choose to be licensed under the terms of the
 147  * GNU General Public License ("GPL") version 2 as published by the Free
 148  * Software Foundation.
 149  *
 150  *****************************************************************************/
 151
 152 #ifndef __ACLINUXEX_H__
 153 #define __ACLINUXEX_H__
 154
 155 #ifdef __KERNEL__
 156
 157 #ifndef ACPI_USE_NATIVE_DIVIDE
 158
 159 #ifndef ACPI_DIV_64_BY_32
 160 #define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \
 161     do { \
 162         UINT64 (__n) = ((UINT64) n_hi) << 32 | (n_lo); \
 163         (r32) = do_div ((__n), (d32)); \
 164         (q32) = (UINT32) (__n); \
 165     } while (0)
 166 #endif
 167
 168 #ifndef ACPI_SHIFT_RIGHT_64
 169 #define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \
 170     do { \
 171         (n_lo) >>= 1; \
 172         (n_lo) |= (((n_hi) & 1) << 31); \
 173         (n_hi) >>= 1; \
 174     } while (0)
 175 #endif
 176
 177 #endif
 178
 179 /*
 180  * Overrides for in-kernel ACPICA
 181  */
 182 ACPI_STATUS ACPI_INIT_FUNCTION AcpiOsInitialize (
 183     void);
 184
 185 ACPI_STATUS AcpiOsTerminate (
 186     void);
 187
 188 /*
 189  * The irqs_disabled() check is for resume from RAM.
 190  * Interrupts are off during resume, just like they are for boot.
 191  * However, boot has  (system_state != SYSTEM_RUNNING)
 192  * to quiet __might_sleep() in kmalloc() and resume does not.
 193  */
 194 static inline void *
 195 AcpiOsAllocate (
 196     ACPI_SIZE               Size)
 197 {
 198     return kmalloc (Size, irqs_disabled () ? GFP_ATOMIC : GFP_KERNEL);
 199 }
 200
 201 static inline void *
 202 AcpiOsAllocateZeroed (
 203     ACPI_SIZE               Size)
 204 {
 205     return kzalloc (Size, irqs_disabled () ? GFP_ATOMIC : GFP_KERNEL);
 206 }
 207
 208 static inline void
 209 AcpiOsFree (
 210     void                   *Memory)
 211 {
 212     kfree (Memory);
 213 }
 214
 215 static inline void *
 216 AcpiOsAcquireObject (
 217     ACPI_CACHE_T           *Cache)
 218 {
 219     return kmem_cache_zalloc (Cache,
 220         irqs_disabled () ? GFP_ATOMIC : GFP_KERNEL);
 221 }
 222
 223 static inline ACPI_THREAD_ID
 224 AcpiOsGetThreadId (
 225     void)
 226 {
 227     return (ACPI_THREAD_ID) (unsigned long) current;
 228 }
 229
 230 /*
 231  * When lockdep is enabled, the spin_lock_init() macro stringifies it's
 232  * argument and uses that as a name for the lock in debugging.
 233  * By executing spin_lock_init() in a macro the key changes from "lock" for
 234  * all locks to the name of the argument of acpi_os_create_lock(), which
 235  * prevents lockdep from reporting false positives for ACPICA locks.
 236  */
 237 #define AcpiOsCreateLock(__Handle) \
 238     ({ \
 239         spinlock_t *Lock = ACPI_ALLOCATE(sizeof(*Lock)); \
 240         if (Lock) { \
 241             *(__Handle) = Lock; \
 242             spin_lock_init(*(__Handle)); \
 243         } \
 244         Lock ? AE_OK : AE_NO_MEMORY; \
 245     })
 246
 247 static inline BOOLEAN
 248 AcpiOsReadable (
 249     void                    *Pointer,
 250     ACPI_SIZE               Length)
 251 {
 252     return TRUE;
 253 }
 254
 255 static inline ACPI_STATUS
 256 AcpiOsInitializeDebugger (
 257     void)
 258 {
 259     return AE_OK;
 260 }
 261
 262 static inline void
 263 AcpiOsTerminateDebugger (
 264     void)
 265 {
 266     return;
 267 }
 268
 269
 270 /*
 271  * OSL interfaces added by Linux
 272  */
 273
 274 #endif /* __KERNEL__ */
 275
 276 #endif /* __ACLINUXEX_H__ */