reactos/drivers/bus/acpi/acpica/include/platform/acgcc.h

   1 /******************************************************************************
   2  *
   3  * Name: acgcc.h - GCC specific defines, etc.
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2017, 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 __ACGCC_H__
  45 #define __ACGCC_H__
  46
  47 /*
  48  * Use compiler specific <stdarg.h> is a good practice for even when
  49  * -nostdinc is specified (i.e., ACPI_USE_STANDARD_HEADERS undefined.
  50  */
  51 #ifndef va_arg
  52 #ifdef ACPI_USE_BUILTIN_STDARG
  53 typedef __builtin_va_list       va_list;
  54 #define va_start(v, l)          __builtin_va_start(v, l)
  55 #define va_end(v)               __builtin_va_end(v)
  56 #define va_arg(v, l)            __builtin_va_arg(v, l)
  57 #define va_copy(d, s)           __builtin_va_copy(d, s)
  58 #else
  59 #include <stdarg.h>
  60 #endif
  61 #endif
  62
  63 #define ACPI_INLINE             __inline__
  64
  65 /* Function name is used for debug output. Non-ANSI, compiler-dependent */
  66
  67 #define ACPI_GET_FUNCTION_NAME          __func__
  68
  69 /*
  70  * This macro is used to tag functions as "printf-like" because
  71  * some compilers (like GCC) can catch printf format string problems.
  72  */
  73 #define ACPI_PRINTF_LIKE(c) __attribute__ ((__format__ (__printf__, c, c+1)))
  74
  75 /*
  76  * Some compilers complain about unused variables. Sometimes we don't want to
  77  * use all the variables (for example, _AcpiModuleName). This allows us
  78  * to tell the compiler warning in a per-variable manner that a variable
  79  * is unused.
  80  */
  81 #define ACPI_UNUSED_VAR __attribute__ ((unused))
  82
  83 /* GCC supports __VA_ARGS__ in macros */
  84
  85 #define COMPILER_VA_MACRO               1
  86
  87
  88 #ifdef __REACTOS__
  89 /* Flush CPU cache - used when going to sleep. Wbinvd or similar. */
  90
  91 #ifdef ACPI_APPLICATION
  92 #define ACPI_FLUSH_CPU_CACHE()
  93 #else
  94 #define ACPI_FLUSH_CPU_CACHE()  asm ("WBINVD")
  95 #endif
  96
  97 /*
  98  * Global Lock acquire/release code
  99  *
 100  * Note: Handles case where the FACS pointer is null
 101  */
 102 #define ACPI_ACQUIRE_GLOBAL_LOCK(FacsPtr, Acq)              \
 103 do {                                                        \
 104     asm("orl    %2,%2;"                                     \
 105         "jz     2f;"                                        \
 106         "leal   16(%2),%2;"                                 \
 107         "1:"                                                \
 108         "movl   (%2),%%eax;"                                \
 109         "movl   %%eax,%%edx;"                               \
 110         "andl   %3,%%edx;"                                  \
 111         "btsl   $0x1,%%edx;"                                \
 112         "adcl   $0x0,%%edx;"                                \
 113         "lock;  cmpxchgl %%edx,(%2);"                       \
 114         "jnz    1b;"                                        \
 115         "cmpb   $0x3,%%dl;"                                 \
 116         "sbbl   %%eax,%%eax;"                               \
 117         "2:"                                                \
 118         :"=a"(Acq):"a"(0xFF),"c"(FacsPtr),"i"(~1L):"edx");\
 119 } while(0)
 120
 121 #define ACPI_RELEASE_GLOBAL_LOCK(FacsPtr, Acq)              \
 122 do {                                                        \
 123     asm("orl    %2,%2;"                                     \
 124         "jz     2f;"                                        \
 125         "leal   16(%2),%2;"                                 \
 126         "1:"                                                \
 127         "movl  (%2),%%eax;"                                 \
 128         "movl   %%eax,%%edx;"                               \
 129         "andl   %3,%%edx;"                                  \
 130         "lock;  cmpxchgl %%edx,(%2);"                       \
 131         "jnz    1b;"                                        \
 132         "cmpb   $0x3,%%dl;" /* FIXME: this is pointless */  \
 133         "andl   $0x1,%%eax;"                                \
 134         "2:"                                                \
 135         :"=a"(Acq):"a"(0),"c"(FacsPtr),"i"(~3L):"edx");\
 136 } while(0)
 137
 138
 139 #define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32)                \
 140 {                                                                   \
 141     asm("divl %4;"                                                  \
 142         :"=a"(q32),"=d"(r32):"a"(n_lo),"d"(n_hi),"rm"(d32):"cc");   \
 143 }
 144
 145 #define ACPI_SHIFT_RIGHT_64(n_hi, n_lo)                     \
 146 {                                                           \
 147     asm("shrl $1, %0;"                                      \
 148         "rcrl $1, %1;"                                      \
 149         :"=rm"(n_hi),"=rm"(n_lo):"0"(n_hi),"1"(n_lo):"cc"); \
 150 }
 151
 152 #endif /* __REACTOS__ */
 153 #endif /* __ACGCC_H__ */