drivers/acpi/acpica/acmacros.h

   1 /******************************************************************************
   2  *
   3  * Name: acmacros.h - C macros for the entire subsystem.
   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 __ACMACROS_H__
  45 #define __ACMACROS_H__
  46
  47 /*
  48  * Extract data using a pointer. Any more than a byte and we
  49  * get into potential alignment issues -- see the STORE macros below.
  50  * Use with care.
  51  */
  52 #define ACPI_CAST8(ptr)                 ACPI_CAST_PTR (u8, (ptr))
  53 #define ACPI_CAST16(ptr)                ACPI_CAST_PTR (u16, (ptr))
  54 #define ACPI_CAST32(ptr)                ACPI_CAST_PTR (u32, (ptr))
  55 #define ACPI_CAST64(ptr)                ACPI_CAST_PTR (u64, (ptr))
  56 #define ACPI_GET8(ptr)                  (*ACPI_CAST8 (ptr))
  57 #define ACPI_GET16(ptr)                 (*ACPI_CAST16 (ptr))
  58 #define ACPI_GET32(ptr)                 (*ACPI_CAST32 (ptr))
  59 #define ACPI_GET64(ptr)                 (*ACPI_CAST64 (ptr))
  60 #define ACPI_SET8(ptr, val)             (*ACPI_CAST8 (ptr) = (u8) (val))
  61 #define ACPI_SET16(ptr, val)            (*ACPI_CAST16 (ptr) = (u16) (val))
  62 #define ACPI_SET32(ptr, val)            (*ACPI_CAST32 (ptr) = (u32) (val))
  63 #define ACPI_SET64(ptr, val)            (*ACPI_CAST64 (ptr) = (u64) (val))
  64
  65 /*
  66  * printf() format helper. This macro is a workaround for the difficulties
  67  * with emitting 64-bit integers and 64-bit pointers with the same code
  68  * for both 32-bit and 64-bit hosts.
  69  */
  70 #define ACPI_FORMAT_UINT64(i)           ACPI_HIDWORD(i), ACPI_LODWORD(i)
  71
  72 /*
  73  * Macros for moving data around to/from buffers that are possibly unaligned.
  74  * If the hardware supports the transfer of unaligned data, just do the store.
  75  * Otherwise, we have to move one byte at a time.
  76  */
  77 #ifdef ACPI_BIG_ENDIAN
  78 /*
  79  * Macros for big-endian machines
  80  */
  81
  82 /* These macros reverse the bytes during the move, converting little-endian to big endian */
  83
  84          /* Big Endian      <==        Little Endian */
  85          /*  Hi...Lo                     Lo...Hi     */
  86 /* 16-bit source, 16/32/64 destination */
  87
  88 #define ACPI_MOVE_16_TO_16(d, s)        {((  u8 *)(void *)(d))[0] = ((u8 *)(void *)(s))[1];\
  89                           ((  u8 *)(void *)(d))[1] = ((u8 *)(void *)(s))[0];}
  90
  91 #define ACPI_MOVE_16_TO_32(d, s)        {(*(u32 *)(void *)(d))=0;\
  92                                           ((u8 *)(void *)(d))[2] = ((u8 *)(void *)(s))[1];\
  93                                           ((u8 *)(void *)(d))[3] = ((u8 *)(void *)(s))[0];}
  94
  95 #define ACPI_MOVE_16_TO_64(d, s)        {(*(u64 *)(void *)(d))=0;\
  96                                                            ((u8 *)(void *)(d))[6] = ((u8 *)(void *)(s))[1];\
  97                                                            ((u8 *)(void *)(d))[7] = ((u8 *)(void *)(s))[0];}
  98
  99 /* 32-bit source, 16/32/64 destination */
 100
 101 #define ACPI_MOVE_32_TO_16(d, s)        ACPI_MOVE_16_TO_16(d, s)        /* Truncate to 16 */
 102
 103 #define ACPI_MOVE_32_TO_32(d, s)        {((  u8 *)(void *)(d))[0] = ((u8 *)(void *)(s))[3];\
 104                                                                           ((  u8 *)(void *)(d))[1] = ((u8 *)(void *)(s))[2];\
 105                                                                           ((  u8 *)(void *)(d))[2] = ((u8 *)(void *)(s))[1];\
 106                                                                           ((  u8 *)(void *)(d))[3] = ((u8 *)(void *)(s))[0];}
 107
 108 #define ACPI_MOVE_32_TO_64(d, s)        {(*(u64 *)(void *)(d))=0;\
 109                                                                                    ((u8 *)(void *)(d))[4] = ((u8 *)(void *)(s))[3];\
 110                                                                                    ((u8 *)(void *)(d))[5] = ((u8 *)(void *)(s))[2];\
 111                                                                                    ((u8 *)(void *)(d))[6] = ((u8 *)(void *)(s))[1];\
 112                                                                                    ((u8 *)(void *)(d))[7] = ((u8 *)(void *)(s))[0];}
 113
 114 /* 64-bit source, 16/32/64 destination */
 115
 116 #define ACPI_MOVE_64_TO_16(d, s)        ACPI_MOVE_16_TO_16(d, s)        /* Truncate to 16 */
 117
 118 #define ACPI_MOVE_64_TO_32(d, s)        ACPI_MOVE_32_TO_32(d, s)        /* Truncate to 32 */
 119
 120 #define ACPI_MOVE_64_TO_64(d, s)        {((  u8 *)(void *)(d))[0] = ((u8 *)(void *)(s))[7];\
 121                                                                                  ((  u8 *)(void *)(d))[1] = ((u8 *)(void *)(s))[6];\
 122                                                                                  ((  u8 *)(void *)(d))[2] = ((u8 *)(void *)(s))[5];\
 123                                                                                  ((  u8 *)(void *)(d))[3] = ((u8 *)(void *)(s))[4];\
 124                                                                                  ((  u8 *)(void *)(d))[4] = ((u8 *)(void *)(s))[3];\
 125                                                                                  ((  u8 *)(void *)(d))[5] = ((u8 *)(void *)(s))[2];\
 126                                                                                  ((  u8 *)(void *)(d))[6] = ((u8 *)(void *)(s))[1];\
 127                                                                                  ((  u8 *)(void *)(d))[7] = ((u8 *)(void *)(s))[0];}
 128 #else
 129 /*
 130  * Macros for little-endian machines
 131  */
 132
 133 #ifndef ACPI_MISALIGNMENT_NOT_SUPPORTED
 134
 135 /* The hardware supports unaligned transfers, just do the little-endian move */
 136
 137 /* 16-bit source, 16/32/64 destination */
 138
 139 #define ACPI_MOVE_16_TO_16(d, s)        *(u16 *)(void *)(d) = *(u16 *)(void *)(s)
 140 #define ACPI_MOVE_16_TO_32(d, s)        *(u32 *)(void *)(d) = *(u16 *)(void *)(s)
 141 #define ACPI_MOVE_16_TO_64(d, s)        *(u64 *)(void *)(d) = *(u16 *)(void *)(s)
 142
 143 /* 32-bit source, 16/32/64 destination */
 144
 145 #define ACPI_MOVE_32_TO_16(d, s)        ACPI_MOVE_16_TO_16(d, s)        /* Truncate to 16 */
 146 #define ACPI_MOVE_32_TO_32(d, s)        *(u32 *)(void *)(d) = *(u32 *)(void *)(s)
 147 #define ACPI_MOVE_32_TO_64(d, s)        *(u64 *)(void *)(d) = *(u32 *)(void *)(s)
 148
 149 /* 64-bit source, 16/32/64 destination */
 150
 151 #define ACPI_MOVE_64_TO_16(d, s)        ACPI_MOVE_16_TO_16(d, s)        /* Truncate to 16 */
 152 #define ACPI_MOVE_64_TO_32(d, s)        ACPI_MOVE_32_TO_32(d, s)        /* Truncate to 32 */
 153 #define ACPI_MOVE_64_TO_64(d, s)        *(u64 *)(void *)(d) = *(u64 *)(void *)(s)
 154
 155 #else
 156 /*
 157  * The hardware does not support unaligned transfers. We must move the
 158  * data one byte at a time. These macros work whether the source or
 159  * the destination (or both) is/are unaligned. (Little-endian move)
 160  */
 161
 162 /* 16-bit source, 16/32/64 destination */
 163
 164 #define ACPI_MOVE_16_TO_16(d, s)        {((  u8 *)(void *)(d))[0] = ((u8 *)(void *)(s))[0];\
 165                                                                                  ((  u8 *)(void *)(d))[1] = ((u8 *)(void *)(s))[1];}
 166
 167 #define ACPI_MOVE_16_TO_32(d, s)        {(*(u32 *)(void *)(d)) = 0; ACPI_MOVE_16_TO_16(d, s);}
 168 #define ACPI_MOVE_16_TO_64(d, s)        {(*(u64 *)(void *)(d)) = 0; ACPI_MOVE_16_TO_16(d, s);}
 169
 170 /* 32-bit source, 16/32/64 destination */
 171
 172 #define ACPI_MOVE_32_TO_16(d, s)        ACPI_MOVE_16_TO_16(d, s)        /* Truncate to 16 */
 173
 174 #define ACPI_MOVE_32_TO_32(d, s)        {((  u8 *)(void *)(d))[0] = ((u8 *)(void *)(s))[0];\
 175                                                                                  ((  u8 *)(void *)(d))[1] = ((u8 *)(void *)(s))[1];\
 176                                                                                  ((  u8 *)(void *)(d))[2] = ((u8 *)(void *)(s))[2];\
 177                                                                                  ((  u8 *)(void *)(d))[3] = ((u8 *)(void *)(s))[3];}
 178
 179 #define ACPI_MOVE_32_TO_64(d, s)        {(*(u64 *)(void *)(d)) = 0; ACPI_MOVE_32_TO_32(d, s);}
 180
 181 /* 64-bit source, 16/32/64 destination */
 182
 183 #define ACPI_MOVE_64_TO_16(d, s)        ACPI_MOVE_16_TO_16(d, s)        /* Truncate to 16 */
 184 #define ACPI_MOVE_64_TO_32(d, s)        ACPI_MOVE_32_TO_32(d, s)        /* Truncate to 32 */
 185 #define ACPI_MOVE_64_TO_64(d, s)        {((  u8 *)(void *)(d))[0] = ((u8 *)(void *)(s))[0];\
 186                                                                                  ((  u8 *)(void *)(d))[1] = ((u8 *)(void *)(s))[1];\
 187                                                                                  ((  u8 *)(void *)(d))[2] = ((u8 *)(void *)(s))[2];\
 188                                                                                  ((  u8 *)(void *)(d))[3] = ((u8 *)(void *)(s))[3];\
 189                                                                                  ((  u8 *)(void *)(d))[4] = ((u8 *)(void *)(s))[4];\
 190                                                                                  ((  u8 *)(void *)(d))[5] = ((u8 *)(void *)(s))[5];\
 191                                                                                  ((  u8 *)(void *)(d))[6] = ((u8 *)(void *)(s))[6];\
 192                                                                                  ((  u8 *)(void *)(d))[7] = ((u8 *)(void *)(s))[7];}
 193 #endif
 194 #endif
 195
 196 /*
 197  * Fast power-of-two math macros for non-optimized compilers
 198  */
 199 #define _ACPI_DIV(value, power_of2)     ((u32) ((value) >> (power_of2)))
 200 #define _ACPI_MUL(value, power_of2)     ((u32) ((value) << (power_of2)))
 201 #define _ACPI_MOD(value, divisor)       ((u32) ((value) & ((divisor) -1)))
 202
 203 #define ACPI_DIV_2(a)                   _ACPI_DIV(a, 1)
 204 #define ACPI_MUL_2(a)                   _ACPI_MUL(a, 1)
 205 #define ACPI_MOD_2(a)                   _ACPI_MOD(a, 2)
 206
 207 #define ACPI_DIV_4(a)                   _ACPI_DIV(a, 2)
 208 #define ACPI_MUL_4(a)                   _ACPI_MUL(a, 2)
 209 #define ACPI_MOD_4(a)                   _ACPI_MOD(a, 4)
 210
 211 #define ACPI_DIV_8(a)                   _ACPI_DIV(a, 3)
 212 #define ACPI_MUL_8(a)                   _ACPI_MUL(a, 3)
 213 #define ACPI_MOD_8(a)                   _ACPI_MOD(a, 8)
 214
 215 #define ACPI_DIV_16(a)                  _ACPI_DIV(a, 4)
 216 #define ACPI_MUL_16(a)                  _ACPI_MUL(a, 4)
 217 #define ACPI_MOD_16(a)                  _ACPI_MOD(a, 16)
 218
 219 #define ACPI_DIV_32(a)                  _ACPI_DIV(a, 5)
 220 #define ACPI_MUL_32(a)                  _ACPI_MUL(a, 5)
 221 #define ACPI_MOD_32(a)                  _ACPI_MOD(a, 32)
 222
 223 /* Test for ASCII character */
 224
 225 #define ACPI_IS_ASCII(c)                ((c) < 0x80)
 226
 227 /* Signed integers */
 228
 229 #define ACPI_SIGN_POSITIVE              0
 230 #define ACPI_SIGN_NEGATIVE              1
 231
 232 /*
 233  * Rounding macros (Power of two boundaries only)
 234  */
 235 #define ACPI_ROUND_DOWN(value, boundary)    (((acpi_size)(value)) & \
 236                                                                                                 (~(((acpi_size) boundary)-1)))
 237
 238 #define ACPI_ROUND_UP(value, boundary)      ((((acpi_size)(value)) + \
 239                                                                                                 (((acpi_size) boundary)-1)) & \
 240                                                                                                 (~(((acpi_size) boundary)-1)))
 241
 242 /* Note: sizeof(acpi_size) evaluates to either 4 or 8 (32- vs 64-bit mode) */
 243
 244 #define ACPI_ROUND_DOWN_TO_32BIT(a)         ACPI_ROUND_DOWN(a, 4)
 245 #define ACPI_ROUND_DOWN_TO_64BIT(a)         ACPI_ROUND_DOWN(a, 8)
 246 #define ACPI_ROUND_DOWN_TO_NATIVE_WORD(a)   ACPI_ROUND_DOWN(a, sizeof(acpi_size))
 247
 248 #define ACPI_ROUND_UP_TO_32BIT(a)           ACPI_ROUND_UP(a, 4)
 249 #define ACPI_ROUND_UP_TO_64BIT(a)           ACPI_ROUND_UP(a, 8)
 250 #define ACPI_ROUND_UP_TO_NATIVE_WORD(a)     ACPI_ROUND_UP(a, sizeof(acpi_size))
 251
 252 #define ACPI_ROUND_BITS_UP_TO_BYTES(a)      ACPI_DIV_8((a) + 7)
 253 #define ACPI_ROUND_BITS_DOWN_TO_BYTES(a)    ACPI_DIV_8((a))
 254
 255 #define ACPI_ROUND_UP_TO_1K(a)              (((a) + 1023) >> 10)
 256
 257 /* Generic (non-power-of-two) rounding */
 258
 259 #define ACPI_ROUND_UP_TO(value, boundary)   (((value) + ((boundary)-1)) / (boundary))
 260
 261 #define ACPI_IS_MISALIGNED(value)           (((acpi_size) value) & (sizeof(acpi_size)-1))
 262
 263 /* Generic bit manipulation */
 264
 265 #ifndef ACPI_USE_NATIVE_BIT_FINDER
 266
 267 #define __ACPI_FIND_LAST_BIT_2(a, r)        ((((u8)  (a)) & 0x02) ? (r)+1 : (r))
 268 #define __ACPI_FIND_LAST_BIT_4(a, r)        ((((u8)  (a)) & 0x0C) ? \
 269                                                                                          __ACPI_FIND_LAST_BIT_2  ((a)>>2,  (r)+2) : \
 270                                                                                          __ACPI_FIND_LAST_BIT_2  ((a), (r)))
 271 #define __ACPI_FIND_LAST_BIT_8(a, r)        ((((u8)  (a)) & 0xF0) ? \
 272                                                                                          __ACPI_FIND_LAST_BIT_4  ((a)>>4,  (r)+4) : \
 273                                                                                          __ACPI_FIND_LAST_BIT_4  ((a), (r)))
 274 #define __ACPI_FIND_LAST_BIT_16(a, r)       ((((u16) (a)) & 0xFF00) ? \
 275                                                                                          __ACPI_FIND_LAST_BIT_8  ((a)>>8,  (r)+8) : \
 276                                                                                          __ACPI_FIND_LAST_BIT_8  ((a), (r)))
 277 #define __ACPI_FIND_LAST_BIT_32(a, r)       ((((u32) (a)) & 0xFFFF0000) ? \
 278                                                                                          __ACPI_FIND_LAST_BIT_16 ((a)>>16, (r)+16) : \
 279                                                                                          __ACPI_FIND_LAST_BIT_16 ((a), (r)))
 280 #define __ACPI_FIND_LAST_BIT_64(a, r)       ((((u64) (a)) & 0xFFFFFFFF00000000) ? \
 281                                                                                          __ACPI_FIND_LAST_BIT_32 ((a)>>32, (r)+32) : \
 282                                                                                          __ACPI_FIND_LAST_BIT_32 ((a), (r)))
 283
 284 #define ACPI_FIND_LAST_BIT_8(a)             ((a) ? __ACPI_FIND_LAST_BIT_8 (a, 1) : 0)
 285 #define ACPI_FIND_LAST_BIT_16(a)            ((a) ? __ACPI_FIND_LAST_BIT_16 (a, 1) : 0)
 286 #define ACPI_FIND_LAST_BIT_32(a)            ((a) ? __ACPI_FIND_LAST_BIT_32 (a, 1) : 0)
 287 #define ACPI_FIND_LAST_BIT_64(a)            ((a) ? __ACPI_FIND_LAST_BIT_64 (a, 1) : 0)
 288
 289 #define __ACPI_FIND_FIRST_BIT_2(a, r)       ((((u8) (a)) & 0x01) ? (r) : (r)+1)
 290 #define __ACPI_FIND_FIRST_BIT_4(a, r)       ((((u8) (a)) & 0x03) ? \
 291                                                                                          __ACPI_FIND_FIRST_BIT_2  ((a), (r)) : \
 292                                                                                          __ACPI_FIND_FIRST_BIT_2  ((a)>>2, (r)+2))
 293 #define __ACPI_FIND_FIRST_BIT_8(a, r)       ((((u8) (a)) & 0x0F) ? \
 294                                                                                          __ACPI_FIND_FIRST_BIT_4  ((a), (r)) : \
 295                                                                                          __ACPI_FIND_FIRST_BIT_4  ((a)>>4, (r)+4))
 296 #define __ACPI_FIND_FIRST_BIT_16(a, r)      ((((u16) (a)) & 0x00FF) ? \
 297                                                                                          __ACPI_FIND_FIRST_BIT_8  ((a), (r)) : \
 298                                                                                          __ACPI_FIND_FIRST_BIT_8  ((a)>>8, (r)+8))
 299 #define __ACPI_FIND_FIRST_BIT_32(a, r)      ((((u32) (a)) & 0x0000FFFF) ? \
 300                                                                                          __ACPI_FIND_FIRST_BIT_16 ((a), (r)) : \
 301                                                                                          __ACPI_FIND_FIRST_BIT_16 ((a)>>16, (r)+16))
 302 #define __ACPI_FIND_FIRST_BIT_64(a, r)      ((((u64) (a)) & 0x00000000FFFFFFFF) ? \
 303                                                                                          __ACPI_FIND_FIRST_BIT_32 ((a), (r)) : \
 304                                                                                          __ACPI_FIND_FIRST_BIT_32 ((a)>>32, (r)+32))
 305
 306 #define ACPI_FIND_FIRST_BIT_8(a)            ((a) ? __ACPI_FIND_FIRST_BIT_8 (a, 1) : 0)
 307 #define ACPI_FIND_FIRST_BIT_16(a)           ((a) ? __ACPI_FIND_FIRST_BIT_16 (a, 1) : 0)
 308 #define ACPI_FIND_FIRST_BIT_32(a)           ((a) ? __ACPI_FIND_FIRST_BIT_32 (a, 1) : 0)
 309 #define ACPI_FIND_FIRST_BIT_64(a)           ((a) ? __ACPI_FIND_FIRST_BIT_64 (a, 1) : 0)
 310
 311 #endif                          /* ACPI_USE_NATIVE_BIT_FINDER */
 312
 313 /* Generic (power-of-two) rounding */
 314
 315 #define ACPI_ROUND_UP_POWER_OF_TWO_8(a)     ((u8) \
 316                                                                                         (((u16) 1) <<  ACPI_FIND_LAST_BIT_8  ((a)  - 1)))
 317 #define ACPI_ROUND_DOWN_POWER_OF_TWO_8(a)   ((u8) \
 318                                                                                         (((u16) 1) << (ACPI_FIND_LAST_BIT_8  ((a)) - 1)))
 319 #define ACPI_ROUND_UP_POWER_OF_TWO_16(a)    ((u16) \
 320                                                                                         (((u32) 1) <<  ACPI_FIND_LAST_BIT_16 ((a)  - 1)))
 321 #define ACPI_ROUND_DOWN_POWER_OF_TWO_16(a)  ((u16) \
 322                                                                                         (((u32) 1) << (ACPI_FIND_LAST_BIT_16 ((a)) - 1)))
 323 #define ACPI_ROUND_UP_POWER_OF_TWO_32(a)    ((u32) \
 324                                                                                         (((u64) 1) <<  ACPI_FIND_LAST_BIT_32 ((a)  - 1)))
 325 #define ACPI_ROUND_DOWN_POWER_OF_TWO_32(a)  ((u32) \
 326                                                                                         (((u64) 1) << (ACPI_FIND_LAST_BIT_32 ((a)) - 1)))
 327 #define ACPI_IS_ALIGNED(a, s)               (((a) & ((s) - 1)) == 0)
 328 #define ACPI_IS_POWER_OF_TWO(a)             ACPI_IS_ALIGNED(a, a)
 329
 330 /*
 331  * Bitmask creation
 332  * Bit positions start at zero.
 333  * MASK_BITS_ABOVE creates a mask starting AT the position and above
 334  * MASK_BITS_BELOW creates a mask starting one bit BELOW the position
 335  * MASK_BITS_ABOVE/BELOW accepts a bit offset to create a mask
 336  * MASK_BITS_ABOVE/BELOW_32/64 accepts a bit width to create a mask
 337  * Note: The ACPI_INTEGER_BIT_SIZE check is used to bypass compiler
 338  * differences with the shift operator
 339  */
 340 #define ACPI_MASK_BITS_ABOVE(position)      (~((ACPI_UINT64_MAX) << ((u32) (position))))
 341 #define ACPI_MASK_BITS_BELOW(position)      ((ACPI_UINT64_MAX) << ((u32) (position)))
 342 #define ACPI_MASK_BITS_ABOVE_32(width)      ((u32) ACPI_MASK_BITS_ABOVE(width))
 343 #define ACPI_MASK_BITS_BELOW_32(width)      ((u32) ACPI_MASK_BITS_BELOW(width))
 344 #define ACPI_MASK_BITS_ABOVE_64(width)      ((width) == ACPI_INTEGER_BIT_SIZE ? \
 345                                                                                                 ACPI_UINT64_MAX : \
 346                                                                                                 ACPI_MASK_BITS_ABOVE(width))
 347 #define ACPI_MASK_BITS_BELOW_64(width)      ((width) == ACPI_INTEGER_BIT_SIZE ? \
 348                                                                                                 (u64) 0 : \
 349                                                                                                 ACPI_MASK_BITS_BELOW(width))
 350
 351 /* Bitfields within ACPI registers */
 352
 353 #define ACPI_REGISTER_PREPARE_BITS(val, pos, mask) \
 354         ((val << pos) & mask)
 355
 356 #define ACPI_REGISTER_INSERT_VALUE(reg, pos, mask, val) \
 357         reg = (reg & (~(mask))) | ACPI_REGISTER_PREPARE_BITS(val, pos, mask)
 358
 359 #define ACPI_INSERT_BITS(target, mask, source) \
 360         target = ((target & (~(mask))) | (source & mask))
 361
 362 /* Generic bitfield macros and masks */
 363
 364 #define ACPI_GET_BITS(source_ptr, position, mask) \
 365         ((*(source_ptr) >> (position)) & (mask))
 366
 367 #define ACPI_SET_BITS(target_ptr, position, mask, value) \
 368         (*(target_ptr) |= (((value) & (mask)) << (position)))
 369
 370 #define ACPI_1BIT_MASK      0x00000001
 371 #define ACPI_2BIT_MASK      0x00000003
 372 #define ACPI_3BIT_MASK      0x00000007
 373 #define ACPI_4BIT_MASK      0x0000000F
 374 #define ACPI_5BIT_MASK      0x0000001F
 375 #define ACPI_6BIT_MASK      0x0000003F
 376 #define ACPI_7BIT_MASK      0x0000007F
 377 #define ACPI_8BIT_MASK      0x000000FF
 378 #define ACPI_16BIT_MASK     0x0000FFFF
 379 #define ACPI_24BIT_MASK     0x00FFFFFF
 380
 381 /* Macros to extract flag bits from position zero */
 382
 383 #define ACPI_GET_1BIT_FLAG(value)                   ((value) & ACPI_1BIT_MASK)
 384 #define ACPI_GET_2BIT_FLAG(value)                   ((value) & ACPI_2BIT_MASK)
 385 #define ACPI_GET_3BIT_FLAG(value)                   ((value) & ACPI_3BIT_MASK)
 386 #define ACPI_GET_4BIT_FLAG(value)                   ((value) & ACPI_4BIT_MASK)
 387
 388 /* Macros to extract flag bits from position one and above */
 389
 390 #define ACPI_EXTRACT_1BIT_FLAG(field, position)     (ACPI_GET_1BIT_FLAG ((field) >> position))
 391 #define ACPI_EXTRACT_2BIT_FLAG(field, position)     (ACPI_GET_2BIT_FLAG ((field) >> position))
 392 #define ACPI_EXTRACT_3BIT_FLAG(field, position)     (ACPI_GET_3BIT_FLAG ((field) >> position))
 393 #define ACPI_EXTRACT_4BIT_FLAG(field, position)     (ACPI_GET_4BIT_FLAG ((field) >> position))
 394
 395 /* ACPI Pathname helpers */
 396
 397 #define ACPI_IS_ROOT_PREFIX(c)      ((c) == (u8) 0x5C)  /* Backslash */
 398 #define ACPI_IS_PARENT_PREFIX(c)    ((c) == (u8) 0x5E)  /* Carat */
 399 #define ACPI_IS_PATH_SEPARATOR(c)   ((c) == (u8) 0x2E)  /* Period (dot) */
 400
 401 /*
 402  * An object of type struct acpi_namespace_node can appear in some contexts
 403  * where a pointer to an object of type union acpi_operand_object can also
 404  * appear. This macro is used to distinguish them.
 405  *
 406  * The "DescriptorType" field is the second field in both structures.
 407  */
 408 #define ACPI_GET_DESCRIPTOR_PTR(d)      (((union acpi_descriptor *)(void *)(d))->common.common_pointer)
 409 #define ACPI_SET_DESCRIPTOR_PTR(d, p)   (((union acpi_descriptor *)(void *)(d))->common.common_pointer = (p))
 410 #define ACPI_GET_DESCRIPTOR_TYPE(d)     (((union acpi_descriptor *)(void *)(d))->common.descriptor_type)
 411 #define ACPI_SET_DESCRIPTOR_TYPE(d, t)  (((union acpi_descriptor *)(void *)(d))->common.descriptor_type = (t))
 412
 413 /*
 414  * Macros for the master AML opcode table
 415  */
 416 #if defined (ACPI_DISASSEMBLER) || defined (ACPI_DEBUG_OUTPUT)
 417 #define ACPI_OP(name, Pargs, Iargs, obj_type, class, type, flags) \
 418         {name, (u32)(Pargs), (u32)(Iargs), (u32)(flags), obj_type, class, type}
 419 #else
 420 #define ACPI_OP(name, Pargs, Iargs, obj_type, class, type, flags) \
 421         {(u32)(Pargs), (u32)(Iargs), (u32)(flags), obj_type, class, type}
 422 #endif
 423
 424 #define ARG_TYPE_WIDTH                  5
 425 #define ARG_1(x)                        ((u32)(x))
 426 #define ARG_2(x)                        ((u32)(x) << (1 * ARG_TYPE_WIDTH))
 427 #define ARG_3(x)                        ((u32)(x) << (2 * ARG_TYPE_WIDTH))
 428 #define ARG_4(x)                        ((u32)(x) << (3 * ARG_TYPE_WIDTH))
 429 #define ARG_5(x)                        ((u32)(x) << (4 * ARG_TYPE_WIDTH))
 430 #define ARG_6(x)                        ((u32)(x) << (5 * ARG_TYPE_WIDTH))
 431
 432 #define ARGI_LIST1(a)                   (ARG_1(a))
 433 #define ARGI_LIST2(a, b)                (ARG_1(b)|ARG_2(a))
 434 #define ARGI_LIST3(a, b, c)             (ARG_1(c)|ARG_2(b)|ARG_3(a))
 435 #define ARGI_LIST4(a, b, c, d)          (ARG_1(d)|ARG_2(c)|ARG_3(b)|ARG_4(a))
 436 #define ARGI_LIST5(a, b, c, d, e)       (ARG_1(e)|ARG_2(d)|ARG_3(c)|ARG_4(b)|ARG_5(a))
 437 #define ARGI_LIST6(a, b, c, d, e, f)    (ARG_1(f)|ARG_2(e)|ARG_3(d)|ARG_4(c)|ARG_5(b)|ARG_6(a))
 438
 439 #define ARGP_LIST1(a)                   (ARG_1(a))
 440 #define ARGP_LIST2(a, b)                (ARG_1(a)|ARG_2(b))
 441 #define ARGP_LIST3(a, b, c)             (ARG_1(a)|ARG_2(b)|ARG_3(c))
 442 #define ARGP_LIST4(a, b, c, d)          (ARG_1(a)|ARG_2(b)|ARG_3(c)|ARG_4(d))
 443 #define ARGP_LIST5(a, b, c, d, e)       (ARG_1(a)|ARG_2(b)|ARG_3(c)|ARG_4(d)|ARG_5(e))
 444 #define ARGP_LIST6(a, b, c, d, e, f)    (ARG_1(a)|ARG_2(b)|ARG_3(c)|ARG_4(d)|ARG_5(e)|ARG_6(f))
 445
 446 #define GET_CURRENT_ARG_TYPE(list)      (list & ((u32) 0x1F))
 447 #define INCREMENT_ARG_LIST(list)        (list >>= ((u32) ARG_TYPE_WIDTH))
 448
 449 /*
 450  * Ascii error messages can be configured out
 451  */
 452 #ifndef ACPI_NO_ERROR_MESSAGES
 453 /*
 454  * Error reporting. The callers module and line number are inserted by AE_INFO,
 455  * the plist contains a set of parens to allow variable-length lists.
 456  * These macros are used for both the debug and non-debug versions of the code.
 457  */
 458 #define ACPI_ERROR_NAMESPACE(s, e)          acpi_ut_namespace_error (AE_INFO, s, e);
 459 #define ACPI_ERROR_METHOD(s, n, p, e)       acpi_ut_method_error (AE_INFO, s, n, p, e);
 460 #define ACPI_WARN_PREDEFINED(plist)         acpi_ut_predefined_warning plist
 461 #define ACPI_INFO_PREDEFINED(plist)         acpi_ut_predefined_info plist
 462 #define ACPI_BIOS_ERROR_PREDEFINED(plist)   acpi_ut_predefined_bios_error plist
 463
 464 #else
 465
 466 /* No error messages */
 467
 468 #define ACPI_ERROR_NAMESPACE(s, e)
 469 #define ACPI_ERROR_METHOD(s, n, p, e)
 470 #define ACPI_WARN_PREDEFINED(plist)
 471 #define ACPI_INFO_PREDEFINED(plist)
 472 #define ACPI_BIOS_ERROR_PREDEFINED(plist)
 473
 474 #endif                          /* ACPI_NO_ERROR_MESSAGES */
 475
 476 #if (!ACPI_REDUCED_HARDWARE)
 477 #define ACPI_HW_OPTIONAL_FUNCTION(addr)     addr
 478 #else
 479 #define ACPI_HW_OPTIONAL_FUNCTION(addr)     NULL
 480 #endif
 481
 482 /*
 483  * Macros used for ACPICA utilities only
 484  */
 485
 486 /* Generate a UUID */
 487
 488 #define ACPI_INIT_UUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
 489         (a) & 0xFF, ((a) >> 8) & 0xFF, ((a) >> 16) & 0xFF, ((a) >> 24) & 0xFF, \
 490         (b) & 0xFF, ((b) >> 8) & 0xFF, \
 491         (c) & 0xFF, ((c) >> 8) & 0xFF, \
 492         (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7)
 493
 494 #define ACPI_IS_OCTAL_DIGIT(d)              (((char)(d) >= '0') && ((char)(d) <= '7'))
 495
 496 /*
 497  * Macors used for the ASL-/ASL+ converter utility
 498  */
 499 #ifdef ACPI_ASL_COMPILER
 500
 501 #define ASL_CV_LABEL_FILENODE(a)         cv_label_file_node(a);
 502 #define ASL_CV_CAPTURE_COMMENTS_ONLY(a)   cv_capture_comments_only (a);
 503 #define ASL_CV_CAPTURE_COMMENTS(a)       cv_capture_comments (a);
 504 #define ASL_CV_TRANSFER_COMMENTS(a)      cv_transfer_comments (a);
 505 #define ASL_CV_CLOSE_PAREN(a,b)          cv_close_paren_write_comment(a,b);
 506 #define ASL_CV_CLOSE_BRACE(a,b)          cv_close_brace_write_comment(a,b);
 507 #define ASL_CV_SWITCH_FILES(a,b)         cv_switch_files(a,b);
 508 #define ASL_CV_CLEAR_OP_COMMENTS(a)       cv_clear_op_comments(a);
 509 #define ASL_CV_PRINT_ONE_COMMENT(a,b,c,d) cv_print_one_comment_type (a,b,c,d);
 510 #define ASL_CV_PRINT_ONE_COMMENT_LIST(a,b) cv_print_one_comment_list (a,b);
 511 #define ASL_CV_FILE_HAS_SWITCHED(a)       cv_file_has_switched(a)
 512 #define ASL_CV_INIT_FILETREE(a,b,c)      cv_init_file_tree(a,b,c);
 513
 514 #else
 515
 516 #define ASL_CV_LABEL_FILENODE(a)
 517 #define ASL_CV_CAPTURE_COMMENTS_ONLY(a)
 518 #define ASL_CV_CAPTURE_COMMENTS(a)
 519 #define ASL_CV_TRANSFER_COMMENTS(a)
 520 #define ASL_CV_CLOSE_PAREN(a,b)          acpi_os_printf (")");
 521 #define ASL_CV_CLOSE_BRACE(a,b)          acpi_os_printf ("}");
 522 #define ASL_CV_SWITCH_FILES(a,b)
 523 #define ASL_CV_CLEAR_OP_COMMENTS(a)
 524 #define ASL_CV_PRINT_ONE_COMMENT(a,b,c,d)
 525 #define ASL_CV_PRINT_ONE_COMMENT_LIST(a,b)
 526 #define ASL_CV_FILE_HAS_SWITCHED(a)       0
 527 #define ASL_CV_INIT_FILETREE(a,b,c)
 528
 529 #endif
 530
 531 #endif                          /* ACMACROS_H */