include/acpi/acmacros.h

   1 /******************************************************************************
   2  *
   3  * Name: acmacros.h - C macros for the entire subsystem.
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2006, R. Byron Moore
   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  * Data manipulation macros
  49  */
  50 #define ACPI_LOWORD(l)                  ((u16)(u32)(l))
  51 #define ACPI_HIWORD(l)                  ((u16)((((u32)(l)) >> 16) & 0xFFFF))
  52 #define ACPI_LOBYTE(l)                  ((u8)(u16)(l))
  53 #define ACPI_HIBYTE(l)                  ((u8)((((u16)(l)) >> 8) & 0xFF))
  54
  55 #define ACPI_SET_BIT(target,bit)        ((target) |= (bit))
  56 #define ACPI_CLEAR_BIT(target,bit)      ((target) &= ~(bit))
  57 #define ACPI_MIN(a,b)                   (((a)<(b))?(a):(b))
  58
  59 /* Size calculation */
  60
  61 #define ACPI_ARRAY_LENGTH(x)            (sizeof(x) / sizeof((x)[0]))
  62
  63 #if ACPI_MACHINE_WIDTH == 16
  64
  65 /*
  66  * For 16-bit addresses, we have to assume that the upper 32 bits
  67  * (out of 64) are zero.
  68  */
  69 #define ACPI_LODWORD(l)                 ((u32)(l))
  70 #define ACPI_HIDWORD(l)                 ((u32)(0))
  71
  72 #define ACPI_GET_ADDRESS(a)             ((a).lo)
  73 #define ACPI_STORE_ADDRESS(a,b)         {(a).hi=0;(a).lo=(u32)(b);}
  74 #define ACPI_VALID_ADDRESS(a)           ((a).hi | (a).lo)
  75
  76 #else
  77 #ifdef ACPI_NO_INTEGER64_SUPPORT
  78 /*
  79  * acpi_integer is 32-bits, no 64-bit support on this platform
  80  */
  81 #define ACPI_LODWORD(l)                 ((u32)(l))
  82 #define ACPI_HIDWORD(l)                 ((u32)(0))
  83
  84 #define ACPI_GET_ADDRESS(a)             (a)
  85 #define ACPI_STORE_ADDRESS(a,b)         ((a)=(b))
  86 #define ACPI_VALID_ADDRESS(a)           (a)
  87
  88 #else
  89
  90 /*
  91  * Full 64-bit address/integer on both 32-bit and 64-bit platforms
  92  */
  93 #define ACPI_LODWORD(l)                 ((u32)(u64)(l))
  94 #define ACPI_HIDWORD(l)                 ((u32)(((*(struct uint64_struct *)(void *)(&l))).hi))
  95
  96 #define ACPI_GET_ADDRESS(a)             (a)
  97 #define ACPI_STORE_ADDRESS(a,b)         ((a)=(acpi_physical_address)(b))
  98 #define ACPI_VALID_ADDRESS(a)           (a)
  99 #endif
 100 #endif
 101
 102 /*
 103  * printf() format helpers
 104  */
 105
 106 /* Split 64-bit integer into two 32-bit values. Use with %8.8_x%8.8_x */
 107
 108 #define ACPI_FORMAT_UINT64(i)           ACPI_HIDWORD(i),ACPI_LODWORD(i)
 109
 110 /*
 111  * Extract data using a pointer.  Any more than a byte and we
 112  * get into potential aligment issues -- see the STORE macros below.
 113  * Use with care.
 114  */
 115 #define ACPI_GET8(ptr)                  *ACPI_CAST_PTR (u8, ptr)
 116 #define ACPI_GET16(ptr)                 *ACPI_CAST_PTR (u16, ptr)
 117 #define ACPI_GET32(ptr)                 *ACPI_CAST_PTR (u32, ptr)
 118 #define ACPI_GET64(ptr)                 *ACPI_CAST_PTR (u64, ptr)
 119 #define ACPI_SET8(ptr)                  *ACPI_CAST_PTR (u8, ptr)
 120 #define ACPI_SET16(ptr)                 *ACPI_CAST_PTR (u16, ptr)
 121 #define ACPI_SET32(ptr)                 *ACPI_CAST_PTR (u32, ptr)
 122 #define ACPI_SET64(ptr)                 *ACPI_CAST_PTR (u64, ptr)
 123
 124 /*
 125  * Pointer manipulation
 126  */
 127 #define ACPI_CAST_PTR(t, p)             ((t *) (acpi_uintptr_t) (p))
 128 #define ACPI_CAST_INDIRECT_PTR(t, p)    ((t **) (acpi_uintptr_t) (p))
 129 #define ACPI_ADD_PTR(t,a,b)             ACPI_CAST_PTR (t, (ACPI_CAST_PTR (u8,(a)) + (acpi_native_uint)(b)))
 130 #define ACPI_PTR_DIFF(a,b)              (acpi_native_uint) (ACPI_CAST_PTR (u8,(a)) - ACPI_CAST_PTR (u8,(b)))
 131
 132 /* Pointer/Integer type conversions */
 133
 134 #define ACPI_TO_POINTER(i)              ACPI_ADD_PTR (void,(void *) NULL,(acpi_native_uint) i)
 135 #define ACPI_TO_INTEGER(p)              ACPI_PTR_DIFF (p,(void *) NULL)
 136 #define ACPI_OFFSET(d,f)                (acpi_size) ACPI_PTR_DIFF (&(((d *)0)->f),(void *) NULL)
 137
 138 #if ACPI_MACHINE_WIDTH == 16
 139 #define ACPI_STORE_POINTER(d,s)         ACPI_MOVE_32_TO_32(d,s)
 140 #define ACPI_PHYSADDR_TO_PTR(i)         (void *)(i)
 141 #define ACPI_PTR_TO_PHYSADDR(i)         (u32) ACPI_CAST_PTR (u8,(i))
 142 #else
 143 #define ACPI_PHYSADDR_TO_PTR(i)         ACPI_TO_POINTER(i)
 144 #define ACPI_PTR_TO_PHYSADDR(i)         ACPI_TO_INTEGER(i)
 145 #endif
 146
 147 #ifndef ACPI_MISALIGNMENT_NOT_SUPPORTED
 148 #define ACPI_COMPARE_NAME(a,b)          (*ACPI_CAST_PTR (u32,(a)) == *ACPI_CAST_PTR (u32,(b)))
 149 #else
 150 #define ACPI_COMPARE_NAME(a,b)          (!ACPI_STRNCMP (ACPI_CAST_PTR (char,(a)), ACPI_CAST_PTR (char,(b)), ACPI_NAME_SIZE))
 151 #endif
 152
 153 /*
 154  * Macros for moving data around to/from buffers that are possibly unaligned.
 155  * If the hardware supports the transfer of unaligned data, just do the store.
 156  * Otherwise, we have to move one byte at a time.
 157  */
 158 #ifdef ACPI_BIG_ENDIAN
 159 /*
 160  * Macros for big-endian machines
 161  */
 162
 163 /* This macro sets a buffer index, starting from the end of the buffer */
 164
 165 #define ACPI_BUFFER_INDEX(buf_len,buf_offset,byte_gran) ((buf_len) - (((buf_offset)+1) * (byte_gran)))
 166
 167 /* These macros reverse the bytes during the move, converting little-endian to big endian */
 168
 169          /* Big Endian      <==        Little Endian */
 170          /*  Hi...Lo                     Lo...Hi     */
 171 /* 16-bit source, 16/32/64 destination */
 172
 173 #define ACPI_MOVE_16_TO_16(d,s)         {((  u8 *)(void *)(d))[0] = ((u8 *)(void *)(s))[1];\
 174                           ((  u8 *)(void *)(d))[1] = ((u8 *)(void *)(s))[0];}
 175
 176 #define ACPI_MOVE_16_TO_32(d,s)         {(*(u32 *)(void *)(d))=0;\
 177                                           ((u8 *)(void *)(d))[2] = ((u8 *)(void *)(s))[1];\
 178                                           ((u8 *)(void *)(d))[3] = ((u8 *)(void *)(s))[0];}
 179
 180 #define ACPI_MOVE_16_TO_64(d,s)         {(*(u64 *)(void *)(d))=0;\
 181                                                            ((u8 *)(void *)(d))[6] = ((u8 *)(void *)(s))[1];\
 182                                                            ((u8 *)(void *)(d))[7] = ((u8 *)(void *)(s))[0];}
 183
 184 /* 32-bit source, 16/32/64 destination */
 185
 186 #define ACPI_MOVE_32_TO_16(d,s)         ACPI_MOVE_16_TO_16(d,s) /* Truncate to 16 */
 187
 188 #define ACPI_MOVE_32_TO_32(d,s)         {((  u8 *)(void *)(d))[0] = ((u8 *)(void *)(s))[3];\
 189                                                                           ((  u8 *)(void *)(d))[1] = ((u8 *)(void *)(s))[2];\
 190                                                                           ((  u8 *)(void *)(d))[2] = ((u8 *)(void *)(s))[1];\
 191                                                                           ((  u8 *)(void *)(d))[3] = ((u8 *)(void *)(s))[0];}
 192
 193 #define ACPI_MOVE_32_TO_64(d,s)         {(*(u64 *)(void *)(d))=0;\
 194                                                                                    ((u8 *)(void *)(d))[4] = ((u8 *)(void *)(s))[3];\
 195                                                                                    ((u8 *)(void *)(d))[5] = ((u8 *)(void *)(s))[2];\
 196                                                                                    ((u8 *)(void *)(d))[6] = ((u8 *)(void *)(s))[1];\
 197                                                                                    ((u8 *)(void *)(d))[7] = ((u8 *)(void *)(s))[0];}
 198
 199 /* 64-bit source, 16/32/64 destination */
 200
 201 #define ACPI_MOVE_64_TO_16(d,s)         ACPI_MOVE_16_TO_16(d,s) /* Truncate to 16 */
 202
 203 #define ACPI_MOVE_64_TO_32(d,s)         ACPI_MOVE_32_TO_32(d,s) /* Truncate to 32 */
 204
 205 #define ACPI_MOVE_64_TO_64(d,s)         {((  u8 *)(void *)(d))[0] = ((u8 *)(void *)(s))[7];\
 206                                                                                  ((  u8 *)(void *)(d))[1] = ((u8 *)(void *)(s))[6];\
 207                                                                                  ((  u8 *)(void *)(d))[2] = ((u8 *)(void *)(s))[5];\
 208                                                                                  ((  u8 *)(void *)(d))[3] = ((u8 *)(void *)(s))[4];\
 209                                                                                  ((  u8 *)(void *)(d))[4] = ((u8 *)(void *)(s))[3];\
 210                                                                                  ((  u8 *)(void *)(d))[5] = ((u8 *)(void *)(s))[2];\
 211                                                                                  ((  u8 *)(void *)(d))[6] = ((u8 *)(void *)(s))[1];\
 212                                                                                  ((  u8 *)(void *)(d))[7] = ((u8 *)(void *)(s))[0];}
 213 #else
 214 /*
 215  * Macros for little-endian machines
 216  */
 217
 218 /* This macro sets a buffer index, starting from the beginning of the buffer */
 219
 220 #define ACPI_BUFFER_INDEX(buf_len,buf_offset,byte_gran) (buf_offset)
 221
 222 #ifndef ACPI_MISALIGNMENT_NOT_SUPPORTED
 223
 224 /* The hardware supports unaligned transfers, just do the little-endian move */
 225
 226 #if ACPI_MACHINE_WIDTH == 16
 227
 228 /* No 64-bit integers */
 229 /* 16-bit source, 16/32/64 destination */
 230
 231 #define ACPI_MOVE_16_TO_16(d,s)         *(u16 *)(void *)(d) = *(u16 *)(void *)(s)
 232 #define ACPI_MOVE_16_TO_32(d,s)         *(u32 *)(void *)(d) = *(u16 *)(void *)(s)
 233 #define ACPI_MOVE_16_TO_64(d,s)         ACPI_MOVE_16_TO_32(d,s)
 234
 235 /* 32-bit source, 16/32/64 destination */
 236
 237 #define ACPI_MOVE_32_TO_16(d,s)         ACPI_MOVE_16_TO_16(d,s) /* Truncate to 16 */
 238 #define ACPI_MOVE_32_TO_32(d,s)         *(u32 *)(void *)(d) = *(u32 *)(void *)(s)
 239 #define ACPI_MOVE_32_TO_64(d,s)         ACPI_MOVE_32_TO_32(d,s)
 240
 241 /* 64-bit source, 16/32/64 destination */
 242
 243 #define ACPI_MOVE_64_TO_16(d,s)         ACPI_MOVE_16_TO_16(d,s) /* Truncate to 16 */
 244 #define ACPI_MOVE_64_TO_32(d,s)         ACPI_MOVE_32_TO_32(d,s) /* Truncate to 32 */
 245 #define ACPI_MOVE_64_TO_64(d,s)         ACPI_MOVE_32_TO_32(d,s)
 246
 247 #else
 248 /* 16-bit source, 16/32/64 destination */
 249
 250 #define ACPI_MOVE_16_TO_16(d,s)         *(u16 *)(void *)(d) = *(u16 *)(void *)(s)
 251 #define ACPI_MOVE_16_TO_32(d,s)         *(u32 *)(void *)(d) = *(u16 *)(void *)(s)
 252 #define ACPI_MOVE_16_TO_64(d,s)         *(u64 *)(void *)(d) = *(u16 *)(void *)(s)
 253
 254 /* 32-bit source, 16/32/64 destination */
 255
 256 #define ACPI_MOVE_32_TO_16(d,s)         ACPI_MOVE_16_TO_16(d,s) /* Truncate to 16 */
 257 #define ACPI_MOVE_32_TO_32(d,s)         *(u32 *)(void *)(d) = *(u32 *)(void *)(s)
 258 #define ACPI_MOVE_32_TO_64(d,s)         *(u64 *)(void *)(d) = *(u32 *)(void *)(s)
 259
 260 /* 64-bit source, 16/32/64 destination */
 261
 262 #define ACPI_MOVE_64_TO_16(d,s)         ACPI_MOVE_16_TO_16(d,s) /* Truncate to 16 */
 263 #define ACPI_MOVE_64_TO_32(d,s)         ACPI_MOVE_32_TO_32(d,s) /* Truncate to 32 */
 264 #define ACPI_MOVE_64_TO_64(d,s)         *(u64 *)(void *)(d) = *(u64 *)(void *)(s)
 265 #endif
 266
 267 #else
 268 /*
 269  * The hardware does not support unaligned transfers.  We must move the
 270  * data one byte at a time.  These macros work whether the source or
 271  * the destination (or both) is/are unaligned.  (Little-endian move)
 272  */
 273
 274 /* 16-bit source, 16/32/64 destination */
 275
 276 #define ACPI_MOVE_16_TO_16(d,s)         {((  u8 *)(void *)(d))[0] = ((u8 *)(void *)(s))[0];\
 277                                                                                  ((  u8 *)(void *)(d))[1] = ((u8 *)(void *)(s))[1];}
 278
 279 #define ACPI_MOVE_16_TO_32(d,s)         {(*(u32 *)(void *)(d)) = 0; ACPI_MOVE_16_TO_16(d,s);}
 280 #define ACPI_MOVE_16_TO_64(d,s)         {(*(u64 *)(void *)(d)) = 0; ACPI_MOVE_16_TO_16(d,s);}
 281
 282 /* 32-bit source, 16/32/64 destination */
 283
 284 #define ACPI_MOVE_32_TO_16(d,s)         ACPI_MOVE_16_TO_16(d,s) /* Truncate to 16 */
 285
 286 #define ACPI_MOVE_32_TO_32(d,s)         {((  u8 *)(void *)(d))[0] = ((u8 *)(void *)(s))[0];\
 287                                                                                  ((  u8 *)(void *)(d))[1] = ((u8 *)(void *)(s))[1];\
 288                                                                                  ((  u8 *)(void *)(d))[2] = ((u8 *)(void *)(s))[2];\
 289                                                                                  ((  u8 *)(void *)(d))[3] = ((u8 *)(void *)(s))[3];}
 290
 291 #define ACPI_MOVE_32_TO_64(d,s)         {(*(u64 *)(void *)(d)) = 0; ACPI_MOVE_32_TO_32(d,s);}
 292
 293 /* 64-bit source, 16/32/64 destination */
 294
 295 #define ACPI_MOVE_64_TO_16(d,s)         ACPI_MOVE_16_TO_16(d,s) /* Truncate to 16 */
 296 #define ACPI_MOVE_64_TO_32(d,s)         ACPI_MOVE_32_TO_32(d,s) /* Truncate to 32 */
 297 #define ACPI_MOVE_64_TO_64(d,s)         {((  u8 *)(void *)(d))[0] = ((u8 *)(void *)(s))[0];\
 298                                                                                  ((  u8 *)(void *)(d))[1] = ((u8 *)(void *)(s))[1];\
 299                                                                                  ((  u8 *)(void *)(d))[2] = ((u8 *)(void *)(s))[2];\
 300                                                                                  ((  u8 *)(void *)(d))[3] = ((u8 *)(void *)(s))[3];\
 301                                                                                  ((  u8 *)(void *)(d))[4] = ((u8 *)(void *)(s))[4];\
 302                                                                                  ((  u8 *)(void *)(d))[5] = ((u8 *)(void *)(s))[5];\
 303                                                                                  ((  u8 *)(void *)(d))[6] = ((u8 *)(void *)(s))[6];\
 304                                                                                  ((  u8 *)(void *)(d))[7] = ((u8 *)(void *)(s))[7];}
 305 #endif
 306 #endif
 307
 308 /* Macros based on machine integer width */
 309
 310 #if ACPI_MACHINE_WIDTH == 16
 311 #define ACPI_MOVE_SIZE_TO_16(d,s)       ACPI_MOVE_16_TO_16(d,s)
 312
 313 #elif ACPI_MACHINE_WIDTH == 32
 314 #define ACPI_MOVE_SIZE_TO_16(d,s)       ACPI_MOVE_32_TO_16(d,s)
 315
 316 #elif ACPI_MACHINE_WIDTH == 64
 317 #define ACPI_MOVE_SIZE_TO_16(d,s)       ACPI_MOVE_64_TO_16(d,s)
 318
 319 #else
 320 #error unknown ACPI_MACHINE_WIDTH
 321 #endif
 322
 323 /*
 324  * Fast power-of-two math macros for non-optimized compilers
 325  */
 326 #define _ACPI_DIV(value,power_of2)      ((u32) ((value) >> (power_of2)))
 327 #define _ACPI_MUL(value,power_of2)      ((u32) ((value) << (power_of2)))
 328 #define _ACPI_MOD(value,divisor)        ((u32) ((value) & ((divisor) -1)))
 329
 330 #define ACPI_DIV_2(a)                   _ACPI_DIV(a,1)
 331 #define ACPI_MUL_2(a)                   _ACPI_MUL(a,1)
 332 #define ACPI_MOD_2(a)                   _ACPI_MOD(a,2)
 333
 334 #define ACPI_DIV_4(a)                   _ACPI_DIV(a,2)
 335 #define ACPI_MUL_4(a)                   _ACPI_MUL(a,2)
 336 #define ACPI_MOD_4(a)                   _ACPI_MOD(a,4)
 337
 338 #define ACPI_DIV_8(a)                   _ACPI_DIV(a,3)
 339 #define ACPI_MUL_8(a)                   _ACPI_MUL(a,3)
 340 #define ACPI_MOD_8(a)                   _ACPI_MOD(a,8)
 341
 342 #define ACPI_DIV_16(a)                  _ACPI_DIV(a,4)
 343 #define ACPI_MUL_16(a)                  _ACPI_MUL(a,4)
 344 #define ACPI_MOD_16(a)                  _ACPI_MOD(a,16)
 345
 346 #define ACPI_DIV_32(a)                  _ACPI_DIV(a,5)
 347 #define ACPI_MUL_32(a)                  _ACPI_MUL(a,5)
 348 #define ACPI_MOD_32(a)                  _ACPI_MOD(a,32)
 349
 350 /*
 351  * Rounding macros (Power of two boundaries only)
 352  */
 353 #define ACPI_ROUND_DOWN(value,boundary)     (((acpi_native_uint)(value)) & \
 354                                                                                                 (~(((acpi_native_uint) boundary)-1)))
 355
 356 #define ACPI_ROUND_UP(value,boundary)       ((((acpi_native_uint)(value)) + \
 357                                                                                                 (((acpi_native_uint) boundary)-1)) & \
 358                                                                                                 (~(((acpi_native_uint) boundary)-1)))
 359
 360 /* Note: sizeof(acpi_native_uint) evaluates to either 2, 4, or 8 */
 361
 362 #define ACPI_ROUND_DOWN_TO_32BIT(a)         ACPI_ROUND_DOWN(a,4)
 363 #define ACPI_ROUND_DOWN_TO_64BIT(a)         ACPI_ROUND_DOWN(a,8)
 364 #define ACPI_ROUND_DOWN_TO_NATIVE_WORD(a)   ACPI_ROUND_DOWN(a,sizeof(acpi_native_uint))
 365
 366 #define ACPI_ROUND_UP_TO_32BIT(a)           ACPI_ROUND_UP(a,4)
 367 #define ACPI_ROUND_UP_TO_64BIT(a)           ACPI_ROUND_UP(a,8)
 368 #define ACPI_ROUND_UP_TO_NATIVE_WORD(a)     ACPI_ROUND_UP(a,sizeof(acpi_native_uint))
 369
 370 #define ACPI_ROUND_BITS_UP_TO_BYTES(a)      ACPI_DIV_8((a) + 7)
 371 #define ACPI_ROUND_BITS_DOWN_TO_BYTES(a)    ACPI_DIV_8((a))
 372
 373 #define ACPI_ROUND_UP_TO_1K(a)              (((a) + 1023) >> 10)
 374
 375 /* Generic (non-power-of-two) rounding */
 376
 377 #define ACPI_ROUND_UP_TO(value,boundary)    (((value) + ((boundary)-1)) / (boundary))
 378
 379 #define ACPI_IS_MISALIGNED(value)           (((acpi_native_uint)value) & (sizeof(acpi_native_uint)-1))
 380
 381 /*
 382  * Bitmask creation
 383  * Bit positions start at zero.
 384  * MASK_BITS_ABOVE creates a mask starting AT the position and above
 385  * MASK_BITS_BELOW creates a mask starting one bit BELOW the position
 386  */
 387 #define ACPI_MASK_BITS_ABOVE(position)      (~((ACPI_INTEGER_MAX) << ((u32) (position))))
 388 #define ACPI_MASK_BITS_BELOW(position)      ((ACPI_INTEGER_MAX) << ((u32) (position)))
 389
 390 #define ACPI_IS_OCTAL_DIGIT(d)              (((char)(d) >= '0') && ((char)(d) <= '7'))
 391
 392 /* Bitfields within ACPI registers */
 393
 394 #define ACPI_REGISTER_PREPARE_BITS(val, pos, mask)      ((val << pos) & mask)
 395 #define ACPI_REGISTER_INSERT_VALUE(reg, pos, mask, val)  reg = (reg & (~(mask))) | ACPI_REGISTER_PREPARE_BITS(val, pos, mask)
 396
 397 /* Generate a UUID */
 398
 399 #define ACPI_INIT_UUID(a,b,c,d0,d1,d2,d3,d4,d5,d6,d7) \
 400         (a) & 0xFF, ((a) >> 8) & 0xFF, ((a) >> 16) & 0xFF, ((a) >> 24) & 0xFF, \
 401         (b) & 0xFF, ((b) >> 8) & 0xFF, \
 402         (c) & 0xFF, ((c) >> 8) & 0xFF, \
 403         (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7)
 404
 405 /*
 406  * An struct acpi_namespace_node * can appear in some contexts,
 407  * where a pointer to an union acpi_operand_object    can also
 408  * appear.  This macro is used to distinguish them.
 409  *
 410  * The "Descriptor" field is the first field in both structures.
 411  */
 412 #define ACPI_GET_DESCRIPTOR_TYPE(d)     (((union acpi_descriptor *)(void *)(d))->common.descriptor_type)
 413 #define ACPI_SET_DESCRIPTOR_TYPE(d,t)   (((union acpi_descriptor *)(void *)(d))->common.descriptor_type = t)
 414
 415 /* Macro to test the object type */
 416
 417 #define ACPI_GET_OBJECT_TYPE(d)         (((union acpi_operand_object *)(void *)(d))->common.type)
 418
 419 /* Macro to check the table flags for SINGLE or MULTIPLE tables are allowed */
 420
 421 #define ACPI_IS_SINGLE_TABLE(x)         (((x) & 0x01) == ACPI_TABLE_SINGLE ? 1 : 0)
 422
 423 /*
 424  * Macros for the master AML opcode table
 425  */
 426 #if defined(ACPI_DISASSEMBLER) || defined (ACPI_DEBUG_OUTPUT)
 427 #define ACPI_OP(name,Pargs,Iargs,obj_type,class,type,flags)    {name,(u32)(Pargs),(u32)(Iargs),(u32)(flags),obj_type,class,type}
 428 #else
 429 #define ACPI_OP(name,Pargs,Iargs,obj_type,class,type,flags)    {(u32)(Pargs),(u32)(Iargs),(u32)(flags),obj_type,class,type}
 430 #endif
 431
 432 #ifdef ACPI_DISASSEMBLER
 433 #define ACPI_DISASM_ONLY_MEMBERS(a)     a;
 434 #else
 435 #define ACPI_DISASM_ONLY_MEMBERS(a)
 436 #endif
 437
 438 #define ARG_TYPE_WIDTH                  5
 439 #define ARG_1(x)                        ((u32)(x))
 440 #define ARG_2(x)                        ((u32)(x) << (1 * ARG_TYPE_WIDTH))
 441 #define ARG_3(x)                        ((u32)(x) << (2 * ARG_TYPE_WIDTH))
 442 #define ARG_4(x)                        ((u32)(x) << (3 * ARG_TYPE_WIDTH))
 443 #define ARG_5(x)                        ((u32)(x) << (4 * ARG_TYPE_WIDTH))
 444 #define ARG_6(x)                        ((u32)(x) << (5 * ARG_TYPE_WIDTH))
 445
 446 #define ARGI_LIST1(a)                   (ARG_1(a))
 447 #define ARGI_LIST2(a,b)                 (ARG_1(b)|ARG_2(a))
 448 #define ARGI_LIST3(a,b,c)               (ARG_1(c)|ARG_2(b)|ARG_3(a))
 449 #define ARGI_LIST4(a,b,c,d)             (ARG_1(d)|ARG_2(c)|ARG_3(b)|ARG_4(a))
 450 #define ARGI_LIST5(a,b,c,d,e)           (ARG_1(e)|ARG_2(d)|ARG_3(c)|ARG_4(b)|ARG_5(a))
 451 #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))
 452
 453 #define ARGP_LIST1(a)                   (ARG_1(a))
 454 #define ARGP_LIST2(a,b)                 (ARG_1(a)|ARG_2(b))
 455 #define ARGP_LIST3(a,b,c)               (ARG_1(a)|ARG_2(b)|ARG_3(c))
 456 #define ARGP_LIST4(a,b,c,d)             (ARG_1(a)|ARG_2(b)|ARG_3(c)|ARG_4(d))
 457 #define ARGP_LIST5(a,b,c,d,e)           (ARG_1(a)|ARG_2(b)|ARG_3(c)|ARG_4(d)|ARG_5(e))
 458 #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))
 459
 460 #define GET_CURRENT_ARG_TYPE(list)      (list & ((u32) 0x1F))
 461 #define INCREMENT_ARG_LIST(list)        (list >>= ((u32) ARG_TYPE_WIDTH))
 462
 463 #if defined (ACPI_DEBUG_OUTPUT) || !defined (ACPI_NO_ERROR_MESSAGES)
 464 /*
 465  * Module name is include in both debug and non-debug versions primarily for
 466  * error messages. The __FILE__ macro is not very useful for this, because it
 467  * often includes the entire pathname to the module
 468  */
 469 #define ACPI_MODULE_NAME(name)          static char ACPI_UNUSED_VAR *_acpi_module_name = name;
 470 #else
 471 #define ACPI_MODULE_NAME(name)
 472 #endif
 473
 474 /*
 475  * Ascii error messages can be configured out
 476  */
 477 #ifndef ACPI_NO_ERROR_MESSAGES
 478 #define AE_INFO                         _acpi_module_name, __LINE__
 479
 480 /*
 481  * Error reporting. Callers module and line number are inserted by AE_INFO,
 482  * the plist contains a set of parens to allow variable-length lists.
 483  * These macros are used for both the debug and non-debug versions of the code.
 484  */
 485 #define ACPI_INFO(plist)                acpi_ut_info plist
 486 #define ACPI_WARNING(plist)             acpi_ut_warning plist
 487 #define ACPI_EXCEPTION(plist)           acpi_ut_exception plist
 488 #define ACPI_ERROR(plist)               acpi_ut_error plist
 489 #define ACPI_ERROR_NAMESPACE(s,e)       acpi_ns_report_error (AE_INFO, s, e);
 490 #define ACPI_ERROR_METHOD(s,n,p,e)      acpi_ns_report_method_error (AE_INFO, s, n, p, e);
 491
 492 #else
 493
 494 /* No error messages */
 495
 496 #define ACPI_INFO(plist)
 497 #define ACPI_WARNING(plist)
 498 #define ACPI_EXCEPTION(plist)
 499 #define ACPI_ERROR(plist)
 500 #define ACPI_ERROR_NAMESPACE(s,e)
 501 #define ACPI_ERROR_METHOD(s,n,p,e)
 502 #endif
 503
 504 /*
 505  * Debug macros that are conditionally compiled
 506  */
 507 #ifdef ACPI_DEBUG_OUTPUT
 508
 509 /*
 510  * Common parameters used for debug output functions:
 511  * line number, function name, module(file) name, component ID
 512  */
 513 #define ACPI_DEBUG_PARAMETERS           __LINE__, ACPI_GET_FUNCTION_NAME, _acpi_module_name, _COMPONENT
 514
 515 /*
 516  * Function entry tracing
 517  */
 518
 519 /*
 520  * If ACPI_GET_FUNCTION_NAME was not defined in the compiler-dependent header,
 521  * define it now. This is the case where there the compiler does not support
 522  * a __FUNCTION__ macro or equivalent. We save the function name on the
 523  * local stack.
 524  */
 525 #ifndef ACPI_GET_FUNCTION_NAME
 526 #define ACPI_GET_FUNCTION_NAME          _acpi_function_name
 527 /*
 528  * The Name parameter should be the procedure name as a quoted string.
 529  * This is declared as a local string ("MyFunctionName") so that it can
 530  * be also used by the function exit macros below.
 531  * Note: (const char) is used to be compatible with the debug interfaces
 532  * and macros such as __FUNCTION__.
 533  */
 534 #define ACPI_FUNCTION_NAME(name)        const char *_acpi_function_name = #name;
 535
 536 #else
 537 /* Compiler supports __FUNCTION__ (or equivalent) -- Ignore this macro */
 538
 539 #define ACPI_FUNCTION_NAME(name)
 540 #endif
 541
 542 #define ACPI_FUNCTION_TRACE(a)          ACPI_FUNCTION_NAME(a) \
 543                           acpi_ut_trace(ACPI_DEBUG_PARAMETERS)
 544 #define ACPI_FUNCTION_TRACE_PTR(a,b)    ACPI_FUNCTION_NAME(a) \
 545                                            acpi_ut_trace_ptr(ACPI_DEBUG_PARAMETERS,(void *)b)
 546 #define ACPI_FUNCTION_TRACE_U32(a,b)    ACPI_FUNCTION_NAME(a) \
 547                                                          acpi_ut_trace_u32(ACPI_DEBUG_PARAMETERS,(u32)b)
 548 #define ACPI_FUNCTION_TRACE_STR(a,b)    ACPI_FUNCTION_NAME(a) \
 549                                                                           acpi_ut_trace_str(ACPI_DEBUG_PARAMETERS,(char *)b)
 550
 551 #define ACPI_FUNCTION_ENTRY()           acpi_ut_track_stack_ptr()
 552
 553 /*
 554  * Function exit tracing.
 555  * WARNING: These macros include a return statement.  This is usually considered
 556  * bad form, but having a separate exit macro is very ugly and difficult to maintain.
 557  * One of the FUNCTION_TRACE macros above must be used in conjunction with these macros
 558  * so that "_AcpiFunctionName" is defined.
 559  *
 560  * Note: the DO_WHILE0 macro is used to prevent some compilers from complaining
 561  * about these constructs.
 562  */
 563 #ifdef ACPI_USE_DO_WHILE_0
 564 #define ACPI_DO_WHILE0(a)               do a while(0)
 565 #else
 566 #define ACPI_DO_WHILE0(a)               a
 567 #endif
 568
 569 #define return_VOID                     ACPI_DO_WHILE0 ({ \
 570                                                                                         acpi_ut_exit (ACPI_DEBUG_PARAMETERS); \
 571                                                                                         return;})
 572 /*
 573  * There are two versions of most of the return macros. The default version is
 574  * safer, since it avoids side-effects by guaranteeing that the argument will
 575  * not be evaluated twice.
 576  *
 577  * A less-safe version of the macros is provided for optional use if the
 578  * compiler uses excessive CPU stack (for example, this may happen in the
 579  * debug case if code optimzation is disabled.)
 580  */
 581 #ifndef ACPI_SIMPLE_RETURN_MACROS
 582
 583 #define return_ACPI_STATUS(s)           ACPI_DO_WHILE0 ({ \
 584                                                                                         register acpi_status _s = (s); \
 585                                                                                         acpi_ut_status_exit (ACPI_DEBUG_PARAMETERS, _s); \
 586                                                                                         return (_s); })
 587 #define return_PTR(s)                   ACPI_DO_WHILE0 ({ \
 588                                                                                         register void *_s = (void *) (s); \
 589                                                                                         acpi_ut_ptr_exit (ACPI_DEBUG_PARAMETERS, (u8 *) _s); \
 590                                                                                         return (_s); })
 591 #define return_VALUE(s)                 ACPI_DO_WHILE0 ({ \
 592                                                                                         register acpi_integer _s = (s); \
 593                                                                                         acpi_ut_value_exit (ACPI_DEBUG_PARAMETERS, _s); \
 594                                                                                         return (_s); })
 595 #define return_UINT8(s)                 ACPI_DO_WHILE0 ({ \
 596                                                                                         register u8 _s = (u8) (s); \
 597                                                                                         acpi_ut_value_exit (ACPI_DEBUG_PARAMETERS, (acpi_integer) _s); \
 598                                                                                         return (_s); })
 599 #define return_UINT32(s)                ACPI_DO_WHILE0 ({ \
 600                                                                                         register u32 _s = (u32) (s); \
 601                                                                                         acpi_ut_value_exit (ACPI_DEBUG_PARAMETERS, (acpi_integer) _s); \
 602                                                                                         return (_s); })
 603 #else                           /* Use original less-safe macros */
 604
 605 #define return_ACPI_STATUS(s)           ACPI_DO_WHILE0 ({ \
 606                                                                                         acpi_ut_status_exit (ACPI_DEBUG_PARAMETERS, (s)); \
 607                                                                                         return((s)); })
 608 #define return_PTR(s)                   ACPI_DO_WHILE0 ({ \
 609                                                                                         acpi_ut_ptr_exit (ACPI_DEBUG_PARAMETERS, (u8 *) (s)); \
 610                                                                                         return((s)); })
 611 #define return_VALUE(s)                 ACPI_DO_WHILE0 ({ \
 612                                                                                         acpi_ut_value_exit (ACPI_DEBUG_PARAMETERS, (acpi_integer) (s)); \
 613                                                                                         return((s)); })
 614 #define return_UINT8(s)                 return_VALUE(s)
 615 #define return_UINT32(s)                return_VALUE(s)
 616
 617 #endif                          /* ACPI_SIMPLE_RETURN_MACROS */
 618
 619 /* Conditional execution */
 620
 621 #define ACPI_DEBUG_EXEC(a)              a
 622 #define ACPI_NORMAL_EXEC(a)
 623
 624 #define ACPI_DEBUG_DEFINE(a)            a;
 625 #define ACPI_DEBUG_ONLY_MEMBERS(a)      a;
 626 #define _VERBOSE_STRUCTURES
 627
 628 /* Stack and buffer dumping */
 629
 630 #define ACPI_DUMP_STACK_ENTRY(a)        acpi_ex_dump_operand((a),0)
 631 #define ACPI_DUMP_OPERANDS(a,b,c,d,e)   acpi_ex_dump_operands(a,b,c,d,e,_acpi_module_name,__LINE__)
 632
 633 #define ACPI_DUMP_ENTRY(a,b)            acpi_ns_dump_entry (a,b)
 634 #define ACPI_DUMP_PATHNAME(a,b,c,d)     acpi_ns_dump_pathname(a,b,c,d)
 635 #define ACPI_DUMP_RESOURCE_LIST(a)      acpi_rs_dump_resource_list(a)
 636 #define ACPI_DUMP_BUFFER(a,b)           acpi_ut_dump_buffer((u8 *)a,b,DB_BYTE_DISPLAY,_COMPONENT)
 637
 638 /*
 639  * Master debug print macros
 640  * Print iff:
 641  *    1) Debug print for the current component is enabled
 642  *    2) Debug error level or trace level for the print statement is enabled
 643  */
 644 #define ACPI_DEBUG_PRINT(plist)         acpi_ut_debug_print plist
 645 #define ACPI_DEBUG_PRINT_RAW(plist)     acpi_ut_debug_print_raw plist
 646
 647 #else
 648 /*
 649  * This is the non-debug case -- make everything go away,
 650  * leaving no executable debug code!
 651  */
 652 #define ACPI_DEBUG_EXEC(a)
 653 #define ACPI_NORMAL_EXEC(a)             a;
 654
 655 #define ACPI_DEBUG_DEFINE(a)
 656 #define ACPI_DEBUG_ONLY_MEMBERS(a)
 657 #define ACPI_FUNCTION_NAME(a)
 658 #define ACPI_FUNCTION_TRACE(a)
 659 #define ACPI_FUNCTION_TRACE_PTR(a,b)
 660 #define ACPI_FUNCTION_TRACE_U32(a,b)
 661 #define ACPI_FUNCTION_TRACE_STR(a,b)
 662 #define ACPI_FUNCTION_EXIT
 663 #define ACPI_FUNCTION_STATUS_EXIT(s)
 664 #define ACPI_FUNCTION_VALUE_EXIT(s)
 665 #define ACPI_FUNCTION_ENTRY()
 666 #define ACPI_DUMP_STACK_ENTRY(a)
 667 #define ACPI_DUMP_OPERANDS(a,b,c,d,e)
 668 #define ACPI_DUMP_ENTRY(a,b)
 669 #define ACPI_DUMP_TABLES(a,b)
 670 #define ACPI_DUMP_PATHNAME(a,b,c,d)
 671 #define ACPI_DUMP_RESOURCE_LIST(a)
 672 #define ACPI_DUMP_BUFFER(a,b)
 673 #define ACPI_DEBUG_PRINT(pl)
 674 #define ACPI_DEBUG_PRINT_RAW(pl)
 675
 676 #define return_VOID                     return
 677 #define return_ACPI_STATUS(s)           return(s)
 678 #define return_VALUE(s)                 return(s)
 679 #define return_UINT8(s)                 return(s)
 680 #define return_UINT32(s)                return(s)
 681 #define return_PTR(s)                   return(s)
 682
 683 #endif
 684
 685 /*
 686  * Some code only gets executed when the debugger is built in.
 687  * Note that this is entirely independent of whether the
 688  * DEBUG_PRINT stuff (set by ACPI_DEBUG_OUTPUT) is on, or not.
 689  */
 690 #ifdef ACPI_DEBUGGER
 691 #define ACPI_DEBUGGER_EXEC(a)           a
 692 #else
 693 #define ACPI_DEBUGGER_EXEC(a)
 694 #endif
 695
 696 /*
 697  * For 16-bit code, we want to shrink some things even though
 698  * we are using ACPI_DEBUG_OUTPUT to get the debug output
 699  */
 700 #if ACPI_MACHINE_WIDTH == 16
 701 #undef ACPI_DEBUG_ONLY_MEMBERS
 702 #undef _VERBOSE_STRUCTURES
 703 #define ACPI_DEBUG_ONLY_MEMBERS(a)
 704 #endif
 705
 706 #ifdef ACPI_DEBUG_OUTPUT
 707 /*
 708  * 1) Set name to blanks
 709  * 2) Copy the object name
 710  */
 711 #define ACPI_ADD_OBJECT_NAME(a,b)       ACPI_MEMSET (a->common.name, ' ', sizeof (a->common.name));\
 712                                                                                 ACPI_STRNCPY (a->common.name, acpi_gbl_ns_type_names[b], sizeof (a->common.name))
 713 #else
 714
 715 #define ACPI_ADD_OBJECT_NAME(a,b)
 716 #endif
 717
 718 /*
 719  * Memory allocation tracking (DEBUG ONLY)
 720  */
 721 #ifndef ACPI_DBG_TRACK_ALLOCATIONS
 722
 723 /* Memory allocation */
 724
 725 #define ACPI_ALLOCATE(a)            acpi_ut_allocate((acpi_size)(a),_COMPONENT,_acpi_module_name,__LINE__)
 726 #define ACPI_ALLOCATE_ZEROED(a)     acpi_ut_allocate_zeroed((acpi_size)(a), _COMPONENT,_acpi_module_name,__LINE__)
 727 #define ACPI_FREE(a)                acpi_os_free(a)
 728 #define ACPI_MEM_TRACKING(a)
 729
 730 #else
 731
 732 /* Memory allocation */
 733
 734 #define ACPI_ALLOCATE(a)            acpi_ut_allocate_and_track((acpi_size)(a),_COMPONENT,_acpi_module_name,__LINE__)
 735 #define ACPI_ALLOCATE_ZEROED(a)     acpi_ut_allocate_zeroed_and_track((acpi_size)(a), _COMPONENT,_acpi_module_name,__LINE__)
 736 #define ACPI_FREE(a)                acpi_ut_free_and_track(a,_COMPONENT,_acpi_module_name,__LINE__)
 737 #define ACPI_MEM_TRACKING(a)        a
 738
 739 #endif                          /* ACPI_DBG_TRACK_ALLOCATIONS */
 740
 741 #endif                          /* ACMACROS_H */