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 - 2008, 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 aligment issues -- see the STORE macros below.
  50  * Use with care.
  51  */
  52 #define ACPI_GET8(ptr)                  *ACPI_CAST_PTR (u8, ptr)
  53 #define ACPI_GET16(ptr)                 *ACPI_CAST_PTR (u16, ptr)
  54 #define ACPI_GET32(ptr)                 *ACPI_CAST_PTR (u32, ptr)
  55 #define ACPI_GET64(ptr)                 *ACPI_CAST_PTR (u64, ptr)
  56 #define ACPI_SET8(ptr)                  *ACPI_CAST_PTR (u8, ptr)
  57 #define ACPI_SET16(ptr)                 *ACPI_CAST_PTR (u16, ptr)
  58 #define ACPI_SET32(ptr)                 *ACPI_CAST_PTR (u32, ptr)
  59 #define ACPI_SET64(ptr)                 *ACPI_CAST_PTR (u64, ptr)
  60
  61 /*
  62  * printf() format helpers
  63  */
  64
  65 /* Split 64-bit integer into two 32-bit values. Use with %8.8_x%8.8_x */
  66
  67 #define ACPI_FORMAT_UINT64(i)           ACPI_HIDWORD(i), ACPI_LODWORD(i)
  68
  69 #if ACPI_MACHINE_WIDTH == 64
  70 #define ACPI_FORMAT_NATIVE_UINT(i)      ACPI_FORMAT_UINT64(i)
  71 #else
  72 #define ACPI_FORMAT_NATIVE_UINT(i)      0, (i)
  73 #endif
  74
  75 /*
  76  * Macros for moving data around to/from buffers that are possibly unaligned.
  77  * If the hardware supports the transfer of unaligned data, just do the store.
  78  * Otherwise, we have to move one byte at a time.
  79  */
  80 #ifdef ACPI_BIG_ENDIAN
  81 /*
  82  * Macros for big-endian machines
  83  */
  84
  85 /* These macros reverse the bytes during the move, converting little-endian to big endian */
  86
  87                           /* Big Endian      <==        Little Endian */
  88                           /*  Hi...Lo                     Lo...Hi     */
  89 /* 16-bit source, 16/32/64 destination */
  90
  91 #define ACPI_MOVE_16_TO_16(d, s)        {((  u8 *)(void *)(d))[0] = ((u8 *)(void *)(s))[1];\
  92                                            ((  u8 *)(void *)(d))[1] = ((u8 *)(void *)(s))[0];}
  93
  94 #define ACPI_MOVE_16_TO_32(d, s)        {(*(u32 *)(void *)(d))=0;\
  95                                                            ((u8 *)(void *)(d))[2] = ((u8 *)(void *)(s))[1];\
  96                                                            ((u8 *)(void *)(d))[3] = ((u8 *)(void *)(s))[0];}
  97
  98 #define ACPI_MOVE_16_TO_64(d, s)        {(*(u64 *)(void *)(d))=0;\
  99                                                                          ((u8 *)(void *)(d))[6] = ((u8 *)(void *)(s))[1];\
 100                                                                          ((u8 *)(void *)(d))[7] = ((u8 *)(void *)(s))[0];}
 101
 102 /* 32-bit source, 16/32/64 destination */
 103
 104 #define ACPI_MOVE_32_TO_16(d, s)        ACPI_MOVE_16_TO_16(d, s)        /* Truncate to 16 */
 105
 106 #define ACPI_MOVE_32_TO_32(d, s)        {((  u8 *)(void *)(d))[0] = ((u8 *)(void *)(s))[3];\
 107                                                                                  ((  u8 *)(void *)(d))[1] = ((u8 *)(void *)(s))[2];\
 108                                                                                  ((  u8 *)(void *)(d))[2] = ((u8 *)(void *)(s))[1];\
 109                                                                                  ((  u8 *)(void *)(d))[3] = ((u8 *)(void *)(s))[0];}
 110
 111 #define ACPI_MOVE_32_TO_64(d, s)        {(*(u64 *)(void *)(d))=0;\
 112                                                                                    ((u8 *)(void *)(d))[4] = ((u8 *)(void *)(s))[3];\
 113                                                                                    ((u8 *)(void *)(d))[5] = ((u8 *)(void *)(s))[2];\
 114                                                                                    ((u8 *)(void *)(d))[6] = ((u8 *)(void *)(s))[1];\
 115                                                                                    ((u8 *)(void *)(d))[7] = ((u8 *)(void *)(s))[0];}
 116
 117 /* 64-bit source, 16/32/64 destination */
 118
 119 #define ACPI_MOVE_64_TO_16(d, s)        ACPI_MOVE_16_TO_16(d, s)        /* Truncate to 16 */
 120
 121 #define ACPI_MOVE_64_TO_32(d, s)        ACPI_MOVE_32_TO_32(d, s)        /* Truncate to 32 */
 122
 123 #define ACPI_MOVE_64_TO_64(d, s)        {((  u8 *)(void *)(d))[0] = ((u8 *)(void *)(s))[7];\
 124                                                                                  ((  u8 *)(void *)(d))[1] = ((u8 *)(void *)(s))[6];\
 125                                                                                  ((  u8 *)(void *)(d))[2] = ((u8 *)(void *)(s))[5];\
 126                                                                                  ((  u8 *)(void *)(d))[3] = ((u8 *)(void *)(s))[4];\
 127                                                                                  ((  u8 *)(void *)(d))[4] = ((u8 *)(void *)(s))[3];\
 128                                                                                  ((  u8 *)(void *)(d))[5] = ((u8 *)(void *)(s))[2];\
 129                                                                                  ((  u8 *)(void *)(d))[6] = ((u8 *)(void *)(s))[1];\
 130                                                                                  ((  u8 *)(void *)(d))[7] = ((u8 *)(void *)(s))[0];}
 131 #else
 132 /*
 133  * Macros for little-endian machines
 134  */
 135
 136 #ifndef ACPI_MISALIGNMENT_NOT_SUPPORTED
 137
 138 /* The hardware supports unaligned transfers, just do the little-endian move */
 139
 140 /* 16-bit source, 16/32/64 destination */
 141
 142 #define ACPI_MOVE_16_TO_16(d, s)        *(u16 *)(void *)(d) = *(u16 *)(void *)(s)
 143 #define ACPI_MOVE_16_TO_32(d, s)        *(u32 *)(void *)(d) = *(u16 *)(void *)(s)
 144 #define ACPI_MOVE_16_TO_64(d, s)        *(u64 *)(void *)(d) = *(u16 *)(void *)(s)
 145
 146 /* 32-bit source, 16/32/64 destination */
 147
 148 #define ACPI_MOVE_32_TO_16(d, s)        ACPI_MOVE_16_TO_16(d, s)        /* Truncate to 16 */
 149 #define ACPI_MOVE_32_TO_32(d, s)        *(u32 *)(void *)(d) = *(u32 *)(void *)(s)
 150 #define ACPI_MOVE_32_TO_64(d, s)        *(u64 *)(void *)(d) = *(u32 *)(void *)(s)
 151
 152 /* 64-bit source, 16/32/64 destination */
 153
 154 #define ACPI_MOVE_64_TO_16(d, s)        ACPI_MOVE_16_TO_16(d, s)        /* Truncate to 16 */
 155 #define ACPI_MOVE_64_TO_32(d, s)        ACPI_MOVE_32_TO_32(d, s)        /* Truncate to 32 */
 156 #define ACPI_MOVE_64_TO_64(d, s)        *(u64 *)(void *)(d) = *(u64 *)(void *)(s)
 157
 158 #else
 159 /*
 160  * The hardware does not support unaligned transfers. We must move the
 161  * data one byte at a time. These macros work whether the source or
 162  * the destination (or both) is/are unaligned. (Little-endian move)
 163  */
 164
 165 /* 16-bit source, 16/32/64 destination */
 166
 167 #define ACPI_MOVE_16_TO_16(d, s)        {((  u8 *)(void *)(d))[0] = ((u8 *)(void *)(s))[0];\
 168                                                                                  ((  u8 *)(void *)(d))[1] = ((u8 *)(void *)(s))[1];}
 169
 170 #define ACPI_MOVE_16_TO_32(d, s)        {(*(u32 *)(void *)(d)) = 0; ACPI_MOVE_16_TO_16(d, s);}
 171 #define ACPI_MOVE_16_TO_64(d, s)        {(*(u64 *)(void *)(d)) = 0; ACPI_MOVE_16_TO_16(d, s);}
 172
 173 /* 32-bit source, 16/32/64 destination */
 174
 175 #define ACPI_MOVE_32_TO_16(d, s)        ACPI_MOVE_16_TO_16(d, s)        /* Truncate to 16 */
 176
 177 #define ACPI_MOVE_32_TO_32(d, s)        {((  u8 *)(void *)(d))[0] = ((u8 *)(void *)(s))[0];\
 178                                                                                  ((  u8 *)(void *)(d))[1] = ((u8 *)(void *)(s))[1];\
 179                                                                                  ((  u8 *)(void *)(d))[2] = ((u8 *)(void *)(s))[2];\
 180                                                                                  ((  u8 *)(void *)(d))[3] = ((u8 *)(void *)(s))[3];}
 181
 182 #define ACPI_MOVE_32_TO_64(d, s)        {(*(u64 *)(void *)(d)) = 0; ACPI_MOVE_32_TO_32(d, s);}
 183
 184 /* 64-bit source, 16/32/64 destination */
 185
 186 #define ACPI_MOVE_64_TO_16(d, s)        ACPI_MOVE_16_TO_16(d, s)        /* Truncate to 16 */
 187 #define ACPI_MOVE_64_TO_32(d, s)        ACPI_MOVE_32_TO_32(d, s)        /* Truncate to 32 */
 188 #define ACPI_MOVE_64_TO_64(d, s)        {((  u8 *)(void *)(d))[0] = ((u8 *)(void *)(s))[0];\
 189                                                                                  ((  u8 *)(void *)(d))[1] = ((u8 *)(void *)(s))[1];\
 190                                                                                  ((  u8 *)(void *)(d))[2] = ((u8 *)(void *)(s))[2];\
 191                                                                                  ((  u8 *)(void *)(d))[3] = ((u8 *)(void *)(s))[3];\
 192                                                                                  ((  u8 *)(void *)(d))[4] = ((u8 *)(void *)(s))[4];\
 193                                                                                  ((  u8 *)(void *)(d))[5] = ((u8 *)(void *)(s))[5];\
 194                                                                                  ((  u8 *)(void *)(d))[6] = ((u8 *)(void *)(s))[6];\
 195                                                                                  ((  u8 *)(void *)(d))[7] = ((u8 *)(void *)(s))[7];}
 196 #endif
 197 #endif
 198
 199 /* Macros based on machine integer width */
 200
 201 #if ACPI_MACHINE_WIDTH == 32
 202 #define ACPI_MOVE_SIZE_TO_16(d, s)       ACPI_MOVE_32_TO_16(d, s)
 203
 204 #elif ACPI_MACHINE_WIDTH == 64
 205 #define ACPI_MOVE_SIZE_TO_16(d, s)       ACPI_MOVE_64_TO_16(d, s)
 206
 207 #else
 208 #error unknown ACPI_MACHINE_WIDTH
 209 #endif
 210
 211 /*
 212  * Fast power-of-two math macros for non-optimized compilers
 213  */
 214 #define _ACPI_DIV(value, power_of2)      ((u32) ((value) >> (power_of2)))
 215 #define _ACPI_MUL(value, power_of2)      ((u32) ((value) << (power_of2)))
 216 #define _ACPI_MOD(value, divisor)        ((u32) ((value) & ((divisor) -1)))
 217
 218 #define ACPI_DIV_2(a)                   _ACPI_DIV(a, 1)
 219 #define ACPI_MUL_2(a)                   _ACPI_MUL(a, 1)
 220 #define ACPI_MOD_2(a)                   _ACPI_MOD(a, 2)
 221
 222 #define ACPI_DIV_4(a)                   _ACPI_DIV(a, 2)
 223 #define ACPI_MUL_4(a)                   _ACPI_MUL(a, 2)
 224 #define ACPI_MOD_4(a)                   _ACPI_MOD(a, 4)
 225
 226 #define ACPI_DIV_8(a)                   _ACPI_DIV(a, 3)
 227 #define ACPI_MUL_8(a)                   _ACPI_MUL(a, 3)
 228 #define ACPI_MOD_8(a)                   _ACPI_MOD(a, 8)
 229
 230 #define ACPI_DIV_16(a)                  _ACPI_DIV(a, 4)
 231 #define ACPI_MUL_16(a)                  _ACPI_MUL(a, 4)
 232 #define ACPI_MOD_16(a)                  _ACPI_MOD(a, 16)
 233
 234 #define ACPI_DIV_32(a)                  _ACPI_DIV(a, 5)
 235 #define ACPI_MUL_32(a)                  _ACPI_MUL(a, 5)
 236 #define ACPI_MOD_32(a)                  _ACPI_MOD(a, 32)
 237
 238 /*
 239  * Rounding macros (Power of two boundaries only)
 240  */
 241 #define ACPI_ROUND_DOWN(value, boundary)     (((acpi_size)(value)) & \
 242                                                 (~(((acpi_size) boundary)-1)))
 243
 244 #define ACPI_ROUND_UP(value, boundary)       ((((acpi_size)(value)) + \
 245                                                 (((acpi_size) boundary)-1)) & \
 246                                                 (~(((acpi_size) boundary)-1)))
 247
 248 /* Note: sizeof(acpi_size) evaluates to either 4 or 8 (32- vs 64-bit mode) */
 249
 250 #define ACPI_ROUND_DOWN_TO_32BIT(a)         ACPI_ROUND_DOWN(a, 4)
 251 #define ACPI_ROUND_DOWN_TO_64BIT(a)         ACPI_ROUND_DOWN(a, 8)
 252 #define ACPI_ROUND_DOWN_TO_NATIVE_WORD(a)   ACPI_ROUND_DOWN(a, sizeof(acpi_size))
 253
 254 #define ACPI_ROUND_UP_TO_32BIT(a)           ACPI_ROUND_UP(a, 4)
 255 #define ACPI_ROUND_UP_TO_64BIT(a)           ACPI_ROUND_UP(a, 8)
 256 #define ACPI_ROUND_UP_TO_NATIVE_WORD(a)     ACPI_ROUND_UP(a, sizeof(acpi_size))
 257
 258 #define ACPI_ROUND_BITS_UP_TO_BYTES(a)      ACPI_DIV_8((a) + 7)
 259 #define ACPI_ROUND_BITS_DOWN_TO_BYTES(a)    ACPI_DIV_8((a))
 260
 261 #define ACPI_ROUND_UP_TO_1K(a)              (((a) + 1023) >> 10)
 262
 263 /* Generic (non-power-of-two) rounding */
 264
 265 #define ACPI_ROUND_UP_TO(value, boundary)   (((value) + ((boundary)-1)) / (boundary))
 266
 267 #define ACPI_IS_MISALIGNED(value)           (((acpi_size) value) & (sizeof(acpi_size)-1))
 268
 269 /*
 270  * Bitmask creation
 271  * Bit positions start at zero.
 272  * MASK_BITS_ABOVE creates a mask starting AT the position and above
 273  * MASK_BITS_BELOW creates a mask starting one bit BELOW the position
 274  */
 275 #define ACPI_MASK_BITS_ABOVE(position)      (~((ACPI_INTEGER_MAX) << ((u32) (position))))
 276 #define ACPI_MASK_BITS_BELOW(position)      ((ACPI_INTEGER_MAX) << ((u32) (position)))
 277
 278 /* Bitfields within ACPI registers */
 279
 280 #define ACPI_REGISTER_PREPARE_BITS(val, pos, mask)      ((val << pos) & mask)
 281 #define ACPI_REGISTER_INSERT_VALUE(reg, pos, mask, val)  reg = (reg & (~(mask))) | ACPI_REGISTER_PREPARE_BITS(val, pos, mask)
 282
 283 #define ACPI_INSERT_BITS(target, mask, source)          target = ((target & (~(mask))) | (source & mask))
 284
 285 /*
 286  * A struct acpi_namespace_node can appear in some contexts
 287  * where a pointer to a union acpi_operand_object can also
 288  * appear. This macro is used to distinguish them.
 289  *
 290  * The "Descriptor" field is the first field in both structures.
 291  */
 292 #define ACPI_GET_DESCRIPTOR_TYPE(d)     (((union acpi_descriptor *)(void *)(d))->common.descriptor_type)
 293 #define ACPI_SET_DESCRIPTOR_TYPE(d, t)  (((union acpi_descriptor *)(void *)(d))->common.descriptor_type = t)
 294
 295 /*
 296  * Macros for the master AML opcode table
 297  */
 298 #if defined (ACPI_DISASSEMBLER) || defined (ACPI_DEBUG_OUTPUT)
 299 #define ACPI_OP(name, Pargs, Iargs, obj_type, class, type, flags) \
 300         {name, (u32)(Pargs), (u32)(Iargs), (u32)(flags), obj_type, class, type}
 301 #else
 302 #define ACPI_OP(name, Pargs, Iargs, obj_type, class, type, flags) \
 303         {(u32)(Pargs), (u32)(Iargs), (u32)(flags), obj_type, class, type}
 304 #endif
 305
 306 #define ARG_TYPE_WIDTH                  5
 307 #define ARG_1(x)                        ((u32)(x))
 308 #define ARG_2(x)                        ((u32)(x) << (1 * ARG_TYPE_WIDTH))
 309 #define ARG_3(x)                        ((u32)(x) << (2 * ARG_TYPE_WIDTH))
 310 #define ARG_4(x)                        ((u32)(x) << (3 * ARG_TYPE_WIDTH))
 311 #define ARG_5(x)                        ((u32)(x) << (4 * ARG_TYPE_WIDTH))
 312 #define ARG_6(x)                        ((u32)(x) << (5 * ARG_TYPE_WIDTH))
 313
 314 #define ARGI_LIST1(a)                   (ARG_1(a))
 315 #define ARGI_LIST2(a, b)                (ARG_1(b)|ARG_2(a))
 316 #define ARGI_LIST3(a, b, c)             (ARG_1(c)|ARG_2(b)|ARG_3(a))
 317 #define ARGI_LIST4(a, b, c, d)          (ARG_1(d)|ARG_2(c)|ARG_3(b)|ARG_4(a))
 318 #define ARGI_LIST5(a, b, c, d, e)       (ARG_1(e)|ARG_2(d)|ARG_3(c)|ARG_4(b)|ARG_5(a))
 319 #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))
 320
 321 #define ARGP_LIST1(a)                   (ARG_1(a))
 322 #define ARGP_LIST2(a, b)                (ARG_1(a)|ARG_2(b))
 323 #define ARGP_LIST3(a, b, c)             (ARG_1(a)|ARG_2(b)|ARG_3(c))
 324 #define ARGP_LIST4(a, b, c, d)          (ARG_1(a)|ARG_2(b)|ARG_3(c)|ARG_4(d))
 325 #define ARGP_LIST5(a, b, c, d, e)       (ARG_1(a)|ARG_2(b)|ARG_3(c)|ARG_4(d)|ARG_5(e))
 326 #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))
 327
 328 #define GET_CURRENT_ARG_TYPE(list)      (list & ((u32) 0x1F))
 329 #define INCREMENT_ARG_LIST(list)        (list >>= ((u32) ARG_TYPE_WIDTH))
 330
 331 /*
 332  * Ascii error messages can be configured out
 333  */
 334 #ifndef ACPI_NO_ERROR_MESSAGES
 335
 336 /*
 337  * Error reporting. Callers module and line number are inserted by AE_INFO,
 338  * the plist contains a set of parens to allow variable-length lists.
 339  * These macros are used for both the debug and non-debug versions of the code.
 340  */
 341 #define ACPI_ERROR_NAMESPACE(s, e)      acpi_ns_report_error (AE_INFO, s, e);
 342 #define ACPI_ERROR_METHOD(s, n, p, e)   acpi_ns_report_method_error (AE_INFO, s, n, p, e);
 343
 344 #else
 345
 346 /* No error messages */
 347
 348 #define ACPI_ERROR_NAMESPACE(s, e)
 349 #define ACPI_ERROR_METHOD(s, n, p, e)
 350 #endif          /* ACPI_NO_ERROR_MESSAGES */
 351
 352 /*
 353  * Debug macros that are conditionally compiled
 354  */
 355 #ifdef ACPI_DEBUG_OUTPUT
 356
 357 /*
 358  * Function entry tracing
 359  */
 360 #ifdef CONFIG_ACPI_DEBUG_FUNC_TRACE
 361
 362 #define ACPI_FUNCTION_TRACE(a)          ACPI_FUNCTION_NAME(a) \
 363                           acpi_ut_trace(ACPI_DEBUG_PARAMETERS)
 364 #define ACPI_FUNCTION_TRACE_PTR(a, b)   ACPI_FUNCTION_NAME(a) \
 365                                            acpi_ut_trace_ptr(ACPI_DEBUG_PARAMETERS, (void *)b)
 366 #define ACPI_FUNCTION_TRACE_U32(a, b)   ACPI_FUNCTION_NAME(a) \
 367                                                          acpi_ut_trace_u32(ACPI_DEBUG_PARAMETERS, (u32)b)
 368 #define ACPI_FUNCTION_TRACE_STR(a, b)   ACPI_FUNCTION_NAME(a) \
 369                                                                           acpi_ut_trace_str(ACPI_DEBUG_PARAMETERS, (char *)b)
 370
 371 #define ACPI_FUNCTION_ENTRY()           acpi_ut_track_stack_ptr()
 372
 373 /*
 374  * Function exit tracing.
 375  * WARNING: These macros include a return statement. This is usually considered
 376  * bad form, but having a separate exit macro is very ugly and difficult to maintain.
 377  * One of the FUNCTION_TRACE macros above must be used in conjunction with these macros
 378  * so that "_AcpiFunctionName" is defined.
 379  *
 380  * Note: the DO_WHILE0 macro is used to prevent some compilers from complaining
 381  * about these constructs.
 382  */
 383 #ifdef ACPI_USE_DO_WHILE_0
 384 #define ACPI_DO_WHILE0(a)               do a while(0)
 385 #else
 386 #define ACPI_DO_WHILE0(a)               a
 387 #endif
 388
 389 #define return_VOID                     ACPI_DO_WHILE0 ({ \
 390                                                                                         acpi_ut_exit (ACPI_DEBUG_PARAMETERS); \
 391                                                                                         return;})
 392 /*
 393  * There are two versions of most of the return macros. The default version is
 394  * safer, since it avoids side-effects by guaranteeing that the argument will
 395  * not be evaluated twice.
 396  *
 397  * A less-safe version of the macros is provided for optional use if the
 398  * compiler uses excessive CPU stack (for example, this may happen in the
 399  * debug case if code optimzation is disabled.)
 400  */
 401 #ifndef ACPI_SIMPLE_RETURN_MACROS
 402
 403 #define return_ACPI_STATUS(s)           ACPI_DO_WHILE0 ({ \
 404                                                                                         register acpi_status _s = (s); \
 405                                                                                         acpi_ut_status_exit (ACPI_DEBUG_PARAMETERS, _s); \
 406                                                                                         return (_s); })
 407 #define return_PTR(s)                   ACPI_DO_WHILE0 ({ \
 408                                                                                         register void *_s = (void *) (s); \
 409                                                                                         acpi_ut_ptr_exit (ACPI_DEBUG_PARAMETERS, (u8 *) _s); \
 410                                                                                         return (_s); })
 411 #define return_VALUE(s)                 ACPI_DO_WHILE0 ({ \
 412                                                                                         register acpi_integer _s = (s); \
 413                                                                                         acpi_ut_value_exit (ACPI_DEBUG_PARAMETERS, _s); \
 414                                                                                         return (_s); })
 415 #define return_UINT8(s)                 ACPI_DO_WHILE0 ({ \
 416                                                                                         register u8 _s = (u8) (s); \
 417                                                                                         acpi_ut_value_exit (ACPI_DEBUG_PARAMETERS, (acpi_integer) _s); \
 418                                                                                         return (_s); })
 419 #define return_UINT32(s)                ACPI_DO_WHILE0 ({ \
 420                                                                                         register u32 _s = (u32) (s); \
 421                                                                                         acpi_ut_value_exit (ACPI_DEBUG_PARAMETERS, (acpi_integer) _s); \
 422                                                                                         return (_s); })
 423 #else                           /* Use original less-safe macros */
 424
 425 #define return_ACPI_STATUS(s)           ACPI_DO_WHILE0 ({ \
 426                                                                                         acpi_ut_status_exit (ACPI_DEBUG_PARAMETERS, (s)); \
 427                                                                                         return((s)); })
 428 #define return_PTR(s)                   ACPI_DO_WHILE0 ({ \
 429                                                                                         acpi_ut_ptr_exit (ACPI_DEBUG_PARAMETERS, (u8 *) (s)); \
 430                                                                                         return((s)); })
 431 #define return_VALUE(s)                 ACPI_DO_WHILE0 ({ \
 432                                                                                         acpi_ut_value_exit (ACPI_DEBUG_PARAMETERS, (acpi_integer) (s)); \
 433                                                                                         return((s)); })
 434 #define return_UINT8(s)                 return_VALUE(s)
 435 #define return_UINT32(s)                return_VALUE(s)
 436
 437 #endif                          /* ACPI_SIMPLE_RETURN_MACROS */
 438
 439 #else /* !CONFIG_ACPI_DEBUG_FUNC_TRACE */
 440
 441 #define ACPI_FUNCTION_TRACE(a)
 442 #define ACPI_FUNCTION_TRACE_PTR(a,b)
 443 #define ACPI_FUNCTION_TRACE_U32(a,b)
 444 #define ACPI_FUNCTION_TRACE_STR(a,b)
 445 #define ACPI_FUNCTION_EXIT
 446 #define ACPI_FUNCTION_STATUS_EXIT(s)
 447 #define ACPI_FUNCTION_VALUE_EXIT(s)
 448 #define ACPI_FUNCTION_TRACE(a)
 449 #define ACPI_FUNCTION_ENTRY()
 450
 451 #define return_VOID                     return
 452 #define return_ACPI_STATUS(s)           return(s)
 453 #define return_VALUE(s)                 return(s)
 454 #define return_UINT8(s)                 return(s)
 455 #define return_UINT32(s)                return(s)
 456 #define return_PTR(s)                   return(s)
 457
 458 #endif /* CONFIG_ACPI_DEBUG_FUNC_TRACE */
 459
 460 /* Conditional execution */
 461
 462 #define ACPI_DEBUG_EXEC(a)              a
 463 #define ACPI_NORMAL_EXEC(a)
 464
 465 #define ACPI_DEBUG_DEFINE(a)            a;
 466 #define ACPI_DEBUG_ONLY_MEMBERS(a)      a;
 467 #define _VERBOSE_STRUCTURES
 468
 469 /* Stack and buffer dumping */
 470
 471 #define ACPI_DUMP_STACK_ENTRY(a)        acpi_ex_dump_operand((a), 0)
 472 #define ACPI_DUMP_OPERANDS(a, b, c)     acpi_ex_dump_operands(a, b, c)
 473
 474 #define ACPI_DUMP_ENTRY(a, b)           acpi_ns_dump_entry (a, b)
 475 #define ACPI_DUMP_PATHNAME(a, b, c, d)  acpi_ns_dump_pathname(a, b, c, d)
 476 #define ACPI_DUMP_RESOURCE_LIST(a)      acpi_rs_dump_resource_list(a)
 477 #define ACPI_DUMP_BUFFER(a, b)          acpi_ut_dump_buffer((u8 *) a, b, DB_BYTE_DISPLAY, _COMPONENT)
 478
 479 #else
 480 /*
 481  * This is the non-debug case -- make everything go away,
 482  * leaving no executable debug code!
 483  */
 484 #define ACPI_DEBUG_EXEC(a)
 485 #define ACPI_NORMAL_EXEC(a)             a;
 486
 487 #define ACPI_DEBUG_DEFINE(a)            do { } while(0)
 488 #define ACPI_DEBUG_ONLY_MEMBERS(a)      do { } while(0)
 489 #define ACPI_FUNCTION_TRACE(a)          do { } while(0)
 490 #define ACPI_FUNCTION_TRACE_PTR(a, b)   do { } while(0)
 491 #define ACPI_FUNCTION_TRACE_U32(a, b)   do { } while(0)
 492 #define ACPI_FUNCTION_TRACE_STR(a, b)   do { } while(0)
 493 #define ACPI_FUNCTION_EXIT              do { } while(0)
 494 #define ACPI_FUNCTION_STATUS_EXIT(s)    do { } while(0)
 495 #define ACPI_FUNCTION_VALUE_EXIT(s)     do { } while(0)
 496 #define ACPI_FUNCTION_ENTRY()           do { } while(0)
 497 #define ACPI_DUMP_STACK_ENTRY(a)        do { } while(0)
 498 #define ACPI_DUMP_OPERANDS(a, b, c)     do { } while(0)
 499 #define ACPI_DUMP_ENTRY(a, b)           do { } while(0)
 500 #define ACPI_DUMP_TABLES(a, b)          do { } while(0)
 501 #define ACPI_DUMP_PATHNAME(a, b, c, d)  do { } while(0)
 502 #define ACPI_DUMP_RESOURCE_LIST(a)      do { } while(0)
 503 #define ACPI_DUMP_BUFFER(a, b)          do { } while(0)
 504
 505 #define return_VOID                     return
 506 #define return_ACPI_STATUS(s)           return(s)
 507 #define return_VALUE(s)                 return(s)
 508 #define return_UINT8(s)                 return(s)
 509 #define return_UINT32(s)                return(s)
 510 #define return_PTR(s)                   return(s)
 511
 512 #endif                          /* ACPI_DEBUG_OUTPUT */
 513
 514 /*
 515  * Some code only gets executed when the debugger is built in.
 516  * Note that this is entirely independent of whether the
 517  * DEBUG_PRINT stuff (set by ACPI_DEBUG_OUTPUT) is on, or not.
 518  */
 519 #ifdef ACPI_DEBUGGER
 520 #define ACPI_DEBUGGER_EXEC(a)           a
 521 #else
 522 #define ACPI_DEBUGGER_EXEC(a)
 523 #endif
 524
 525 #ifdef ACPI_DEBUG_OUTPUT
 526 /*
 527  * 1) Set name to blanks
 528  * 2) Copy the object name
 529  */
 530 #define ACPI_ADD_OBJECT_NAME(a,b)       ACPI_MEMSET (a->common.name, ' ', sizeof (a->common.name));\
 531                                                                                 ACPI_STRNCPY (a->common.name, acpi_gbl_ns_type_names[b], sizeof (a->common.name))
 532 #else
 533
 534 #define ACPI_ADD_OBJECT_NAME(a,b)
 535 #endif
 536
 537 /*
 538  * Memory allocation tracking (DEBUG ONLY)
 539  */
 540 #define ACPI_MEM_PARAMETERS         _COMPONENT, _acpi_module_name, __LINE__
 541
 542 #ifndef ACPI_DBG_TRACK_ALLOCATIONS
 543
 544 /* Memory allocation */
 545
 546 #ifndef ACPI_ALLOCATE
 547 #define ACPI_ALLOCATE(a)            acpi_ut_allocate((acpi_size)(a), ACPI_MEM_PARAMETERS)
 548 #endif
 549 #ifndef ACPI_ALLOCATE_ZEROED
 550 #define ACPI_ALLOCATE_ZEROED(a)     acpi_ut_allocate_zeroed((acpi_size)(a), ACPI_MEM_PARAMETERS)
 551 #endif
 552 #ifndef ACPI_FREE
 553 #define ACPI_FREE(a)                acpio_os_free(a)
 554 #endif
 555 #define ACPI_MEM_TRACKING(a)
 556
 557 #else
 558
 559 /* Memory allocation */
 560
 561 #define ACPI_ALLOCATE(a)            acpi_ut_allocate_and_track((acpi_size)(a), ACPI_MEM_PARAMETERS)
 562 #define ACPI_ALLOCATE_ZEROED(a)     acpi_ut_allocate_zeroed_and_track((acpi_size)(a), ACPI_MEM_PARAMETERS)
 563 #define ACPI_FREE(a)                acpi_ut_free_and_track(a, ACPI_MEM_PARAMETERS)
 564 #define ACPI_MEM_TRACKING(a)        a
 565
 566 #endif                          /* ACPI_DBG_TRACK_ALLOCATIONS */
 567
 568 /* Preemption point */
 569 #ifndef ACPI_PREEMPTION_POINT
 570 #define ACPI_PREEMPTION_POINT() /* no preemption */
 571 #endif
 572
 573 #endif                          /* ACMACROS_H */