xref: /netbsd/sys/external/bsd/acpica/dist/include/acmacros.h (revision ec12a2fa)

/******************************************************************************
 *
 * Name: acmacros.h - C macros for the entire subsystem.
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2022, Intel Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

#ifndef __ACMACROS_H__
#define __ACMACROS_H__


/*
 * Extract data using a pointer. Any more than a byte and we
 * get into potential alignment issues -- see the STORE macros below.
 * Use with care.
 */
#define ACPI_CAST8(ptr)                 ACPI_CAST_PTR (UINT8, (ptr))
#define ACPI_CAST16(ptr)                ACPI_CAST_PTR (UINT16, (ptr))
#define ACPI_CAST32(ptr)                ACPI_CAST_PTR (UINT32, (ptr))
#define ACPI_CAST64(ptr)                ACPI_CAST_PTR (UINT64, (ptr))
#define ACPI_GET8(ptr)                  (*ACPI_CAST8 (ptr))
#define ACPI_GET16(ptr)                 (*ACPI_CAST16 (ptr))
#define ACPI_GET32(ptr)                 (*ACPI_CAST32 (ptr))
#define ACPI_GET64(ptr)                 (*ACPI_CAST64 (ptr))
#define ACPI_SET8(ptr, val)             (*ACPI_CAST8 (ptr) = (UINT8) (val))
#define ACPI_SET16(ptr, val)            (*ACPI_CAST16 (ptr) = (UINT16) (val))
#define ACPI_SET32(ptr, val)            (*ACPI_CAST32 (ptr) = (UINT32) (val))
#define ACPI_SET64(ptr, val)            (*ACPI_CAST64 (ptr) = (UINT64) (val))

/*
 * printf() format helper. This macro is a workaround for the difficulties
 * with emitting 64-bit integers and 64-bit pointers with the same code
 * for both 32-bit and 64-bit hosts.
 */
#define ACPI_FORMAT_UINT64(i)           ACPI_HIDWORD(i), ACPI_LODWORD(i)


/*
 * Macros for moving data around to/from buffers that are possibly unaligned.
 * If the hardware supports the transfer of unaligned data, just do the store.
 * Otherwise, we have to move one byte at a time.
 */
#ifdef ACPI_BIG_ENDIAN
/*
 * Macros for big-endian machines
 */

/* These macros reverse the bytes during the move, converting little-endian to big endian */

                                                     /* Big Endian      <==        Little Endian */
                                                     /*  Hi...Lo                     Lo...Hi     */
/* 16-bit source, 16/32/64 destination */

#define ACPI_MOVE_16_TO_16(d, s)        {((  UINT8 *)(void *)(d))[0] = ((const UINT8 *)(const void *)(s))[1];\
                                         ((  UINT8 *)(void *)(d))[1] = ((const UINT8 *)(const void *)(s))[0];}

#define ACPI_MOVE_16_TO_32(d, s)        {(*(UINT32 *)(void *)(d))=0;\
                                           ((UINT8 *)(void *)(d))[2] = ((const UINT8 *)(const void *)(s))[1];\
                                           ((UINT8 *)(void *)(d))[3] = ((const UINT8 *)(const void *)(s))[0];}

#define ACPI_MOVE_16_TO_64(d, s)        {(*(UINT64 *)(void *)(d))=0;\
                                           ((UINT8 *)(void *)(d))[6] = ((const UINT8 *)(const void *)(s))[1];\
                                           ((UINT8 *)(void *)(d))[7] = ((const UINT8 *)(const void *)(s))[0];}

/* 32-bit source, 16/32/64 destination */

#define ACPI_MOVE_32_TO_16(d, s)        ACPI_MOVE_16_TO_16(d, s)    /* Truncate to 16 */

#define ACPI_MOVE_32_TO_32(d, s)        {((  UINT8 *)(void *)(d))[0] = ((const UINT8 *)(const void *)(s))[3];\
                                         ((  UINT8 *)(void *)(d))[1] = ((const UINT8 *)(const void *)(s))[2];\
                                         ((  UINT8 *)(void *)(d))[2] = ((const UINT8 *)(const void *)(s))[1];\
                                         ((  UINT8 *)(void *)(d))[3] = ((const UINT8 *)(const void *)(s))[0];}

#define ACPI_MOVE_32_TO_64(d, s)        {(*(UINT64 *)(void *)(d))=0;\
                                           ((UINT8 *)(void *)(d))[4] = ((const UINT8 *)(const void *)(s))[3];\
                                           ((UINT8 *)(void *)(d))[5] = ((const UINT8 *)(const void *)(s))[2];\
                                           ((UINT8 *)(void *)(d))[6] = ((const UINT8 *)(const void *)(s))[1];\
                                           ((UINT8 *)(void *)(d))[7] = ((const UINT8 *)(const void *)(s))[0];}

/* 64-bit source, 16/32/64 destination */

#define ACPI_MOVE_64_TO_16(d, s)        ACPI_MOVE_16_TO_16(d, s)    /* Truncate to 16 */

#define ACPI_MOVE_64_TO_32(d, s)        ACPI_MOVE_32_TO_32(d, s)    /* Truncate to 32 */

#define ACPI_MOVE_64_TO_64(d, s)        {((  UINT8 *)(void *)(d))[0] = ((const UINT8 *)(const void *)(s))[7];\
                                         ((  UINT8 *)(void *)(d))[1] = ((const UINT8 *)(const void *)(s))[6];\
                                         ((  UINT8 *)(void *)(d))[2] = ((const UINT8 *)(const void *)(s))[5];\
                                         ((  UINT8 *)(void *)(d))[3] = ((const UINT8 *)(const void *)(s))[4];\
                                         ((  UINT8 *)(void *)(d))[4] = ((const UINT8 *)(const void *)(s))[3];\
                                         ((  UINT8 *)(void *)(d))[5] = ((const UINT8 *)(const void *)(s))[2];\
                                         ((  UINT8 *)(void *)(d))[6] = ((const UINT8 *)(const void *)(s))[1];\
                                         ((  UINT8 *)(void *)(d))[7] = ((const UINT8 *)(const void *)(s))[0];}
#else
/*
 * Macros for little-endian machines
 */

#ifndef ACPI_MISALIGNMENT_NOT_SUPPORTED

/* The hardware supports unaligned transfers, just do the little-endian move */

/* 16-bit source, 16/32/64 destination */

#define ACPI_MOVE_16_TO_16(d, s)        *(UINT16 *)(void *)(d) = *(const UINT16 *)(const void *)(s)
#define ACPI_MOVE_16_TO_32(d, s)        *(UINT32 *)(void *)(d) = *(const UINT16 *)(const void *)(s)
#define ACPI_MOVE_16_TO_64(d, s)        *(UINT64 *)(void *)(d) = *(const UINT16 *)(const void *)(s)

/* 32-bit source, 16/32/64 destination */

#define ACPI_MOVE_32_TO_16(d, s)        ACPI_MOVE_16_TO_16(d, s)    /* Truncate to 16 */
#define ACPI_MOVE_32_TO_32(d, s)        *(UINT32 *)(void *)(d) = *(const UINT32 *)(const void *)(s)
#define ACPI_MOVE_32_TO_64(d, s)        *(UINT64 *)(void *)(d) = *(const UINT32 *)(const void *)(s)

/* 64-bit source, 16/32/64 destination */

#define ACPI_MOVE_64_TO_16(d, s)        ACPI_MOVE_16_TO_16(d, s)    /* Truncate to 16 */
#define ACPI_MOVE_64_TO_32(d, s)        ACPI_MOVE_32_TO_32(d, s)    /* Truncate to 32 */
#define ACPI_MOVE_64_TO_64(d, s)        *(UINT64 *)(void *)(d) = *(const UINT64 *)(const void *)(s)

#else
/*
 * The hardware does not support unaligned transfers. We must move the
 * data one byte at a time. These macros work whether the source or
 * the destination (or both) is/are unaligned. (Little-endian move)
 */

/* 16-bit source, 16/32/64 destination */

#define ACPI_MOVE_16_TO_16(d, s)        {((  UINT8 *)(void *)(d))[0] = ((const UINT8 *)(const void *)(s))[0];\
                                         ((  UINT8 *)(void *)(d))[1] = ((const UINT8 *)(const void *)(s))[1];}

#define ACPI_MOVE_16_TO_32(d, s)        {(*(UINT32 *)(void *)(d)) = 0; ACPI_MOVE_16_TO_16(d, s);}
#define ACPI_MOVE_16_TO_64(d, s)        {(*(UINT64 *)(void *)(d)) = 0; ACPI_MOVE_16_TO_16(d, s);}

/* 32-bit source, 16/32/64 destination */

#define ACPI_MOVE_32_TO_16(d, s)        ACPI_MOVE_16_TO_16(d, s)    /* Truncate to 16 */

#define ACPI_MOVE_32_TO_32(d, s)        {((  UINT8 *)(void *)(d))[0] = ((const UINT8 *)(const void *)(s))[0];\
                                         ((  UINT8 *)(void *)(d))[1] = ((const UINT8 *)(const void *)(s))[1];\
                                         ((  UINT8 *)(void *)(d))[2] = ((const UINT8 *)(const void *)(s))[2];\
                                         ((  UINT8 *)(void *)(d))[3] = ((const UINT8 *)(const void *)(s))[3];}

#define ACPI_MOVE_32_TO_64(d, s)        {(*(UINT64 *)(void *)(d)) = 0; ACPI_MOVE_32_TO_32(d, s);}

/* 64-bit source, 16/32/64 destination */

#define ACPI_MOVE_64_TO_16(d, s)        ACPI_MOVE_16_TO_16(d, s)    /* Truncate to 16 */
#define ACPI_MOVE_64_TO_32(d, s)        ACPI_MOVE_32_TO_32(d, s)    /* Truncate to 32 */
#define ACPI_MOVE_64_TO_64(d, s)        {((  UINT8 *)(void *)(d))[0] = ((const UINT8 *)(const void *)(s))[0];\
                                         ((  UINT8 *)(void *)(d))[1] = ((const UINT8 *)(const void *)(s))[1];\
                                         ((  UINT8 *)(void *)(d))[2] = ((const UINT8 *)(const void *)(s))[2];\
                                         ((  UINT8 *)(void *)(d))[3] = ((const UINT8 *)(const void *)(s))[3];\
                                         ((  UINT8 *)(void *)(d))[4] = ((const UINT8 *)(const void *)(s))[4];\
                                         ((  UINT8 *)(void *)(d))[5] = ((const UINT8 *)(const void *)(s))[5];\
                                         ((  UINT8 *)(void *)(d))[6] = ((const UINT8 *)(const void *)(s))[6];\
                                         ((  UINT8 *)(void *)(d))[7] = ((const UINT8 *)(const void *)(s))[7];}
#endif
#endif


/*
 * Fast power-of-two math macros for non-optimized compilers
 */
#define _ACPI_DIV(value, PowerOf2)      ((UINT32) ((value) >> (PowerOf2)))
#define _ACPI_MUL(value, PowerOf2)      ((UINT32) ((value) << (PowerOf2)))
#define _ACPI_MOD(value, Divisor)       ((UINT32) ((value) & ((Divisor) -1)))

#define ACPI_DIV_2(a)                   _ACPI_DIV(a, 1)
#define ACPI_MUL_2(a)                   _ACPI_MUL(a, 1)
#define ACPI_MOD_2(a)                   _ACPI_MOD(a, 2)

#define ACPI_DIV_4(a)                   _ACPI_DIV(a, 2)
#define ACPI_MUL_4(a)                   _ACPI_MUL(a, 2)
#define ACPI_MOD_4(a)                   _ACPI_MOD(a, 4)

#define ACPI_DIV_8(a)                   _ACPI_DIV(a, 3)
#define ACPI_MUL_8(a)                   _ACPI_MUL(a, 3)
#define ACPI_MOD_8(a)                   _ACPI_MOD(a, 8)

#define ACPI_DIV_16(a)                  _ACPI_DIV(a, 4)
#define ACPI_MUL_16(a)                  _ACPI_MUL(a, 4)
#define ACPI_MOD_16(a)                  _ACPI_MOD(a, 16)

#define ACPI_DIV_32(a)                  _ACPI_DIV(a, 5)
#define ACPI_MUL_32(a)                  _ACPI_MUL(a, 5)
#define ACPI_MOD_32(a)                  _ACPI_MOD(a, 32)

/* Test for ASCII character */

#define ACPI_IS_ASCII(c)                ((c) < 0x80)

/* Signed integers */

#define ACPI_SIGN_POSITIVE              0
#define ACPI_SIGN_NEGATIVE              1


/*
 * Rounding macros (Power of two boundaries only)
 */
#define ACPI_ROUND_DOWN(value, boundary)    (((ACPI_SIZE)(value)) & \
                                                (~(((ACPI_SIZE) boundary)-1)))

#define ACPI_ROUND_UP(value, boundary)      ((((ACPI_SIZE)(value)) + \
                                                (((ACPI_SIZE) boundary)-1)) & \
                                                (~(((ACPI_SIZE) boundary)-1)))

/* Note: sizeof(ACPI_SIZE) evaluates to either 4 or 8 (32- vs 64-bit mode) */

#define ACPI_ROUND_DOWN_TO_32BIT(a)         ACPI_ROUND_DOWN(a, 4)
#define ACPI_ROUND_DOWN_TO_64BIT(a)         ACPI_ROUND_DOWN(a, 8)
#define ACPI_ROUND_DOWN_TO_NATIVE_WORD(a)   ACPI_ROUND_DOWN(a, sizeof(ACPI_SIZE))

#define ACPI_ROUND_UP_TO_32BIT(a)           ACPI_ROUND_UP(a, 4)
#define ACPI_ROUND_UP_TO_64BIT(a)           ACPI_ROUND_UP(a, 8)
#define ACPI_ROUND_UP_TO_NATIVE_WORD(a)     ACPI_ROUND_UP(a, sizeof(ACPI_SIZE))

#define ACPI_ROUND_BITS_UP_TO_BYTES(a)      ACPI_DIV_8((a) + 7)
#define ACPI_ROUND_BITS_DOWN_TO_BYTES(a)    ACPI_DIV_8((a))

#define ACPI_ROUND_UP_TO_1K(a)              (((a) + 1023) >> 10)

/* Generic (non-power-of-two) rounding */

#define ACPI_ROUND_UP_TO(value, boundary)   (((value) + ((boundary)-1)) / (boundary))

#define ACPI_IS_MISALIGNED(value)           (((ACPI_SIZE) value) & (sizeof(ACPI_SIZE)-1))

/* Generic bit manipulation */

#ifndef ACPI_USE_NATIVE_BIT_FINDER

#define __ACPI_FIND_LAST_BIT_2(a, r)        ((((UINT8)  (a)) & 0x02) ? (r)+1 : (r))
#define __ACPI_FIND_LAST_BIT_4(a, r)        ((((UINT8)  (a)) & 0x0C) ? \
                                             __ACPI_FIND_LAST_BIT_2  ((a)>>2,  (r)+2) : \
                                             __ACPI_FIND_LAST_BIT_2  ((a), (r)))
#define __ACPI_FIND_LAST_BIT_8(a, r)        ((((UINT8)  (a)) & 0xF0) ? \
                                             __ACPI_FIND_LAST_BIT_4  ((a)>>4,  (r)+4) : \
                                             __ACPI_FIND_LAST_BIT_4  ((a), (r)))
#define __ACPI_FIND_LAST_BIT_16(a, r)       ((((UINT16) (a)) & 0xFF00) ? \
                                             __ACPI_FIND_LAST_BIT_8  ((a)>>8,  (r)+8) : \
                                             __ACPI_FIND_LAST_BIT_8  ((a), (r)))
#define __ACPI_FIND_LAST_BIT_32(a, r)       ((((UINT32) (a)) & 0xFFFF0000) ? \
                                             __ACPI_FIND_LAST_BIT_16 ((a)>>16, (r)+16) : \
                                             __ACPI_FIND_LAST_BIT_16 ((a), (r)))
#define __ACPI_FIND_LAST_BIT_64(a, r)       ((((UINT64) (a)) & 0xFFFFFFFF00000000) ? \
                                             __ACPI_FIND_LAST_BIT_32 ((a)>>32, (r)+32) : \
                                             __ACPI_FIND_LAST_BIT_32 ((a), (r)))

#define ACPI_FIND_LAST_BIT_8(a)             ((a) ? __ACPI_FIND_LAST_BIT_8 (a, 1) : 0)
#define ACPI_FIND_LAST_BIT_16(a)            ((a) ? __ACPI_FIND_LAST_BIT_16 (a, 1) : 0)
#define ACPI_FIND_LAST_BIT_32(a)            ((a) ? __ACPI_FIND_LAST_BIT_32 (a, 1) : 0)
#define ACPI_FIND_LAST_BIT_64(a)            ((a) ? __ACPI_FIND_LAST_BIT_64 (a, 1) : 0)

#define __ACPI_FIND_FIRST_BIT_2(a, r)       ((((UINT8) (a)) & 0x01) ? (r) : (r)+1)
#define __ACPI_FIND_FIRST_BIT_4(a, r)       ((((UINT8) (a)) & 0x03) ? \
                                             __ACPI_FIND_FIRST_BIT_2  ((a), (r)) : \
                                             __ACPI_FIND_FIRST_BIT_2  ((a)>>2, (r)+2))
#define __ACPI_FIND_FIRST_BIT_8(a, r)       ((((UINT8) (a)) & 0x0F) ? \
                                             __ACPI_FIND_FIRST_BIT_4  ((a), (r)) : \
                                             __ACPI_FIND_FIRST_BIT_4  ((a)>>4, (r)+4))
#define __ACPI_FIND_FIRST_BIT_16(a, r)      ((((UINT16) (a)) & 0x00FF) ? \
                                             __ACPI_FIND_FIRST_BIT_8  ((a), (r)) : \
                                             __ACPI_FIND_FIRST_BIT_8  ((a)>>8, (r)+8))
#define __ACPI_FIND_FIRST_BIT_32(a, r)      ((((UINT32) (a)) & 0x0000FFFF) ? \
                                             __ACPI_FIND_FIRST_BIT_16 ((a), (r)) : \
                                             __ACPI_FIND_FIRST_BIT_16 ((a)>>16, (r)+16))
#define __ACPI_FIND_FIRST_BIT_64(a, r)      ((((UINT64) (a)) & 0x00000000FFFFFFFF) ? \
                                             __ACPI_FIND_FIRST_BIT_32 ((a), (r)) : \
                                             __ACPI_FIND_FIRST_BIT_32 ((a)>>32, (r)+32))

#define ACPI_FIND_FIRST_BIT_8(a)            ((a) ? __ACPI_FIND_FIRST_BIT_8 (a, 1) : 0)
#define ACPI_FIND_FIRST_BIT_16(a)           ((a) ? __ACPI_FIND_FIRST_BIT_16 (a, 1) : 0)
#define ACPI_FIND_FIRST_BIT_32(a)           ((a) ? __ACPI_FIND_FIRST_BIT_32 (a, 1) : 0)
#define ACPI_FIND_FIRST_BIT_64(a)           ((a) ? __ACPI_FIND_FIRST_BIT_64 (a, 1) : 0)

#endif /* ACPI_USE_NATIVE_BIT_FINDER */

/* Generic (power-of-two) rounding */

#define ACPI_ROUND_UP_POWER_OF_TWO_8(a)     ((UINT8) \
                                            (((UINT16) 1) <<  ACPI_FIND_LAST_BIT_8  ((a)  - 1)))
#define ACPI_ROUND_DOWN_POWER_OF_TWO_8(a)   ((UINT8) \
                                            (((UINT16) 1) << (ACPI_FIND_LAST_BIT_8  ((a)) - 1)))
#define ACPI_ROUND_UP_POWER_OF_TWO_16(a)    ((UINT16) \
                                            (((UINT32) 1) <<  ACPI_FIND_LAST_BIT_16 ((a)  - 1)))
#define ACPI_ROUND_DOWN_POWER_OF_TWO_16(a)  ((UINT16) \
                                            (((UINT32) 1) << (ACPI_FIND_LAST_BIT_16 ((a)) - 1)))
#define ACPI_ROUND_UP_POWER_OF_TWO_32(a)    ((UINT32) \
                                            (((UINT64) 1) <<  ACPI_FIND_LAST_BIT_32 ((a)  - 1)))
#define ACPI_ROUND_DOWN_POWER_OF_TWO_32(a)  ((UINT32) \
                                            (((UINT64) 1) << (ACPI_FIND_LAST_BIT_32 ((a)) - 1)))
#define ACPI_IS_ALIGNED(a, s)               (((a) & ((s) - 1)) == 0)
#define ACPI_IS_POWER_OF_TWO(a)             ACPI_IS_ALIGNED(a, a)

/*
 * Bitmask creation
 * Bit positions start at zero.
 * MASK_BITS_ABOVE creates a mask starting AT the position and above
 * MASK_BITS_BELOW creates a mask starting one bit BELOW the position
 * MASK_BITS_ABOVE/BELOW accepts a bit offset to create a mask
 * MASK_BITS_ABOVE/BELOW_32/64 accepts a bit width to create a mask
 * Note: The ACPI_INTEGER_BIT_SIZE check is used to bypass compiler
 * differences with the shift operator
 */
#define ACPI_MASK_BITS_ABOVE(position)      (~((ACPI_UINT64_MAX) << ((UINT32) (position))))
#define ACPI_MASK_BITS_BELOW(position)      ((ACPI_UINT64_MAX) << ((UINT32) (position)))
#define ACPI_MASK_BITS_ABOVE_32(width)      ((UINT32) ACPI_MASK_BITS_ABOVE(width))
#define ACPI_MASK_BITS_BELOW_32(width)      ((UINT32) ACPI_MASK_BITS_BELOW(width))
#define ACPI_MASK_BITS_ABOVE_64(width)      ((width) == ACPI_INTEGER_BIT_SIZE ? \
                                                ACPI_UINT64_MAX : \
                                                ACPI_MASK_BITS_ABOVE(width))
#define ACPI_MASK_BITS_BELOW_64(width)      ((width) == ACPI_INTEGER_BIT_SIZE ? \
                                                (UINT64) 0 : \
                                                ACPI_MASK_BITS_BELOW(width))

/* Bitfields within ACPI registers */

#define ACPI_REGISTER_PREPARE_BITS(Val, Pos, Mask) \
    ((Val << Pos) & Mask)

#define ACPI_REGISTER_INSERT_VALUE(Reg, Pos, Mask, Val) \
    Reg = (Reg & (~(Mask))) | ACPI_REGISTER_PREPARE_BITS(Val, Pos, Mask)

#define ACPI_INSERT_BITS(Target, Mask, Source) \
    Target = ((Target & (~(Mask))) | (Source & Mask))

/* Generic bitfield macros and masks */

#define ACPI_GET_BITS(SourcePtr, Position, Mask) \
    ((*(SourcePtr) >> (Position)) & (Mask))

#define ACPI_SET_BITS(TargetPtr, Position, Mask, Value) \
    (*(TargetPtr) |= (((Value) & (Mask)) << (Position)))

#define ACPI_1BIT_MASK      0x00000001
#define ACPI_2BIT_MASK      0x00000003
#define ACPI_3BIT_MASK      0x00000007
#define ACPI_4BIT_MASK      0x0000000F
#define ACPI_5BIT_MASK      0x0000001F
#define ACPI_6BIT_MASK      0x0000003F
#define ACPI_7BIT_MASK      0x0000007F
#define ACPI_8BIT_MASK      0x000000FF
#define ACPI_16BIT_MASK     0x0000FFFF
#define ACPI_24BIT_MASK     0x00FFFFFF

/* Macros to extract flag bits from position zero */

#define ACPI_GET_1BIT_FLAG(Value)                   ((Value) & ACPI_1BIT_MASK)
#define ACPI_GET_2BIT_FLAG(Value)                   ((Value) & ACPI_2BIT_MASK)
#define ACPI_GET_3BIT_FLAG(Value)                   ((Value) & ACPI_3BIT_MASK)
#define ACPI_GET_4BIT_FLAG(Value)                   ((Value) & ACPI_4BIT_MASK)

/* Macros to extract flag bits from position one and above */

#define ACPI_EXTRACT_1BIT_FLAG(Field, Position)     (ACPI_GET_1BIT_FLAG ((Field) >> Position))
#define ACPI_EXTRACT_2BIT_FLAG(Field, Position)     (ACPI_GET_2BIT_FLAG ((Field) >> Position))
#define ACPI_EXTRACT_3BIT_FLAG(Field, Position)     (ACPI_GET_3BIT_FLAG ((Field) >> Position))
#define ACPI_EXTRACT_4BIT_FLAG(Field, Position)     (ACPI_GET_4BIT_FLAG ((Field) >> Position))

/* ACPI Pathname helpers */

#define ACPI_IS_ROOT_PREFIX(c)      ((c) == (UINT8) 0x5C) /* Backslash */
#define ACPI_IS_PARENT_PREFIX(c)    ((c) == (UINT8) 0x5E) /* Carat */
#define ACPI_IS_PATH_SEPARATOR(c)   ((c) == (UINT8) 0x2E) /* Period (dot) */

/*
 * An object of type ACPI_NAMESPACE_NODE can appear in some contexts
 * where a pointer to an object of type ACPI_OPERAND_OBJECT can also
 * appear. This macro is used to distinguish them.
 *
 * The "DescriptorType" field is the second field in both structures.
 */
#define ACPI_GET_DESCRIPTOR_PTR(d)      (((ACPI_DESCRIPTOR *)(void *)(d))->Common.CommonPointer)
#define ACPI_SET_DESCRIPTOR_PTR(d, p)   (((ACPI_DESCRIPTOR *)(void *)(d))->Common.CommonPointer = (p))
#define ACPI_GET_DESCRIPTOR_TYPE(d)     (((ACPI_DESCRIPTOR *)(void *)(d))->Common.DescriptorType)
#define ACPI_SET_DESCRIPTOR_TYPE(d, t)  (((ACPI_DESCRIPTOR *)(void *)(d))->Common.DescriptorType = (t))

/*
 * Macros for the master AML opcode table
 */
#if defined (ACPI_DISASSEMBLER) || defined (ACPI_DEBUG_OUTPUT)
#define ACPI_OP(Name, PArgs, IArgs, ObjType, Class, Type, Flags) \
    {Name, (UINT32)(PArgs), (UINT32)(IArgs), (UINT32)(Flags), ObjType, Class, Type}
#else
#define ACPI_OP(Name, PArgs, IArgs, ObjType, Class, Type, Flags) \
    {(UINT32)(PArgs), (UINT32)(IArgs), (UINT32)(Flags), ObjType, Class, Type}
#endif

#define ARG_TYPE_WIDTH                  5
#define ARG_1(x)                        ((UINT32)(x))
#define ARG_2(x)                        ((UINT32)(x) << (1 * ARG_TYPE_WIDTH))
#define ARG_3(x)                        ((UINT32)(x) << (2 * ARG_TYPE_WIDTH))
#define ARG_4(x)                        ((UINT32)(x) << (3 * ARG_TYPE_WIDTH))
#define ARG_5(x)                        ((UINT32)(x) << (4 * ARG_TYPE_WIDTH))
#define ARG_6(x)                        ((UINT32)(x) << (5 * ARG_TYPE_WIDTH))

#define ARGI_LIST1(a)                   (ARG_1(a))
#define ARGI_LIST2(a, b)                (ARG_1(b)|ARG_2(a))
#define ARGI_LIST3(a, b, c)             (ARG_1(c)|ARG_2(b)|ARG_3(a))
#define ARGI_LIST4(a, b, c, d)          (ARG_1(d)|ARG_2(c)|ARG_3(b)|ARG_4(a))
#define ARGI_LIST5(a, b, c, d, e)       (ARG_1(e)|ARG_2(d)|ARG_3(c)|ARG_4(b)|ARG_5(a))
#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))

#define ARGP_LIST1(a)                   (ARG_1(a))
#define ARGP_LIST2(a, b)                (ARG_1(a)|ARG_2(b))
#define ARGP_LIST3(a, b, c)             (ARG_1(a)|ARG_2(b)|ARG_3(c))
#define ARGP_LIST4(a, b, c, d)          (ARG_1(a)|ARG_2(b)|ARG_3(c)|ARG_4(d))
#define ARGP_LIST5(a, b, c, d, e)       (ARG_1(a)|ARG_2(b)|ARG_3(c)|ARG_4(d)|ARG_5(e))
#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))

#define GET_CURRENT_ARG_TYPE(List)      (List & ((UINT32) 0x1F))
#define INCREMENT_ARG_LIST(List)        (List >>= ((UINT32) ARG_TYPE_WIDTH))

/*
 * Ascii error messages can be configured out
 */
#ifndef ACPI_NO_ERROR_MESSAGES
/*
 * Error reporting. The callers module and line number are inserted by AE_INFO,
 * the plist contains a set of parens to allow variable-length lists.
 * These macros are used for both the debug and non-debug versions of the code.
 */
#define ACPI_ERROR_NAMESPACE(s, p, e)       AcpiUtPrefixedNamespaceError (AE_INFO, s, p, e);
#define ACPI_ERROR_METHOD(s, n, p, e)       AcpiUtMethodError (AE_INFO, s, n, p, e);
#define ACPI_WARN_PREDEFINED(plist)         AcpiUtPredefinedWarning plist
#define ACPI_INFO_PREDEFINED(plist)         AcpiUtPredefinedInfo plist
#define ACPI_BIOS_ERROR_PREDEFINED(plist)   AcpiUtPredefinedBiosError plist
#define ACPI_ERROR_ONLY(s)                  s

#else

/* No error messages */

#define ACPI_ERROR_NAMESPACE(s, p, e)
#define ACPI_ERROR_METHOD(s, n, p, e)
#define ACPI_WARN_PREDEFINED(plist)
#define ACPI_INFO_PREDEFINED(plist)
#define ACPI_BIOS_ERROR_PREDEFINED(plist)
#define ACPI_ERROR_ONLY(s)

#endif /* ACPI_NO_ERROR_MESSAGES */

#if (!ACPI_REDUCED_HARDWARE)
#define ACPI_HW_OPTIONAL_FUNCTION(addr)     addr
#else
#define ACPI_HW_OPTIONAL_FUNCTION(addr)     NULL
#endif


/*
 * Macros used for ACPICA utilities only
 */

/* Generate a UUID */

#define ACPI_INIT_UUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
    (a) & 0xFF, ((a) >> 8) & 0xFF, ((a) >> 16) & 0xFF, ((a) >> 24) & 0xFF, \
    (b) & 0xFF, ((b) >> 8) & 0xFF, \
    (c) & 0xFF, ((c) >> 8) & 0xFF, \
    (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7)

#define ACPI_IS_OCTAL_DIGIT(d)              (((char)(d) >= '0') && ((char)(d) <= '7'))


/*
 * Macros used for the ASL-/ASL+ converter utility
 */
#ifdef ACPI_ASL_COMPILER

#define ASL_CV_LABEL_FILENODE(a)         CvLabelFileNode(a);
#define ASL_CV_CAPTURE_COMMENTS_ONLY(a)   CvCaptureCommentsOnly (a);
#define ASL_CV_CAPTURE_COMMENTS(a)       CvCaptureComments (a);
#define ASL_CV_TRANSFER_COMMENTS(a)      CvTransferComments (a);
#define ASL_CV_CLOSE_PAREN(a,b)          CvCloseParenWriteComment(a,b);
#define ASL_CV_CLOSE_BRACE(a,b)          CvCloseBraceWriteComment(a,b);
#define ASL_CV_SWITCH_FILES(a,b)         CvSwitchFiles(a,b);
#define ASL_CV_CLEAR_OP_COMMENTS(a)       CvClearOpComments(a);
#define ASL_CV_PRINT_ONE_COMMENT(a,b,c,d) CvPrintOneCommentType (a,b,c,d);
#define ASL_CV_PRINT_ONE_COMMENT_LIST(a,b) CvPrintOneCommentList (a,b);
#define ASL_CV_FILE_HAS_SWITCHED(a)       CvFileHasSwitched(a)
#define ASL_CV_INIT_FILETREE(a,b)      CvInitFileTree(a,b);

#else

#define ASL_CV_LABEL_FILENODE(a)
#define ASL_CV_CAPTURE_COMMENTS_ONLY(a)
#define ASL_CV_CAPTURE_COMMENTS(a)
#define ASL_CV_TRANSFER_COMMENTS(a)
#define ASL_CV_CLOSE_PAREN(a,b)          AcpiOsPrintf (")");
#define ASL_CV_CLOSE_BRACE(a,b)          AcpiOsPrintf ("}");
#define ASL_CV_SWITCH_FILES(a,b)
#define ASL_CV_CLEAR_OP_COMMENTS(a)
#define ASL_CV_PRINT_ONE_COMMENT(a,b,c,d)
#define ASL_CV_PRINT_ONE_COMMENT_LIST(a,b)
#define ASL_CV_FILE_HAS_SWITCHED(a)       0
#define ASL_CV_INIT_FILETREE(a,b)

#endif

#endif /* ACMACROS_H */