acmacros.h

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/******************************************************************************
 *
 * Name: acmacros.h - C macros for the entire subsystem.
 *       $Revision: 115 $
 *
 *****************************************************************************/

/*
 *  Copyright (C) 2000 - 2002, R. Byron Moore
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef __ACMACROS_H__
#define __ACMACROS_H__


/*
 * Data manipulation macros
 */

#define ACPI_LOWORD(l)                  ((u16)(NATIVE_UINT)(l))
#define ACPI_HIWORD(l)                  ((u16)((((NATIVE_UINT)(l)) >> 16) & 0xFFFF))
#define ACPI_LOBYTE(l)                  ((u8)(u16)(l))
#define ACPI_HIBYTE(l)                  ((u8)((((u16)(l)) >> 8) & 0xFF))


#ifdef _IA16
/*
 * For 16-bit addresses, we have to assume that the upper 32 bits
 * are zero.
 */
#define ACPI_LODWORD(l)                 (l)
#define ACPI_HIDWORD(l)                 (0)

#define ACPI_GET_ADDRESS(a)             ((a).lo)
#define ACPI_STORE_ADDRESS(a,b)         {(a).hi=0;(a).lo=(b);}
#define ACPI_VALID_ADDRESS(a)           ((a).hi | (a).lo)

#else
#ifdef ACPI_NO_INTEGER64_SUPPORT
/*
 * acpi_integer is 32-bits, no 64-bit support on this platform
 */
#define ACPI_LODWORD(l)                 ((u32)(l))
#define ACPI_HIDWORD(l)                 (0)

#define ACPI_GET_ADDRESS(a)             (a)
#define ACPI_STORE_ADDRESS(a,b)         ((a)=(b))
#define ACPI_VALID_ADDRESS(a)           (a)

#else

/*
 * Full 64-bit address/integer on both 32-bit and 64-bit platforms
 */
#define ACPI_LODWORD(l)                 ((u32)(u64)(l))
#define ACPI_HIDWORD(l)                 ((u32)(((*(uint64_struct *)(&l))).hi))

#define ACPI_GET_ADDRESS(a)             (a)
#define ACPI_STORE_ADDRESS(a,b)         ((a)=(b))
#define ACPI_VALID_ADDRESS(a)           (a)
#endif
#endif

 /*
  * Extract a byte of data using a pointer.  Any more than a byte and we
  * get into potential aligment issues -- see the STORE macros below
  */
#define ACPI_GET8(addr)                 (*(u8*)(addr))

/* Pointer arithmetic */

#define ACPI_PTR_ADD(t,a,b)             (t *) ((char *)(a) + (b))
#define ACPI_PTR_DIFF(a,b)              (NATIVE_UINT) ((char *)(a) - (char *)(b))

/* Pointer/Integer type conversions */

#define ACPI_TO_POINTER(i)              ACPI_PTR_ADD (void,NULL,(NATIVE_UINT)i)
#define ACPI_TO_INTEGER(p)              ACPI_PTR_DIFF (p,NULL)
#define ACPI_OFFSET(d,o)                ((ACPI_SIZE) ACPI_TO_INTEGER (&(((d *)0)->o)))
#define ACPI_FADT_OFFSET(o)             ACPI_OFFSET (FADT_DESCRIPTOR, o)


#ifdef _IA16
#define ACPI_PHYSADDR_TO_PTR(i)         (void *)(i)
#define ACPI_PTR_TO_PHYSADDR(i)         (char *)(i)
#else
#define ACPI_PHYSADDR_TO_PTR(i)         ACPI_TO_POINTER(i)
#define ACPI_PTR_TO_PHYSADDR(i)         ACPI_TO_INTEGER(i)
#endif

/*
 * 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 _HW_ALIGNMENT_SUPPORT

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

#define ACPI_MOVE_UNALIGNED16_TO_16(d,s)    *(u16 *)(d) = *(u16 *)(s)
#define ACPI_MOVE_UNALIGNED32_TO_32(d,s)    *(u32 *)(d) = *(u32 *)(s)
#define ACPI_MOVE_UNALIGNED16_TO_32(d,s)    *(u32 *)(d) = *(u16 *)(s)
#define ACPI_MOVE_UNALIGNED64_TO_64(d,s)    *(u64 *)(d) = *(u64 *)(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.
 */

#define ACPI_MOVE_UNALIGNED16_TO_16(d,s)    {((u8 *)(d))[0] = ((u8 *)(s))[0];\
	  ((u8 *)(d))[1] = ((u8 *)(s))[1];}

#define ACPI_MOVE_UNALIGNED32_TO_32(d,s)    {((u8 *)(d))[0] = ((u8 *)(s))[0];\
			   ((u8 *)(d))[1] = ((u8 *)(s))[1];\
			   ((u8 *)(d))[2] = ((u8 *)(s))[2];\
			   ((u8 *)(d))[3] = ((u8 *)(s))[3];}

#define ACPI_MOVE_UNALIGNED16_TO_32(d,s)    {(*(u32*)(d)) = 0; ACPI_MOVE_UNALIGNED16_TO_16(d,s);}

#define ACPI_MOVE_UNALIGNED64_TO_64(d,s)    {((u8 *)(d))[0] = ((u8 *)(s))[0];\
					 ((u8 *)(d))[1] = ((u8 *)(s))[1];\
					 ((u8 *)(d))[2] = ((u8 *)(s))[2];\
					 ((u8 *)(d))[3] = ((u8 *)(s))[3];\
					 ((u8 *)(d))[4] = ((u8 *)(s))[4];\
					 ((u8 *)(d))[5] = ((u8 *)(s))[5];\
					 ((u8 *)(d))[6] = ((u8 *)(s))[6];\
					 ((u8 *)(d))[7] = ((u8 *)(s))[7];}

#endif


/*
 * Fast power-of-two math macros for non-optimized compilers
 */

#define _ACPI_DIV(value,power_of2)      ((u32) ((value) >> (power_of2)))
#define _ACPI_MUL(value,power_of2)      ((u32) ((value) << (power_of2)))
#define _ACPI_MOD(value,divisor)        ((u32) ((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)


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

#define ACPI_ROUND_DOWN_TO_32_BITS(a)        ACPI_ROUND_DOWN(a,4)
#define ACPI_ROUND_DOWN_TO_64_BITS(a)        ACPI_ROUND_DOWN(a,8)
#define ACPI_ROUND_DOWN_TO_NATIVE_WORD(a)    ACPI_ROUND_DOWN(a,ALIGNED_ADDRESS_BOUNDARY)

#define ACPI_ROUND_UP_TO_32_bITS(a)          ACPI_ROUND_UP(a,4)
#define ACPI_ROUND_UP_TO_64_bITS(a)          ACPI_ROUND_UP(a,8)
#define ACPI_ROUND_UP_TO_NATIVE_WORD(a)      ACPI_ROUND_UP(a,ALIGNED_ADDRESS_BOUNDARY)


#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))

/*
 * 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
 */
#define ACPI_MASK_BITS_ABOVE(position)       (~(((acpi_integer)(-1)) << ((u32) (position))))
#define ACPI_MASK_BITS_BELOW(position)       (((acpi_integer)(-1)) << ((u32) (position)))

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

/* Macros for GAS addressing */

#ifndef _IA16

#define ACPI_PCI_DEVICE_MASK            (u64) 0x0000FFFF00000000
#define ACPI_PCI_FUNCTION_MASK          (u64) 0x00000000FFFF0000
#define ACPI_PCI_REGISTER_MASK          (u64) 0x000000000000FFFF

#define ACPI_PCI_FUNCTION(a)            (u16) ((((a) & ACPI_PCI_FUNCTION_MASK) >> 16))
#define ACPI_PCI_DEVICE(a)              (u16) ((((a) & ACPI_PCI_DEVICE_MASK) >> 32))
#define ACPI_PCI_REGISTER(a)            (u16) (((a) & ACPI_PCI_REGISTER_MASK))

#else

/* No support for GAS and PCI IDs in 16-bit mode  */

#define ACPI_PCI_FUNCTION(a)            (u16) ((a) & 0xFFFF0000)
#define ACPI_PCI_DEVICE(a)              (u16) ((a) & 0x0000FFFF)
#define ACPI_PCI_REGISTER(a)            (u16) ((a) & 0x0000FFFF)

#endif


/* 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)

/*
 * An acpi_namespace_node * can appear in some contexts,
 * where a pointer to an acpi_operand_object  can also
 * appear.  This macro is used to distinguish them.
 *
 * The "Descriptor" field is the first field in both structures.
 */
#define ACPI_GET_DESCRIPTOR_TYPE(d)     (((acpi_namespace_node *)d)->descriptor)
#define ACPI_SET_DESCRIPTOR_TYPE(d,t)   (((acpi_namespace_node *)d)->descriptor = t)


/* Macro to test the object type */

#define ACPI_GET_OBJECT_TYPE(d)         (((acpi_operand_object *)d)->common.type)

/* Macro to check the table flags for SINGLE or MULTIPLE tables are allowed */

#define ACPI_IS_SINGLE_TABLE(x)         (((x) & 0x01) == ACPI_TABLE_SINGLE ? 1 : 0)

/*
 * Macro to check if a pointer is within an ACPI table.
 * Parameter (a) is the pointer to check.  Parameter (b) must be defined
 * as a pointer to an acpi_table_header.  (b+1) then points past the header,
 * and ((u8 *)b+b->Length) points one byte past the end of the table.
 */
#ifndef _IA16
#define ACPI_IS_IN_ACPI_TABLE(a,b)      (((u8 *)(a) >= (u8 *)(b + 1)) &&\
							 ((u8 *)(a) < ((u8 *)b + b->length)))

#else
#define ACPI_IS_IN_ACPI_TABLE(a,b)      (_segment)(a) == (_segment)(b) &&\
									 (((u8 *)(a) >= (u8 *)(b + 1)) &&\
									 ((u8 *)(a) < ((u8 *)b + b->length)))
#endif

/*
 * Macros for the master AML opcode table
 */
#ifdef ACPI_DEBUG
#define ACPI_OP(name,Pargs,Iargs,obj_type,class,type,flags)    {name,Pargs,Iargs,flags,obj_type,class,type}
#else
#define ACPI_OP(name,Pargs,Iargs,obj_type,class,type,flags)    {Pargs,Iargs,flags,obj_type,class,type}
#endif

#define ARG_TYPE_WIDTH                  5
#define ARG_1(x)                        ((u32)(x))
#define ARG_2(x)                        ((u32)(x) << (1 * ARG_TYPE_WIDTH))