acmacros.h

内核linux2.4.20,可跟rtlinux3.2打补丁 组成实时linux系统,编译内核

/******************************************************************************
 *
 * Name: acmacros.h - C macros for the entire subsystem.
 *       $Revision: 97 $
 *
 *****************************************************************************/

/*
 *  Copyright (C) 2000, 2001 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
 */

#ifndef LOWORD
#define LOWORD(l)                       ((u16)(NATIVE_UINT)(l))
#endif

#ifndef HIWORD
#define HIWORD(l)                       ((u16)((((NATIVE_UINT)(l)) >> 16) & 0xFFFF))
#endif

#ifndef LOBYTE
#define LOBYTE(l)                       ((u8)(u16)(l))
#endif

#ifndef HIBYTE
#define HIBYTE(l)                       ((u8)((((u16)(l)) >> 8) & 0xFF))
#endif

#define BIT0(x)                         ((((x) & 0x01) > 0) ? 1 : 0)
#define BIT1(x)                         ((((x) & 0x02) > 0) ? 1 : 0)
#define BIT2(x)                         ((((x) & 0x04) > 0) ? 1 : 0)

#define BIT3(x)                         ((((x) & 0x08) > 0) ? 1 : 0)
#define BIT4(x)                         ((((x) & 0x10) > 0) ? 1 : 0)
#define BIT5(x)                         ((((x) & 0x20) > 0) ? 1 : 0)
#define BIT6(x)                         ((((x) & 0x40) > 0) ? 1 : 0)
#define BIT7(x)                         ((((x) & 0x80) > 0) ? 1 : 0)

#define LOW_BASE(w)                     ((u16) ((w) & 0x0000FFFF))
#define MID_BASE(b)                     ((u8) (((b) & 0x00FF0000) >> 16))
#define HI_BASE(b)                      ((u8) (((b) & 0xFF000000) >> 24))
#define LOW_LIMIT(w)                    ((u16) ((w) & 0x0000FFFF))
#define HI_LIMIT(b)                     ((u8) (((b) & 0x00FF0000) >> 16))


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

#ifndef HIDWORD
#define HIDWORD(l)                      (0)
#endif

#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
 */
#ifndef LODWORD
#define LODWORD(l)                      ((u32)(l))
#endif

#ifndef HIDWORD
#define HIDWORD(l)                      (0)
#endif

#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
 */
#ifndef LODWORD
#define LODWORD(l)                      ((u32)(u64)(l))
#endif

#ifndef HIDWORD
#define HIDWORD(l)                      ((u32)(((*(uint64_struct *)(&l))).hi))
#endif

#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 GET8(addr)                      (*(u8*)(addr))

/* Pointer arithmetic */


#define POINTER_ADD(t,a,b)              (t *) ((NATIVE_UINT)(a) + (NATIVE_UINT)(b))
#define POINTER_DIFF(a,b)               ((u32) ((NATIVE_UINT)(a) - (NATIVE_UINT)(b)))

/*
 * 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 MOVE_UNALIGNED16_TO_16(d,s)     *(u16*)(d) = *(u16*)(s)
#define MOVE_UNALIGNED32_TO_32(d,s)     *(u32*)(d) = *(u32*)(s)
#define MOVE_UNALIGNED16_TO_32(d,s)     *(u32*)(d) = *(u16*)(s)
#define 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 MOVE_UNALIGNED16_TO_16(d,s)     {((u8 *)(d))[0] = ((u8 *)(s))[0];\
	 ((u8 *)(d))[1] = ((u8 *)(s))[1];}

#define 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 MOVE_UNALIGNED16_TO_32(d,s)     {(*(u32*)(d)) = 0; MOVE_UNALIGNED16_TO_16(d,s);}

#define 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 _DIV(value,power_of2)           ((u32) ((value) >> (power_of2)))
#define _MUL(value,power_of2)           ((u32) ((value) << (power_of2)))
#define _MOD(value,divisor)             ((u32) ((value) & ((divisor) -1)))

#define DIV_2(a)                        _DIV(a,1)
#define MUL_2(a)                        _MUL(a,1)
#define MOD_2(a)                        _MOD(a,2)

#define DIV_4(a)                        _DIV(a,2)
#define MUL_4(a)                        _MUL(a,2)
#define MOD_4(a)                        _MOD(a,4)

#define DIV_8(a)                        _DIV(a,3)
#define MUL_8(a)                        _MUL(a,3)
#define MOD_8(a)                        _MOD(a,8)

#define DIV_16(a)                       _DIV(a,4)
#define MUL_16(a)                       _MUL(a,4)
#define MOD_16(a)                       _MOD(a,16)


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

#define ROUND_DOWN_TO_32_BITS(a)        ROUND_DOWN(a,4)
#define ROUND_DOWN_TO_64_BITS(a)        ROUND_DOWN(a,8)
#define ROUND_DOWN_TO_NATIVE_WORD(a)    ROUND_DOWN(a,ALIGNED_ADDRESS_BOUNDARY)

#define ROUND_UP_TO_32_bITS(a)          ROUND_UP(a,4)
#define ROUND_UP_TO_64_bITS(a)          ROUND_UP(a,8)
#define ROUND_UP_TO_NATIVE_WORD(a)      ROUND_UP(a,ALIGNED_ADDRESS_BOUNDARY)

#define ROUND_PTR_UP_TO_4(a,b)          ((b *)(((NATIVE_UINT)(a) + 3) & ~3))
#define ROUND_PTR_UP_TO_8(a,b)          ((b *)(((NATIVE_UINT)(a) + 7) & ~7))

#define ROUND_BITS_UP_TO_BYTES(a)       DIV_8((a) + 7)
#define ROUND_BITS_DOWN_TO_BYTES(a)     DIV_8((a))

#define ROUND_UP_TO_1K(a)               (((a) + 1023) >> 10)

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

#define 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 MASK_BITS_ABOVE(position)       (~(((u32)(-1)) << ((u32) (position))))
#define MASK_BITS_BELOW(position)       (((u32)(-1)) << ((u32) (position)))


/* 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

/*
 * An acpi_handle (which is actually an acpi_namespace_node *) can appear in some contexts,
 * such as on ap_obj_stack, where a pointer to an acpi_operand_object can also
 * appear.  This macro is used to distinguish them.
 *
 * The Data_type field is the first field in both structures.
 */
#define VALID_DESCRIPTOR_TYPE(d,t)      (((acpi_namespace_node *)d)->data_type == t)


/* Macro to test the object type */

#define IS_THIS_OBJECT_TYPE(d,t)        (((acpi_operand_object  *)d)->common.type == (u8)t)

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

#define 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 IS_IN_ACPI_TABLE(a,b)           (((u8 *)(a) >= (u8 *)(b + 1)) &&\
							   ((u8 *)(a) < ((u8 *)b + b->length)))

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

/*