/* * Copyright (c) 2004, Apple Computer, Inc. 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. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of * its contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS 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 APPLE OR ITS CONTRIBUTORS BE LIABLE FOR * ANY DIRECT, INDIRECT, INCIDENTAL, 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 DAMAGE. */ /* Copyright (c) 1991 NeXT Computer, Inc. All rights reserved. * * File: architecture/nrw/reg_help.h * Author: Mike DeMoney, NeXT Computer, Inc. * * This header file defines cpp macros useful for defining * machine register and doing machine-level operations. * * HISTORY * 23-Jan-91 Mike DeMoney (mike@next.com) * Created. */ #ifndef _NRW_REG_HELP_H_ #define _NRW_REG_HELP_H_ /* Bitfield definition aid */ #define BITS_WIDTH(msb, lsb) ((msb)-(lsb)+1) #define BIT_WIDTH(pos) (1) /* mostly to record the position */ /* Mask creation */ #define MKMASK(width, offset) (((unsigned)-1)>>(32-(width))<<(offset)) #define BITSMASK(msb, lsb) MKMASK(BITS_WIDTH(msb, lsb), lsb & 0x1f) #define BITMASK(pos) MKMASK(BIT_WIDTH(pos), pos & 0x1f) /* Register addresses */ #if __ASSEMBLER__ # define REG_ADDR(type, addr) (addr) #else /* __ASSEMBLER__ */ # define REG_ADDR(type, addr) (*(volatile type *)(addr)) #endif /* __ASSEMBLER__ */ /* Cast a register to be an unsigned */ #define CONTENTS(foo) (*(unsigned *) &(foo)) /* STRINGIFY -- perform all possible substitutions, then stringify */ #define __STR(x) #x /* just a helper macro */ #define STRINGIFY(x) __STR(x) #endif /* _NRW_REG_HELP_H_ */