xserver/hw/xfree86/common/compiler.h

/*
 * Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany.
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the name of Thomas Roell not be used in
 * advertising or publicity pertaining to distribution of the software without
 * specific, written prior permission.  Thomas Roell makes no representations
 * about the suitability of this software for any purpose.  It is provided
 * "as is" without express or implied warranty.
 *
 * THOMAS ROELL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL THOMAS ROELL BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 *
 */
/*
 * Copyright (c) 1994-2003 by The XFree86 Project, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Except as contained in this notice, the name of the copyright holder(s)
 * and author(s) shall not be used in advertising or otherwise to promote
 * the sale, use or other dealings in this Software without prior written
 * authorization from the copyright holder(s) and author(s).
 */

#ifndef _COMPILER_H

#define _COMPILER_H

#if defined(__SUNPRO_C)
#define DO_PROTOTYPES
#endif

/* Map Sun compiler platform defines to gcc-style used in the code */
#if defined(__amd64) && !defined(__amd64__)
#define __amd64__
#endif
#if defined(__i386) && !defined(__i386__)
#define __i386__
#endif
#if defined(__sparc) && !defined(__sparc__)
#define __sparc__
#endif
#if defined(__sparcv9) && !defined(__sparc64__)
#define __sparc64__
#endif

#ifndef _X_EXPORT
#include <X11/Xfuncproto.h>
#endif

#include <pixman.h>             /* for uint*_t types */

/* Allow drivers to use the GCC-supported __inline__ and/or __inline. */
#ifndef __inline__
#if defined(__GNUC__)
    /* gcc has __inline__ */
#else
#define __inline__ /**/
#endif
#endif                          /* __inline__ */
#ifndef __inline
#if defined(__GNUC__)
    /* gcc has __inline */
#else
#define __inline /**/
#endif
#endif                          /* __inline */
/* Support gcc's __FUNCTION__ for people using other compilers */
#if !defined(__GNUC__) && !defined(__FUNCTION__)
#define __FUNCTION__ __func__   /* C99 */
#endif

#if defined(DO_PROTOTYPES)
#if !defined(__arm__)
#if !defined(__sparc__) && !defined(__arm32__) && !defined(__nds32__) \
      && !(defined(__alpha__) && defined(__linux__)) \
      && !(defined(__ia64__) && defined(__linux__)) \
      && !(defined(__mips64) && defined(__linux__)) \

extern _X_EXPORT void outb(unsigned short, unsigned char);
extern _X_EXPORT void outw(unsigned short, unsigned short);
extern _X_EXPORT void outl(unsigned short, unsigned int);
extern _X_EXPORT unsigned int inb(unsigned short);
extern _X_EXPORT unsigned int inw(unsigned short);
extern _X_EXPORT unsigned int inl(unsigned short);

#else                           /* __sparc__,  __arm32__, __alpha__, __nds32__ */
extern _X_EXPORT void outb(unsigned long, unsigned char);
extern _X_EXPORT void outw(unsigned long, unsigned short);
extern _X_EXPORT void outl(unsigned long, unsigned int);
extern _X_EXPORT unsigned int inb(unsigned long);
extern _X_EXPORT unsigned int inw(unsigned long);
extern _X_EXPORT unsigned int inl(unsigned long);

#ifdef __SUNPRO_C
extern _X_EXPORT unsigned char  xf86ReadMmio8    (void *, unsigned long);
extern _X_EXPORT unsigned short xf86ReadMmio16Be (void *, unsigned long);
extern _X_EXPORT unsigned short xf86ReadMmio16Le (void *, unsigned long);
extern _X_EXPORT unsigned int   xf86ReadMmio32Be (void *, unsigned long);
extern _X_EXPORT unsigned int   xf86ReadMmio32Le (void *, unsigned long);
extern _X_EXPORT void xf86WriteMmio8    (void *, unsigned long, unsigned int);
extern _X_EXPORT void xf86WriteMmio16Be (void *, unsigned long, unsigned int);
extern _X_EXPORT void xf86WriteMmio16Le (void *, unsigned long, unsigned int);
extern _X_EXPORT void xf86WriteMmio32Be (void *, unsigned long, unsigned int);
extern _X_EXPORT void xf86WriteMmio32Le (void *, unsigned long, unsigned int);
#endif                          /* _SUNPRO_C */
#endif                          /* __sparc__,  __arm32__, __alpha__, __nds32__ */
#endif                          /* __arm__ */

#endif                          /* NO_INLINE || DO_PROTOTYPES */

#ifdef __GNUC__
#ifdef __i386__

#ifdef __SSE__
#define write_mem_barrier() __asm__ __volatile__ ("sfence" : : : "memory")
#else
#define write_mem_barrier() __asm__ __volatile__ ("lock; addl $0,0(%%esp)" : : : "memory")
#endif

#ifdef __SSE2__
#define mem_barrier() __asm__ __volatile__ ("mfence" : : : "memory")
#else
#define mem_barrier() __asm__ __volatile__ ("lock; addl $0,0(%%esp)" : : : "memory")
#endif

#elif defined __alpha__

#define mem_barrier() __asm__ __volatile__ ("mb" : : : "memory")
#define write_mem_barrier() __asm__ __volatile__ ("wmb" : : : "memory")

#elif defined __amd64__

#define mem_barrier() __asm__ __volatile__ ("mfence" : : : "memory")
#define write_mem_barrier() __asm__ __volatile__ ("sfence" : : : "memory")

#elif defined __ia64__

#ifndef __INTEL_COMPILER
#define mem_barrier()        __asm__ __volatile__ ("mf" : : : "memory")
#define write_mem_barrier()  __asm__ __volatile__ ("mf" : : : "memory")
#else
#include "ia64intrin.h"
#define mem_barrier() __mf()
#define write_mem_barrier() __mf()
#endif

#elif defined __mips__
     /* Note: sync instruction requires MIPS II instruction set */
#define mem_barrier()		\
	__asm__ __volatile__(		\
		".set   push\n\t"	\
		".set   noreorder\n\t"	\
		".set   mips2\n\t"	\
		"sync\n\t"		\
		".set   pop"		\
		: /* no output */	\
		: /* no input */	\
		: "memory")
#define write_mem_barrier() mem_barrier()

#elif defined __powerpc__

#ifndef eieio
#define eieio() __asm__ __volatile__ ("eieio" ::: "memory")
#endif                          /* eieio */
#define mem_barrier()	eieio()
#define write_mem_barrier()	eieio()

#elif defined __sparc__

#define barrier() __asm__ __volatile__ (".word 0x8143e00a" : : : "memory")
#define mem_barrier()           /* XXX: nop for now */
#define write_mem_barrier()     /* XXX: nop for now */
#endif
#endif                          /* __GNUC__ */

#ifndef barrier
#define barrier()
#endif

#ifndef mem_barrier
#define mem_barrier()           /* NOP */
#endif

#ifndef write_mem_barrier
#define write_mem_barrier()     /* NOP */
#endif

#ifdef __GNUC__
#if defined(__alpha__)

#ifdef __linux__
/* for Linux on Alpha, we use the LIBC _inx/_outx routines */
/* note that the appropriate setup via "ioperm" needs to be done */
/*  *before* any inx/outx is done. */

extern _X_EXPORT void _outb(unsigned char val, unsigned long port);
extern _X_EXPORT void _outw(unsigned short val, unsigned long port);
extern _X_EXPORT void _outl(unsigned int val, unsigned long port);
extern _X_EXPORT unsigned int _inb(unsigned long port);
extern _X_EXPORT unsigned int _inw(unsigned long port);
extern _X_EXPORT unsigned int _inl(unsigned long port);

static __inline__ void
outb(unsigned long port, unsigned char val)
{
    _outb(val, port);
}

static __inline__ void
outw(unsigned long port, unsigned short val)
{
    _outw(val, port);
}

static __inline__ void
outl(unsigned long port, unsigned int val)
{
    _outl(val, port);
}

static __inline__ unsigned int
inb(unsigned long port)
{
    return _inb(port);
}

static __inline__ unsigned int
inw(unsigned long port)
{
    return _inw(port);
}

static __inline__ unsigned int
inl(unsigned long port)
{
    return _inl(port);
}

#endif                          /* __linux__ */

#if (defined(__FreeBSD__) || defined(__OpenBSD__)) \
      && !defined(DO_PROTOTYPES)

/* for FreeBSD and OpenBSD on Alpha, we use the libio (resp. libalpha) */
/*  inx/outx routines */
/* note that the appropriate setup via "ioperm" needs to be done */
/*  *before* any inx/outx is done. */

extern _X_EXPORT void outb(unsigned int port, unsigned char val);
extern _X_EXPORT void outw(unsigned int port, unsigned short val);
extern _X_EXPORT void outl(unsigned int port, unsigned int val);
extern _X_EXPORT unsigned char inb(unsigned int port);
extern _X_EXPORT unsigned short inw(unsigned int port);
extern _X_EXPORT unsigned int inl(unsigned int port);

#endif                          /* (__FreeBSD__ || __OpenBSD__ ) && !DO_PROTOTYPES */

#if defined(__NetBSD__)
#include <machine/pio.h>
#endif                          /* __NetBSD__ */

#elif defined(__amd64__) || defined(__i386__) || defined(__ia64__)

#include <inttypes.h>

static __inline__ void
outb(unsigned short port, unsigned char val)
{
    __asm__ __volatile__("outb %0,%1"::"a"(val), "d"(port));
}

static __inline__ void
outw(unsigned short port, unsigned short val)
{
    __asm__ __volatile__("outw %0,%1"::"a"(val), "d"(port));
}

static __inline__ void
outl(unsigned short port, unsigned int val)
{
    __asm__ __volatile__("outl %0,%1"::"a"(val), "d"(port));
}

static __inline__ unsigned int
inb(unsigned short port)
{
    unsigned char ret;
    __asm__ __volatile__("inb %1,%0":"=a"(ret):"d"(port));

    return ret;
}

static __inline__ unsigned int
inw(unsigned short port)
{
    unsigned short ret;
    __asm__ __volatile__("inw %1,%0":"=a"(ret):"d"(port));

    return ret;
}

static __inline__ unsigned int
inl(unsigned short port)
{
    unsigned int ret;
    __asm__ __volatile__("inl %1,%0":"=a"(ret):"d"(port));

    return ret;
}

#elif defined(__sparc__)

#ifndef ASI_PL
#define ASI_PL 0x88
#endif

static __inline__ void
outb(unsigned long port, unsigned char val)
{
    __asm__ __volatile__("stba %0, [%1] %2":    /* No outputs */
                         :"r"(val), "r"(port), "i"(ASI_PL));

    barrier();
}

static __inline__ void
outw(unsigned long port, unsigned short val)
{
    __asm__ __volatile__("stha %0, [%1] %2":    /* No outputs */
                         :"r"(val), "r"(port), "i"(ASI_PL));

    barrier();
}

static __inline__ void
outl(unsigned long port, unsigned int val)
{
    __asm__ __volatile__("sta %0, [%1] %2":     /* No outputs */
                         :"r"(val), "r"(port), "i"(ASI_PL));

    barrier();
}

static __inline__ unsigned int
inb(unsigned long port)
{
    unsigned int ret;
    __asm__ __volatile__("lduba [%1] %2, %0":"=r"(ret)
                         :"r"(port), "i"(ASI_PL));

    return ret;
}

static __inline__ unsigned int
inw(unsigned long port)
{
    unsigned int ret;
    __asm__ __volatile__("lduha [%1] %2, %0":"=r"(ret)
                         :"r"(port), "i"(ASI_PL));

    return ret;
}

static __inline__ unsigned int
inl(unsigned long port)
{
    unsigned int ret;
    __asm__ __volatile__("lda [%1] %2, %0":"=r"(ret)
                         :"r"(port), "i"(ASI_PL));

    return ret;
}

static __inline__ unsigned char
xf86ReadMmio8(__volatile__ void *base, const unsigned long offset)
{
    unsigned long addr = ((unsigned long) base) + offset;
    unsigned char ret;

    __asm__ __volatile__("lduba [%1] %2, %0":"=r"(ret)
                         :"r"(addr), "i"(ASI_PL));

    return ret;
}

static __inline__ unsigned short
xf86ReadMmio16Be(__volatile__ void *base, const unsigned long offset)
{
    unsigned long addr = ((unsigned long) base) + offset;
    unsigned short ret;

    __asm__ __volatile__("lduh [%1], %0":"=r"(ret)
                         :"r"(addr));

    return ret;
}

static __inline__ unsigned short
xf86ReadMmio16Le(__volatile__ void *base, const unsigned long offset)
{
    unsigned long addr = ((unsigned long) base) + offset;
    unsigned short ret;

    __asm__ __volatile__("lduha [%1] %2, %0":"=r"(ret)
                         :"r"(addr), "i"(ASI_PL));

    return ret;
}

static __inline__ unsigned int
xf86ReadMmio32Be(__volatile__ void *base, const unsigned long offset)
{
    unsigned long addr = ((unsigned long) base) + offset;
    unsigned int ret;

    __asm__ __volatile__("ld [%1], %0":"=r"(ret)
                         :"r"(addr));

    return ret;
}

static __inline__ unsigned int
xf86ReadMmio32Le(__volatile__ void *base, const unsigned long offset)
{
    unsigned long addr = ((unsigned long) base) + offset;
    unsigned int ret;

    __asm__ __volatile__("lda [%1] %2, %0":"=r"(ret)
                         :"r"(addr), "i"(ASI_PL));

    return ret;
}

static __inline__ void
xf86WriteMmio8(__volatile__ void *base, const unsigned long offset,
               const unsigned int val)
{
    unsigned long addr = ((unsigned long) base) + offset;

    __asm__ __volatile__("stba %0, [%1] %2":    /* No outputs */
                         :"r"(val), "r"(addr), "i"(ASI_PL));

    barrier();
}

static __inline__ void
xf86WriteMmio16Be(__volatile__ void *base, const unsigned long offset,
                  const unsigned int val)
{
    unsigned long addr = ((unsigned long) base) + offset;

    __asm__ __volatile__("sth %0, [%1]":        /* No outputs */
                         :"r"(val), "r"(addr));

    barrier();
}

static __inline__ void
xf86WriteMmio16Le(__volatile__ void *base, const unsigned long offset,
                  const unsigned int val)
{
    unsigned long addr = ((unsigned long) base) + offset;

    __asm__ __volatile__("stha %0, [%1] %2":    /* No outputs */
                         :"r"(val), "r"(addr), "i"(ASI_PL));

    barrier();
}

static __inline__ void
xf86WriteMmio32Be(__volatile__ void *base, const unsigned long offset,
                  const unsigned int val)
{
    unsigned long addr = ((unsigned long) base) + offset;

    __asm__ __volatile__("st %0, [%1]": /* No outputs */
                         :"r"(val), "r"(addr));

    barrier();
}

static __inline__ void
xf86WriteMmio32Le(__volatile__ void *base, const unsigned long offset,
                  const unsigned int val)
{
    unsigned long addr = ((unsigned long) base) + offset;

    __asm__ __volatile__("sta %0, [%1] %2":     /* No outputs */
                         :"r"(val), "r"(addr), "i"(ASI_PL));

    barrier();
}

#elif defined(__arm32__) && !defined(__linux__)
#define PORT_SIZE long

extern _X_EXPORT unsigned int IOPortBase;      /* Memory mapped I/O port area */

static __inline__ void
outb(unsigned PORT_SIZE port, unsigned char val)
{
    *(volatile unsigned char *) (((unsigned PORT_SIZE) (port)) + IOPortBase) =
        val;
}

static __inline__ void
outw(unsigned PORT_SIZE port, unsigned short val)
{
    *(volatile unsigned short *) (((unsigned PORT_SIZE) (port)) + IOPortBase) =
        val;
}

static __inline__ void
outl(unsigned PORT_SIZE port, unsigned int val)
{
    *(volatile unsigned int *) (((unsigned PORT_SIZE) (port)) + IOPortBase) =
        val;
}

static __inline__ unsigned int
inb(unsigned PORT_SIZE port)
{
    return *(volatile unsigned char *) (((unsigned PORT_SIZE) (port)) +
                                        IOPortBase);
}

static __inline__ unsigned int
inw(unsigned PORT_SIZE port)
{
    return *(volatile unsigned short *) (((unsigned PORT_SIZE) (port)) +
                                         IOPortBase);
}

static __inline__ unsigned int
inl(unsigned PORT_SIZE port)
{
    return *(volatile unsigned int *) (((unsigned PORT_SIZE) (port)) +
                                       IOPortBase);
}

#if defined(__mips__)
#ifdef __linux__                    /* don't mess with other OSs */
#if X_BYTE_ORDER == X_BIG_ENDIAN
static __inline__ unsigned int
xf86ReadMmio32Be(__volatile__ void *base, const unsigned long offset)
{
    unsigned long addr = ((unsigned long) base) + offset;
    unsigned int ret;

    __asm__ __volatile__("lw %0, 0(%1)":"=r"(ret)
                         :"r"(addr));

    return ret;
}

static __inline__ void
xf86WriteMmio32Be(__volatile__ void *base, const unsigned long offset,
                  const unsigned int val)
{
    unsigned long addr = ((unsigned long) base) + offset;

    __asm__ __volatile__("sw %0, 0(%1)":        /* No outputs */
                         :"r"(val), "r"(addr));
}
#endif
#endif                          /* !__linux__ */
#endif                          /* __mips__ */

#elif defined(__powerpc__)

#ifndef MAP_FAILED
#define MAP_FAILED ((void *)-1)
#endif

extern _X_EXPORT volatile unsigned char *ioBase;

static __inline__ unsigned char
xf86ReadMmio8(__volatile__ void *base, const unsigned long offset)
{
    register unsigned char val;
    __asm__ __volatile__("lbzx %0,%1,%2\n\t" "eieio":"=r"(val)
                         :"b"(base), "r"(offset),
                         "m"(*((volatile unsigned char *) base + offset)));
    return val;
}

static __inline__ unsigned short
xf86ReadMmio16Be(__volatile__ void *base, const unsigned long offset)
{
    register unsigned short val;
    __asm__ __volatile__("lhzx %0,%1,%2\n\t" "eieio":"=r"(val)
                         :"b"(base), "r"(offset),
                         "m"(*((volatile unsigned char *) base + offset)));
    return val;
}

static __inline__ unsigned short
xf86ReadMmio16Le(__volatile__ void *base, const unsigned long offset)
{
    register unsigned short val;
    __asm__ __volatile__("lhbrx %0,%1,%2\n\t" "eieio":"=r"(val)
                         :"b"(base), "r"(offset),
                         "m"(*((volatile unsigned char *) base + offset)));
    return val;
}

static __inline__ unsigned int
xf86ReadMmio32Be(__volatile__ void *base, const unsigned long offset)
{
    register unsigned int val;
    __asm__ __volatile__("lwzx %0,%1,%2\n\t" "eieio":"=r"(val)
                         :"b"(base), "r"(offset),
                         "m"(*((volatile unsigned char *) base + offset)));
    return val;
}

static __inline__ unsigned int
xf86ReadMmio32Le(__volatile__ void *base, const unsigned long offset)
{
    register unsigned int val;
    __asm__ __volatile__("lwbrx %0,%1,%2\n\t" "eieio":"=r"(val)
                         :"b"(base), "r"(offset),
                         "m"(*((volatile unsigned char *) base + offset)));
    return val;
}

static __inline__ void
xf86WriteMmio8(__volatile__ void *base, const unsigned long offset,
               const unsigned char val)
{
    __asm__
        __volatile__("stbx %1,%2,%3\n\t":"=m"
                     (*((volatile unsigned char *) base + offset))
                     :"r"(val), "b"(base), "r"(offset));
    eieio();
}

static __inline__ void
xf86WriteMmio16Le(__volatile__ void *base, const unsigned long offset,
                  const unsigned short val)
{
    __asm__
        __volatile__("sthbrx %1,%2,%3\n\t":"=m"
                     (*((volatile unsigned char *) base + offset))
                     :"r"(val), "b"(base), "r"(offset));
    eieio();
}

static __inline__ void
xf86WriteMmio16Be(__volatile__ void *base, const unsigned long offset,
                  const unsigned short val)
{
    __asm__
        __volatile__("sthx %1,%2,%3\n\t":"=m"
                     (*((volatile unsigned char *) base + offset))
                     :"r"(val), "b"(base), "r"(offset));
    eieio();
}

static __inline__ void
xf86WriteMmio32Le(__volatile__ void *base, const unsigned long offset,
                  const unsigned int val)
{
    __asm__
        __volatile__("stwbrx %1,%2,%3\n\t":"=m"
                     (*((volatile unsigned char *) base + offset))
                     :"r"(val), "b"(base), "r"(offset));
    eieio();
}

static __inline__ void
xf86WriteMmio32Be(__volatile__ void *base, const unsigned long offset,
                  const unsigned int val)
{
    __asm__
        __volatile__("stwx %1,%2,%3\n\t":"=m"
                     (*((volatile unsigned char *) base + offset))
                     :"r"(val), "b"(base), "r"(offset));
    eieio();
}

static __inline__ void
outb(unsigned short port, unsigned char value)
{
    if (ioBase == MAP_FAILED)
        return;
    xf86WriteMmio8((void *) ioBase, port, value);
}

static __inline__ void
outw(unsigned short port, unsigned short value)
{
    if (ioBase == MAP_FAILED)
        return;
    xf86WriteMmio16Le((void *) ioBase, port, value);
}

static __inline__ void
outl(unsigned short port, unsigned int value)
{
    if (ioBase == MAP_FAILED)
        return;
    xf86WriteMmio32Le((void *) ioBase, port, value);
}

static __inline__ unsigned int
inb(unsigned short port)
{
    if (ioBase == MAP_FAILED)
        return 0;
    return xf86ReadMmio8((void *) ioBase, port);
}

static __inline__ unsigned int
inw(unsigned short port)
{
    if (ioBase == MAP_FAILED)
        return 0;
    return xf86ReadMmio16Le((void *) ioBase, port);
}

static __inline__ unsigned int
inl(unsigned short port)
{
    if (ioBase == MAP_FAILED)
        return 0;
    return xf86ReadMmio32Le((void *) ioBase, port);
}

#elif defined(__nds32__)

/*
 * Assume all port access are aligned.  We need to revise this implementation
 * if there is unaligned port access.
 */

#define PORT_SIZE long

static __inline__ unsigned char
xf86ReadMmio8(__volatile__ void *base, const unsigned long offset)
{
    return *(volatile unsigned char *) ((unsigned char *) base + offset);
}

static __inline__ void
xf86WriteMmio8(__volatile__ void *base, const unsigned long offset,
               const unsigned int val)
{
    *(volatile unsigned char *) ((unsigned char *) base + offset) = val;
    barrier();
}

static __inline__ unsigned short
xf86ReadMmio16Swap(__volatile__ void *base, const unsigned long offset)
{
    unsigned long addr = ((unsigned long) base) + offset;
    unsigned short ret;

    __asm__ __volatile__("lhi %0, [%1];\n\t" "wsbh %0, %0;\n\t":"=r"(ret)
                         :"r"(addr));

    return ret;
}

static __inline__ unsigned short
xf86ReadMmio16(__volatile__ void *base, const unsigned long offset)
{
    return *(volatile unsigned short *) ((char *) base + offset);
}

static __inline__ void
xf86WriteMmio16Swap(__volatile__ void *base, const unsigned long offset,
                    const unsigned int val)
{
    unsigned long addr = ((unsigned long) base) + offset;

    __asm__ __volatile__("wsbh %0, %0;\n\t" "shi %0, [%1];\n\t":        /* No outputs */
                         :"r"(val), "r"(addr));

    barrier();
}

static __inline__ void
xf86WriteMmio16(__volatile__ void *base, const unsigned long offset,
                const unsigned int val)
{
    *(volatile unsigned short *) ((unsigned char *) base + offset) = val;
    barrier();
}

static __inline__ unsigned int
xf86ReadMmio32Swap(__volatile__ void *base, const unsigned long offset)
{
    unsigned long addr = ((unsigned long) base) + offset;
    unsigned int ret;

    __asm__ __volatile__("lwi %0, [%1];\n\t"
                         "wsbh %0, %0;\n\t" "rotri %0, %0, 16;\n\t":"=r"(ret)
                         :"r"(addr));

    return ret;
}

static __inline__ unsigned int
xf86ReadMmio32(__volatile__ void *base, const unsigned long offset)
{
    return *(volatile unsigned int *) ((unsigned char *) base + offset);
}

static __inline__ void
xf86WriteMmio32Swap(__volatile__ void *base, const unsigned long offset,
                    const unsigned int val)
{
    unsigned long addr = ((unsigned long) base) + offset;

    __asm__ __volatile__("wsbh %0, %0;\n\t" "rotri %0, %0, 16;\n\t" "swi %0, [%1];\n\t":        /* No outputs */
                         :"r"(val), "r"(addr));

    barrier();
}

static __inline__ void
xf86WriteMmio32(__volatile__ void *base, const unsigned long offset,
                const unsigned int val)
{
    *(volatile unsigned int *) ((unsigned char *) base + offset) = val;
    barrier();
}

#if defined(NDS32_MMIO_SWAP)
static __inline__ void
outb(unsigned PORT_SIZE port, unsigned char val)
{
    xf86WriteMmio8(IOPortBase, port, val);
}

static __inline__ void
outw(unsigned PORT_SIZE port, unsigned short val)
{
    xf86WriteMmio16Swap(IOPortBase, port, val);
}

static __inline__ void
outl(unsigned PORT_SIZE port, unsigned int val)
{
    xf86WriteMmio32Swap(IOPortBase, port, val);
}

static __inline__ unsigned int
inb(unsigned PORT_SIZE port)
{
    return xf86ReadMmio8(IOPortBase, port);
}

static __inline__ unsigned int
inw(unsigned PORT_SIZE port)
{
    return xf86ReadMmio16Swap(IOPortBase, port);
}

static __inline__ unsigned int
inl(unsigned PORT_SIZE port)
{
    return xf86ReadMmio32Swap(IOPortBase, port);
}

#else                           /* !NDS32_MMIO_SWAP */
static __inline__ void
outb(unsigned PORT_SIZE port, unsigned char val)
{
    *(volatile unsigned char *) (((unsigned PORT_SIZE) (port))) = val;
    barrier();
}

static __inline__ void
outw(unsigned PORT_SIZE port, unsigned short val)
{
    *(volatile unsigned short *) (((unsigned PORT_SIZE) (port))) = val;
    barrier();
}

static __inline__ void
outl(unsigned PORT_SIZE port, unsigned int val)
{
    *(volatile unsigned int *) (((unsigned PORT_SIZE) (port))) = val;
    barrier();
}

static __inline__ unsigned int
inb(unsigned PORT_SIZE port)
{
    return *(volatile unsigned char *) (((unsigned PORT_SIZE) (port)));
}

static __inline__ unsigned int
inw(unsigned PORT_SIZE port)
{
    return *(volatile unsigned short *) (((unsigned PORT_SIZE) (port)));
}

static __inline__ unsigned int
inl(unsigned PORT_SIZE port)
{
    return *(volatile unsigned int *) (((unsigned PORT_SIZE) (port)));
}

#endif                          /* NDS32_MMIO_SWAP */

#endif                          /* arch madness */

#else                           /* !GNUC */
#if defined(__STDC__) && (__STDC__ == 1)
#ifndef asm
#define asm __asm
#endif
#endif
#if !defined(__SUNPRO_C)
#include <sys/inline.h>
#endif
#endif                          /* __GNUC__ */

#if !defined(MMIO_IS_BE) && \
    (defined(SPARC_MMIO_IS_BE) || defined(PPC_MMIO_IS_BE))
#define MMIO_IS_BE
#endif

#ifdef __alpha__
static inline int
xf86ReadMmio8(void *Base, unsigned long Offset)
{
    mem_barrier();
    return *(CARD8 *) ((unsigned long) Base + (Offset));
}

static inline int
xf86ReadMmio16(void *Base, unsigned long Offset)
{
    mem_barrier();
    return *(CARD16 *) ((unsigned long) Base + (Offset));
}

static inline int
xf86ReadMmio32(void *Base, unsigned long Offset)
{
    mem_barrier();
    return *(CARD32 *) ((unsigned long) Base + (Offset));
}

static inline void
xf86WriteMmio8(int Value, void *Base, unsigned long Offset)
{
    write_mem_barrier();
    *(CARD8 *) ((unsigned long) Base + (Offset)) = Value;
}

static inline void
xf86WriteMmio16(int Value, void *Base, unsigned long Offset)
{
    write_mem_barrier();
    *(CARD16 *) ((unsigned long) Base + (Offset)) = Value;
}

static inline void
xf86WriteMmio32(int Value, void *Base, unsigned long Offset)
{
    write_mem_barrier();
    *(CARD32 *) ((unsigned long) Base + (Offset)) = Value;
}

extern _X_EXPORT void xf86SlowBCopyFromBus(unsigned char *, unsigned char *,
                                           int);
extern _X_EXPORT void xf86SlowBCopyToBus(unsigned char *, unsigned char *, int);

/* Some macros to hide the system dependencies for MMIO accesses */
/* Changed to kill noise generated by gcc's -Wcast-align */
#define MMIO_IN8(base, offset) xf86ReadMmio8(base, offset)
#define MMIO_IN16(base, offset) xf86ReadMmio16(base, offset)
#define MMIO_IN32(base, offset) xf86ReadMmio32(base, offset)

#define MMIO_OUT8(base, offset, val) \
    xf86WriteMmio8((CARD8)(val), base, offset)
#define MMIO_OUT16(base, offset, val) \
    xf86WriteMmio16((CARD16)(val), base, offset)
#define MMIO_OUT32(base, offset, val) \
    xf86WriteMmio32((CARD32)(val), base, offset)

#elif defined(__powerpc__) || defined(__sparc__)
 /*
  * we provide byteswapping and no byteswapping functions here
  * with byteswapping as default,
  * drivers that don't need byteswapping should define MMIO_IS_BE
  */
#define MMIO_IN8(base, offset) xf86ReadMmio8(base, offset)
#define MMIO_OUT8(base, offset, val) \
    xf86WriteMmio8(base, offset, (CARD8)(val))

#if defined(MMIO_IS_BE)     /* No byteswapping */
#define MMIO_IN16(base, offset) xf86ReadMmio16Be(base, offset)
#define MMIO_IN32(base, offset) xf86ReadMmio32Be(base, offset)
#define MMIO_OUT16(base, offset, val) \
    xf86WriteMmio16Be(base, offset, (CARD16)(val))
#define MMIO_OUT32(base, offset, val) \
    xf86WriteMmio32Be(base, offset, (CARD32)(val))
#else                           /* byteswapping is the default */
#define MMIO_IN16(base, offset) xf86ReadMmio16Le(base, offset)
#define MMIO_IN32(base, offset) xf86ReadMmio32Le(base, offset)
#define MMIO_OUT16(base, offset, val) \
     xf86WriteMmio16Le(base, offset, (CARD16)(val))
#define MMIO_OUT32(base, offset, val) \
     xf86WriteMmio32Le(base, offset, (CARD32)(val))
#endif

#elif defined(__nds32__)
 /*
  * we provide byteswapping and no byteswapping functions here
  * with no byteswapping as default; when endianness of CPU core
  * and I/O devices don't match, byte swapping is necessary
  * drivers that need byteswapping should define NDS32_MMIO_SWAP
  */
#define MMIO_IN8(base, offset) xf86ReadMmio8(base, offset)
#define MMIO_OUT8(base, offset, val) \
    xf86WriteMmio8(base, offset, (CARD8)(val))

#if defined(NDS32_MMIO_SWAP)    /* byteswapping */
#define MMIO_IN16(base, offset) xf86ReadMmio16Swap(base, offset)
#define MMIO_IN32(base, offset) xf86ReadMmio32Swap(base, offset)
#define MMIO_OUT16(base, offset, val) \
    xf86WriteMmio16Swap(base, offset, (CARD16)(val))
#define MMIO_OUT32(base, offset, val) \
    xf86WriteMmio32Swap(base, offset, (CARD32)(val))
#else                           /* no byteswapping is the default */
#define MMIO_IN16(base, offset) xf86ReadMmio16(base, offset)
#define MMIO_IN32(base, offset) xf86ReadMmio32(base, offset)
#define MMIO_OUT16(base, offset, val) \
     xf86WriteMmio16(base, offset, (CARD16)(val))
#define MMIO_OUT32(base, offset, val) \
     xf86WriteMmio32(base, offset, (CARD32)(val))
#endif

#else                           /* !__alpha__ && !__powerpc__ && !__sparc__ */

#define MMIO_IN8(base, offset) \
	*(volatile CARD8 *)(((CARD8*)(base)) + (offset))
#define MMIO_IN16(base, offset) \
	*(volatile CARD16 *)(void *)(((CARD8*)(base)) + (offset))
#define MMIO_IN32(base, offset) \
	*(volatile CARD32 *)(void *)(((CARD8*)(base)) + (offset))
#define MMIO_OUT8(base, offset, val) \
	*(volatile CARD8 *)(((CARD8*)(base)) + (offset)) = (val)
#define MMIO_OUT16(base, offset, val) \
	*(volatile CARD16 *)(void *)(((CARD8*)(base)) + (offset)) = (val)
#define MMIO_OUT32(base, offset, val) \
	*(volatile CARD32 *)(void *)(((CARD8*)(base)) + (offset)) = (val)

#endif                          /* __alpha__ */

/*
 * With Intel, the version in os-support/misc/SlowBcopy.s is used.
 * This avoids port I/O during the copy (which causes problems with
 * some hardware).
 */
#ifdef __alpha__
#define slowbcopy_tobus(src,dst,count) xf86SlowBCopyToBus(src,dst,count)
#define slowbcopy_frombus(src,dst,count) xf86SlowBCopyFromBus(src,dst,count)
#else                           /* __alpha__ */
#define slowbcopy_tobus(src,dst,count) xf86SlowBcopy(src,dst,count)
#define slowbcopy_frombus(src,dst,count) xf86SlowBcopy(src,dst,count)
#endif                          /* __alpha__ */

#endif                          /* _COMPILER_H */