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/*

 * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.

 * Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.

 *

 * 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, sub license,

 * 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 (including the

 * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL

 * VIA, S3 GRAPHICS, AND/OR ITS SUPPLIERS 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.

 */

#ifndef _VIA_DRV_H_

#define _VIA_DRV_H_

typedef struct drm_via_private {

        drm_via_sarea_t *sarea_priv;

        drm_map_t *sarea;

        drm_map_t *fb;

        drm_map_t *mmio;

        unsigned long agpAddr;

} drm_via_private_t;

extern int via_do_init_map(drm_device_t *dev, drm_via_init_t *init);

extern int via_do_cleanup_map(drm_device_t *dev);

extern int via_map_init(struct inode *inode, struct file *filp,

                   unsigned int cmd, unsigned long arg);

/*=* [DBG] For RedHat7.3 insert kernel module has unresolved symbol

   cmpxchg() *=*/

/* Include this here so that driver can be used with older kernels. */

#ifndef __HAVE_ARCH_CMPXCHG 

#ifdef CONFIG_SMP

#define LOCK_PREFIX "lock ; "

#else

#define LOCK_PREFIX ""

#endif          

#if defined(__alpha__)

static __inline__ unsigned long

__cmpxchg_u32(volatile int *m, int old, int new)

{

        unsigned long prev, cmp;

        __asm__ __volatile__(

        "1:     ldl_l %0,%2\n"

        "       cmpeq %0,%3,%1\n"

        "       beq %1,2f\n"

        "       mov %4,%1\n"

        "       stl_c %1,%2\n"

        "       beq %1,3f\n"

        "2:     mb\n"

        ".subsection 2\n"

        "3:     br 1b\n"

        ".previous"

        : "=&r"(prev), "=&r"(cmp), "=m"(*m)

        : "r"((long) old), "r"(new), "m"(*m));

        return prev;

}

static __inline__ unsigned long

__cmpxchg_u64(volatile long *m, unsigned long old, unsigned long new)

{

        unsigned long prev, cmp;

        __asm__ __volatile__(

        "1:     ldq_l %0,%2\n"

        "       cmpeq %0,%3,%1\n"

        "       beq %1,2f\n"

        "       mov %4,%1\n"

        "       stq_c %1,%2\n"

        "       beq %1,3f\n"

        "2:     mb\n"

        ".subsection 2\n"

        "3:     br 1b\n"

        ".previous"

        : "=&r"(prev), "=&r"(cmp), "=m"(*m)

        : "r"((long) old), "r"(new), "m"(*m));

        return prev;

}

static __inline__ unsigned long

__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size)

{

        switch (size) {

                case 4:

                        return __cmpxchg_u32(ptr, old, new);

                case 8:

                        return __cmpxchg_u64(ptr, old, new);

        }

        return old;

}

#define cmpxchg(ptr,o,n)                                                 \

  ({                                                                     \

     __typeof__(*(ptr)) _o_ = (o);                                       \

     __typeof__(*(ptr)) _n_ = (n);                                       \

     (__typeof__(*(ptr))) __cmpxchg((ptr), (unsigned long)_o_,           \

                                    (unsigned long)_n_, sizeof(*(ptr))); \

  })

#elif __i386__

static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,

                                      unsigned long new, int size)

{

        unsigned long prev;

        switch (size) {

        case 1:

                __asm__ __volatile__(LOCK_PREFIX "cmpxchgb %b1,%2"

                                     : "=a"(prev)

                                     : "q"(new), "m"(*__xg(ptr)), "0"(old)

                                     : "memory");

                return prev;

        case 2:

                __asm__ __volatile__(LOCK_PREFIX "cmpxchgw %w1,%2"

                                     : "=a"(prev)

                                     : "q"(new), "m"(*__xg(ptr)), "0"(old)

                                     : "memory");

                return prev;

        case 4:

                __asm__ __volatile__(LOCK_PREFIX "cmpxchgl %1,%2"

                                     : "=a"(prev)

                                     : "q"(new), "m"(*__xg(ptr)), "0"(old)

                                     : "memory");

                return prev;

        }

        return old;

}

#define cmpxchg(ptr,o,n)                                                \

  ((__typeof__(*(ptr)))__cmpxchg((ptr),(unsigned long)(o),              \

                                 (unsigned long)(n),sizeof(*(ptr))))

#endif /* i386 & alpha */

#endif

#endif