/*      $NetBSD: bus.h,v 1.5 2021/11/15 07:26:23 skrll Exp $    */

/*-
 * Copyright (c) 1996, 1997, 1998, 2001 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
 * NASA Ames Research Center.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND 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 THE FOUNDATION OR 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) 1996 Charles M. Hannum.  All rights reserved.
 * Copyright (c) 1996 Christopher G. Demetriou.  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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Christopher G. Demetriou
 *      for the NetBSD Project.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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.
 */

#ifndef _IA64_BUS_H_
#define _IA64_BUS_H_

#include <sys/systm.h>

#include <machine/cpufunc.h>
#include <machine/vmparam.h>

#ifdef BUS_SPACE_DEBUG
/*
 * Macros for sanity-checking the aligned-ness of pointers passed to
 * bus space ops.  These are not strictly necessary on the x86, but
 * could lead to performance improvements, and help catch problems
 * with drivers that would creep up on other architectures.
 */
#define __BUS_SPACE_ALIGNED_ADDRESS(p, t)                               \
        ((((u_long)(p)) & (sizeof(t)-1)) == 0)

#define __BUS_SPACE_ADDRESS_SANITY(p, t, d)                             \
({                                                                      \
        if (__BUS_SPACE_ALIGNED_ADDRESS((p), t) == 0) {                 \
                printf("%s 0x%lx not aligned to %d bytes %s:%d\n",      \
                    d, (u_long)(p), sizeof(t), __FILE__, __LINE__);     \
        }                                                               \
        (void) 0;                                                       \
})

#define BUS_SPACE_ALIGNED_POINTER(p, t) __BUS_SPACE_ALIGNED_ADDRESS(p, t)
#else
#define __BUS_SPACE_ADDRESS_SANITY(p,t,d)       (void) 0
#define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t)
#endif /* BUS_SPACE_DEBUG */

/*
 * bus_space_map flags
 */

#define BUS_SPACE_MAP_CACHEABLE         0x01
#define BUS_SPACE_MAP_LINEAR            0x02
#define BUS_SPACE_MAP_PREFETCHABLE      0x04

/*
 * Derived from x86 implementation, ia64 has both i/o and mem spaces
 * These values are for bus space tag.
 */
#define IA64_BUS_SPACE_IO        0       /* space is i/o space */
#define IA64_BUS_SPACE_MEM       1       /* space is mem space */

#define __BUS_SPACE_HAS_STREAM_METHODS 1

/*
 * Bus address and size types
 */
typedef u_long bus_addr_t;
typedef u_long bus_size_t;

#define PRIxBUSADDR     "lx"
#define PRIxBUSSIZE     "lx"
#define PRIuBUSSIZE     "lu"

/*
 * Access methods for bus resources and address space.
 */
typedef int bus_space_tag_t;
typedef u_long bus_space_handle_t;

#define PRIxBSH         "lx"

/* map/unmap */

int     ia64_bus_space_map(bus_space_tag_t, bus_addr_t,
            bus_size_t, int, bus_space_handle_t *);
void    ia64_bus_space_unmap(bus_space_tag_t, bus_space_handle_t,
            bus_size_t);
int     ia64_bus_space_subregion(bus_space_tag_t, bus_space_handle_t,
            bus_size_t, bus_size_t, bus_space_handle_t *);
#define bus_space_map(t, a, s, f, hp)                                   \
        ia64_bus_space_map((t), (a), (s), (f), (hp))
#define bus_space_unmap(t, h, s)                                        \
        ia64_bus_space_unmap((t), (h), (s))
#define bus_space_subregion(t, h, o, s, nhp)                            \
        ia64_bus_space_subregion((t), (h), (o), (s), (nhp))

/* vaddr */

#define bus_space_vaddr(t, h) \
        ((t) == IA64_BUS_SPACE_MEM ? (void *)(h) : (void *)0)

/* map to user space */

paddr_t ia64_bus_space_mmap(bus_space_tag_t, bus_addr_t, off_t, int, int);

#define bus_space_mmap(t, b, o, p, f)                                   \
        ia64_bus_space_mmap((t), (b), (o), (p), (f))

/* alloc/free */

int     ia64_bus_space_alloc(bus_space_tag_t, bus_addr_t, bus_addr_t,
            bus_size_t, bus_size_t, bus_size_t, int, bus_addr_t *,
            bus_space_handle_t *);
void    ia64_bus_space_free(bus_space_tag_t, bus_space_handle_t, bus_size_t);

#define bus_space_alloc(t, rs, re, s, a, b, f, ap, hp)                  \
        ia64_bus_space__alloc((t), (rs), (re), (s), (a), (b), (f), (ap), (hp))
#define bus_space_free(t, h, s)                                         \
        ia64_bus_space_free((t), (h), (s))

/*
 *      uintN_t bus_space_read_N(bus_space_tag_t tag,
 *          bus_space_handle_t bsh, bus_size_t offset);
 *
 * Read a 1, 2, 4, or 8 byte quantity from bus space
 * described by tag/handle/offset.
 */

#define bus_space_read_1(t, h, o)                                       \
        ((t) == IA64_BUS_SPACE_IO ? (inb((h) + (o))) :\
            (*(volatile uint8_t *)((h) + (o))))

#define bus_space_read_2(t, h, o)                                       \
         (__BUS_SPACE_ADDRESS_SANITY((h) + (o), uint16_t, "bus addr"),  \
          ((t) == IA64_BUS_SPACE_IO ? (inw((h) + (o))) :                \
            (*(volatile uint16_t *)((h) + (o)))))

#define bus_space_read_4(t, h, o)                                       \
         (__BUS_SPACE_ADDRESS_SANITY((h) + (o), uint32_t, "bus addr"),  \
          ((t) == IA64_BUS_SPACE_IO ? (inl((h) + (o))) :                \
            (*(volatile uint32_t *)((h) + (o)))))

#define bus_space_read_8(t, h, o)                                       \
         (__BUS_SPACE_ADDRESS_SANITY((h) + (o), uint64_t, "bus addr"),  \
          ((t) == IA64_BUS_SPACE_IO ?                                   \
            ({ printf("%s: can't read 8bytes from I/O space\n", __FUNCTION__); 0;}) : \
            (*(volatile uint64_t *)((h) + (o)))))

#define bus_space_read_stream_1 bus_space_read_1
#define bus_space_read_stream_2 bus_space_read_2
#define bus_space_read_stream_4 bus_space_read_4
#define bus_space_read_stream_8 bus_space_read_8

/*
 *      void bus_space_read_multi_N(bus_space_tag_t tag,
 *          bus_space_handle_t bsh, bus_size_t offset,
 *          uintN_t *addr, size_t count);
 *
 * Read `count' 1, 2, 4, or 8 byte quantities from bus space
 * described by tag/handle/offset and copy into buffer provided.
 */

#define bus_space_read_multi_1(t, h, o, ptr, cnt)                       \
do {                                                                    \
        if ((t) == IA64_BUS_SPACE_IO) {                                 \
                insb((h) + (o), (ptr), (cnt));                          \
        } else {                                                        \
                int __i;                                                \
                volatile uint8_t *__p = (uint8_t *)((h) + (o));         \
                uint8_t *__dst = (ptr);                                 \
                for (__i = 0; __i < (cnt); __i++)                       \
                        *__dst++ = *__p;                                \
        }                                                               \
} while (/* CONSTCOND */ 0)

#define bus_space_read_multi_2(t, h, o, ptr, cnt)                       \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((ptr), uint16_t, "buffer");          \
        __BUS_SPACE_ADDRESS_SANITY((h) + (o), uint16_t, "bus addr");    \
        if ((t) == IA64_BUS_SPACE_IO) {                                 \
                insw((h) + (o), (ptr), (cnt));                          \
        } else {                                                        \
                int __i;                                                \
                volatile uint16_t *__p = (uint16_t *)((h) + (o));       \
                uint16_t *__dst = (ptr);                                \
                for (__i = 0; __i < (cnt); __i++)                       \
                        *__dst++ = *__p;                                \
        }                                                               \
} while (/* CONSTCOND */ 0)

#define bus_space_read_multi_4(t, h, o, ptr, cnt)                       \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((ptr), uint32_t, "buffer");          \
        __BUS_SPACE_ADDRESS_SANITY((h) + (o), uint32_t, "bus addr");    \
        if ((t) == IA64_BUS_SPACE_IO) {                                 \
                insl((h) + (o), (ptr), (cnt));                          \
        } else {                                                        \
                int __i;                                                \
                volatile uint32_t *__p = (uint32_t *)((h) + (o));       \
                uint32_t *__dst = (ptr);                                \
                for (__i = 0; __i < (cnt); __i++)                       \
                        *__dst++ = *__p;                                \
        }                                                               \
} while (/* CONSTCOND */ 0)

#define bus_space_read_multi_8(t, h, o, ptr, cnt)                       \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((ptr), uint64_t, "buffer");          \
        __BUS_SPACE_ADDRESS_SANITY((h) + (o), uint64_t, "bus addr");    \
        if ((t) == IA64_BUS_SPACE_IO) {                                 \
                printf("%s: can't read 8bytes from I/O space\n",        \
                    __FUNCTION__);                                      \
        } else {                                                        \
                int __i;                                                \
                volatile uint64_t *__p = (uint64_t *)((h) + (o));       \
                uint64_t *__dst = (ptr);                                \
                for (__i = 0; __i < (cnt); __i++)                       \
                        *__dst++ = *__p;                                \
        }                                                               \
} while (/* CONSTCOND */ 0)

#define bus_space_read_multi_stream_1 bus_space_read_multi_1
#define bus_space_read_multi_stream_2 bus_space_read_multi_2
#define bus_space_read_multi_stream_4 bus_space_read_multi_4
#define bus_space_read_multi_stream_8 bus_space_read_multi_8


/*
 *      void bus_space_read_region_N(bus_space_tag_t tag,
 *          bus_space_handle_t bsh, bus_size_t offset,
 *          uintN_t *addr, size_t count);
 *
 * Read `count' 1, 2, 4, or 8 byte quantities from bus space
 * described by tag/handle and starting at `offset' and copy into
 * buffer provided.
 */

#define bus_space_read_region_1(t, h, o, ptr, cnt)                      \
do {                                                                    \
        if ((t) == IA64_BUS_SPACE_IO) {                                 \
                int __i;                                                \
                volatile bus_addr_t __port = (h) + (o);                 \
                uint8_t *__dst = (ptr);                                 \
                for (__i = 0; __i < (cnt); __i++) {                     \
                        *__dst++ = inb(__port);                         \
                        __port++;                                       \
                }                                                       \
        } else {                                                        \
                int __i;                                                \
                volatile uint8_t *__p = (uint8_t *)((h) + (o));         \
                uint8_t *__dst = (ptr);                                 \
                for (__i = 0; __i < (cnt); __i++)                       \
                        *__dst++ = *__p++;                              \
        }                                                               \
} while (/* CONSTCOND */ 0)

#define bus_space_read_region_2(t, h, o, ptr, cnt)                      \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((ptr), uint16_t, "buffer");          \
        __BUS_SPACE_ADDRESS_SANITY((h) + (o), uint16_t, "bus addr");    \
        if ((t) == IA64_BUS_SPACE_IO) {                                 \
                int __i;                                                \
                volatile bus_addr_t __port = (h) + (o);                 \
                uint8_t *__dst = (ptr);                                 \
                for (__i = 0; __i < (cnt); __i++) {                     \
                        *__dst++ = inb(__port);                         \
                        __port += 2;                                    \
                }                                                       \
        } else {                                                        \
                int __i;                                                \
                volatile uint16_t *__p = (uint16_t *)((h) + (o));       \
                uint16_t *__dst = (ptr);                                \
                for (__i = 0; __i < (cnt); __i++)                       \
                        *__dst++ = *__p++;                              \
        }                                                               \
} while (/* CONSTCOND */ 0)

#define bus_space_read_region_4(t, h, o, ptr, cnt)                      \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((ptr), uint32_t, "buffer");          \
        __BUS_SPACE_ADDRESS_SANITY((h) + (o), uint32_t, "bus addr");    \
        if ((t) == IA64_BUS_SPACE_IO) {                                 \
                int __i;                                                \
                volatile bus_addr_t __port = (h) + (o);                 \
                uint8_t *__dst = (ptr);                                 \
                for (__i = 0; __i < (cnt); __i++) {                     \
                        *__dst++ = inb(__port);                         \
                        __port += 4;                                    \
                }                                                       \
        } else {                                                        \
                volatile uint32_t *__p = (uint32_t *)((h) + (o));       \
                uint32_t *__dst = (ptr);                                \
                for (__i = 0; __i < (cnt); __i++)                       \
                        *__dst++ = *__p++;                              \
        }                                                               \
} while (/* CONSTCOND */ 0)

#define bus_space_read_region_8(t, h, o, ptr, cnt)                      \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((ptr), uint64_t, "buffer");          \
        __BUS_SPACE_ADDRESS_SANITY((h) + (o), uint64_t, "bus addr");    \
        if ((t) == IA64_BUS_SPACE_IO) {                                 \
                printf("%s: can't read 8bytes from I/O space\n",        \
                    __FUNCTION__);                                      \
        } else {                                                        \
                volatile uint64_t *__p = (uint64_t *)((h) + (o));       \
                uint64_t *__dst = (ptr);                                \
                for (__i = 0; __i < (cnt); __i++)                       \
                        *__dst++ = *__p++;                              \
        }                                                               \
} while (/* CONSTCOND */ 0)

#define bus_space_read_region_stream_1 bus_space_read_region_1
#define bus_space_read_region_stream_2 bus_space_read_region_2
#define bus_space_read_region_stream_4 bus_space_read_region_4
#define bus_space_read_region_stream_8 bus_space_read_region_8


/*
 *      void bus_space_write_N(bus_space_tag_t tag,
 *          bus_space_handle_t bsh, bus_size_t offset,
 *          uintN_t value);
 *
 * Write the 1, 2, 4, or 8 byte value `value' to bus space
 * described by tag/handle/offset.
 */

#define bus_space_write_1(t, h, o, v)                                   \
do {                                                                    \
        if ((t) == IA64_BUS_SPACE_IO)                                   \
                outb((h) + (o), (v));                                   \
        else                                                            \
                ((void)(*(volatile uint8_t *)((h) + (o)) = (v)));       \
} while (/* CONSTCOND */ 0)

#define bus_space_write_2(t, h, o, v)                                   \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((h) + (o), uint16_t, "bus addr");    \
        if ((t) == IA64_BUS_SPACE_IO)                                   \
                outw((h) + (o), (v));                                   \
        else                                                            \
                ((void)(*(volatile uint16_t *)((h) + (o)) = (v)));      \
} while (/* CONSTCOND */ 0)

#define bus_space_write_4(t, h, o, v)                                   \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((h) + (o), uint32_t, "bus addr");    \
        if ((t) == IA64_BUS_SPACE_IO)                                   \
                outl((h) + (o), (v));                                   \
        else                                                            \
                ((void)(*(volatile uint32_t *)((h) + (o)) = (v)));      \
} while (/* CONSTCOND */ 0)

#define bus_space_write_8(t, h, o, v)                                   \
         __BUS_SPACE_ADDRESS_SANITY((h) + (o), uint64_t, "bus addr");   \
         if ((t) == IA64_BUS_SPACE_IO ?                                 \
             printf("%s: can't write 8bytes to I/O space\n", __FUNCTION__); : \
             (*(volatile uint64_t *)((h) + (o)) = (v)))

#define bus_space_write_stream_1 bus_space_write_1
#define bus_space_write_stream_2 bus_space_write_2
#define bus_space_write_stream_4 bus_space_write_4
#define bus_space_write_stream_8 bus_space_write_8

/*
 *      void bus_space_write_multi_N(bus_space_tag_t tag,
 *          bus_space_handle_t bsh, bus_size_t offset,
 *          const uintN_t *addr, size_t count);
 *
 * Write `count' 1, 2, 4, or 8 byte quantities from the buffer
 * provided to bus space described by tag/handle/offset.
 */

#define bus_space_write_multi_1(t, h, o, ptr, cnt)                      \
do {                                                                    \
        if ((t) == IA64_BUS_SPACE_IO) {                                 \
                outsb((h) + (o), (ptr), (cnt));                         \
        } else {                                                        \
                int __i;                                                \
                volatile uint8_t *__p = (uint8_t *)((h) + (o));         \
                const uint8_t *__src = (ptr);                           \
                for (__i = 0; __i < (cnt); __i++)                       \
                        *__p = *__src++;                                \
        }                                                               \
} while (/* CONSTCOND */ 0)

#define bus_space_write_multi_2(t, h, o, ptr, cnt)                      \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((ptr), uint16_t, "buffer");          \
        __BUS_SPACE_ADDRESS_SANITY((h) + (o), uint16_t, "bus addr");    \
        if ((t) == IA64_BUS_SPACE_IO) {                                 \
                outsw((h) + (o), (ptr), (cnt));                         \
        } else {                                                        \
                int __i;                                                \
                volatile uint16_t *__p = (uint16_t *)((h) + (o));       \
                const uint16_t *__src = (ptr);                          \
                for (__i = 0; __i < (cnt); __i++)                       \
                        *__p = *__src++;                                \
        }                                                               \
} while (/* CONSTCOND */ 0)

#define bus_space_write_multi_4(t, h, o, ptr, cnt)                      \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((ptr), uint32_t, "buffer");          \
        __BUS_SPACE_ADDRESS_SANITY((h) + (o), uint32_t, "bus addr");    \
        if ((t) == IA64_BUS_SPACE_IO) {                                 \
                outsl((h) + (o), (ptr), (cnt));                         \
        } else {                                                        \
                int __i;                                                \
                volatile uint32_t *__p = (uint32_t *)((h) + (o));       \
                const uint32_t *__src = (ptr);                          \
                for (__i = 0; __i < (cnt); __i++)                       \
                        *__p = *__src++;                                \
        }                                                               \
} while (/* CONSTCOND */ 0)

#define bus_space_write_multi_8(t, h, o, ptr, cnt)                      \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((ptr), uint64_t, "buffer");          \
        __BUS_SPACE_ADDRESS_SANITY((h) + (o), uint64_t, "bus addr");    \
        if ((t) == IA64_BUS_SPACE_IO) {                                 \
                printf("%s: can't write 8bytes to I/O space\n", __FUNCTION__);\
        } else {                                                        \
                int __i;                                                \
                volatile uint64_t *__p = (uint64_t *)((h) + (o));       \
                const uint64_t *__src = (ptr);                          \
                for (__i = 0; __i < (cnt); __i++)                       \
                        *__p = *__src++;                                \
        }                                                               \
} while (/* CONSTCOND */ 0)

#define bus_space_write_multi_stream_1 bus_space_write_multi_1
#define bus_space_write_multi_stream_2 bus_space_write_multi_2
#define bus_space_write_multi_stream_4 bus_space_write_multi_4
#define bus_space_write_multi_stream_8 bus_space_write_multi_8


/*
 *      void bus_space_write_region_N(bus_space_tag_t tag,
 *          bus_space_handle_t bsh, bus_size_t offset,
 *          const uintN_t *addr, size_t count);
 *
 * Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided
 * to bus space described by tag/handle starting at `offset'.
 */

#define bus_space_write_region_1(t, h, o, ptr, cnt)                     \
do {                                                                    \
        if ((t) == IA64_BUS_SPACE_IO) {                                 \
                int __i;                                                \
                volatile bus_addr_t __port = (h) + (o);                 \
                const uint8_t *__src = (ptr);                           \
                for (__i = 0; __i < (cnt); __i++) {                     \
                        outb(__port, *__src);                           \
                        __port++;                                       \
                        __src++;                                        \
                }                                                       \
        } else {                                                        \
                int __i;                                                \
                volatile uint8_t *__p = (uint8_t *)((h) + (o));         \
                const uint8_t *__src = (ptr);                           \
                for (__i = 0; __i < (cnt); __i++)                       \
                        *__p++ = *__src++;                              \
        }                                                               \
} while (/* CONSTCOND */ 0)

#define bus_space_write_region_2(t, h, o, ptr, cnt)                     \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((ptr), uint16_t, "buffer");          \
        __BUS_SPACE_ADDRESS_SANITY((h) + (o), uint16_t, "bus addr");    \
        if ((t) == IA64_BUS_SPACE_IO) {                                 \
                int __i;                                                \
                volatile bus_addr_t __port = (h) + (o);                 \
                const uint16_t *__src = (ptr);                          \
                for (__i = 0; __i < (cnt); __i++) {                     \
                        outw(__port, *__src);                           \
                        __port += 2;                                    \
                        __src++;                                        \
                }                                                       \
        } else {                                                        \
                int __i;                                                \
                volatile uint16_t *__p = (uint16_t *)((h) + (o));       \
                const uint16_t *__src = (ptr);                          \
                for (__i = 0; __i < (cnt); __i++)                       \
                        *__p++ = *__src++;                              \
        }                                                               \
} while (/* CONSTCOND */ 0)

#define bus_space_write_region_4(t, h, o, ptr, cnt)                     \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((ptr), uint32_t, "buffer");          \
        __BUS_SPACE_ADDRESS_SANITY((h) + (o), uint32_t, "bus addr");    \
        if ((t) == IA64_BUS_SPACE_IO) {                                 \
                int __i;                                                \
                volatile bus_addr_t __port = (h) + (o);                 \
                const uint32_t *__src = (ptr);                          \
                for (__i = 0; __i < (cnt); __i++) {                     \
                        outl(__port, *__src);                           \
                        __port += 4;                                    \
                        __src++;                                        \
                }                                                       \
        } else {                                                        \
                int __i;                                                \
                volatile uint32_t *__p = (uint32_t *)(h) + (o);         \
                const uint32_t *__src = (ptr);                          \
                for (__i = 0; __i < (cnt); __i++)                       \
                        *__p++ = *__src++;                              \
        }                                                               \
} while (/* CONSTCOND */ 0)

#define bus_space_write_region_8(t, h, o, ptr, cnt)                     \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((ptr), uint64_t, "buffer");          \
        __BUS_SPACE_ADDRESS_SANITY((h) + (o), uint64_t, "bus addr");    \
        if ((t) == IA64_BUS_SPACE_IO) {                                 \
                printf("%s: can't write 8bytes to I/O space\n", __FUNCTION__);\
        } else {                                                        \
                int __i;                                                \
                volatile uint64_t *__p = (uint64_t *)((h) + (o));       \
                const uint64_t *__src = (ptr);                          \
                for (__i = 0; __i < (cnt); __i++)                       \
                        *__p++ = *__src++;                              \
        }                                                               \
} while (/* CONSTCOND */ 0)

#define bus_space_write_region_stream_1 bus_space_write_region_1
#define bus_space_write_region_stream_2 bus_space_write_region_2
#define bus_space_write_region_stream_4 bus_space_write_region_4
#define bus_space_write_region_stream_8 bus_space_write_region_8


/*
 *      void bus_space_set_multi_N(bus_space_tag_t tag,
 *          bus_space_handle_t bsh, bus_size_t offset, uintN_t val,
 *          size_t count);
 *
 * Write the 1, 2, 4, or 8 byte value `val' to bus space described
 * by tag/handle/offset `count' times.
 */

static __inline void ia64_bus_space_set_multi_1(bus_space_tag_t,
        bus_space_handle_t, bus_size_t, uint8_t, size_t);
static __inline void ia64_bus_space_set_multi_2(bus_space_tag_t,
        bus_space_handle_t, bus_size_t, uint16_t, size_t);
static __inline void ia64_bus_space_set_multi_4(bus_space_tag_t,
        bus_space_handle_t, bus_size_t, uint32_t, size_t);
static __inline void ia64_bus_space_set_multi_8(bus_space_tag_t,
        bus_space_handle_t, bus_size_t, uint64_t, size_t);

#define bus_space_set_multi_1(t, h, o, v, c)                            \
        ia64_bus_space_set_multi_1((t), (h), (o), (v), (c))

#define bus_space_set_multi_2(t, h, o, v, c)                            \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((h) + (o), uint16_t, "bus addr");    \
        ia64_bus_space_set_multi_2((t), (h), (o), (v), (c));            \
} while (/* CONSTCOND */ 0)

#define bus_space_set_multi_4(t, h, o, v, c)                            \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((h) + (o), uint32_t, "bus addr");    \
        ia64_bus_space_set_multi_4((t), (h), (o), (v), (c));            \
} while (/* CONSTCOND */ 0)

#define bus_space_set_multi_8(t, h, o, v, c)                            \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((h) + (o), uint64_t, "bus addr");    \
        ia64_bus_space_set_multi_8((t), (h), (o), (v), (c));            \
} while (/* CONSTCOND */ 0)

static __inline void
ia64_bus_space_set_multi_1(bus_space_tag_t t, bus_space_handle_t h,
    bus_size_t o, uint8_t v, size_t c)
{
        bus_addr_t addr = h + o;

        if (t == IA64_BUS_SPACE_IO)
                while (c--)
                        outb(addr, v);
        else
                while (c--)
                        *(volatile uint8_t *)(addr) = v;
}

static __inline void
ia64_bus_space_set_multi_2(bus_space_tag_t t, bus_space_handle_t h,
    bus_size_t o, uint16_t v, size_t c)
{
        bus_addr_t addr = h + o;

        if (t == IA64_BUS_SPACE_IO)
                while (c--)
                        outw(addr, v);
        else
                while (c--)
                        *(volatile uint16_t *)(addr) = v;
}

static __inline void
ia64_bus_space_set_multi_4(bus_space_tag_t t, bus_space_handle_t h,
    bus_size_t o, uint32_t v, size_t c)
{
        bus_addr_t addr = h + o;

        if (t == IA64_BUS_SPACE_IO)
                while (c--)
                        outl(addr, v);
        else
                while (c--)
                        *(volatile uint32_t *)(addr) = v;
}

static __inline void
ia64_bus_space_set_multi_8(bus_space_tag_t t, bus_space_handle_t h,
    bus_size_t o, uint64_t v, size_t c)
{
        bus_addr_t addr = h + o;

        if (t == IA64_BUS_SPACE_IO)
                printf("%s: can't write 8bytes to I/O space\n", __FUNCTION__);
        else
                while (c--)
                        *(volatile uint64_t *)(addr) = v;
}


/*
 *      void bus_space_set_region_N(bus_space_tag_t tag,
 *          bus_space_handle_t bsh, bus_size_t offset, uintN_t val,
 *          size_t count);
 *
 * Write `count' 1, 2, 4, or 8 byte value `val' to bus space described
 * by tag/handle starting at `offset'.
 */

static __inline void ia64_bus_space_set_region_1(bus_space_tag_t,
        bus_space_handle_t, bus_size_t, uint8_t, size_t);
static __inline void ia64_bus_space_set_region_2(bus_space_tag_t,
        bus_space_handle_t, bus_size_t, uint16_t, size_t);
static __inline void ia64_bus_space_set_region_4(bus_space_tag_t,
        bus_space_handle_t, bus_size_t, uint32_t, size_t);

#define bus_space_set_region_1(t, h, o, v, c)                           \
        ia64_bus_space_set_region_1((t), (h), (o), (v), (c))

#define bus_space_set_region_2(t, h, o, v, c)                           \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((h) + (o), uint16_t, "bus addr");    \
        ia64_bus_space_set_region_2((t), (h), (o), (v), (c));           \
} while (/* CONSTCOND */ 0)

#define bus_space_set_region_4(t, h, o, v, c)                           \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((h) + (o), uint32_t, "bus addr");    \
        ia64_bus_space_set_region_4((t), (h), (o), (v), (c));           \
} while (/* CONSTCOND */ 0)

#define bus_space_set_region_8(t, h, o, v, c)                           \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((h) + (o), uint64_t, "bus addr");    \
        ia64_bus_space_set_region_8((t), (h), (o), (v), (c));           \
} while (/* CONSTCOND */ 0)

static __inline void
ia64_bus_space_set_region_1(bus_space_tag_t t, bus_space_handle_t h,
    bus_size_t o, uint8_t v, size_t c)
{
        bus_addr_t addr = h + o;

        if (t == IA64_BUS_SPACE_IO)
                for (; c != 0; c--, addr++)
                        outb(addr, v);
        else
                for (; c != 0; c--, addr++)
                        *(volatile uint8_t *)(addr) = v;
}

static __inline void
ia64_bus_space_set_region_2(bus_space_tag_t t, bus_space_handle_t h,
    bus_size_t o, uint16_t v, size_t c)
{
        bus_addr_t addr = h + o;

        if (t == IA64_BUS_SPACE_IO)
                for (; c != 0; c--, addr += 2)
                        outw(addr, v);
        else
                for (; c != 0; c--, addr += 2)
                        *(volatile uint16_t *)(addr) = v;
}

static __inline void
ia64_bus_space_set_region_4(bus_space_tag_t t, bus_space_handle_t h,
    bus_size_t o, uint32_t v, size_t c)
{
        bus_addr_t addr = h + o;

        if (t == IA64_BUS_SPACE_IO)
                for (; c != 0; c--, addr += 4)
                        outl(addr, v);
        else
                for (; c != 0; c--, addr += 4)
                        *(volatile uint32_t *)(addr) = v;
}

static __inline void
ia64_bus_space_set_region_8(bus_space_tag_t t, bus_space_handle_t h,
    bus_size_t o, uint64_t v, size_t c)
{
        bus_addr_t addr = h + o;

        if (t == IA64_BUS_SPACE_IO)
                printf("%s: can't write 8bytes to I/O space\n", __FUNCTION__);
        else
                for (; c != 0; c--, addr += 8)
                        *(volatile uint32_t *)(addr) = v;
}


/*
 *      void bus_space_copy_region_N(bus_space_tag_t tag,
 *          bus_space_handle_t bsh1, bus_size_t off1,
 *          bus_space_handle_t bsh2, bus_size_t off2,
 *          size_t count);
 *
 * Copy `count' 1, 2, 4, or 8 byte values from bus space starting
 * at tag/bsh1/off1 to bus space starting at tag/bsh2/off2.
 */

static __inline void ia64_bus_space_copy_region_1(bus_space_tag_t,
        bus_space_handle_t, bus_size_t, bus_space_handle_t,
        bus_size_t, size_t);
static __inline void ia64_bus_space_copy_region_2(bus_space_tag_t,
        bus_space_handle_t, bus_size_t, bus_space_handle_t,
        bus_size_t, size_t);
static __inline void ia64_bus_space_copy_region_4(bus_space_tag_t,
        bus_space_handle_t, bus_size_t, bus_space_handle_t,
        bus_size_t, size_t);

#define bus_space_copy_region_1(t, h1, o1, h2, o2, c)                   \
        ia64_bus_space_copy_region_1((t), (h1), (o1), (h2), (o2), (c))

#define bus_space_copy_region_2(t, h1, o1, h2, o2, c)                   \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((h1) + (o1), uint16_t, "bus addr 1"); \
        __BUS_SPACE_ADDRESS_SANITY((h2) + (o2), uint16_t, "bus addr 2"); \
        ia64_bus_space_copy_region_2((t), (h1), (o1), (h2), (o2), (c)); \
} while (/* CONSTCOND */ 0)

#define bus_space_copy_region_4(t, h1, o1, h2, o2, c)                   \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((h1) + (o1), uint32_t, "bus addr 1"); \
        __BUS_SPACE_ADDRESS_SANITY((h2) + (o2), uint32_t, "bus addr 2"); \
        ia64_bus_space_copy_region_4((t), (h1), (o1), (h2), (o2), (c)); \
} while (/* CONSTCOND */ 0)

#define bus_space_copy_region_8(t, h1, o1, h2, o2, c)                   \
do {                                                                    \
        __BUS_SPACE_ADDRESS_SANITY((h1) + (o1), uint64_t, "bus addr 1"); \
        __BUS_SPACE_ADDRESS_SANITY((h2) + (o2), uint64_t, "bus addr 2"); \
        ia64_bus_space_copy_region_8((t), (h1), (o1), (h2), (o2), (c)); \
} while (/* CONSTCOND */ 0)

static __inline void
ia64_bus_space_copy_region_1(bus_space_tag_t t,
    bus_space_handle_t h1, bus_size_t o1,
    bus_space_handle_t h2, bus_size_t o2, size_t c)
{
        bus_addr_t addr1 = h1 + o1;
        bus_addr_t addr2 = h2 + o2;

        if (t == IA64_BUS_SPACE_IO) {
                if (addr1 >= addr2) {
                        /* src after dest: copy forward */
                        for (; c != 0; c--, addr1++, addr2++)
                                outb(addr2, inb(addr1));
                } else {
                        /* dest after src: copy backwards */
                        for (addr1 += (c - 1), addr2 += (c - 1);
                            c != 0; c--, addr1--, addr2--)
                                outb(addr2, inb(addr1));
                }
        } else {
                if (addr1 >= addr2) {
                        /* src after dest: copy forward */
                        for (; c != 0; c--, addr1++, addr2++)
                                *(volatile uint8_t *)(addr2) =
                                    *(volatile uint8_t *)(addr1);
                } else {
                        /* dest after src: copy backwards */
                        for (addr1 += (c - 1), addr2 += (c - 1);
                            c != 0; c--, addr1--, addr2--)
                                *(volatile uint8_t *)(addr2) =
                                    *(volatile uint8_t *)(addr1);
                }
        }
}

static __inline void
ia64_bus_space_copy_region_2(bus_space_tag_t t,
    bus_space_handle_t h1, bus_size_t o1,
    bus_space_handle_t h2, bus_size_t o2, size_t c)
{
        bus_addr_t addr1 = h1 + o1;
        bus_addr_t addr2 = h2 + o2;

        if (t == IA64_BUS_SPACE_IO) {
                if (addr1 >= addr2) {
                        /* src after dest: copy forward */
                        for (; c != 0; c--, addr1 += 2, addr2 += 2)
                                outw(addr2, inw(addr1));
                } else {
                        /* dest after src: copy backwards */
                        for (addr1 += 2 * (c - 1), addr2 += 2 * (c - 1);
                            c != 0; c--, addr1 -= 2, addr2 -= 2)
                                outw(addr2, inw(addr1));
                }
        } else {
                if (addr1 >= addr2) {
                        /* src after dest: copy forward */
                        for (; c != 0; c--, addr1 += 2, addr2 += 2)
                                *(volatile uint16_t *)(addr2) =
                                    *(volatile uint16_t *)(addr1);
                } else {
                        /* dest after src: copy backwards */
                        for (addr1 += 2 * (c - 1), addr2 += 2 * (c - 1);
                            c != 0; c--, addr1 -= 2, addr2 -= 2)
                                *(volatile uint16_t *)(addr2) =
                                    *(volatile uint16_t *)(addr1);
                }
        }
}

static __inline void
ia64_bus_space_copy_region_4(bus_space_tag_t t,
    bus_space_handle_t h1, bus_size_t o1,
    bus_space_handle_t h2, bus_size_t o2, size_t c)
{
        bus_addr_t addr1 = h1 + o1;
        bus_addr_t addr2 = h2 + o2;

        if (t == IA64_BUS_SPACE_IO) {
                if (addr1 >= addr2) {
                        /* src after dest: copy forward */
                        for (; c != 0; c--, addr1 += 4, addr2 += 4)
                                outl(addr2, inl(addr1));
                } else {
                        /* dest after src: copy backwards */
                        for (addr1 += 4 * (c - 1), addr2 += 4 * (c - 1);
                            c != 0; c--, addr1 -= 4, addr2 -= 4)
                                outl(addr2, inl(addr1));
                }
        } else {
                if (addr1 >= addr2) {
                        /* src after dest: copy forward */
                        for (; c != 0; c--, addr1 += 4, addr2 += 4)
                                *(volatile uint32_t *)(addr2) =
                                    *(volatile uint32_t *)(addr1);
                } else {
                        /* dest after src: copy backwards */
                        for (addr1 += 4 * (c - 1), addr2 += 4 * (c - 1);
                            c != 0; c--, addr1 -= 4, addr2 -= 4)
                                *(volatile uint32_t *)(addr2) =
                                    *(volatile uint32_t *)(addr1);
                }
        }
}

static __inline void
ia64_bus_space_copy_region_8(bus_space_tag_t t,
    bus_space_handle_t h1, bus_size_t o1,
    bus_space_handle_t h2, bus_size_t o2, size_t c)
{
        bus_addr_t addr1 = h1 + o1;
        bus_addr_t addr2 = h2 + o2;

        if (t == IA64_BUS_SPACE_IO) {
                printf("%s: can't write 8bytes to I/O space\n", __FUNCTION__);
        } else {
                if (addr1 >= addr2) {
                        /* src after dest: copy forward */
                        for (; c != 0; c--, addr1 += 8, addr2 += 8)
                                *(volatile uint64_t *)(addr2) =
                                    *(volatile uint64_t *)(addr1);
                } else {
                        /* dest after src: copy backwards */
                        for (addr1 += 8 * (c - 1), addr2 += 8 * (c - 1);
                            c != 0; c--, addr1 -= 8, addr2 -= 8)
                                *(volatile uint64_t *)(addr2) =
                                    *(volatile uint64_t *)(addr1);
                }
        }
}


/*
 * Bus read/write barrier methods.
 *
 *      void bus_space_barrier(bus_space_tag_t tag,
 *          bus_space_handle_t bsh, bus_size_t offset,
 *          bus_size_t len, int flags);
 *
 * Note: the x86 does not currently require barriers, but we must
 * provide the flags to MI code.
 */
#define bus_space_barrier(t, h, o, l, f)        \
        ia64_bus_space_barrier((t), (h), (o), (l), (f))

#define BUS_SPACE_BARRIER_READ  0x01
#define BUS_SPACE_BARRIER_WRITE 0x02

static __inline void
ia64_bus_space_barrier(bus_space_tag_t t, bus_space_handle_t handle,
    bus_size_t offset, bus_size_t length, int flags)
{
        if (t == IA64_BUS_SPACE_IO)
                return;

        switch (flags) {
        case BUS_SPACE_BARRIER_READ:
                __asm volatile("mf" ::: "memory");
                break;
        case BUS_SPACE_BARRIER_WRITE:
                __asm volatile("mf" ::: "memory");
                break;
        case BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE:
                __asm volatile("mf" ::: "memory");
                break;
        default:
                printf("%s: Unknown barrier %d\n", __FUNCTION__, flags);
                break;
        }
}


/*
 * Flags used in various bus DMA methods.
 */
#define BUS_DMA_WAITOK          0x000   /* safe to sleep (pseudo-flag) */
#define BUS_DMA_NOWAIT          0x001   /* not safe to sleep */
#define BUS_DMA_ALLOCNOW        0x002   /* perform resource allocation now */
#define BUS_DMA_COHERENT        0x004   /* hint: map memory DMA coherent */
#define BUS_DMA_STREAMING       0x008   /* hint: sequential, unidirectional */
#define BUS_DMA_BUS1            0x010   /* placeholders for bus functions... */
#define BUS_DMA_BUS2            0x020
#define BUS_DMA_BUS3            0x040
#define BUS_DMA_BUS4            0x080
#define BUS_DMA_READ            0x100   /* mapping is device -> memory only */
#define BUS_DMA_WRITE           0x200   /* mapping is memory -> device only */
#define BUS_DMA_NOCACHE         0x400   /* hint: map non-cached memory */

/* Forwards needed by prototypes below. */
struct mbuf;
struct uio;

/*
 * Operations performed by bus_dmamap_sync().
 */
#define BUS_DMASYNC_PREREAD     0x01    /* pre-read synchronization */
#define BUS_DMASYNC_POSTREAD    0x02    /* post-read synchronization */
#define BUS_DMASYNC_PREWRITE    0x04    /* pre-write synchronization */
#define BUS_DMASYNC_POSTWRITE   0x08    /* post-write synchronization */

typedef struct ia64_bus_dma_tag         *bus_dma_tag_t;
typedef struct ia64_bus_dmamap          *bus_dmamap_t;

#define BUS_DMA_TAG_VALID(t)    ((t) != (bus_dma_tag_t)0)

/*
 *      bus_dma_segment_t
 *
 *      Describes a single contiguous DMA transaction.  Values
 *      are suitable for programming into DMA registers.
 */
struct ia64_bus_dma_segment {
        bus_addr_t      ds_addr;        /* DMA address */
        bus_size_t      ds_len;         /* length of transfer */
};
typedef struct ia64_bus_dma_segment     bus_dma_segment_t;

/*
 *      bus_dma_tag_t
 *
 *      A machine-dependent opaque type describing the implementation of
 *      DMA for a given bus.
 */

struct ia64_bus_dma_tag {
        /*
         * The `bounce threshold' is checked while we are loading
         * the DMA map.  If the physical address of the segment
         * exceeds the threshold, an error will be returned.  The
         * caller can then take whatever action is necessary to
         * bounce the transfer.  If this value is 0, it will be
         * ignored.
         */
        bus_addr_t _bounce_thresh;
        bus_addr_t _bounce_alloc_lo;
        bus_addr_t _bounce_alloc_hi;
        int     (*_may_bounce)(bus_dma_tag_t, bus_dmamap_t, int, int *);

        /*
         * DMA mapping methods.
         */
        int     (*_dmamap_create)(bus_dma_tag_t, bus_size_t, int,
                    bus_size_t, bus_size_t, int, bus_dmamap_t *);
        void    (*_dmamap_destroy)(bus_dma_tag_t, bus_dmamap_t);
        int     (*_dmamap_load)(bus_dma_tag_t, bus_dmamap_t, void *,
                    bus_size_t, struct proc *, int);
        int     (*_dmamap_load_mbuf)(bus_dma_tag_t, bus_dmamap_t,
                    struct mbuf *, int);
        int     (*_dmamap_load_uio)(bus_dma_tag_t, bus_dmamap_t,
                    struct uio *, int);
        int     (*_dmamap_load_raw)(bus_dma_tag_t, bus_dmamap_t,
                    bus_dma_segment_t *, int, bus_size_t, int);
        void    (*_dmamap_unload)(bus_dma_tag_t, bus_dmamap_t);
        void    (*_dmamap_sync)(bus_dma_tag_t, bus_dmamap_t,
                    bus_addr_t, bus_size_t, int);

        /*
         * DMA memory utility functions.
         */
        int     (*_dmamem_alloc)(bus_dma_tag_t, bus_size_t, bus_size_t,
                    bus_size_t, bus_dma_segment_t *, int, int *, int);
        void    (*_dmamem_free)(bus_dma_tag_t, bus_dma_segment_t *, int);
        int     (*_dmamem_map)(bus_dma_tag_t, bus_dma_segment_t *,
                    int, size_t, void **, int);
        void    (*_dmamem_unmap)(bus_dma_tag_t, void *, size_t);
        paddr_t (*_dmamem_mmap)(bus_dma_tag_t, bus_dma_segment_t *,
                    int, off_t, int, int);
};

static __inline void bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t,
    bus_addr_t, bus_size_t, int) __attribute__((__unused__));

#define bus_dmamap_create(t, s, n, m, b, f, p)                  \
        (*(t)->_dmamap_create)((t), (s), (n), (m), (b), (f), (p))
#define bus_dmamap_destroy(t, p)                                \
        (*(t)->_dmamap_destroy)((t), (p))
#define bus_dmamap_load(t, m, b, s, p, f)                       \
        (*(t)->_dmamap_load)((t), (m), (b), (s), (p), (f))
#define bus_dmamap_load_mbuf(t, m, b, f)                        \
        (*(t)->_dmamap_load_mbuf)((t), (m), (b), (f))
#define bus_dmamap_load_uio(t, m, u, f)                         \
        (*(t)->_dmamap_load_uio)((t), (m), (u), (f))
#define bus_dmamap_load_raw(t, m, sg, n, s, f)                  \
        (*(t)->_dmamap_load_raw)((t), (m), (sg), (n), (s), (f))
#define bus_dmamap_unload(t, p)                                 \
        (*(t)->_dmamap_unload)((t), (p))
static __inline void
bus_dmamap_sync(bus_dma_tag_t t, bus_dmamap_t p, bus_addr_t o, bus_size_t l,
    int ops)
{
        /* if (ops & BUS_DMASYNC_POSTREAD)
           x86_lfence(); */
        if (t->_dmamap_sync)
                (*t->_dmamap_sync)(t, p, o, l, ops);
}

#define bus_dmamem_alloc(t, s, a, b, sg, n, r, f)               \
        (*(t)->_dmamem_alloc)((t), (s), (a), (b), (sg), (n), (r), (f))
#define bus_dmamem_free(t, sg, n)                               \
        (*(t)->_dmamem_free)((t), (sg), (n))
#define bus_dmamem_map(t, sg, n, s, k, f)                       \
        (*(t)->_dmamem_map)((t), (sg), (n), (s), (k), (f))
#define bus_dmamem_unmap(t, k, s)                               \
        (*(t)->_dmamem_unmap)((t), (k), (s))
#define bus_dmamem_mmap(t, sg, n, o, p, f)                      \
        (*(t)->_dmamem_mmap)((t), (sg), (n), (o), (p), (f))

/*
 *      bus_dmamap_t
 *
 *      Describes a DMA mapping.
 */
struct ia64_bus_dmamap {
        /*
         * PRIVATE MEMBERS: not for use by machine-independent code.
         */
        bus_size_t      _dm_size;       /* largest DMA transfer mappable */
        int             _dm_segcnt;     /* number of segs this map can map */
        bus_size_t      _dm_maxmaxsegsz; /* fixed largest possible segment */
        bus_size_t      _dm_boundary;   /* don't cross this */
        bus_addr_t      _dm_bounce_thresh; /* bounce threshold; see tag */
        int             _dm_flags;      /* misc. flags */

        void            *_dm_cookie;    /* cookie for bus-specific functions */

        /*
         * PUBLIC MEMBERS: these are used by machine-independent code.
         */
        bus_size_t      dm_maxsegsz;    /* largest possible segment */
        bus_size_t      dm_mapsize;     /* size of the mapping */
        int             dm_nsegs;       /* # valid segments in mapping */
        bus_dma_segment_t dm_segs[1];   /* segments; variable length */
};

#endif /* _IA64_BUS_H_ */