646 lines
20 KiB
C
646 lines
20 KiB
C
/* $NetBSD: bus.h,v 1.5 2001/03/07 22:42:17 thorpej Exp $ */
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/*
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* Copyright (c) 1996, 1997, 1998, 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _COBALT_BUS_H_
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#define _COBALT_BUS_H_
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#include <mips/locore.h>
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/*
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* Utility macros; do not use outside this file.
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*/
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#define __PB_TYPENAME_PREFIX(BITS) ___CONCAT(u_int,BITS)
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#define __PB_TYPENAME(BITS) ___CONCAT(__PB_TYPENAME_PREFIX(BITS),_t)
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/*
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* Bus address and size types
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*/
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typedef u_long bus_addr_t;
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typedef u_long bus_size_t;
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/*
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* Access methods for bus resources and address space.
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*/
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typedef int bus_space_tag_t;
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typedef u_long bus_space_handle_t;
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/*
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* int bus_space_map(bus_space_tag_t t, bus_addr_t addr,
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* bus_size_t size, int flags, bus_space_handle_t *bshp);
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*
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* Map a region of bus space.
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*/
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#define BUS_SPACE_MAP_CACHEABLE 0x01
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#define BUS_SPACE_MAP_LINEAR 0x02
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#define BUS_SPACE_MAP_PREFETCHABLE 0x04
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int bus_space_map(bus_space_tag_t, bus_addr_t, bus_size_t,
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int, bus_space_handle_t *);
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/*
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* void bus_space_unmap(bus_space_tag_t t,
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* bus_space_handle_t bsh, bus_size_t size);
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*
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* Unmap a region of bus space.
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*/
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void bus_space_unmap (bus_space_tag_t, bus_space_handle_t, bus_size_t);
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/*
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* int bus_space_subregion(bus_space_tag_t t,
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* bus_space_handle_t bsh, bus_size_t offset, bus_size_t size,
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* bus_space_handle_t *nbshp);
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*
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* Get a new handle for a subregion of an already-mapped area of bus space.
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*/
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int bus_space_subregion(bus_space_tag_t t, bus_space_handle_t bsh,
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bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp);
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/*
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* int bus_space_alloc(bus_space_tag_t t, bus_addr_t, rstart,
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* bus_addr_t rend, bus_size_t size, bus_size_t align,
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* bus_size_t boundary, int flags, bus_addr_t *addrp,
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* bus_space_handle_t *bshp);
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*
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* Allocate a region of bus space.
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*/
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int bus_space_alloc (bus_space_tag_t t, bus_addr_t rstart,
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bus_addr_t rend, bus_size_t size, bus_size_t align,
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bus_size_t boundary, int cacheable, bus_addr_t *addrp,
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bus_space_handle_t *bshp);
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/*
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* int bus_space_free (bus_space_tag_t t,
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* bus_space_handle_t bsh, bus_size_t size);
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*
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* Free a region of bus space.
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*/
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void bus_space_free(bus_space_tag_t t, bus_space_handle_t bsh,
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bus_size_t size);
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/*
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* u_intN_t bus_space_read_N(bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset);
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*
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* Read a 1, 2, 4, or 8 byte quantity from bus space
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* described by tag/handle/offset.
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*/
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#define bus_space_read_1(t, h, o) \
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((void) t, (*(volatile u_int8_t *)((h) + (o))))
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#define bus_space_read_2(t, h, o) \
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((void) t, (*(volatile u_int16_t *)((h) + (o))))
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#define bus_space_read_4(t, h, o) \
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((void) t, (*(volatile u_int32_t *)((h) + (o))))
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#if 0 /* Cause a link error for bus_space_read_8 */
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#define bus_space_read_8(t, h, o) !!! bus_space_read_8 unimplemented !!!
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#endif
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/*
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* void bus_space_read_multi_N(bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset,
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* u_intN_t *addr, size_t count);
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*
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* Read `count' 1, 2, 4, or 8 byte quantities from bus space
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* described by tag/handle/offset and copy into buffer provided.
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*/
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#define __COBALT_bus_space_read_multi(BYTES,BITS) \
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static __inline void __CONCAT(bus_space_read_multi_,BYTES) \
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(bus_space_tag_t, bus_space_handle_t, bus_size_t, \
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__PB_TYPENAME(BITS) *, size_t); \
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\
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static __inline void \
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__CONCAT(bus_space_read_multi_,BYTES)(t, h, o, a, c) \
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bus_space_tag_t t; \
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bus_space_handle_t h; \
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bus_size_t o; \
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__PB_TYPENAME(BITS) *a; \
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size_t c; \
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{ \
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\
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while (c--) \
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*a++ = __CONCAT(bus_space_read_,BYTES)(t, h, o); \
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}
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__COBALT_bus_space_read_multi(1,8)
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__COBALT_bus_space_read_multi(2,16)
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__COBALT_bus_space_read_multi(4,32)
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#if 0 /* Cause a link error for bus_space_read_multi_8 */
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#define bus_space_read_multi_8 !!! bus_space_read_multi_8 unimplemented !!!
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#endif
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#undef __COBALT_bus_space_read_multi
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/*
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* void bus_space_read_region_N(bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset,
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* u_intN_t *addr, size_t count);
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*
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* Read `count' 1, 2, 4, or 8 byte quantities from bus space
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* described by tag/handle and starting at `offset' and copy into
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* buffer provided.
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*/
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#define __COBALT_bus_space_read_region(BYTES,BITS) \
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static __inline void __CONCAT(bus_space_read_region_,BYTES) \
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(bus_space_tag_t, bus_space_handle_t, bus_size_t, \
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__PB_TYPENAME(BITS) *, size_t); \
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\
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static __inline void \
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__CONCAT(bus_space_read_region_,BYTES)(t, h, o, a, c) \
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bus_space_tag_t t; \
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bus_space_handle_t h; \
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bus_size_t o; \
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__PB_TYPENAME(BITS) *a; \
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size_t c; \
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{ \
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\
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while (c--) { \
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*a++ = __CONCAT(bus_space_read_,BYTES)(t, h, o); \
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o += BYTES; \
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} \
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}
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__COBALT_bus_space_read_region(1,8)
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__COBALT_bus_space_read_region(2,16)
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__COBALT_bus_space_read_region(4,32)
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#if 0 /* Cause a link error for bus_space_read_region_8 */
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#define bus_space_read_region_8 !!! bus_space_read_region_8 unimplemented !!!
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#endif
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#undef __COBALT_bus_space_read_region
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/*
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* void bus_space_write_N(bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset,
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* u_intN_t value);
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*
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* Write the 1, 2, 4, or 8 byte value `value' to bus space
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* described by tag/handle/offset.
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*/
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#define bus_space_write_1(t, h, o, v) \
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do { \
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(void) t; \
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*(volatile u_int8_t *)((h) + (o)) = (v); \
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} while (0)
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#define bus_space_write_2(t, h, o, v) \
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do { \
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(void) t; \
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*(volatile u_int16_t *)((h) + (o)) = (v); \
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} while (0)
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#define bus_space_write_4(t, h, o, v) \
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do { \
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(void) t; \
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*(volatile u_int32_t *)((h) + (o)) = (v); \
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} while (0)
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#if 0 /* Cause a link error for bus_space_write_8 */
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#define bus_space_write_8 !!! bus_space_write_8 not implemented !!!
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#endif
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/*
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* void bus_space_write_multi_N(bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset,
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* const u_intN_t *addr, size_t count);
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*
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* Write `count' 1, 2, 4, or 8 byte quantities from the buffer
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* provided to bus space described by tag/handle/offset.
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*/
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#define __COBALT_bus_space_write_multi(BYTES,BITS) \
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static __inline void __CONCAT(bus_space_write_multi_,BYTES) \
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(bus_space_tag_t, bus_space_handle_t, bus_size_t, \
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const __PB_TYPENAME(BITS) *, size_t); \
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\
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static __inline void \
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__CONCAT(bus_space_write_multi_,BYTES)(t, h, o, a, c) \
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bus_space_tag_t t; \
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bus_space_handle_t h; \
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bus_size_t o; \
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const __PB_TYPENAME(BITS) *a; \
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size_t c; \
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{ \
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\
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while (c--) \
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__CONCAT(bus_space_write_,BYTES)(t, h, o, *a++); \
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}
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__COBALT_bus_space_write_multi(1,8)
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__COBALT_bus_space_write_multi(2,16)
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__COBALT_bus_space_write_multi(4,32)
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#if 0 /* Cause a link error for bus_space_write_8 */
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#define bus_space_write_multi_8(t, h, o, a, c) \
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!!! bus_space_write_multi_8 unimplimented !!!
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#endif
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#undef __COBALT_bus_space_write_multi
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/*
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* void bus_space_write_region_N(bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset,
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* const u_intN_t *addr, size_t count);
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*
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* Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided
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* to bus space described by tag/handle starting at `offset'.
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*/
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#define __COBALT_bus_space_write_region(BYTES,BITS) \
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static __inline void __CONCAT(bus_space_write_region_,BYTES) \
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(bus_space_tag_t, bus_space_handle_t, bus_size_t, \
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const __PB_TYPENAME(BITS) *, size_t); \
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\
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static __inline void \
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__CONCAT(bus_space_write_region_,BYTES)(t, h, o, a, c) \
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bus_space_tag_t t; \
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bus_space_handle_t h; \
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bus_size_t o; \
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const __PB_TYPENAME(BITS) *a; \
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size_t c; \
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{ \
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\
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while (c--) { \
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__CONCAT(bus_space_write_,BYTES)(t, h, o, *a++); \
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o += BYTES; \
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} \
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}
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__COBALT_bus_space_write_region(1,8)
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__COBALT_bus_space_write_region(2,16)
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__COBALT_bus_space_write_region(4,32)
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#if 0 /* Cause a link error for bus_space_write_region_8 */
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#define bus_space_write_region_8 \
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!!! bus_space_write_region_8 unimplemented !!!
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#endif
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#undef __COBALT_bus_space_write_region
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/*
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* void bus_space_set_multi_N(bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset, u_intN_t val,
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* size_t count);
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*
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* Write the 1, 2, 4, or 8 byte value `val' to bus space described
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* by tag/handle/offset `count' times.
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*/
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#define __COBALT_bus_space_set_multi(BYTES,BITS) \
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static __inline void __CONCAT(bus_space_set_multi_,BYTES) \
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(bus_space_tag_t, bus_space_handle_t, bus_size_t, \
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__PB_TYPENAME(BITS), size_t); \
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\
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static __inline void \
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__CONCAT(bus_space_set_multi_,BYTES)(t, h, o, v, c) \
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bus_space_tag_t t; \
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bus_space_handle_t h; \
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bus_size_t o; \
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__PB_TYPENAME(BITS) v; \
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size_t c; \
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{ \
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\
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while (c--) \
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__CONCAT(bus_space_write_,BYTES)(t, h, o, v); \
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}
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__COBALT_bus_space_set_multi(1,8)
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__COBALT_bus_space_set_multi(2,16)
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__COBALT_bus_space_set_multi(4,32)
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#if 0 /* Cause a link error for bus_space_set_multi_8 */
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#define bus_space_set_multi_8 \
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!!! bus_space_set_multi_8 unimplemented !!!
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#endif
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#undef __COBALT_bus_space_set_multi
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/*
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* void bus_space_set_region_N(bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset, u_intN_t val,
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* size_t count);
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*
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* Write `count' 1, 2, 4, or 8 byte value `val' to bus space described
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* by tag/handle starting at `offset'.
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*/
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#define __COBALT_bus_space_set_region(BYTES,BITS) \
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static __inline void __CONCAT(bus_space_set_region_,BYTES) \
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(bus_space_tag_t, bus_space_handle_t, bus_size_t, \
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__PB_TYPENAME(BITS), size_t); \
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\
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static __inline void \
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__CONCAT(bus_space_set_region_,BYTES)(t, h, o, v, c) \
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bus_space_tag_t t; \
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bus_space_handle_t h; \
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bus_size_t o; \
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__PB_TYPENAME(BITS) v; \
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size_t c; \
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{ \
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\
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while (c--) { \
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__CONCAT(bus_space_write_,BYTES)(t, h, o, v); \
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o += BYTES; \
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} \
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}
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__COBALT_bus_space_set_region(1,8)
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__COBALT_bus_space_set_region(2,16)
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__COBALT_bus_space_set_region(4,32)
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#if 0 /* Cause a link error for bus_space_set_region_8 */
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#define bus_space_set_region_8 \
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!!! bus_space_set_region_8 unimplemented !!!
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#endif
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#undef __COBALT_bus_space_set_region
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/*
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* void bus_space_copy_region_N(bus_space_tag_t tag,
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* bus_space_handle_t bsh1, bus_size_t off1,
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* bus_space_handle_t bsh2, bus_size_t off2,
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* bus_size_t count);
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*
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* Copy `count' 1, 2, 4, or 8 byte values from bus space starting
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* at tag/bsh1/off1 to bus space starting at tag/bsh2/off2.
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*/
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#define __COBALT_copy_region(BYTES) \
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static __inline void __CONCAT(bus_space_copy_region_,BYTES) \
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(bus_space_tag_t, \
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bus_space_handle_t bsh1, bus_size_t off1, \
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bus_space_handle_t bsh2, bus_size_t off2, \
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bus_size_t count); \
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\
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static __inline void \
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__CONCAT(bus_space_copy_region_,BYTES)(t, h1, o1, h2, o2, c) \
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bus_space_tag_t t; \
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bus_space_handle_t h1, h2; \
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bus_size_t o1, o2, c; \
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{ \
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bus_size_t o; \
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\
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if ((h1 + o1) >= (h2 + o2)) { \
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/* src after dest: copy forward */ \
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for (o = 0; c != 0; c--, o += BYTES) \
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__CONCAT(bus_space_write_,BYTES)(t, h2, o2 + o, \
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__CONCAT(bus_space_read_,BYTES)(t, h1, o1 + o)); \
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} else { \
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/* dest after src: copy backwards */ \
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for (o = (c - 1) * BYTES; c != 0; c--, o -= BYTES) \
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__CONCAT(bus_space_write_,BYTES)(t, h2, o2 + o, \
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__CONCAT(bus_space_read_,BYTES)(t, h1, o1 + o)); \
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} \
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}
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__COBALT_copy_region(1)
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__COBALT_copy_region(2)
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__COBALT_copy_region(4)
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#if 0 /* Cause a link error for bus_space_copy_region_8 */
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#define bus_space_copy_region_8 \
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!!! bus_space_copy_region_8 unimplemented !!!
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#endif
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#undef __COBALT_copy_region
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/*
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* Bus read/write barrier methods.
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*
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* void bus_space_barrier(bus_space_tag_t tag,
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* bus_space_handle_t bsh, bus_size_t offset,
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* bus_size_t len, int flags);
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*
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* On the MIPS, we just flush the write buffer.
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*/
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#define bus_space_barrier(t, h, o, l, f) \
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((void)((void)(t), (void)(h), (void)(o), (void)(l), (void)(f)), \
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wbflush())
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#define BUS_SPACE_BARRIER_READ 0x01 /* force read barrier */
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#define BUS_SPACE_BARRIER_WRITE 0x02 /* force write barrier */
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#undef __PB_TYPENAME_PREFIX
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#undef __PB_TYPENAME
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#define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t)
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/*
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* Flags used in various bus DMA methods.
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*/
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#define BUS_DMA_WAITOK 0x00 /* safe to sleep (pseudo-flag) */
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#define BUS_DMA_NOWAIT 0x01 /* not safe to sleep */
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#define BUS_DMA_ALLOCNOW 0x02 /* perform resource allocation now */
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#define BUS_DMA_COHERENT 0x04 /* hint: map memory DMA coherent */
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#define BUS_DMA_STREAMING 0x08 /* hint: sequential, unidirectional */
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#define BUS_DMA_BUS1 0x10 /* placeholders for bus functions... */
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#define BUS_DMA_BUS2 0x20
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#define BUS_DMA_BUS3 0x40
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#define BUS_DMA_BUS4 0x80
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#define COBALT_DMAMAP_COHERENT 0x100 /* no cache flush necessary on sync */
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/* Forwards needed by prototypes below. */
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struct mbuf;
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struct uio;
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/*
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* Operations performed by bus_dmamap_sync().
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*/
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#define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */
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#define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */
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#define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */
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#define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */
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typedef struct cobalt_bus_dma_tag *bus_dma_tag_t;
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typedef struct cobalt_bus_dmamap *bus_dmamap_t;
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/*
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* bus_dma_segment_t
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*
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* Describes a single contiguous DMA transaction. Values
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* are suitable for programming into DMA registers.
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*/
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struct cobalt_bus_dma_segment {
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bus_addr_t ds_addr; /* DMA address */
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bus_size_t ds_len; /* length of transfer */
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bus_addr_t _ds_vaddr; /* virtual address, 0 if invalid */
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};
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typedef struct cobalt_bus_dma_segment bus_dma_segment_t;
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/*
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* bus_dma_tag_t
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*
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* A machine-dependent opaque type describing the implementation of
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* DMA for a given bus.
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*/
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struct cobalt_bus_dma_tag {
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/*
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* DMA mapping methods.
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*/
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int (*_dmamap_create)(bus_dma_tag_t, bus_size_t, int,
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bus_size_t, bus_size_t, int, bus_dmamap_t *);
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void (*_dmamap_destroy)(bus_dma_tag_t, bus_dmamap_t);
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int (*_dmamap_load)(bus_dma_tag_t, bus_dmamap_t, void *,
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bus_size_t, struct proc *, int);
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int (*_dmamap_load_mbuf)(bus_dma_tag_t, bus_dmamap_t,
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struct mbuf *, int);
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int (*_dmamap_load_uio)(bus_dma_tag_t, bus_dmamap_t,
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struct uio *, int);
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int (*_dmamap_load_raw)(bus_dma_tag_t, bus_dmamap_t,
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bus_dma_segment_t *, int, bus_size_t, int);
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void (*_dmamap_unload)(bus_dma_tag_t, bus_dmamap_t);
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void (*_dmamap_sync)(bus_dma_tag_t, bus_dmamap_t,
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bus_addr_t, bus_size_t, int);
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/*
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* DMA memory utility functions.
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*/
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int (*_dmamem_alloc)(bus_dma_tag_t, bus_size_t, bus_size_t,
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bus_size_t, bus_dma_segment_t *, int, int *, int);
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void (*_dmamem_free)(bus_dma_tag_t,
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bus_dma_segment_t *, int);
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int (*_dmamem_map)(bus_dma_tag_t, bus_dma_segment_t *,
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int, size_t, caddr_t *, int);
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void (*_dmamem_unmap)(bus_dma_tag_t, caddr_t, size_t);
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paddr_t (*_dmamem_mmap)(bus_dma_tag_t, bus_dma_segment_t *,
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int, off_t, int, int);
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};
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#define bus_dmamap_create(t, s, n, m, b, f, p) \
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(*(t)->_dmamap_create)((t), (s), (n), (m), (b), (f), (p))
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#define bus_dmamap_destroy(t, p) \
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(*(t)->_dmamap_destroy)((t), (p))
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#define bus_dmamap_load(t, m, b, s, p, f) \
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(*(t)->_dmamap_load)((t), (m), (b), (s), (p), (f))
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#define bus_dmamap_load_mbuf(t, m, b, f) \
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(*(t)->_dmamap_load_mbuf)((t), (m), (b), (f))
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#define bus_dmamap_load_uio(t, m, u, f) \
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(*(t)->_dmamap_load_uio)((t), (m), (u), (f))
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#define bus_dmamap_load_raw(t, m, sg, n, s, f) \
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(*(t)->_dmamap_load_raw)((t), (m), (sg), (n), (s), (f))
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#define bus_dmamap_unload(t, p) \
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(*(t)->_dmamap_unload)((t), (p))
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#define bus_dmamap_sync(t, p, o, l, ops) \
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(*(t)->_dmamap_sync)((t), (p), (o), (l), (ops))
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#define bus_dmamem_alloc(t, s, a, b, sg, n, r, f) \
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(*(t)->_dmamem_alloc)((t), (s), (a), (b), (sg), (n), (r), (f))
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#define bus_dmamem_free(t, sg, n) \
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(*(t)->_dmamem_free)((t), (sg), (n))
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#define bus_dmamem_map(t, sg, n, s, k, f) \
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(*(t)->_dmamem_map)((t), (sg), (n), (s), (k), (f))
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#define bus_dmamem_unmap(t, k, s) \
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(*(t)->_dmamem_unmap)((t), (k), (s))
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#define bus_dmamem_mmap(t, sg, n, o, p, f) \
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(*(t)->_dmamem_mmap)((t), (sg), (n), (o), (p), (f))
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/*
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* bus_dmamap_t
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*
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* Describes a DMA mapping.
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*/
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struct cobalt_bus_dmamap {
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/*
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* PRIVATE MEMBERS: not for use my machine-independent code.
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*/
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bus_size_t _dm_size; /* largest DMA transfer mappable */
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int _dm_segcnt; /* number of segs this map can map */
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bus_size_t _dm_maxsegsz; /* largest possible segment */
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bus_size_t _dm_boundary; /* don't cross this */
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int _dm_flags; /* misc. flags */
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/*
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* PUBLIC MEMBERS: these are used by machine-independent code.
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*/
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bus_size_t dm_mapsize; /* size of the mapping */
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int dm_nsegs; /* # valid segments in mapping */
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bus_dma_segment_t dm_segs[1]; /* segments; variable length */
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};
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#ifdef _COBALT_BUS_DMA_PRIVATE
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int _bus_dmamap_create(bus_dma_tag_t, bus_size_t, int, bus_size_t,
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bus_size_t, int, bus_dmamap_t *);
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void _bus_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t);
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int _bus_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *,
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bus_size_t, struct proc *, int);
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int _bus_dmamap_load_mbuf(bus_dma_tag_t, bus_dmamap_t,
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struct mbuf *, int);
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int _bus_dmamap_load_uio(bus_dma_tag_t, bus_dmamap_t,
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struct uio *, int);
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int _bus_dmamap_load_raw(bus_dma_tag_t, bus_dmamap_t,
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bus_dma_segment_t *, int, bus_size_t, int);
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void _bus_dmamap_unload(bus_dma_tag_t, bus_dmamap_t);
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void _bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
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bus_size_t, int);
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int _bus_dmamem_alloc(bus_dma_tag_t tag, bus_size_t size,
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bus_size_t alignment, bus_size_t boundary,
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bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags);
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void _bus_dmamem_free(bus_dma_tag_t tag, bus_dma_segment_t *segs,
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int nsegs);
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int _bus_dmamem_map(bus_dma_tag_t tag, bus_dma_segment_t *segs,
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int nsegs, size_t size, caddr_t *kvap, int flags);
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void _bus_dmamem_unmap(bus_dma_tag_t tag, caddr_t kva,
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size_t size);
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paddr_t _bus_dmamem_mmap(bus_dma_tag_t tag, bus_dma_segment_t *segs,
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int nsegs, off_t off, int prot, int flags);
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int _bus_dmamem_alloc_range(bus_dma_tag_t tag, bus_size_t size,
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bus_size_t alignment, bus_size_t boundary,
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bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags,
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vaddr_t low, vaddr_t high);
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extern struct cobalt_bus_dma_tag cobalt_default_bus_dma_tag;
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#endif /* _COBALT_BUS_DMA_PRIVATE */
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#endif /* _COBALT_BUS_H_ */
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