799 lines
24 KiB
C
799 lines
24 KiB
C
/*-
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* Copyright (c) 1996, 1997, 1998 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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/*
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* Copyright (c) 1996 Charles M. Hannum. All rights reserved.
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* Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
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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 Christopher G. Demetriou
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* for the NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $NetBSD: bus.h,v 1.9.4.1 2000/06/30 16:27:30 simonb Exp $
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* $FreeBSD$
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*/
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#ifndef _MACPPC_BUS_H_
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#define _MACPPC_BUS_H_
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#include <machine/pio.h>
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/*
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* Values for the macppc bus space tag, not to be used directly by MI code.
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*/
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#define __BUS_SPACE_HAS_STREAM_METHODS
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#define MACPPC_BUS_ADDR_MASK 0xfffff000
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#define MACPPC_BUS_STRIDE_MASK 0x0000000f
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#define macppc_make_bus_space_tag(addr, stride) \
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(((addr) & MACPPC_BUS_ADDR_MASK) | (stride))
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#define __BA(t, h, o) ((void *)((h) + ((o) << ((t) & MACPPC_BUS_STRIDE_MASK))))
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/*
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* Bus address and size types
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*/
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typedef u_int32_t bus_addr_t;
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typedef u_int32_t 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 u_int32_t bus_space_tag_t;
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typedef u_int32_t 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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extern void *mapiodev(vm_offset_t, vm_size_t);
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static __inline int
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bus_space_map(bus_space_tag_t t, bus_addr_t addr, bus_size_t size, int flags,
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bus_space_handle_t *bshp)
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{
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vm_offset_t base = t & MACPPC_BUS_ADDR_MASK;
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int stride = t & MACPPC_BUS_STRIDE_MASK;
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*bshp = (bus_space_handle_t)
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mapiodev(base + (addr << stride), size << stride);
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return 0;
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}
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/*
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* int 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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#define bus_space_unmap(t, bsh, size)
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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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#define bus_space_subregion(t, bsh, offset, size, bshp) \
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((*(bshp) = (bus_space_handle_t)__BA(t, bsh, offset)), 0)
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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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#if 0
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#define bus_space_alloc(t, rs, re, s, a, b, f, ap, hp) !!! unimplemented !!!
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#endif
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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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#if 0
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#define bus_space_free(t, h, s) !!! unimplemented !!!
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#endif
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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) (in8(__BA(t, h, o)))
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#define bus_space_read_2(t, h, o) (in16rb(__BA(t, h, o)))
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#define bus_space_read_4(t, h, o) (in32rb(__BA(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) !!! unimplemented !!!
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#endif
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#define bus_space_read_stream_1(t, h, o) (in8(__BA(t, h, o)))
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#define bus_space_read_stream_2(t, h, o) (in16(__BA(t, h, o)))
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#define bus_space_read_stream_4(t, h, o) (in32(__BA(t, h, o)))
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#if 0 /* Cause a link error for bus_space_read_stream_8 */
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#define bus_space_read_8(t, h, o) !!! 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 bus_space_read_multi_1(t, h, o, a, c) do { \
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ins8(__BA(t, h, o), (a), (c)); \
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} while (0)
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#define bus_space_read_multi_2(t, h, o, a, c) do { \
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ins16rb(__BA(t, h, o), (a), (c)); \
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} while (0)
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#define bus_space_read_multi_4(t, h, o, a, c) do { \
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ins32rb(__BA(t, h, o), (a), (c)); \
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} while (0)
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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 !!! unimplemented !!!
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#endif
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#define bus_space_read_multi_stream_1(t, h, o, a, c) do { \
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ins8(__BA(t, h, o), (a), (c)); \
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} while (0)
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#define bus_space_read_multi_stream_2(t, h, o, a, c) do { \
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ins16(__BA(t, h, o), (a), (c)); \
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} while (0)
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#define bus_space_read_multi_stream_4(t, h, o, a, c) do { \
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ins32(__BA(t, h, o), (a), (c)); \
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} while (0)
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#if 0 /* Cause a link error for bus_space_read_multi_stream_8 */
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#define bus_space_read_multi_stream_8 !!! unimplemented !!!
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#endif
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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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static __inline void
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bus_space_read_region_1(bus_space_tag_t tag, bus_space_handle_t bsh,
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bus_size_t offset, u_int8_t *addr, size_t count)
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{
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volatile u_int8_t *s = __BA(tag, bsh, offset);
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while (count--)
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*addr++ = *s++;
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__asm __volatile("eieio; sync");
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}
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static __inline void
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bus_space_read_region_2(bus_space_tag_t tag, bus_space_handle_t bsh,
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bus_size_t offset, u_int16_t *addr, size_t count)
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{
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volatile u_int16_t *s = __BA(tag, bsh, offset);
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while (count--)
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__asm __volatile("lhbrx %0, 0, %1" :
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"=r"(*addr++) : "r"(s++));
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__asm __volatile("eieio; sync");
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}
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static __inline void
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bus_space_read_region_4(bus_space_tag_t tag, bus_space_handle_t bsh,
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bus_size_t offset, u_int32_t *addr, size_t count)
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{
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volatile u_int32_t *s = __BA(tag, bsh, offset);
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while (count--)
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__asm __volatile("lwbrx %0, 0, %1" :
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"=r"(*addr++) : "r"(s++));
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__asm __volatile("eieio; sync");
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}
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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 !!! unimplemented !!!
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#endif
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static __inline void
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bus_space_read_region_stream_2(bus_space_tag_t tag, bus_space_handle_t bsh,
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bus_size_t offset, u_int16_t *addr, size_t count)
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{
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volatile u_int16_t *s = __BA(tag, bsh, offset);
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while (count--)
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*addr++ = *s++;
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__asm __volatile("eieio; sync");
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}
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static __inline void
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bus_space_read_region_stream_4(bus_space_tag_t tag, bus_space_handle_t bsh,
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bus_size_t offset, u_int32_t *addr, size_t count)
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{
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volatile u_int32_t *s = __BA(tag, bsh, offset);
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while (count--)
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*addr++ = *s++;
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__asm __volatile("eieio; sync");
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}
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#if 0 /* Cause a link error */
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#define bus_space_read_region_stream_8 !!! unimplemented !!!
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#endif
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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) out8(__BA(t, h, o), (v))
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#define bus_space_write_2(t, h, o, v) out16rb(__BA(t, h, o), (v))
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#define bus_space_write_4(t, h, o, v) out32rb(__BA(t, h, o), (v))
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#define bus_space_write_stream_1(t, h, o, v) out8(__BA(t, h, o), (v))
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#define bus_space_write_stream_2(t, h, o, v) out16(__BA(t, h, o), (v))
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#define bus_space_write_stream_4(t, h, o, v) out32(__BA(t, h, o), (v))
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#if 0 /* Cause a link error for bus_space_write_8 */
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#define bus_space_write_8 !!! unimplemented !!!
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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 bus_space_write_multi_1(t, h, o, a, c) do { \
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outsb(__BA(t, h, o), (a), (c)); \
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} while (0)
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#define bus_space_write_multi_2(t, h, o, a, c) do { \
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outsw(__BA(t, h, o), (a), (c)); \
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} while (0)
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#define bus_space_write_multi_4(t, h, o, a, c) do { \
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outsl(__BA(t, h, o), (a), (c)); \
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} while (0)
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#if 0
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#define bus_space_write_multi_8 !!! unimplemented !!!
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#endif
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#define bus_space_write_multi_stream_2(t, h, o, a, c) do { \
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outsw(__BA(t, h, o), (a), (c)); \
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} while (0)
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#define bus_space_write_multi_stream_4(t, h, o, a, c) do { \
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outsl(__BA(t, h, o), (a), (c)); \
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} while (0)
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#if 0
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#define bus_space_write_multi_stream_8 !!! unimplemented !!!
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#endif
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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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static __inline void
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bus_space_write_region_1(bus_space_tag_t tag, bus_space_handle_t bsh,
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bus_size_t offset, const u_int8_t *addr, size_t count)
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{
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volatile u_int8_t *d = __BA(tag, bsh, offset);
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while (count--)
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*d++ = *addr++;
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__asm __volatile("eieio; sync");
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}
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static __inline void
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bus_space_write_region_2(bus_space_tag_t tag, bus_space_handle_t bsh,
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bus_size_t offset, const u_int16_t *addr, size_t count)
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{
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volatile u_int16_t *d = __BA(tag, bsh, offset);
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while (count--)
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__asm __volatile("sthbrx %0, 0, %1" ::
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"r"(*addr++), "r"(d++));
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__asm __volatile("eieio; sync");
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}
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static __inline void
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bus_space_write_region_4(bus_space_tag_t tag, bus_space_handle_t bsh,
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bus_size_t offset, const u_int32_t *addr, size_t count)
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{
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volatile u_int32_t *d = __BA(tag, bsh, offset);
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while (count--)
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__asm __volatile("stwbrx %0, 0, %1" ::
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"r"(*addr++), "r"(d++));
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__asm __volatile("eieio; sync");
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}
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#if 0
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#define bus_space_write_region_8 !!! bus_space_write_region_8 unimplemented !!!
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#endif
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static __inline void
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bus_space_write_region_stream_2(bus_space_tag_t tag, bus_space_handle_t bsh,
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bus_size_t offset, const u_int16_t *addr, size_t count)
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{
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volatile u_int16_t *d = __BA(tag, bsh, offset);
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while (count--)
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*d++ = *addr++;
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__asm __volatile("eieio; sync");
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}
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static __inline void
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bus_space_write_region_stream_4(bus_space_tag_t tag, bus_space_handle_t bsh,
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bus_size_t offset, const u_int32_t *addr, size_t count)
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{
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volatile u_int32_t *d = __BA(tag, bsh, offset);
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while (count--)
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*d++ = *addr++;
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__asm __volatile("eieio; sync");
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}
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#if 0
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#define bus_space_write_region_stream_8 !!! unimplemented !!!
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#endif
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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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static __inline void
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bus_space_set_multi_1(bus_space_tag_t tag, bus_space_handle_t bsh,
|
|
bus_size_t offset, u_int8_t val, size_t count)
|
|
{
|
|
volatile u_int8_t *d = __BA(tag, bsh, offset);
|
|
|
|
while (count--)
|
|
*d = val;
|
|
__asm __volatile("eieio; sync");
|
|
}
|
|
|
|
static __inline void
|
|
bus_space_set_multi_2(bus_space_tag_t tag, bus_space_handle_t bsh,
|
|
bus_size_t offset, u_int16_t val, size_t count)
|
|
{
|
|
volatile u_int16_t *d = __BA(tag, bsh, offset);
|
|
|
|
while (count--)
|
|
__asm __volatile("sthbrx %0, 0, %1" ::
|
|
"r"(val), "r"(d));
|
|
__asm __volatile("eieio; sync");
|
|
}
|
|
|
|
static __inline void
|
|
bus_space_set_multi_4(bus_space_tag_t tag, bus_space_handle_t bsh,
|
|
bus_size_t offset, u_int32_t val, size_t count)
|
|
{
|
|
volatile u_int32_t *d = __BA(tag, bsh, offset);
|
|
|
|
while (count--)
|
|
__asm __volatile("stwbrx %0, 0, %1" ::
|
|
"r"(val), "r"(d));
|
|
__asm __volatile("eieio; sync");
|
|
}
|
|
|
|
#if 0
|
|
#define bus_space_set_multi_8 !!! bus_space_set_multi_8 unimplemented !!!
|
|
#endif
|
|
|
|
static __inline void
|
|
bus_space_set_multi_stream_2(bus_space_tag_t tag, bus_space_handle_t bsh,
|
|
bus_size_t offset, u_int16_t val, size_t count)
|
|
{
|
|
volatile u_int16_t *d = __BA(tag, bsh, offset);
|
|
|
|
while (count--)
|
|
*d = val;
|
|
__asm __volatile("eieio; sync");
|
|
}
|
|
|
|
static __inline void
|
|
bus_space_set_multi_stream_4(bus_space_tag_t tag, bus_space_handle_t bsh,
|
|
bus_size_t offset, u_int32_t val, size_t count)
|
|
{
|
|
volatile u_int32_t *d = __BA(tag, bsh, offset);
|
|
|
|
while (count--)
|
|
*d = val;
|
|
__asm __volatile("eieio; sync");
|
|
}
|
|
|
|
#if 0
|
|
#define bus_space_set_multi_stream_8 !!! unimplemented !!!
|
|
#endif
|
|
|
|
/*
|
|
* void bus_space_set_region_N(bus_space_tag_t tag,
|
|
* bus_space_handle_t bsh, bus_size_t offset, u_intN_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
|
|
bus_space_set_region_1(bus_space_tag_t tag, bus_space_handle_t bsh,
|
|
bus_size_t offset, u_int8_t val, size_t count)
|
|
{
|
|
volatile u_int8_t *d = __BA(tag, bsh, offset);
|
|
|
|
while (count--)
|
|
*d++ = val;
|
|
__asm __volatile("eieio; sync");
|
|
}
|
|
|
|
static __inline void
|
|
bus_space_set_region_2(bus_space_tag_t tag, bus_space_handle_t bsh,
|
|
bus_size_t offset, u_int16_t val, size_t count)
|
|
{
|
|
volatile u_int16_t *d = __BA(tag, bsh, offset);
|
|
|
|
while (count--)
|
|
__asm __volatile("sthbrx %0, 0, %1" ::
|
|
"r"(val), "r"(d++));
|
|
__asm __volatile("eieio; sync");
|
|
}
|
|
|
|
static __inline void
|
|
bus_space_set_region_4(bus_space_tag_t tag, bus_space_handle_t bsh,
|
|
bus_size_t offset, u_int32_t val, size_t count)
|
|
{
|
|
volatile u_int32_t *d = __BA(tag, bsh, offset);
|
|
|
|
while (count--)
|
|
__asm __volatile("stwbrx %0, 0, %1" ::
|
|
"r"(val), "r"(d++));
|
|
__asm __volatile("eieio; sync");
|
|
}
|
|
|
|
#if 0
|
|
#define bus_space_set_region_8 !!! bus_space_set_region_8 unimplemented !!!
|
|
#endif
|
|
|
|
static __inline void
|
|
bus_space_set_region_stream_2(bus_space_tag_t tag, bus_space_handle_t bsh,
|
|
bus_size_t offset, u_int16_t val, size_t count)
|
|
{
|
|
volatile u_int16_t *d = __BA(tag, bsh, offset);
|
|
|
|
while (count--)
|
|
*d++ = val;
|
|
__asm __volatile("eieio; sync");
|
|
}
|
|
|
|
static __inline void
|
|
bus_space_set_region_stream_4(bus_space_tag_t tag, bus_space_handle_t bsh,
|
|
bus_size_t offset, u_int32_t val, size_t count)
|
|
{
|
|
volatile u_int32_t *d = __BA(tag, bsh, offset);
|
|
|
|
while (count--)
|
|
*d++ = val;
|
|
__asm __volatile("eieio; sync");
|
|
}
|
|
|
|
#if 0
|
|
#define bus_space_set_region_stream_8 !!! unimplemented !!!
|
|
#endif
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
/* XXX IMPLEMENT bus_space_copy_N() XXX */
|
|
|
|
/*
|
|
* 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 macppc does not currently require barriers, but we must
|
|
* provide the flags to MI code.
|
|
*/
|
|
|
|
#define bus_space_barrier(t, h, o, l, f) \
|
|
((void)((void)(t), (void)(h), (void)(o), (void)(l), (void)(f)))
|
|
#define BUS_SPACE_BARRIER_READ 0x01 /* force read barrier */
|
|
#define BUS_SPACE_BARRIER_WRITE 0x02 /* force write barrier */
|
|
|
|
#define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t)
|
|
|
|
/*
|
|
* Bus DMA methods.
|
|
*/
|
|
|
|
/*
|
|
* Flags used in various bus DMA methods.
|
|
*/
|
|
#define BUS_DMA_WAITOK 0x00 /* safe to sleep (pseudo-flag) */
|
|
#define BUS_DMA_NOWAIT 0x01 /* not safe to sleep */
|
|
#define BUS_DMA_ALLOCNOW 0x02 /* perform resource allocation now */
|
|
#define BUS_DMA_COHERENT 0x04 /* hint: map memory DMA coherent */
|
|
#define BUS_DMA_BUS1 0x10 /* placeholders for bus functions... */
|
|
#define BUS_DMA_BUS2 0x20
|
|
#define BUS_DMA_BUS3 0x40
|
|
#define BUS_DMA_BUS4 0x80
|
|
|
|
/* 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 macppc_bus_dma_tag *bus_dma_tag_t;
|
|
typedef struct macppc_bus_dmamap *bus_dmamap_t;
|
|
|
|
/*
|
|
* bus_dma_segment_t
|
|
*
|
|
* Describes a single contiguous DMA transaction. Values
|
|
* are suitable for programming into DMA registers.
|
|
*/
|
|
struct macppc_bus_dma_segment {
|
|
bus_addr_t ds_addr; /* DMA address */
|
|
bus_size_t ds_len; /* length of transfer */
|
|
};
|
|
typedef struct macppc_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 macppc_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;
|
|
|
|
/*
|
|
* 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, caddr_t *, int);
|
|
void (*_dmamem_unmap)(bus_dma_tag_t, caddr_t, size_t);
|
|
vm_offset_t (*_dmamem_mmap)(bus_dma_tag_t, bus_dma_segment_t *,
|
|
int, off_t, int, int);
|
|
};
|
|
|
|
#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))
|
|
#define bus_dmamap_sync(t, p, o, l, ops) \
|
|
(void)((t)->_dmamap_sync ? \
|
|
(*(t)->_dmamap_sync)((t), (p), (o), (l), (ops)) : (void)0)
|
|
|
|
#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 macppc_bus_dmamap {
|
|
/*
|
|
* PRIVATE MEMBERS: not for use my 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_maxsegsz; /* 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_mapsize; /* size of the mapping */
|
|
int dm_nsegs; /* # valid segments in mapping */
|
|
bus_dma_segment_t dm_segs[1]; /* segments; variable length */
|
|
};
|
|
|
|
#ifdef _MACPPC_BUS_DMA_PRIVATE
|
|
int _bus_dmamap_create(bus_dma_tag_t, bus_size_t, int, bus_size_t,
|
|
bus_size_t, int, bus_dmamap_t *);
|
|
void _bus_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t);
|
|
int _bus_dmamap_load(bus_dma_tag_t, bus_dmamap_t, void *,
|
|
bus_size_t, struct proc *, int);
|
|
int _bus_dmamap_load_mbuf(bus_dma_tag_t, bus_dmamap_t, struct mbuf *, int);
|
|
int _bus_dmamap_load_uio(bus_dma_tag_t, bus_dmamap_t, struct uio *, int);
|
|
int _bus_dmamap_load_raw(bus_dma_tag_t, bus_dmamap_t,
|
|
bus_dma_segment_t *, int, bus_size_t, int);
|
|
void _bus_dmamap_unload(bus_dma_tag_t, bus_dmamap_t);
|
|
void _bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
|
|
bus_size_t, int);
|
|
|
|
int _bus_dmamem_alloc(bus_dma_tag_t tag, bus_size_t size,
|
|
bus_size_t alignment, bus_size_t boundary,
|
|
bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags);
|
|
void _bus_dmamem_free(bus_dma_tag_t tag, bus_dma_segment_t *segs, int nsegs);
|
|
int _bus_dmamem_map(bus_dma_tag_t tag, bus_dma_segment_t *segs,
|
|
int nsegs, size_t size, caddr_t *kvap, int flags);
|
|
void _bus_dmamem_unmap(bus_dma_tag_t tag, caddr_t kva,
|
|
size_t size);
|
|
vm_offset_t _bus_dmamem_mmap(bus_dma_tag_t tag,
|
|
bus_dma_segment_t *segs,
|
|
int nsegs, off_t off, int prot, int flags);
|
|
|
|
int _bus_dmamem_alloc_range(bus_dma_tag_t tag, bus_size_t size,
|
|
bus_size_t alignment, bus_size_t boundary,
|
|
bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags,
|
|
vm_offset_t low, vm_offset_t high);
|
|
|
|
#endif /* _MACPPC_BUS_DMA_PRIVATE */
|
|
|
|
#endif /* _MACPPC_BUS_H_ */
|