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dfe41fc832
Historically, the documentation of extended asm was lacking, namely you should NOT specify the same register as an input, and a clobber. If the register is clobbered, it should be specified as an output as well, e.g., by linking input and output through the "number" notation. (Beware of lvalues, some local variables needed...) URL:http://egcs.cygnus.com/faq.html In versions up to egcs-1.1.1, the compiler did not even warn about it, but it was liable to output bad code. Newer egcs are pickier and simply refuse to swallow such code. Note, since *addr changes, it needs to be an output operand. We might be excessive in saying that all memory has changed. Obtained from: OpenBSD w/extra thanks to Marc Espie <Marc.Espie@liafa.jussieu.fr>
1292 lines
35 KiB
C
1292 lines
35 KiB
C
/* $NetBSD: bus.h,v 1.12 1997/10/01 08:25:15 fvdl Exp $ */
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/*-
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* Copyright (c) 1996, 1997 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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/* $FreeBSD$ */
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#ifndef _I386_BUS_H_
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#define _I386_BUS_H_
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#include <machine/cpufunc.h>
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/*
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* To remain compatible with NetBSD's interface, default to both memio and
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* pio when neither of them is defined.
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*/
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#if !defined(_I386_BUS_PIO_H_) && !defined(_I386_BUS_MEMIO_H_)
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#define _I386_BUS_PIO_H_
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#define _I386_BUS_MEMIO_H_
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#endif
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/*
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* Values for the i386 bus space tag, not to be used directly by MI code.
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*/
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#define I386_BUS_SPACE_IO 0 /* space is i/o space */
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#define I386_BUS_SPACE_MEM 1 /* space is mem space */
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/*
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* Bus address and size types
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*/
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typedef u_int bus_addr_t;
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typedef u_int bus_size_t;
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#define BUS_SPACE_MAXSIZE_24BIT 0xFFFFFF
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#define BUS_SPACE_MAXSIZE_32BIT 0xFFFFFFFF
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#define BUS_SPACE_MAXSIZE (64 * 1024) /* Maximum supported size */
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#define BUS_SPACE_MAXADDR_24BIT 0xFFFFFF
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#define BUS_SPACE_MAXADDR_32BIT 0xFFFFFFFF
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#define BUS_SPACE_MAXADDR 0xFFFFFFFF
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#define BUS_SPACE_UNRESTRICTED (~0)
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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_int bus_space_handle_t;
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/*
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* Map a region of device bus space into CPU virtual address 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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int bus_space_map(bus_space_tag_t t, bus_addr_t addr, bus_size_t size,
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int flags, bus_space_handle_t *bshp);
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/*
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* Unmap a region of device bus space.
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*/
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void bus_space_unmap(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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* 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,
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bus_space_handle_t *nbshp);
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/*
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* Allocate a region of memory that is accessible to devices in 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 flags, bus_addr_t *addrp,
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bus_space_handle_t *bshp);
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/*
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* Free a region of bus space accessible memory.
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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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#if defined(_I386_BUS_PIO_H_) || defined(_I386_BUS_MEMIO_H_)
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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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static __inline u_int8_t bus_space_read_1(bus_space_tag_t tag,
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bus_space_handle_t handle,
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bus_size_t offset);
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static __inline u_int16_t bus_space_read_2(bus_space_tag_t tag,
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bus_space_handle_t handle,
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bus_size_t offset);
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static __inline u_int32_t bus_space_read_4(bus_space_tag_t tag,
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bus_space_handle_t handle,
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bus_size_t offset);
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static __inline u_int8_t
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bus_space_read_1(bus_space_tag_t tag, bus_space_handle_t handle,
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bus_size_t offset)
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{
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#if defined (_I386_BUS_PIO_H_)
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#if defined (_I386_BUS_MEMIO_H_)
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if (tag == I386_BUS_SPACE_IO)
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#endif
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return (inb(handle + offset));
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#endif
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#if defined (_I386_BUS_MEMIO_H_)
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return (*(volatile u_int8_t *)(handle + offset));
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#endif
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}
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static __inline u_int16_t
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bus_space_read_2(bus_space_tag_t tag, bus_space_handle_t handle,
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bus_size_t offset)
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{
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#if defined(_I386_BUS_PIO_H_)
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#if defined(_I386_BUS_MEMIO_H_)
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if (tag == I386_BUS_SPACE_IO)
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#endif
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return (inw(handle + offset));
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#endif
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#if defined(_I386_BUS_MEMIO_H_)
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return (*(volatile u_int16_t *)(handle + offset));
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#endif
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}
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static __inline u_int32_t
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bus_space_read_4(bus_space_tag_t tag, bus_space_handle_t handle,
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bus_size_t offset)
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{
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#if defined(_I386_BUS_PIO_H_)
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#if defined(_I386_BUS_MEMIO_H_)
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if (tag == I386_BUS_SPACE_IO)
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#endif
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return (inl(handle + offset));
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#endif
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#if defined(_I386_BUS_MEMIO_H_)
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return (*(volatile u_int32_t *)(handle + offset));
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#endif
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}
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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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* 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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static __inline void bus_space_read_multi_1(bus_space_tag_t tag,
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bus_space_handle_t bsh,
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bus_size_t offset, u_int8_t *addr,
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size_t count);
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static __inline void bus_space_read_multi_2(bus_space_tag_t tag,
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bus_space_handle_t bsh,
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bus_size_t offset, u_int16_t *addr,
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size_t count);
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static __inline void bus_space_read_multi_4(bus_space_tag_t tag,
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bus_space_handle_t bsh,
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bus_size_t offset, u_int32_t *addr,
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size_t count);
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static __inline void
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bus_space_read_multi_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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#if defined(_I386_BUS_PIO_H_)
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#if defined(_I386_BUS_MEMIO_H_)
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if (tag == I386_BUS_SPACE_IO)
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#endif
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insb(bsh + offset, addr, count);
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#endif
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#if defined(_I386_BUS_MEMIO_H_)
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#if defined(_I386_BUS_PIO_H_)
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else
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#endif
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{
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__asm __volatile(" \n\
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cld \n\
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1: movb (%2),%%al \n\
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stosb \n\
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loop 1b" :
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"=D" (addr), "=c" (count) :
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"r" (bsh + offset), "0" (addr), "1" (count) :
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"%eax", "memory");
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}
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#endif
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}
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static __inline void
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bus_space_read_multi_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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#if defined(_I386_BUS_PIO_H_)
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#if defined(_I386_BUS_MEMIO_H_)
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if (tag == I386_BUS_SPACE_IO)
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#endif
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insw(bsh + offset, addr, count);
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#endif
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#if defined(_I386_BUS_MEMIO_H_)
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#if defined(_I386_BUS_PIO_H_)
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else
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#endif
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{
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__asm __volatile(" \n\
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cld \n\
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1: movw (%2),%%ax \n\
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stosw \n\
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loop 1b" :
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"=D" (addr), "=c" (count) :
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"r" (bsh + offset), "0" (addr), "1" (count) :
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"%eax", "memory");
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}
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#endif
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}
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static __inline void
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bus_space_read_multi_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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#if defined(_I386_BUS_PIO_H_)
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#if defined(_I386_BUS_MEMIO_H_)
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if (tag == I386_BUS_SPACE_IO)
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#endif
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insl(bsh + offset, addr, count);
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#endif
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#if defined(_I386_BUS_MEMIO_H_)
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#if defined(_I386_BUS_PIO_H_)
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else
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#endif
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{
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__asm __volatile(" \n\
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cld \n\
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1: movl (%2),%%eax \n\
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stosl \n\
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loop 1b" :
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"=D" (addr), "=c" (count) :
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"r" (bsh + offset), "0" (addr), "1" (count) :
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"%eax", "memory");
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}
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#endif
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}
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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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/*
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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 bus_space_read_region_1(bus_space_tag_t tag,
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bus_space_handle_t bsh,
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bus_size_t offset, u_int8_t *addr,
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size_t count);
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static __inline void bus_space_read_region_2(bus_space_tag_t tag,
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bus_space_handle_t bsh,
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bus_size_t offset, u_int16_t *addr,
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size_t count);
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static __inline void bus_space_read_region_4(bus_space_tag_t tag,
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bus_space_handle_t bsh,
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bus_size_t offset, u_int32_t *addr,
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size_t count);
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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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#if defined(_I386_BUS_PIO_H_)
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#if defined(_I386_BUS_MEMIO_H_)
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if (tag == I386_BUS_SPACE_IO)
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#endif
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{
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int _port_ = bsh + offset; \
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__asm __volatile(" \n\
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cld \n\
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1: inb %w2,%%al \n\
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stosb \n\
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incl %2 \n\
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loop 1b" :
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"=D" (addr), "=c" (count), "=d" (_port_) :
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"0" (addr), "1" (count), "2" (_port_) :
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"%eax", "memory", "cc");
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}
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#endif
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#if defined(_I386_BUS_MEMIO_H_)
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#if defined(_I386_BUS_PIO_H_)
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else
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#endif
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{
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int _port_ = bsh + offset; \
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__asm __volatile(" \n\
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cld \n\
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repne \n\
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movsb" :
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"=D" (addr), "=c" (count), "=S" (_port_) :
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"0" (addr), "1" (count), "2" (_port_) :
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"memory", "cc");
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}
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#endif
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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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#if defined(_I386_BUS_PIO_H_)
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#if defined(_I386_BUS_MEMIO_H_)
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if (tag == I386_BUS_SPACE_IO)
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#endif
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{
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int _port_ = bsh + offset; \
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__asm __volatile(" \n\
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cld \n\
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1: inw %w2,%%ax \n\
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stosw \n\
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addl $2,%2 \n\
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loop 1b" :
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"=D" (addr), "=c" (count), "=d" (_port_) :
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"0" (addr), "1" (count), "2" (_port_) :
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"%eax", "memory", "cc");
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}
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#endif
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#if defined(_I386_BUS_MEMIO_H_)
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#if defined(_I386_BUS_PIO_H_)
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else
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#endif
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{
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int _port_ = bsh + offset; \
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__asm __volatile(" \n\
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cld \n\
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repne \n\
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movsw" :
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"=D" (addr), "=c" (count), "=S" (_port_) :
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"0" (addr), "1" (count), "2" (_port_) :
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"memory", "cc");
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}
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#endif
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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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#if defined(_I386_BUS_PIO_H_)
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#if defined(_I386_BUS_MEMIO_H_)
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if (tag == I386_BUS_SPACE_IO)
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#endif
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{
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int _port_ = bsh + offset; \
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__asm __volatile(" \n\
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cld \n\
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1: inl %w2,%%eax \n\
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stosl \n\
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addl $4,%2 \n\
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loop 1b" :
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"=D" (addr), "=c" (count), "=d" (_port_) :
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"0" (addr), "1" (count), "2" (_port_) :
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"%eax", "memory", "cc");
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}
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#endif
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#if defined(_I386_BUS_MEMIO_H_)
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#if defined(_I386_BUS_PIO_H_)
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else
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#endif
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{
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int _port_ = bsh + offset; \
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__asm __volatile(" \n\
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cld \n\
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repne \n\
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movsl" :
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"=D" (addr), "=c" (count), "=S" (_port_) :
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"0" (addr), "1" (count), "2" (_port_) :
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"memory", "cc");
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}
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#endif
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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 !!! bus_space_read_region_8 unimplemented !!!
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|
#endif
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/*
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|
* Write the 1, 2, 4, or 8 byte value `value' to bus space
|
|
* described by tag/handle/offset.
|
|
*/
|
|
|
|
static __inline void bus_space_write_1(bus_space_tag_t tag,
|
|
bus_space_handle_t bsh,
|
|
bus_size_t offset, u_int8_t value);
|
|
|
|
static __inline void bus_space_write_2(bus_space_tag_t tag,
|
|
bus_space_handle_t bsh,
|
|
bus_size_t offset, u_int16_t value);
|
|
|
|
static __inline void bus_space_write_4(bus_space_tag_t tag,
|
|
bus_space_handle_t bsh,
|
|
bus_size_t offset, u_int32_t value);
|
|
|
|
static __inline void
|
|
bus_space_write_1(bus_space_tag_t tag, bus_space_handle_t bsh,
|
|
bus_size_t offset, u_int8_t value)
|
|
{
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
if (tag == I386_BUS_SPACE_IO)
|
|
#endif
|
|
outb(bsh + offset, value);
|
|
#endif
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
else
|
|
#endif
|
|
*(volatile u_int8_t *)(bsh + offset) = value;
|
|
#endif
|
|
}
|
|
|
|
static __inline void
|
|
bus_space_write_2(bus_space_tag_t tag, bus_space_handle_t bsh,
|
|
bus_size_t offset, u_int16_t value)
|
|
{
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
if (tag == I386_BUS_SPACE_IO)
|
|
#endif
|
|
outw(bsh + offset, value);
|
|
#endif
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
else
|
|
#endif
|
|
*(volatile u_int16_t *)(bsh + offset) = value;
|
|
#endif
|
|
}
|
|
|
|
static __inline void
|
|
bus_space_write_4(bus_space_tag_t tag, bus_space_handle_t bsh,
|
|
bus_size_t offset, u_int32_t value)
|
|
{
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
if (tag == I386_BUS_SPACE_IO)
|
|
#endif
|
|
outl(bsh + offset, value);
|
|
#endif
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
else
|
|
#endif
|
|
*(volatile u_int32_t *)(bsh + offset) = value;
|
|
#endif
|
|
}
|
|
|
|
#if 0 /* Cause a link error for bus_space_write_8 */
|
|
#define bus_space_write_8 !!! bus_space_write_8 not implemented !!!
|
|
#endif
|
|
|
|
/*
|
|
* Write `count' 1, 2, 4, or 8 byte quantities from the buffer
|
|
* provided to bus space described by tag/handle/offset.
|
|
*/
|
|
|
|
static __inline void bus_space_write_multi_1(bus_space_tag_t tag,
|
|
bus_space_handle_t bsh,
|
|
bus_size_t offset,
|
|
const u_int8_t *addr,
|
|
size_t count);
|
|
static __inline void bus_space_write_multi_2(bus_space_tag_t tag,
|
|
bus_space_handle_t bsh,
|
|
bus_size_t offset,
|
|
const u_int16_t *addr,
|
|
size_t count);
|
|
|
|
static __inline void bus_space_write_multi_4(bus_space_tag_t tag,
|
|
bus_space_handle_t bsh,
|
|
bus_size_t offset,
|
|
const u_int32_t *addr,
|
|
size_t count);
|
|
|
|
static __inline void
|
|
bus_space_write_multi_1(bus_space_tag_t tag, bus_space_handle_t bsh,
|
|
bus_size_t offset, const u_int8_t *addr, size_t count)
|
|
{
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
if (tag == I386_BUS_SPACE_IO)
|
|
#endif
|
|
outsb(bsh + offset, addr, count);
|
|
#endif
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
else
|
|
#endif
|
|
{
|
|
__asm __volatile(" \n\
|
|
cld \n\
|
|
1: lodsb \n\
|
|
movb %%al,(%2) \n\
|
|
loop 1b" :
|
|
"=S" (addr), "=c" (count) :
|
|
"r" (bsh + offset), "0" (addr), "1" (count) :
|
|
"%eax", "memory", "cc");
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static __inline void
|
|
bus_space_write_multi_2(bus_space_tag_t tag, bus_space_handle_t bsh,
|
|
bus_size_t offset, const u_int16_t *addr, size_t count)
|
|
{
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
if (tag == I386_BUS_SPACE_IO)
|
|
#endif
|
|
outsw(bsh + offset, addr, count);
|
|
#endif
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
else
|
|
#endif
|
|
{
|
|
__asm __volatile(" \n\
|
|
cld \n\
|
|
1: lodsw \n\
|
|
movw %%ax,(%1) \n\
|
|
movw %%ax,(%2) \n\
|
|
loop 1b" :
|
|
"=S" (addr), "=c" (count) :
|
|
"r" (bsh + offset), "0" (addr), "1" (count) :
|
|
"%eax", "memory", "cc");
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static __inline void
|
|
bus_space_write_multi_4(bus_space_tag_t tag, bus_space_handle_t bsh,
|
|
bus_size_t offset, const u_int32_t *addr, size_t count)
|
|
{
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
if (tag == I386_BUS_SPACE_IO)
|
|
#endif
|
|
outsl(bsh + offset, addr, count);
|
|
#endif
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
else
|
|
#endif
|
|
{
|
|
__asm __volatile(" \n\
|
|
cld \n\
|
|
1: lodsl \n\
|
|
movl %%eax,(%2) \n\
|
|
loop 1b" :
|
|
"=S" (addr), "=c" (count) :
|
|
"r" (bsh + offset), "0" (addr), "1" (count) :
|
|
"%eax", "memory", "cc");
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#if 0 /* Cause a link error for bus_space_write_multi_8 */
|
|
#define bus_space_write_multi_8(t, h, o, a, c) \
|
|
!!! bus_space_write_multi_8 unimplemented !!!
|
|
#endif
|
|
|
|
/*
|
|
* Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided
|
|
* to bus space described by tag/handle starting at `offset'.
|
|
*/
|
|
|
|
static __inline void bus_space_write_region_1(bus_space_tag_t tag,
|
|
bus_space_handle_t bsh,
|
|
bus_size_t offset,
|
|
const u_int8_t *addr,
|
|
size_t count);
|
|
static __inline void bus_space_write_region_2(bus_space_tag_t tag,
|
|
bus_space_handle_t bsh,
|
|
bus_size_t offset,
|
|
const u_int16_t *addr,
|
|
size_t count);
|
|
static __inline void bus_space_write_region_4(bus_space_tag_t tag,
|
|
bus_space_handle_t bsh,
|
|
bus_size_t offset,
|
|
const u_int32_t *addr,
|
|
size_t count);
|
|
|
|
static __inline void
|
|
bus_space_write_region_1(bus_space_tag_t tag, bus_space_handle_t bsh,
|
|
bus_size_t offset, const u_int8_t *addr, size_t count)
|
|
{
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
if (tag == I386_BUS_SPACE_IO)
|
|
#endif
|
|
{
|
|
int _port_ = bsh + offset; \
|
|
__asm __volatile(" \n\
|
|
cld \n\
|
|
1: lodsb \n\
|
|
outb %%al,%w0 \n\
|
|
incl %0 \n\
|
|
loop 1b" :
|
|
"=d" (_port_), "=S" (addr), "=c" (count) :
|
|
"0" (_port_), "1" (addr), "2" (count) :
|
|
"%eax", "memory", "cc");
|
|
}
|
|
#endif
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
else
|
|
#endif
|
|
{
|
|
int _port_ = bsh + offset; \
|
|
__asm __volatile(" \n\
|
|
cld \n\
|
|
repne \n\
|
|
movsb" :
|
|
"=D" (_port_), "=S" (addr), "=c" (count) :
|
|
"0" (_port_), "1" (addr), "2" (count) :
|
|
"memory", "cc");
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static __inline void
|
|
bus_space_write_region_2(bus_space_tag_t tag, bus_space_handle_t bsh,
|
|
bus_size_t offset, const u_int16_t *addr, size_t count)
|
|
{
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
if (tag == I386_BUS_SPACE_IO)
|
|
#endif
|
|
{
|
|
int _port_ = bsh + offset; \
|
|
__asm __volatile(" \n\
|
|
cld \n\
|
|
1: lodsw \n\
|
|
outw %%ax,%w0 \n\
|
|
addl $2,%0 \n\
|
|
loop 1b" :
|
|
"=d" (_port_), "=S" (addr), "=c" (count) :
|
|
"0" (_port_), "1" (addr), "2" (count) :
|
|
"%eax", "memory", "cc");
|
|
}
|
|
#endif
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
else
|
|
#endif
|
|
{
|
|
int _port_ = bsh + offset; \
|
|
__asm __volatile(" \n\
|
|
cld \n\
|
|
repne \n\
|
|
movsw" :
|
|
"=D" (_port_), "=S" (addr), "=c" (count) :
|
|
"0" (_port_), "1" (addr), "2" (count) :
|
|
"memory", "cc");
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static __inline void
|
|
bus_space_write_region_4(bus_space_tag_t tag, bus_space_handle_t bsh,
|
|
bus_size_t offset, const u_int32_t *addr, size_t count)
|
|
{
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
if (tag == I386_BUS_SPACE_IO)
|
|
#endif
|
|
{
|
|
int _port_ = bsh + offset; \
|
|
__asm __volatile(" \n\
|
|
cld \n\
|
|
1: lodsl \n\
|
|
outl %%eax,%w0 \n\
|
|
addl $4,%0 \n\
|
|
loop 1b" :
|
|
"=d" (_port_), "=S" (addr), "=c" (count) :
|
|
"0" (_port_), "1" (addr), "2" (count) :
|
|
"%eax", "memory", "cc");
|
|
}
|
|
#endif
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
else
|
|
#endif
|
|
{
|
|
int _port_ = bsh + offset; \
|
|
__asm __volatile(" \n\
|
|
cld \n\
|
|
repne \n\
|
|
movsl" :
|
|
"=D" (_port_), "=S" (addr), "=c" (count) :
|
|
"0" (_port_), "1" (addr), "2" (count) :
|
|
"memory", "cc");
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#if 0 /* Cause a link error for bus_space_write_region_8 */
|
|
#define bus_space_write_region_8 \
|
|
!!! bus_space_write_region_8 unimplemented !!!
|
|
#endif
|
|
|
|
/*
|
|
* Write the 1, 2, 4, or 8 byte value `val' to bus space described
|
|
* by tag/handle/offset `count' times.
|
|
*/
|
|
|
|
static __inline void bus_space_set_multi_1(bus_space_tag_t tag,
|
|
bus_space_handle_t bsh,
|
|
bus_size_t offset,
|
|
u_int8_t value, size_t count);
|
|
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 value, size_t count);
|
|
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 value, size_t count);
|
|
|
|
static __inline void
|
|
bus_space_set_multi_1(bus_space_tag_t tag, bus_space_handle_t bsh,
|
|
bus_size_t offset, u_int8_t value, size_t count)
|
|
{
|
|
bus_addr_t addr = bsh + offset;
|
|
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
if (tag == I386_BUS_SPACE_IO)
|
|
#endif
|
|
while (count--)
|
|
outb(addr, value);
|
|
#endif
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
else
|
|
#endif
|
|
while (count--)
|
|
*(volatile u_int8_t *)(addr) = value;
|
|
#endif
|
|
}
|
|
|
|
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 value, size_t count)
|
|
{
|
|
bus_addr_t addr = bsh + offset;
|
|
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
if (tag == I386_BUS_SPACE_IO)
|
|
#endif
|
|
while (count--)
|
|
outw(addr, value);
|
|
#endif
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
else
|
|
#endif
|
|
while (count--)
|
|
*(volatile u_int16_t *)(addr) = value;
|
|
#endif
|
|
}
|
|
|
|
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 value, size_t count)
|
|
{
|
|
bus_addr_t addr = bsh + offset;
|
|
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
if (tag == I386_BUS_SPACE_IO)
|
|
#endif
|
|
while (count--)
|
|
outl(addr, value);
|
|
#endif
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
else
|
|
#endif
|
|
while (count--)
|
|
*(volatile u_int32_t *)(addr) = value;
|
|
#endif
|
|
}
|
|
|
|
#if 0 /* Cause a link error for bus_space_set_multi_8 */
|
|
#define bus_space_set_multi_8 !!! bus_space_set_multi_8 unimplemented !!!
|
|
#endif
|
|
|
|
/*
|
|
* 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 value,
|
|
size_t count);
|
|
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 value,
|
|
size_t count);
|
|
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 value,
|
|
size_t count);
|
|
|
|
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 value, size_t count)
|
|
{
|
|
bus_addr_t addr = bsh + offset;
|
|
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
if (tag == I386_BUS_SPACE_IO)
|
|
#endif
|
|
for (; count != 0; count--, addr++)
|
|
outb(addr, value);
|
|
#endif
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
else
|
|
#endif
|
|
for (; count != 0; count--, addr++)
|
|
*(volatile u_int8_t *)(addr) = value;
|
|
#endif
|
|
}
|
|
|
|
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 value, size_t count)
|
|
{
|
|
bus_addr_t addr = bsh + offset;
|
|
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
if (tag == I386_BUS_SPACE_IO)
|
|
#endif
|
|
for (; count != 0; count--, addr += 2)
|
|
outw(addr, value);
|
|
#endif
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
else
|
|
#endif
|
|
for (; count != 0; count--, addr += 2)
|
|
*(volatile u_int16_t *)(addr) = value;
|
|
#endif
|
|
}
|
|
|
|
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 value, size_t count)
|
|
{
|
|
bus_addr_t addr = bsh + offset;
|
|
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
if (tag == I386_BUS_SPACE_IO)
|
|
#endif
|
|
for (; count != 0; count--, addr += 4)
|
|
outl(addr, value);
|
|
#endif
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
else
|
|
#endif
|
|
for (; count != 0; count--, addr += 4)
|
|
*(volatile u_int32_t *)(addr) = value;
|
|
#endif
|
|
}
|
|
|
|
#if 0 /* Cause a link error for bus_space_set_region_8 */
|
|
#define bus_space_set_region_8 !!! bus_space_set_region_8 unimplemented !!!
|
|
#endif
|
|
|
|
/*
|
|
* Copy `count' 1, 2, 4, or 8 byte values from bus space starting
|
|
* at tag/bsh1/off1 to bus space starting at tag/bsh2/off2.
|
|
*/
|
|
|
|
static __inline void bus_space_copy_region_1(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);
|
|
|
|
static __inline void bus_space_copy_region_2(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);
|
|
|
|
static __inline void bus_space_copy_region_4(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);
|
|
|
|
static __inline void
|
|
bus_space_copy_region_1(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)
|
|
{
|
|
bus_addr_t addr1 = bsh1 + off1;
|
|
bus_addr_t addr2 = bsh2 + off2;
|
|
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
if (tag == I386_BUS_SPACE_IO)
|
|
#endif
|
|
{
|
|
if (addr1 >= addr2) {
|
|
/* src after dest: copy forward */
|
|
for (; count != 0; count--, addr1++, addr2++)
|
|
outb(addr2, inb(addr1));
|
|
} else {
|
|
/* dest after src: copy backwards */
|
|
for (addr1 += (count - 1), addr2 += (count - 1);
|
|
count != 0; count--, addr1--, addr2--)
|
|
outb(addr2, inb(addr1));
|
|
}
|
|
}
|
|
#endif
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
else
|
|
#endif
|
|
{
|
|
if (addr1 >= addr2) {
|
|
/* src after dest: copy forward */
|
|
for (; count != 0; count--, addr1++, addr2++)
|
|
*(volatile u_int8_t *)(addr2) =
|
|
*(volatile u_int8_t *)(addr1);
|
|
} else {
|
|
/* dest after src: copy backwards */
|
|
for (addr1 += (count - 1), addr2 += (count - 1);
|
|
count != 0; count--, addr1--, addr2--)
|
|
*(volatile u_int8_t *)(addr2) =
|
|
*(volatile u_int8_t *)(addr1);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static __inline void
|
|
bus_space_copy_region_2(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)
|
|
{
|
|
bus_addr_t addr1 = bsh1 + off1;
|
|
bus_addr_t addr2 = bsh2 + off2;
|
|
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
if (tag == I386_BUS_SPACE_IO)
|
|
#endif
|
|
{
|
|
if (addr1 >= addr2) {
|
|
/* src after dest: copy forward */
|
|
for (; count != 0; count--, addr1 += 2, addr2 += 2)
|
|
outw(addr2, inw(addr1));
|
|
} else {
|
|
/* dest after src: copy backwards */
|
|
for (addr1 += 2 * (count - 1), addr2 += 2 * (count - 1);
|
|
count != 0; count--, addr1 -= 2, addr2 -= 2)
|
|
outw(addr2, inw(addr1));
|
|
}
|
|
}
|
|
#endif
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
else
|
|
#endif
|
|
{
|
|
if (addr1 >= addr2) {
|
|
/* src after dest: copy forward */
|
|
for (; count != 0; count--, addr1 += 2, addr2 += 2)
|
|
*(volatile u_int16_t *)(addr2) =
|
|
*(volatile u_int16_t *)(addr1);
|
|
} else {
|
|
/* dest after src: copy backwards */
|
|
for (addr1 += 2 * (count - 1), addr2 += 2 * (count - 1);
|
|
count != 0; count--, addr1 -= 2, addr2 -= 2)
|
|
*(volatile u_int16_t *)(addr2) =
|
|
*(volatile u_int16_t *)(addr1);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static __inline void
|
|
bus_space_copy_region_4(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)
|
|
{
|
|
bus_addr_t addr1 = bsh1 + off1;
|
|
bus_addr_t addr2 = bsh2 + off2;
|
|
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
if (tag == I386_BUS_SPACE_IO)
|
|
#endif
|
|
{
|
|
if (addr1 >= addr2) {
|
|
/* src after dest: copy forward */
|
|
for (; count != 0; count--, addr1 += 4, addr2 += 4)
|
|
outl(addr2, inl(addr1));
|
|
} else {
|
|
/* dest after src: copy backwards */
|
|
for (addr1 += 4 * (count - 1), addr2 += 4 * (count - 1);
|
|
count != 0; count--, addr1 -= 4, addr2 -= 4)
|
|
outl(addr2, inl(addr1));
|
|
}
|
|
}
|
|
#endif
|
|
#if defined(_I386_BUS_MEMIO_H_)
|
|
#if defined(_I386_BUS_PIO_H_)
|
|
else
|
|
#endif
|
|
{
|
|
if (addr1 >= addr2) {
|
|
/* src after dest: copy forward */
|
|
for (; count != 0; count--, addr1 += 4, addr2 += 4)
|
|
*(volatile u_int32_t *)(addr2) =
|
|
*(volatile u_int32_t *)(addr1);
|
|
} else {
|
|
/* dest after src: copy backwards */
|
|
for (addr1 += 4 * (count - 1), addr2 += 4 * (count - 1);
|
|
count != 0; count--, addr1 -= 4, addr2 -= 4)
|
|
*(volatile u_int32_t *)(addr2) =
|
|
*(volatile u_int32_t *)(addr1);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#endif /* defined(_I386_BUS_PIO_H_) || defined(_I386_MEM_IO_H_) */
|
|
|
|
#if 0 /* Cause a link error for bus_space_copy_8 */
|
|
#define bus_space_copy_region_8 !!! bus_space_copy_region_8 unimplemented !!!
|
|
#endif
|
|
|
|
/*
|
|
* 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 i386 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 */
|
|
|
|
/*
|
|
* 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_DMAMEM_NOSYNC 0x04 /* map memory to not require sync */
|
|
#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;
|
|
|
|
/*
|
|
* bus_dmasync_op_t
|
|
*
|
|
* Operations performed by bus_dmamap_sync().
|
|
*/
|
|
typedef enum {
|
|
BUS_DMASYNC_PREREAD,
|
|
BUS_DMASYNC_POSTREAD,
|
|
BUS_DMASYNC_PREWRITE,
|
|
BUS_DMASYNC_POSTWRITE
|
|
} bus_dmasync_op_t;
|
|
|
|
/*
|
|
* bus_dma_tag_t
|
|
*
|
|
* A machine-dependent opaque type describing the characteristics
|
|
* of how to perform DMA mappings. This structure encapsultes
|
|
* information concerning address and alignment restrictions, number
|
|
* of S/G segments, amount of data per S/G segment, etc.
|
|
*/
|
|
typedef struct bus_dma_tag *bus_dma_tag_t;
|
|
|
|
/*
|
|
* bus_dmamap_t
|
|
*
|
|
* DMA mapping instance information.
|
|
*/
|
|
typedef struct bus_dmamap *bus_dmamap_t;
|
|
|
|
/*
|
|
* bus_dma_segment_t
|
|
*
|
|
* Describes a single contiguous DMA transaction. Values
|
|
* are suitable for programming into DMA registers.
|
|
*/
|
|
typedef struct bus_dma_segment {
|
|
bus_addr_t ds_addr; /* DMA address */
|
|
bus_size_t ds_len; /* length of transfer */
|
|
} bus_dma_segment_t;
|
|
|
|
/*
|
|
* A function that returns 1 if the address cannot be accessed by
|
|
* a device and 0 if it can be.
|
|
*/
|
|
typedef int bus_dma_filter_t(void *, bus_addr_t);
|
|
|
|
/*
|
|
* Allocate a device specific dma_tag encapsulating the constraints of
|
|
* the parent tag in addition to other restrictions specified:
|
|
*
|
|
* alignment: alignment for segments.
|
|
* boundary: Boundary that segments cannot cross.
|
|
* lowaddr: Low restricted address that cannot appear in a mapping.
|
|
* highaddr: High restricted address that cannot appear in a mapping.
|
|
* filtfunc: An optional function to further test if an address
|
|
* within the range of lowaddr and highaddr cannot appear
|
|
* in a mapping.
|
|
* filtfuncarg: An argument that will be passed to filtfunc in addition
|
|
* to the address to test.
|
|
* maxsize: Maximum mapping size supported by this tag.
|
|
* nsegments: Number of discontinuities allowed in maps.
|
|
* maxsegsz: Maximum size of a segment in the map.
|
|
* flags: Bus DMA flags.
|
|
* dmat: A pointer to set to a valid dma tag should the return
|
|
* value of this function indicate success.
|
|
*/
|
|
/* XXX Should probably allow specification of alignment */
|
|
int bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignemnt,
|
|
bus_size_t boundary, bus_addr_t lowaddr,
|
|
bus_addr_t highaddr, bus_dma_filter_t *filtfunc,
|
|
void *filtfuncarg, bus_size_t maxsize, int nsegments,
|
|
bus_size_t maxsegsz, int flags, bus_dma_tag_t *dmat);
|
|
|
|
int bus_dma_tag_destroy(bus_dma_tag_t dmat);
|
|
|
|
/*
|
|
* Allocate a handle for mapping from kva/uva/physical
|
|
* address space into bus device space.
|
|
*/
|
|
int bus_dmamap_create(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp);
|
|
|
|
/*
|
|
* Destroy a handle for mapping from kva/uva/physical
|
|
* address space into bus device space.
|
|
*/
|
|
int bus_dmamap_destroy(bus_dma_tag_t dmat, bus_dmamap_t map);
|
|
|
|
/*
|
|
* Allocate a piece of memory that can be efficiently mapped into
|
|
* bus device space based on the constraints lited in the dma tag.
|
|
* A dmamap to for use with dmamap_load is also allocated.
|
|
*/
|
|
int bus_dmamem_alloc(bus_dma_tag_t dmat, void** vaddr, int flags,
|
|
bus_dmamap_t *mapp);
|
|
|
|
/*
|
|
* Free a piece of memory and it's allociated dmamap, that was allocated
|
|
* via bus_dmamem_alloc.
|
|
*/
|
|
void bus_dmamem_free(bus_dma_tag_t dmat, void *vaddr, bus_dmamap_t map);
|
|
|
|
/*
|
|
* A function that processes a successfully loaded dma map or an error
|
|
* from a delayed load map.
|
|
*/
|
|
typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int);
|
|
|
|
/*
|
|
* Map the buffer buf into bus space using the dmamap map.
|
|
*/
|
|
int bus_dmamap_load(bus_dma_tag_t dmat, bus_dmamap_t map, void *buf,
|
|
bus_size_t buflen, bus_dmamap_callback_t *callback,
|
|
void *callback_arg, int flags);
|
|
|
|
/*
|
|
* Perform a syncronization operation on the given map.
|
|
*/
|
|
void _bus_dmamap_sync(bus_dma_tag_t, bus_dmamap_t, bus_dmasync_op_t);
|
|
#define bus_dmamap_sync(dmat, dmamap, op) \
|
|
if ((dmamap) != NULL) \
|
|
_bus_dmamap_sync(dmat, dmamap, op)
|
|
|
|
/*
|
|
* Release the mapping held by map.
|
|
*/
|
|
void _bus_dmamap_unload(bus_dma_tag_t dmat, bus_dmamap_t map);
|
|
#define bus_dmamap_unload(dmat, dmamap) \
|
|
if ((dmamap) != NULL) \
|
|
_bus_dmamap_unload(dmat, dmamap)
|
|
|
|
#endif /* _I386_BUS_H_ */
|