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228 lines
8.2 KiB
C
228 lines
8.2 KiB
C
/**
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* @file
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*
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* @ingroup rtems_bsd_machine
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*
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* @brief TODO.
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*
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* File origin from FreeBSD 'sys/amd64/include/bus.h'.
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*/
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/*-
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* Copyright (c) 2009, 2010 embedded brains GmbH. All rights reserved.
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*
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* embedded brains GmbH
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* Obere Lagerstr. 30
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* 82178 Puchheim
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* Germany
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* <rtems@embedded-brains.de>
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*
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* Copyright (c) KATO Takenori, 1999.
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*
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* All rights reserved. Unpublished rights reserved under the copyright
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* laws of Japan.
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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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*
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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 as
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* the first lines of this file unmodified.
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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. 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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/*-
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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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#ifndef _RTEMS_BSD_MACHINE_BUS_H_
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#define _RTEMS_BSD_MACHINE_BUS_H_
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#ifndef _RTEMS_BSD_MACHINE_RTEMS_BSD_KERNEL_SPACE_H_
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#error "the header file <machine/rtems-bsd-kernel-space.h> must be included first"
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#endif
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/*
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* Bus address alignment.
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*/
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#define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t)
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/*
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* Bus address maxima.
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*/
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#define BUS_SPACE_MAXADDR_24BIT 0xffffffU
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#define BUS_SPACE_MAXADDR_32BIT 0xffffffffU
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#define BUS_SPACE_MAXADDR 0xffffffffU
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#define BUS_SPACE_MAXSIZE_24BIT 0xffffffU
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#define BUS_SPACE_MAXSIZE_32BIT 0xffffffffU
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#define BUS_SPACE_MAXSIZE 0xffffffffU
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/*
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* Bus access.
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*/
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#define BUS_SPACE_UNRESTRICTED (~0U)
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/*
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* Bus read/write barrier method.
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*/
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#define BUS_SPACE_BARRIER_READ 0x01 /* force read barrier */
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#define BUS_SPACE_BARRIER_WRITE 0x02 /* force write barrier */
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/*
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* Bus address and size types
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*/
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typedef unsigned int bus_addr_t;
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typedef unsigned int bus_size_t;
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/*
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* Access methods for bus resources and address space.
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*/
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typedef int bus_space_tag_t;
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typedef unsigned 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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static __inline int
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bus_space_map(bus_space_tag_t t __unused, bus_addr_t addr,
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bus_size_t size __unused, int flags __unused,
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bus_space_handle_t *bshp)
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{
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*bshp = addr;
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return (0);
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}
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/*
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* Unmap a region of device bus space.
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*/
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static __inline void
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bus_space_unmap(bus_space_tag_t bst __unused, bus_space_handle_t bsh __unused,
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bus_size_t size __unused)
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{
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/* Do nothing */
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}
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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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static __inline int
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bus_space_subregion(bus_space_tag_t bst __unused, bus_space_handle_t bsh,
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bus_size_t ofs, bus_size_t size, bus_space_handle_t *nbshp)
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{
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*nbshp = bsh + ofs;
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return (0);
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}
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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
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bus_space_alloc(bus_space_tag_t bst __unused, bus_addr_t rstart, bus_addr_t rend,
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bus_size_t size, bus_size_t align, bus_size_t boundary, int flags,
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bus_addr_t *addrp, 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
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bus_space_free(bus_space_tag_t bst __unused, bus_space_handle_t bsh, bus_size_t size);
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#if defined(__i386__)
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#include <machine/bus_space-i386.h>
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#elif defined(__ppc__) || defined(__arm__)
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#include <machine/bus_space-simple_memory.h>
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#else
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#warning "Bus space routines not implemented for this architecture!!"
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#warning "Defaulting to simple-memory Bus space routines!!"
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#include <machine/bus_space-simple_memory.h>
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#endif
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#include <machine/bus_dma.h>
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#endif /* _RTEMS_BSD_MACHINE_BUS_H_ */
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