964 lines
32 KiB
C
964 lines
32 KiB
C
/* $NetBSD: bus.h,v 1.8 2001/11/14 18:15:28 thorpej Exp $ */
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/*-
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* Copyright (c) 1996, 1997, 1998, 2001 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1997 Per Fogelstrom. All rights reserved.
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* Copyright (c) 1996 Niklas Hallqvist. 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 _MIPSCO_BUS_H_
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#define _MIPSCO_BUS_H_
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#ifdef _KERNEL
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#include <mips/locore.h>
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#ifdef BUS_SPACE_DEBUG
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#include <sys/systm.h> /* for printf() prototype */
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/*
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* Macros for checking the aligned-ness of pointers passed to bus
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* space ops. Strict alignment is required by the MIPS architecture,
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* and a trap will occur if unaligned access is performed. These
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* may aid in the debugging of a broken device driver by displaying
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* useful information about the problem.
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*/
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#define __BUS_SPACE_ALIGNED_ADDRESS(p, t) \
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((((u_long)(p)) & (sizeof(t)-1)) == 0)
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#define __BUS_SPACE_ADDRESS_SANITY(p, t, d) \
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({ \
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if (__BUS_SPACE_ALIGNED_ADDRESS((p), t) == 0) { \
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printf("%s 0x%lx not aligned to %d bytes %s:%d\n", \
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d, (u_long)(p), sizeof(t), __FILE__, __LINE__); \
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} \
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(void) 0; \
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})
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#define BUS_SPACE_ALIGNED_POINTER(p, t) __BUS_SPACE_ALIGNED_ADDRESS(p, t)
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#else
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#define __BUS_SPACE_ADDRESS_SANITY(p,t,d) (void) 0
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#define BUS_SPACE_ALIGNED_POINTER(p, t) ALIGNED_POINTER(p, t)
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#endif /* BUS_SPACE_DEBUG */
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/*
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* Utility macro; do not use outside this file.
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*/
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#ifdef __STDC__
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#define __CONCAT3(a,b,c) a##b##c
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#else
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#define __CONCAT3(a,b,c) a/**/b/**/c
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#endif
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/*
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* Bus address and size types
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*/
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typedef u_long bus_addr_t;
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typedef u_long bus_size_t;
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/*
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* Access methods for bus resources and address space.
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*/
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typedef u_int32_t bus_space_handle_t;
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typedef struct mipsco_bus_space *bus_space_tag_t;
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struct mipsco_bus_space {
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const char *bs_name;
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struct extent *bs_extent;
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bus_addr_t bs_start;
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bus_size_t bs_size;
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paddr_t bs_pbase;
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vaddr_t bs_vbase;
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u_int8_t bs_stride; /* log2(stride) */
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u_int8_t bs_bswap; /* byte swap in stream methods */
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u_int8_t bs_offset_1;
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u_int8_t bs_offset_2;
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u_int8_t bs_offset_4;
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u_int8_t bs_offset_8;
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/* compose a bus_space handle from tag/handle/addr/size/flags (MD) */
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int (*bs_compose_handle) __P((bus_space_tag_t, bus_addr_t,
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bus_size_t, int, bus_space_handle_t *));
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/* dispose a bus_space handle (MD) */
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int (*bs_dispose_handle) __P((bus_space_tag_t, bus_space_handle_t,
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bus_size_t));
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/* convert bus_space tag/handle to physical address (MD) */
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int (*bs_paddr) __P((bus_space_tag_t, bus_space_handle_t,
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paddr_t *));
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/* mapping/unmapping */
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int (*bs_map) __P((bus_space_tag_t, bus_addr_t, bus_size_t, int,
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bus_space_handle_t *));
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void (*bs_unmap) __P((bus_space_tag_t, bus_space_handle_t,
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bus_size_t));
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int (*bs_subregion) __P((bus_space_tag_t, bus_space_handle_t,
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bus_size_t, bus_size_t, bus_space_handle_t *));
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paddr_t (*bs_mmap) __P((bus_space_tag_t, bus_addr_t, off_t, int, int));
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/* allocation/deallocation */
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int (*bs_alloc) __P((bus_space_tag_t, bus_addr_t, bus_addr_t,
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bus_size_t, bus_size_t, bus_size_t, int,
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bus_addr_t *, bus_space_handle_t *));
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void (*bs_free) __P((bus_space_tag_t, bus_space_handle_t,
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bus_size_t));
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/* interrupt attach */
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void (*bs_intr_establish) __P((
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bus_space_tag_t,
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int, /*bus-specific intr*/
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int, /*priority/class*/
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int, /*flags*/
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int (*) __P((void *)), /*handler*/
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void *)); /*handler arg*/
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void *bs_aux;
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};
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/* vaddr_t argument of mipsco_bus_space_init() */
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#define MIPSCO_BUS_SPACE_UNMAPPED ((vaddr_t)0)
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/* machine dependent utility function for bus_space users */
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void mipsco_bus_space_malloc_set_safe __P((void));
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void mipsco_bus_space_init __P((bus_space_tag_t, const char *,
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paddr_t, vaddr_t, bus_addr_t, bus_size_t));
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void mipsco_bus_space_init_extent __P((bus_space_tag_t, caddr_t, size_t));
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void mipsco_bus_space_set_aligned_stride __P((bus_space_tag_t, unsigned int));
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void mipsco_sparse_bus_space_init __P((bus_space_tag_t, const char *,
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paddr_t, bus_addr_t, bus_size_t));
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void mipsco_large_bus_space_init __P((bus_space_tag_t, const char *,
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paddr_t, bus_addr_t, bus_size_t));
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/* machine dependent utility function for bus_space implementations */
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int mipsco_bus_space_extent_malloc_flag __P((void));
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/* these are provided for subclasses which override base bus_space. */
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int mipsco_bus_space_compose_handle __P((bus_space_tag_t,
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bus_addr_t, bus_size_t, int, bus_space_handle_t *));
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int mipsco_bus_space_dispose_handle __P((bus_space_tag_t,
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bus_space_handle_t, bus_size_t));
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int mipsco_bus_space_paddr __P((bus_space_tag_t,
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bus_space_handle_t, paddr_t *));
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int mipsco_sparse_bus_space_compose_handle __P((bus_space_tag_t,
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bus_addr_t, bus_size_t, int, bus_space_handle_t *));
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int mipsco_sparse_bus_space_dispose_handle __P((bus_space_tag_t,
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bus_space_handle_t, bus_size_t));
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int mipsco_sparse_bus_space_paddr __P((bus_space_tag_t,
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bus_space_handle_t, paddr_t *));
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int mipsco_bus_space_map __P((bus_space_tag_t, bus_addr_t, bus_size_t, int,
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bus_space_handle_t *));
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void mipsco_bus_space_unmap __P((bus_space_tag_t, bus_space_handle_t,
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bus_size_t));
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int mipsco_bus_space_subregion __P((bus_space_tag_t, bus_space_handle_t,
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bus_size_t, bus_size_t, bus_space_handle_t *));
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paddr_t mipsco_bus_space_mmap __P((bus_space_tag_t, bus_addr_t, off_t,
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int, int));
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int mipsco_bus_space_alloc __P((bus_space_tag_t, bus_addr_t, bus_addr_t,
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bus_size_t, bus_size_t, bus_size_t, int, bus_addr_t *,
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bus_space_handle_t *));
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#define mipsco_bus_space_free mipsco_bus_space_unmap
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/*
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* int bus_space_compose_handle __P((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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* MACHINE DEPENDENT, NOT PORTABLE INTERFACE:
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* Compose a bus_space handle from tag/handle/addr/size/flags.
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* A helper function for bus_space_map()/bus_space_alloc() implementation.
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*/
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#define bus_space_compose_handle(bst, addr, size, flags, bshp) \
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(*(bst)->bs_compose_handle)(bst, addr, size, flags, bshp)
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/*
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* int bus_space_dispose_handle __P((bus_space_tag_t t, bus_addr_t addr,
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* bus_space_handle_t bsh, bus_size_t size));
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*
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* MACHINE DEPENDENT, NOT PORTABLE INTERFACE:
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* Dispose a bus_space handle.
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* A helper function for bus_space_unmap()/bus_space_free() implementation.
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*/
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#define bus_space_dispose_handle(bst, bsh, size) \
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(*(bst)->bs_dispose_handle)(bst, bsh, size)
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/*
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* int bus_space_paddr __P((bus_space_tag_t tag,
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* bus_space_handle_t bsh, paddr_t *pap));
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*
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* MACHINE DEPENDENT, NOT PORTABLE INTERFACE:
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* (cannot be implemented on e.g. I/O space on i386, non-linear space on alpha)
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* Return physical address of a region.
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* A helper function for device mmap entry.
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*/
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#define bus_space_paddr(bst, bsh, pap) \
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(*(bst)->bs_paddr)(bst, bsh, pap)
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/*
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* void *bus_space_vaddr __P((bus_space_tag_t, bus_space_handle_t));
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*
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* Get the kernel virtual address for the mapped bus space.
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* Only allowed for regions mapped with BUS_SPACE_MAP_LINEAR.
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* (XXX not enforced)
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*/
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#define bus_space_vaddr(bst, bsh) \
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((void *)(bsh))
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/*
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* paddr_t bus_space_mmap __P((bus_space_tag_t, bus_addr_t, off_t,
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* int, int));
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*
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* Mmap bus space on behalf of the user.
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*/
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#define bus_space_mmap(bst, addr, off, prot, flags) \
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(*(bst)->bs_mmap)((bst), (addr), (off), (prot), (flags))
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/*
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* int bus_space_map __P((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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#define bus_space_map(t, a, s, f, hp) \
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(*(t)->bs_map)((t), (a), (s), (f), (hp))
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/*
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* void bus_space_unmap __P((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, h, s) \
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(*(t)->bs_unmap)((t), (h), (s))
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/*
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* int bus_space_subregion __P((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, h, o, s, hp) \
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(*(t)->bs_subregion)((t), (h), (o), (s), (hp))
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/*
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* int bus_space_alloc __P((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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#define bus_space_alloc(t, rs, re, s, a, b, f, ap, hp) \
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(*(t)->bs_alloc)((t), (rs), (re), (s), (a), (b), (f), (ap), (hp))
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/*
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* int bus_space_free __P((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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#define bus_space_free(t, h, s) \
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(*(t)->bs_free)((t), (h), (s))
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/*
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* void bus_intr_establish __P((bus_space_tag_t bst,
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* int level, int pri, int flags, int (*func) __P((void *))
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* void *arg));
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*
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* Attach interrupt handler and softc argument
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*/
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#define bus_intr_establish(t, i, c, f, ihf, iha) \
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(*(t)->bs_intr_establish)((t), (i), (c), (f), (ihf), (iha))
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/*
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* Utility macros; do not use outside this file.
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*/
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#define __BS_TYPENAME(BITS) __CONCAT3(u_int,BITS,_t)
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#define __BS_OFFSET(t, o, BYTES) ((o) << (t)->bs_stride)
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#define __BS_FUNCTION(func,BYTES) __CONCAT3(func,_,BYTES)
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/*
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* Calculate the target address using the bus_space parameters
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*/
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#define __BS_ADDR(t, h, offset, BITS, BYTES) \
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((volatile __CONCAT3(u_int,BITS,_t) *) \
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((h) + __BS_OFFSET(t, offset, BYTES) + \
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(t)->__CONCAT(bs_offset_,BYTES)))
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/*
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* u_intN_t bus_space_read_N __P((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(BYTES,BITS) \
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static __inline __CONCAT3(u_int,BITS,_t) \
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__CONCAT(bus_space_read_,BYTES)(bus_space_tag_t bst, \
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bus_space_handle_t bsh, bus_size_t offset) \
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{ \
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return (*__BS_ADDR(bst, bsh, offset, BITS, BYTES)); \
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}
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__bus_space_read(1,8)
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__bus_space_read(2,16)
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__bus_space_read(4,32)
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__bus_space_read(8,64)
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/*
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* void bus_space_read_multi_N __P((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(BYTES,BITS) \
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static __inline void __BS_FUNCTION(bus_space_read_multi,BYTES) \
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__P((bus_space_tag_t, bus_space_handle_t, bus_size_t, \
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__BS_TYPENAME(BITS) *, size_t)); \
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\
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static __inline void \
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__BS_FUNCTION(bus_space_read_multi,BYTES)(t, h, o, a, c) \
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bus_space_tag_t t; \
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bus_space_handle_t h; \
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bus_size_t o; \
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__BS_TYPENAME(BITS) *a; \
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size_t c; \
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{ \
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\
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while (c--) \
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*a++ = __BS_FUNCTION(bus_space_read,BYTES)(t, h, o); \
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}
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__bus_space_read_multi(1,8)
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__bus_space_read_multi(2,16)
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__bus_space_read_multi(4,32)
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__bus_space_read_multi(8,64)
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/*
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* void bus_space_read_region_N __P((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.
|
|
*/
|
|
|
|
#define __bus_space_read_region(BYTES,BITS) \
|
|
static __inline void __BS_FUNCTION(bus_space_read_region,BYTES) \
|
|
__P((bus_space_tag_t, bus_space_handle_t, bus_size_t, \
|
|
__BS_TYPENAME(BITS) *, size_t)); \
|
|
\
|
|
static __inline void \
|
|
__BS_FUNCTION(bus_space_read_region,BYTES)(t, h, o, a, c) \
|
|
bus_space_tag_t t; \
|
|
bus_space_handle_t h; \
|
|
bus_size_t o; \
|
|
__BS_TYPENAME(BITS) *a; \
|
|
size_t c; \
|
|
{ \
|
|
\
|
|
while (c--) { \
|
|
*a++ = __BS_FUNCTION(bus_space_read,BYTES)(t, h, o); \
|
|
o += BYTES; \
|
|
} \
|
|
}
|
|
|
|
__bus_space_read_region(1,8)
|
|
__bus_space_read_region(2,16)
|
|
__bus_space_read_region(4,32)
|
|
__bus_space_read_region(8,64)
|
|
|
|
|
|
/*
|
|
* void bus_space_write_N __P((bus_space_tag_t tag,
|
|
* bus_space_handle_t bsh, bus_size_t offset,
|
|
* u_intN_t value));
|
|
*
|
|
* Write the 1, 2, 4, or 8 byte value `value' to bus space
|
|
* described by tag/handle/offset.
|
|
*/
|
|
|
|
#define __bus_space_write(BYTES,BITS) \
|
|
static __inline void \
|
|
__CONCAT(bus_space_write_,BYTES)(bus_space_tag_t bst, \
|
|
bus_space_handle_t bsh, \
|
|
bus_size_t offset, __CONCAT3(u_int,BITS,_t) data) \
|
|
{ \
|
|
*__BS_ADDR(bst, bsh, offset, BITS, BYTES) = data; \
|
|
wbflush(); \
|
|
}
|
|
|
|
__bus_space_write(1,8)
|
|
__bus_space_write(2,16)
|
|
__bus_space_write(4,32)
|
|
__bus_space_write(8,64)
|
|
|
|
/*
|
|
* void bus_space_write_multi_N __P((bus_space_tag_t tag,
|
|
* bus_space_handle_t bsh, bus_size_t offset,
|
|
* const u_intN_t *addr, size_t count));
|
|
*
|
|
* Write `count' 1, 2, 4, or 8 byte quantities from the buffer
|
|
* provided to bus space described by tag/handle/offset.
|
|
*/
|
|
|
|
#define __bus_space_write_multi(BYTES,BITS) \
|
|
static __inline void __BS_FUNCTION(bus_space_write_multi,BYTES) \
|
|
__P((bus_space_tag_t, bus_space_handle_t, bus_size_t, \
|
|
__BS_TYPENAME(BITS) *, size_t)); \
|
|
\
|
|
static __inline void \
|
|
__BS_FUNCTION(bus_space_write_multi,BYTES)(t, h, o, a, c) \
|
|
bus_space_tag_t t; \
|
|
bus_space_handle_t h; \
|
|
bus_size_t o; \
|
|
__BS_TYPENAME(BITS) *a; \
|
|
size_t c; \
|
|
{ \
|
|
\
|
|
while (c--) \
|
|
__BS_FUNCTION(bus_space_write,BYTES)(t, h, o, *a++); \
|
|
}
|
|
|
|
__bus_space_write_multi(1,8)
|
|
__bus_space_write_multi(2,16)
|
|
__bus_space_write_multi(4,32)
|
|
__bus_space_write_multi(8,64)
|
|
|
|
|
|
/*
|
|
* void bus_space_write_region_N __P((bus_space_tag_t tag,
|
|
* bus_space_handle_t bsh, bus_size_t offset,
|
|
* const u_intN_t *addr, size_t count));
|
|
*
|
|
* Write `count' 1, 2, 4, or 8 byte quantities from the buffer provided
|
|
* to bus space described by tag/handle starting at `offset'.
|
|
*/
|
|
|
|
#define __bus_space_write_region(BYTES,BITS) \
|
|
static __inline void __BS_FUNCTION(bus_space_write_region,BYTES) \
|
|
__P((bus_space_tag_t, bus_space_handle_t, bus_size_t, \
|
|
const __BS_TYPENAME(BITS) *, size_t)); \
|
|
\
|
|
static __inline void \
|
|
__BS_FUNCTION(bus_space_write_region,BYTES)(t, h, o, a, c) \
|
|
bus_space_tag_t t; \
|
|
bus_space_handle_t h; \
|
|
bus_size_t o; \
|
|
const __BS_TYPENAME(BITS) *a; \
|
|
size_t c; \
|
|
{ \
|
|
\
|
|
while (c--) { \
|
|
__BS_FUNCTION(bus_space_write,BYTES)(t, h, o, *a++); \
|
|
o += BYTES; \
|
|
} \
|
|
}
|
|
|
|
__bus_space_write_region(1,8)
|
|
__bus_space_write_region(2,16)
|
|
__bus_space_write_region(4,32)
|
|
__bus_space_write_region(8,64)
|
|
|
|
|
|
/*
|
|
* void bus_space_set_multi_N __P((bus_space_tag_t tag,
|
|
* bus_space_handle_t bsh, bus_size_t offset, u_intN_t val,
|
|
* size_t count));
|
|
*
|
|
* Write the 1, 2, 4, or 8 byte value `val' to bus space described
|
|
* by tag/handle/offset `count' times.
|
|
*/
|
|
|
|
#define __bus_space_set_multi(BYTES,BITS) \
|
|
static __inline void __BS_FUNCTION(bus_space_set_multi,BYTES) \
|
|
__P((bus_space_tag_t, bus_space_handle_t, bus_size_t, \
|
|
__BS_TYPENAME(BITS), size_t)); \
|
|
\
|
|
static __inline void \
|
|
__BS_FUNCTION(bus_space_set_multi,BYTES)(t, h, o, v, c) \
|
|
bus_space_tag_t t; \
|
|
bus_space_handle_t h; \
|
|
bus_size_t o; \
|
|
__BS_TYPENAME(BITS) v; \
|
|
size_t c; \
|
|
{ \
|
|
\
|
|
while (c--) \
|
|
__BS_FUNCTION(bus_space_write,BYTES)(t, h, o, v); \
|
|
}
|
|
|
|
__bus_space_set_multi(1,8)
|
|
__bus_space_set_multi(2,16)
|
|
__bus_space_set_multi(4,32)
|
|
__bus_space_set_multi(8,64)
|
|
|
|
|
|
/*
|
|
* void bus_space_set_region_N __P((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'.
|
|
*/
|
|
|
|
#define __bus_space_set_region(BYTES,BITS) \
|
|
static __inline void __BS_FUNCTION(bus_space_set_region,BYTES) \
|
|
__P((bus_space_tag_t, bus_space_handle_t, bus_size_t, \
|
|
__BS_TYPENAME(BITS), size_t)); \
|
|
\
|
|
static __inline void \
|
|
__BS_FUNCTION(bus_space_set_region,BYTES)(t, h, o, v, c) \
|
|
bus_space_tag_t t; \
|
|
bus_space_handle_t h; \
|
|
bus_size_t o; \
|
|
__BS_TYPENAME(BITS) v; \
|
|
size_t c; \
|
|
{ \
|
|
\
|
|
while (c--) { \
|
|
__BS_FUNCTION(bus_space_write,BYTES)(t, h, o, v); \
|
|
o += BYTES; \
|
|
} \
|
|
}
|
|
|
|
__bus_space_set_region(1,8)
|
|
__bus_space_set_region(2,16)
|
|
__bus_space_set_region(4,32)
|
|
__bus_space_set_region(8,64)
|
|
|
|
|
|
/*
|
|
* void bus_space_copy_region_N __P((bus_space_tag_t tag,
|
|
* bus_space_handle_t bsh1, bus_size_t off1,
|
|
* bus_space_handle_t bsh2, bus_size_t off2,
|
|
* bus_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.
|
|
*/
|
|
|
|
#define __bus_space_copy_region(BYTES) \
|
|
static __inline void __BS_FUNCTION(bus_space_copy_region,BYTES) \
|
|
__P((bus_space_tag_t, \
|
|
bus_space_handle_t bsh1, bus_size_t off1, \
|
|
bus_space_handle_t bsh2, bus_size_t off2, \
|
|
bus_size_t count)); \
|
|
\
|
|
static __inline void \
|
|
__BS_FUNCTION(bus_space_copy_region,BYTES)(t, h1, o1, h2, o2, c) \
|
|
bus_space_tag_t t; \
|
|
bus_space_handle_t h1, h2; \
|
|
bus_size_t o1, o2, c; \
|
|
{ \
|
|
bus_size_t o; \
|
|
\
|
|
if ((h1 + o1) >= (h2 + o2)) { \
|
|
/* src after dest: copy forward */ \
|
|
for (o = 0; c != 0; c--, o += BYTES) \
|
|
__BS_FUNCTION(bus_space_write,BYTES)(t, h2, o2 + o, \
|
|
__BS_FUNCTION(bus_space_read,BYTES)(t, h1, o1 + o)); \
|
|
} else { \
|
|
/* dest after src: copy backwards */ \
|
|
for (o = (c - 1) * BYTES; c != 0; c--, o -= BYTES) \
|
|
__BS_FUNCTION(bus_space_write,BYTES)(t, h2, o2 + o, \
|
|
__BS_FUNCTION(bus_space_read,BYTES)(t, h1, o1 + o)); \
|
|
} \
|
|
}
|
|
|
|
__bus_space_copy_region(1)
|
|
__bus_space_copy_region(2)
|
|
__bus_space_copy_region(4)
|
|
__bus_space_copy_region(8)
|
|
|
|
|
|
/*
|
|
* Operations which handle byte stream data on word access.
|
|
*
|
|
* These functions are defined to resolve endian mismatch, by either
|
|
* - When normal (i.e. stream-less) operations perform byte swap
|
|
* to resolve endian mismatch, these functions bypass the byte swap.
|
|
* or
|
|
* - When bus bridge performs automatic byte swap, these functions
|
|
* perform byte swap once more, to cancel the bridge's behavior.
|
|
*
|
|
* Mips Computer Systems platforms perform harware byte swapping -
|
|
* therefore the streaming methods can byte swap as determined from
|
|
* the bus space tag settings
|
|
*
|
|
*/
|
|
#define __BUS_SPACE_HAS_STREAM_METHODS
|
|
|
|
/* Force creation of stream methods using the standard template macros */
|
|
#undef __BS_FUNCTION
|
|
#define __BS_FUNCTION(func,BYTES) __CONCAT3(func,_stream_,BYTES)
|
|
|
|
#define __BS_BSWAP(bst, val, BITS) \
|
|
((bst->bs_bswap) ? __CONCAT(bswap,BITS)(val) : (val))
|
|
|
|
|
|
#define __bus_space_read_stream(BYTES,BITS) \
|
|
static __inline __BS_TYPENAME(BITS) \
|
|
__CONCAT(bus_space_read_stream_,BYTES)(bus_space_tag_t bst, \
|
|
bus_space_handle_t bsh, bus_size_t offset) \
|
|
{ \
|
|
register __BS_TYPENAME(BITS) val = \
|
|
__CONCAT(bus_space_read_,BYTES)(bst, bsh, offset); \
|
|
\
|
|
return __BS_BSWAP(bst, val, BITS); \
|
|
}
|
|
|
|
__bus_space_read_stream(2, 16) /* bus_space_read_stream_2 */
|
|
__bus_space_read_stream(4, 32) /* bus_space_read_stream_4 */
|
|
__bus_space_read_stream(8, 64) /* bus_space_read_stream_8 */
|
|
|
|
|
|
#define __bus_space_write_stream(BYTES,BITS) \
|
|
static __inline void \
|
|
__CONCAT(bus_space_write_stream_,BYTES)(bus_space_tag_t bst, \
|
|
bus_space_handle_t bsh, \
|
|
bus_size_t offset, __CONCAT3(u_int,BITS,_t) data) \
|
|
{ \
|
|
*__BS_ADDR(bst, bsh, offset, BITS, BYTES) = \
|
|
__BS_BSWAP(bst, data, BITS); \
|
|
wbflush(); \
|
|
}
|
|
|
|
__bus_space_write_stream(2,16) /* bus_space_write_stream_2 */
|
|
__bus_space_write_stream(4,32) /* bus_space_write_stream_4 */
|
|
__bus_space_write_stream(8,64) /* bus_space_write_stream_8 */
|
|
|
|
__bus_space_read_multi(2,16) /* bus_space_read_multi_stream_2 */
|
|
__bus_space_read_multi(4,32) /* bus_space_read_multi_stream_4 */
|
|
__bus_space_read_multi(8,64) /* bus_space_read_multi_stream_8 */
|
|
|
|
__bus_space_read_region(2,16) /* bus_space_read_region_stream_2 */
|
|
__bus_space_read_region(4,32) /* bus_space_read_region_stream_4 */
|
|
__bus_space_read_region(8,64) /* bus_space_read_region_stream_8 */
|
|
|
|
__bus_space_write_multi(2,16) /* bus_space_write_multi_stream_2 */
|
|
__bus_space_write_multi(4,32) /* bus_space_write_multi_stream_4 */
|
|
__bus_space_write_multi(8,64) /* bus_space_write_multi_stream_8 */
|
|
|
|
__bus_space_write_region(2,16) /* bus_space_write_region_stream_2 */
|
|
__bus_space_write_region(4,32) /* bus_space_write_region_stream_4 */
|
|
__bus_space_write_region(8,64) /* bus_space_write_region_stream_8 */
|
|
|
|
__bus_space_set_multi(2,16) /* bus_space_set_multi_stream_2 */
|
|
__bus_space_set_multi(4,32) /* bus_space_set_multi_stream_4 */
|
|
__bus_space_set_multi(8,64) /* bus_space_set_multi_stream_8 */
|
|
|
|
__bus_space_set_region(2,16) /* bus_space_set_region_stream_2 */
|
|
__bus_space_set_region(4,32) /* bus_space_set_region_stream_4 */
|
|
__bus_space_set_region(8, 64) /* bus_space_set_region_stream_8 */
|
|
|
|
#undef __bus_space_read
|
|
#undef __bus_space_write
|
|
#undef __bus_space_read_stream
|
|
#undef __bus_space_write_stream
|
|
#undef __bus_space_read_multi
|
|
#undef __bus_space_read_region
|
|
#undef __bus_space_write_multi
|
|
#undef __bus_space_write_region
|
|
#undef __bus_space_set_multi
|
|
#undef __bus_space_set_region
|
|
#undef __bus_space_copy_region
|
|
|
|
#undef __BS_TYPENAME
|
|
#undef __BS_OFFSET
|
|
#undef __BS_FUNCTION
|
|
#undef __BS_ADDR
|
|
|
|
/*
|
|
* Bus read/write barrier methods.
|
|
*
|
|
* void bus_space_barrier __P((bus_space_tag_t tag,
|
|
* bus_space_handle_t bsh, bus_size_t offset,
|
|
* bus_size_t len, int flags));
|
|
*
|
|
* On the MIPS, we just flush the write buffer.
|
|
*/
|
|
#define bus_space_barrier(t, h, o, l, f) \
|
|
((void)((void)(t), (void)(h), (void)(o), (void)(l), (void)(f)), \
|
|
wbflush())
|
|
|
|
#define BUS_SPACE_BARRIER_READ 0x01
|
|
#define BUS_SPACE_BARRIER_WRITE 0x02
|
|
|
|
/*
|
|
* Flags used in various bus DMA methods.
|
|
*/
|
|
#define BUS_DMA_WAITOK 0x000 /* safe to sleep (pseudo-flag) */
|
|
#define BUS_DMA_NOWAIT 0x001 /* not safe to sleep */
|
|
#define BUS_DMA_ALLOCNOW 0x002 /* perform resource allocation now */
|
|
#define BUS_DMA_COHERENT 0x004 /* hint: map memory DMA coherent */
|
|
#define BUS_DMA_STREAMING 0x008 /* hint: sequential, unidirectional */
|
|
#define BUS_DMA_BUS1 0x010 /* placeholders for bus functions... */
|
|
#define BUS_DMA_BUS2 0x020
|
|
#define BUS_DMA_BUS3 0x040
|
|
#define BUS_DMA_BUS4 0x080
|
|
#define BUS_DMA_READ 0x100 /* mapping is device -> memory only */
|
|
#define BUS_DMA_WRITE 0x200 /* mapping is memory -> device only */
|
|
|
|
#define MIPSCO_DMAMAP_COHERENT 0x100 /* no cache flush necessary on sync */
|
|
|
|
/* 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 mipsco_bus_dma_tag *bus_dma_tag_t;
|
|
typedef struct mipsco_bus_dmamap *bus_dmamap_t;
|
|
|
|
/*
|
|
* bus_dma_segment_t
|
|
*
|
|
* Describes a single contiguous DMA transaction. Values
|
|
* are suitable for programming into DMA registers.
|
|
*/
|
|
struct mipsco_bus_dma_segment {
|
|
/*
|
|
* PUBLIC MEMBERS: these are used by device drivers.
|
|
*/
|
|
bus_addr_t ds_addr; /* DMA address */
|
|
bus_size_t ds_len; /* length of transfer */
|
|
/*
|
|
* PRIVATE MEMBERS for the DMA back-end.: not for use by drivers.
|
|
*/
|
|
vaddr_t _ds_paddr; /* CPU physical address */
|
|
vaddr_t _ds_vaddr; /* virtual address, 0 if invalid */
|
|
};
|
|
typedef struct mipsco_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 mipsco_bus_dma_tag {
|
|
bus_addr_t dma_offset;
|
|
|
|
/*
|
|
* DMA mapping methods.
|
|
*/
|
|
int (*_dmamap_create) __P((bus_dma_tag_t, bus_size_t, int,
|
|
bus_size_t, bus_size_t, int, bus_dmamap_t *));
|
|
void (*_dmamap_destroy) __P((bus_dma_tag_t, bus_dmamap_t));
|
|
int (*_dmamap_load) __P((bus_dma_tag_t, bus_dmamap_t, void *,
|
|
bus_size_t, struct proc *, int));
|
|
int (*_dmamap_load_mbuf) __P((bus_dma_tag_t, bus_dmamap_t,
|
|
struct mbuf *, int));
|
|
int (*_dmamap_load_uio) __P((bus_dma_tag_t, bus_dmamap_t,
|
|
struct uio *, int));
|
|
int (*_dmamap_load_raw) __P((bus_dma_tag_t, bus_dmamap_t,
|
|
bus_dma_segment_t *, int, bus_size_t, int));
|
|
void (*_dmamap_unload) __P((bus_dma_tag_t, bus_dmamap_t));
|
|
void (*_dmamap_sync) __P((bus_dma_tag_t, bus_dmamap_t,
|
|
bus_addr_t, bus_size_t, int));
|
|
|
|
/*
|
|
* DMA memory utility functions.
|
|
*/
|
|
int (*_dmamem_alloc) __P((bus_dma_tag_t, bus_size_t, bus_size_t,
|
|
bus_size_t, bus_dma_segment_t *, int, int *, int));
|
|
void (*_dmamem_free) __P((bus_dma_tag_t,
|
|
bus_dma_segment_t *, int));
|
|
int (*_dmamem_map) __P((bus_dma_tag_t, bus_dma_segment_t *,
|
|
int, size_t, caddr_t *, int));
|
|
void (*_dmamem_unmap) __P((bus_dma_tag_t, caddr_t, size_t));
|
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paddr_t (*_dmamem_mmap) __P((bus_dma_tag_t, bus_dma_segment_t *,
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int, off_t, int, int));
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};
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#define bus_dmamap_create(t, s, n, m, b, f, p) \
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(*(t)->_dmamap_create)((t), (s), (n), (m), (b), (f), (p))
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#define bus_dmamap_destroy(t, p) \
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(*(t)->_dmamap_destroy)((t), (p))
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#define bus_dmamap_load(t, m, b, s, p, f) \
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(*(t)->_dmamap_load)((t), (m), (b), (s), (p), (f))
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#define bus_dmamap_load_mbuf(t, m, b, f) \
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(*(t)->_dmamap_load_mbuf)((t), (m), (b), (f))
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#define bus_dmamap_load_uio(t, m, u, f) \
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(*(t)->_dmamap_load_uio)((t), (m), (u), (f))
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#define bus_dmamap_load_raw(t, m, sg, n, s, f) \
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(*(t)->_dmamap_load_raw)((t), (m), (sg), (n), (s), (f))
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#define bus_dmamap_unload(t, p) \
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(*(t)->_dmamap_unload)((t), (p))
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#define bus_dmamap_sync(t, p, o, l, ops) \
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(*(t)->_dmamap_sync)((t), (p), (o), (l), (ops))
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#define bus_dmamem_alloc(t, s, a, b, sg, n, r, f) \
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(*(t)->_dmamem_alloc)((t), (s), (a), (b), (sg), (n), (r), (f))
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#define bus_dmamem_free(t, sg, n) \
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(*(t)->_dmamem_free)((t), (sg), (n))
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#define bus_dmamem_map(t, sg, n, s, k, f) \
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(*(t)->_dmamem_map)((t), (sg), (n), (s), (k), (f))
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#define bus_dmamem_unmap(t, k, s) \
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(*(t)->_dmamem_unmap)((t), (k), (s))
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#define bus_dmamem_mmap(t, sg, n, o, p, f) \
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(*(t)->_dmamem_mmap)((t), (sg), (n), (o), (p), (f))
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/*
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* bus_dmamap_t
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*
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* Describes a DMA mapping.
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*/
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struct mipsco_bus_dmamap {
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/*
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* PRIVATE MEMBERS: not for use by machine-independent code.
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*/
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bus_size_t _dm_size; /* largest DMA transfer mappable */
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int _dm_segcnt; /* number of segs this map can map */
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bus_size_t _dm_maxsegsz; /* largest possible segment */
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bus_size_t _dm_boundary; /* don't cross this */
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int _dm_flags; /* misc. flags */
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|
|
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/*
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* Private cookie to be used by the DMA back-end.
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*/
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void *_dm_cookie;
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/*
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* PUBLIC MEMBERS: these are used by machine-independent code.
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*/
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bus_size_t dm_mapsize; /* size of the mapping */
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int dm_nsegs; /* # valid segments in mapping */
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bus_dma_segment_t dm_segs[1]; /* segments; variable length */
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};
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#ifdef _MIPSCO_BUS_DMA_PRIVATE
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int _bus_dmamap_create __P((bus_dma_tag_t, bus_size_t, int, bus_size_t,
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bus_size_t, int, bus_dmamap_t *));
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void _bus_dmamap_destroy __P((bus_dma_tag_t, bus_dmamap_t));
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int _bus_dmamap_load __P((bus_dma_tag_t, bus_dmamap_t, void *,
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bus_size_t, struct proc *, int));
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int _bus_dmamap_load_mbuf __P((bus_dma_tag_t, bus_dmamap_t,
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|
struct mbuf *, int));
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|
int _bus_dmamap_load_uio __P((bus_dma_tag_t, bus_dmamap_t,
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|
struct uio *, int));
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|
int _bus_dmamap_load_raw __P((bus_dma_tag_t, bus_dmamap_t,
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|
bus_dma_segment_t *, int, bus_size_t, int));
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|
void _bus_dmamap_unload __P((bus_dma_tag_t, bus_dmamap_t));
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|
void _bus_dmamap_sync __P((bus_dma_tag_t, bus_dmamap_t, bus_addr_t,
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|
bus_size_t, int));
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|
|
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int _bus_dmamem_alloc __P((bus_dma_tag_t tag, bus_size_t size,
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|
bus_size_t alignment, bus_size_t boundary,
|
|
bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags));
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|
int _bus_dmamem_alloc_range __P((bus_dma_tag_t tag, bus_size_t size,
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|
bus_size_t alignment, bus_size_t boundary,
|
|
bus_dma_segment_t *segs, int nsegs, int *rsegs, int flags,
|
|
paddr_t low, paddr_t high));
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|
void _bus_dmamem_free __P((bus_dma_tag_t tag, bus_dma_segment_t *segs,
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|
int nsegs));
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|
int _bus_dmamem_map __P((bus_dma_tag_t tag, bus_dma_segment_t *segs,
|
|
int nsegs, size_t size, caddr_t *kvap, int flags));
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|
void _bus_dmamem_unmap __P((bus_dma_tag_t tag, caddr_t kva,
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|
size_t size));
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|
paddr_t _bus_dmamem_mmap __P((bus_dma_tag_t tag, bus_dma_segment_t *segs,
|
|
int nsegs, off_t off, int prot, int flags));
|
|
|
|
int _bus_dmamem_alloc_range __P((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,
|
|
paddr_t low, paddr_t high));
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|
#endif /* _MIPSCO_BUS_DMA_PRIVATE */
|
|
|
|
void _bus_dma_tag_init __P((bus_dma_tag_t tag));
|
|
|
|
#endif /* _KERNEL */
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|
#endif /* _MIPSCO_BUS_H_ */
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