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Annotation of sys/arch/vax/include/sgmap.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: sgmap.h,v 1.6 2003/11/10 21:05:06 miod Exp $  */
        !             2: /* $NetBSD: sgmap.h,v 1.3 2000/05/17 21:22:18 matt Exp $ */
        !             3:
        !             4: /*-
        !             5:  * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
        !             6:  * All rights reserved.
        !             7:  *
        !             8:  * This code is derived from software contributed to The NetBSD Foundation
        !             9:  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
        !            10:  * NASA Ames Research Center.
        !            11:  *
        !            12:  * Redistribution and use in source and binary forms, with or without
        !            13:  * modification, are permitted provided that the following conditions
        !            14:  * are met:
        !            15:  * 1. Redistributions of source code must retain the above copyright
        !            16:  *    notice, this list of conditions and the following disclaimer.
        !            17:  * 2. Redistributions in binary form must reproduce the above copyright
        !            18:  *    notice, this list of conditions and the following disclaimer in the
        !            19:  *    documentation and/or other materials provided with the distribution.
        !            20:  * 3. All advertising materials mentioning features or use of this software
        !            21:  *    must display the following acknowledgement:
        !            22:  *     This product includes software developed by the NetBSD
        !            23:  *     Foundation, Inc. and its contributors.
        !            24:  * 4. Neither the name of The NetBSD Foundation nor the names of its
        !            25:  *    contributors may be used to endorse or promote products derived
        !            26:  *    from this software without specific prior written permission.
        !            27:  *
        !            28:  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
        !            29:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
        !            30:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
        !            31:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
        !            32:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
        !            33:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
        !            34:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
        !            35:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
        !            36:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
        !            37:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
        !            38:  * POSSIBILITY OF SUCH DAMAGE.
        !            39:  */
        !            40:
        !            41: #ifndef        _VAX_COMMON_SGMAPVAR_H
        !            42: #define        _VAX_COMMON_SGMAPVAR_H
        !            43:
        !            44: #include <sys/extent.h>
        !            45: #include <machine/bus.h>
        !            46: #include <machine/pte.h>
        !            47:
        !            48: /*
        !            49:  * A VAX SGMAP's state information.  Nothing in the sgmap requires
        !            50:  * locking[*], with the exception of the extent map.  Locking of the
        !            51:  * extent map is handled within the extent manager itself.
        !            52:  *
        !            53:  * [*] While the page table is a `global' resource, access to it is
        !            54:  * controlled by the extent map; once a region has been allocated from
        !            55:  * the map, that region is effectively `locked'.
        !            56:  */
        !            57: struct vax_sgmap {
        !            58:        struct extent *aps_ex;          /* extent map to manage sgva space */
        !            59:        pt_entry_t *aps_pt;             /* page table */
        !            60:        bus_addr_t aps_sgvabase;        /* base of the sgva space */
        !            61:        bus_size_t aps_sgvasize;        /* size of the sgva space */
        !            62:        bus_addr_t aps_pa;              /* Address in region */
        !            63:        unsigned int aps_flags;         /* flags */
        !            64: };
        !            65:
        !            66: void   vax_sgmap_init(bus_dma_tag_t, struct vax_sgmap *,
        !            67:            const char *, bus_addr_t, bus_size_t, pt_entry_t *, bus_size_t);
        !            68:
        !            69: int    vax_sgmap_alloc(bus_dmamap_t, bus_size_t,
        !            70:            struct vax_sgmap *, int);
        !            71: void   vax_sgmap_free(bus_dmamap_t, struct vax_sgmap *);
        !            72:
        !            73: int     vax_sgmap_load(bus_dma_tag_t, bus_dmamap_t, void *,
        !            74:            bus_size_t, struct proc *, int, struct vax_sgmap *);
        !            75:
        !            76: int    vax_sgmap_load_mbuf(bus_dma_tag_t, bus_dmamap_t,
        !            77:            struct mbuf *, int, struct vax_sgmap *);
        !            78:
        !            79: int     vax_sgmap_load_uio(bus_dma_tag_t, bus_dmamap_t,
        !            80:            struct uio *, int, struct vax_sgmap *);
        !            81:
        !            82: int    vax_sgmap_load_raw(bus_dma_tag_t, bus_dmamap_t,
        !            83:            bus_dma_segment_t *, int, bus_size_t, int, struct vax_sgmap *);
        !            84:
        !            85: void   vax_sgmap_unload( bus_dma_tag_t, bus_dmamap_t,
        !            86:            struct vax_sgmap *);
        !            87:
        !            88: #endif /* _VAX_COMMON_SGMAPVAR_H */