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Annotation of sys/arch/alpha/dev/sgmapvar.h, Revision 1.1.1.1

1.1       nbrk        1: /* $OpenBSD: sgmapvar.h,v 1.4 2006/04/04 21:18:43 brad Exp $ */
                      2: /* $NetBSD: sgmapvar.h,v 1.10 1998/08/14 16:50:02 thorpej 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        _ALPHA_COMMON_SGMAPVAR_H
                     42: #define        _ALPHA_COMMON_SGMAPVAR_H
                     43:
                     44: #include <sys/extent.h>
                     45: #include <machine/bus.h>
                     46:
                     47: /*
                     48:  * Bits n:13 of the DMA address are the index of the PTE into
                     49:  * the SGMAP page table.
                     50:  */
                     51: #define        SGMAP_ADDR_PTEIDX_SHIFT 13
                     52:
                     53: /*
                     54:  * An Alpha SGMAP's state information.  Nothing in the sgmap requires
                     55:  * locking[*], with the exception of the extent map.  Locking of the
                     56:  * extent map is handled within the extent manager itself.
                     57:  *
                     58:  * [*] While the page table is a `global' resource, access to it is
                     59:  * controlled by the extent map; once a region has been allocated from
                     60:  * the map, that region is effectively `locked'.
                     61:  */
                     62: struct alpha_sgmap {
                     63:        struct extent *aps_ex;          /* extent map to manage sgva space */
                     64:        void    *aps_pt;                /* page table */
                     65:        bus_addr_t aps_ptpa;            /* page table physical address */
                     66:        bus_addr_t aps_sgvabase;        /* base of the sgva space */
                     67:        bus_size_t aps_sgvasize;        /* size of the sgva space */
                     68:        bus_addr_t aps_wbase;           /* base of the dma window */
                     69: };
                     70:
                     71: extern vaddr_t alpha_sgmap_prefetch_spill_page_va;
                     72: extern bus_addr_t alpha_sgmap_prefetch_spill_page_pa;
                     73:
                     74: void   alpha_sgmap_init(bus_dma_tag_t, struct alpha_sgmap *,
                     75:            const char *, bus_addr_t, bus_addr_t, bus_size_t, size_t, void *,
                     76:            bus_size_t);
                     77:
                     78: int    alpha_sgmap_dmamap_create(bus_dma_tag_t, bus_size_t, int, bus_size_t,
                     79:            bus_size_t, int, bus_dmamap_t *);
                     80: void   alpha_sgmap_dmamap_destroy(bus_dma_tag_t, bus_dmamap_t);
                     81:
                     82: #endif /* _ALPHA_COMMON_SGMAPVAR_H */