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