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      1 /*	$NetBSD: bus_private.h,v 1.10 2019/02/14 06:59:24 cherry Exp $	*/
      2 
      3 /*-
      4  * Copyright (c)2005 YAMAMOTO Takashi,
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <uvm/uvm_extern.h>
     30 #include "opt_xen.h"
     31 
     32 #ifdef XENPV
     33 #define	_BUS_PHYS_TO_BUS(pa)	((bus_addr_t)xpmap_ptom(pa))
     34 #define	_BUS_BUS_TO_PHYS(ba)	((paddr_t)xpmap_mtop(ba))
     35 #define	_BUS_VIRT_TO_BUS(pm, va) _bus_virt_to_bus((pm), (va))
     36 #define _BUS_BUS_TO_VM_PAGE(ba) (PHYS_TO_VM_PAGE(xpmap_mtop(ba)))
     37 #define _BUS_PMAP_ENTER(pmap, va, ba, prot, flags) \
     38     pmap_enter(pmap, va, xpmap_mtop(ba), prot, flags)
     39 
     40 static __inline bus_addr_t _bus_virt_to_bus(struct pmap *, vaddr_t);
     41 
     42 static __inline bus_addr_t
     43 _bus_virt_to_bus(struct pmap *pm, vaddr_t va)
     44 {
     45 	bus_addr_t ba;
     46 
     47 	if (!pmap_extract_ma(pm, va, &ba)) {
     48 		panic("_bus_virt_to_bus");
     49 	}
     50 
     51 	return ba;
     52 }
     53 
     54 /* we need our own bus_dmamem_alloc_range */
     55 #define _BUS_DMAMEM_ALLOC_RANGE _xen_bus_dmamem_alloc_range
     56 int _xen_bus_dmamem_alloc_range(bus_dma_tag_t, bus_size_t, bus_size_t,
     57 	    bus_size_t, bus_dma_segment_t *, int, int *, int,
     58 	    bus_addr_t, bus_addr_t);
     59 
     60 /*
     61  * The higher machine address of our allocated range isn't know and can change
     62  * over time. Just assume it's the largest possible value.
     63  */
     64 #if defined(_LP64) || defined(PAE)
     65 #define _BUS_AVAIL_END ((bus_addr_t)0xffffffffffffffff)
     66 #else
     67 #define _BUS_AVAIL_END ((bus_addr_t)0xffffffff)
     68 #endif
     69 #endif /* XENPV */
     70 #include <x86/bus_private.h>
     71 
     72