text: /*	$NetBSD: usb_mem.h,v 1.16 2002/05/19 06:24:33 augustss Exp $	*/
  /*	$FreeBSD: src/sys/dev/usb/usb_mem.h,v 1.9 1999/11/17 22:33:47 n_hibma Exp $	*/
  
  /*
   * Copyright (c) 1998 The NetBSD Foundation, Inc.
   * All rights reserved.
   *
   * This code is derived from software contributed to The NetBSD Foundation
   * by Lennart Augustsson (lennart@augustsson.net) at
   * Carlstedt Research & Technology.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *        This product includes software developed by the NetBSD
   *        Foundation, Inc. and its contributors.
   * 4. Neither the name of The NetBSD Foundation nor the names of its
   *    contributors may be used to endorse or promote products derived
   *    from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  
  #if defined(__NetBSD__) || defined(__OpenBSD__)
  typedef struct usb_dma_block {
  	bus_dma_tag_t tag;
  	bus_dmamap_t map;
          caddr_t kaddr;
          bus_dma_segment_t segs[1];
          int nsegs;
          size_t size;
          size_t align;
  	int fullblock;
  	LIST_ENTRY(usb_dma_block) next;
  } usb_dma_block_t;
  
  #define DMAADDR(dma) ((dma)->block->map->dm_segs[0].ds_addr + (dma)->offs)
  #define KERNADDR(dma, o) \
  	((void *)((char *)((dma)->block->kaddr + (dma)->offs) + (o)))
  
  usbd_status	usb_allocmem(usbd_bus_handle,size_t,size_t, usb_dma_t *);
  void		usb_freemem(usbd_bus_handle, usb_dma_t *);
  
  #elif defined(__FreeBSD__)
  
  /* 
   * FreeBSD does not have special functions for dma memory, so let's keep it
   * simple for now.
   */
  
  #include <sys/param.h>
  #include <sys/systm.h>
  #include <sys/queue.h>
  #include <sys/proc.h>
  #include <sys/buf.h>
  #include <sys/malloc.h>
  #include <sys/kernel.h>
  #include <vm/vm.h>
  
  #define		usb_allocmem(t,s,a,p)	(*(p) = malloc(s, M_USB, M_NOWAIT), (*(p) == NULL? USBD_NOMEM: USBD_NORMAL_COMPLETION))
  #define		usb_freemem(t,p)	(free(*(p), M_USB))
  
  #ifdef __alpha__
  #define DMAADDR(dma)	(alpha_XXX_dmamap((vm_offset_t) *(dma)))
  #else
  #define DMAADDR(dma)	(vtophys(*(dma)))
  #endif
  #define KERNADDR(dma, o)	((void *) ((char *)*(dma) + (o)))
  #endif
  
  