sys/arch/arc/jazz/jazzdmatlbreg.h

   1 /*      $NetBSD: jazzdmatlbreg.h,v 1.2.30.1 2005/01/24 08:34:05 skrll Exp $     */
   2 /*      $OpenBSD: dma.h,v 1.3 1997/04/19 17:19:51 pefo Exp $    */
   3
   4 /*
   5  * Copyright (c) 1996 Per Fogelstrom
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by Per Fogelstrom.
  19  * 4. The name of the author may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 /*
  35  *      The R4030 system has four DMA channels capable of scatter/gather
  36  *      and full memory addressing. The maximum transfer length is 1Mb.
  37  *      DMA snopes the L2 cache so no precaution is required. However
  38  *      if L1 cache is cached 'write back' the processor is responible
  39  *      for flushing/invalidating it.
  40  *
  41  *      The DMA mapper has up to 4096 page descriptors.
  42  */
  43
  44 /* XXX */
  45 #define PICA_TL_BASE            0xa0180000      /* Base of tl register area */
  46 #define JAZZ_DMATLB_SIZE        0x00008000      /* Size of tl register area */
  47
  48 #define JAZZ_DMATLBREG_MAP      0x00            /* DMA transl. table base */
  49 #define JAZZ_DMATLBREG_LIMIT    0x08            /* DMA transl. table limit */
  50 #define JAZZ_DMATLBREG_IVALID   0x10            /* DMA transl. cache inval */
  51 #define JAZZ_DMATLB_REGSIZE     0x18            /* size of bus_space region */
  52
  53 #define JAZZ_DMA_PAGE_SIZE      0x00001000              /* Address page size */
  54 #define JAZZ_DMA_PAGE_OFFS      (JAZZ_DMA_PAGE_SIZE-1)  /* page offset */
  55 #define JAZZ_DMA_PAGE_NUM       (~JAZZ_DMA_PAGE_OFFS)   /* page number */
  56
  57 #define jazz_dma_page_offs(x)   \
  58         ((int)(x) & JAZZ_DMA_PAGE_OFFS)
  59 #define jazz_dma_page_round(x)  \
  60         (((int)(x) + JAZZ_DMA_PAGE_OFFS) & JAZZ_DMA_PAGE_NUM)
  61
  62 /*
  63  *  DMA TLB entry
  64  */
  65
  66 typedef struct jazz_dma_pte {
  67         uint32_t        lo_addr;        /* Low part of translation addr */
  68         uint32_t        hi_addr;        /* High part of translation addr */
  69 } jazz_dma_pte_t;