Home | History | Annotate | Line # | Download | only in jazz 
      1 /*	$NetBSD: jazzdmatlbreg.h,v 1.5 2023/06/25 15:36:11 andvar 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 responsible
     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;
     70