141 lines
4.6 KiB
C
141 lines
4.6 KiB
C
/* $NetBSD: dmareg.h,v 1.12 1997/05/05 21:02:40 thorpej Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1982, 1990, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* 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 University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
|
|
*
|
|
* @(#)dmareg.h 8.1 (Berkeley) 6/10/93
|
|
*/
|
|
|
|
#include <hp300/dev/iotypes.h> /* XXX */
|
|
#include <machine/hp300spu.h>
|
|
|
|
/*
|
|
* Hardware layout for the 98620[ABC]:
|
|
* 98620A (old 320s?): byte/word DMA in up to 64K chunks
|
|
* 98620B (320s only): 98620A with programmable IPL
|
|
* 98620C (all others): byte/word/longword DMA in up to 4Gb chunks
|
|
*/
|
|
|
|
struct dmaBdevice {
|
|
v_char *dmaB_addr;
|
|
vu_short dmaB_count;
|
|
vu_short dmaB_cmd;
|
|
#define dmaB_stat dmaB_cmd
|
|
};
|
|
|
|
struct dmadevice {
|
|
v_char *dma_addr;
|
|
vu_int dma_count;
|
|
vu_short dma_cmd;
|
|
vu_short dma_stat;
|
|
};
|
|
|
|
struct dmareg {
|
|
struct dmaBdevice dma_Bchan0;
|
|
struct dmaBdevice dma_Bchan1;
|
|
/* the rest are 98620C specific */
|
|
v_char dma_id[4];
|
|
vu_char dma_cr;
|
|
char dma_pad1[0xEB];
|
|
struct dmadevice dma_chan0;
|
|
char dma_pad2[0xF4];
|
|
struct dmadevice dma_chan1;
|
|
};
|
|
|
|
/* The hp300 has 2 DMA channels. */
|
|
#define NDMACHAN 2
|
|
|
|
/* addresses */
|
|
#define DMA_BASE IIOV(0x500000)
|
|
|
|
/* command bits */
|
|
#define DMA_ENAB 0x0001
|
|
#define DMA_WORD 0x0002
|
|
#define DMA_WRT 0x0004
|
|
#define DMA_PRI 0x0008
|
|
#define DMA_IPL(x) (((x) - 3) << 4)
|
|
#define DMA_LWORD 0x0100
|
|
#define DMA_START 0x8000
|
|
|
|
/* status bits */
|
|
#define DMA_ARMED 0x01
|
|
#define DMA_INTR 0x02
|
|
#define DMA_ACC 0x04
|
|
#define DMA_HALT 0x08
|
|
#define DMA_BERR 0x10
|
|
#define DMA_ALIGN 0x20
|
|
#define DMA_WRAP 0x40
|
|
|
|
#ifdef _KERNEL
|
|
/*
|
|
* Macros to attempt to hide the HW differences between the 98620B DMA
|
|
* board and the 1TQ4-0401 DMA chip (68020C "board"). The latter
|
|
* includes emulation registers for the former but you need to access
|
|
* the "native-mode" registers directly in order to do 32-bit DMA.
|
|
*
|
|
* DMA_CLEAR: Clear interrupt on DMA board. We just use the
|
|
* emulation registers on the 98620C as that is easiest.
|
|
* DMA_STAT: Read status register. Again, we always read the
|
|
* emulation register. Someday we might want to
|
|
* look at the 98620C status to get the extended bits.
|
|
* DMA_ARM: Load address, count and kick-off DMA.
|
|
*/
|
|
#define DMA_CLEAR(dc) do { \
|
|
v_int dmaclr; \
|
|
dmaclr = (int)dc->dm_Bhwaddr->dmaB_addr; \
|
|
} while (0);
|
|
#define DMA_STAT(dc) dc->dm_Bhwaddr->dmaB_stat
|
|
|
|
#if defined(HP320)
|
|
#define DMA_ARM(sc, dc) \
|
|
if (sc->sc_type == DMA_B) { \
|
|
struct dmaBdevice *dma = dc->dm_Bhwaddr; \
|
|
dma->dmaB_addr = dc->dm_chain[dc->dm_cur].dc_addr; \
|
|
dma->dmaB_count = dc->dm_chain[dc->dm_cur].dc_count - 1; \
|
|
dma->dmaB_cmd = dc->dm_cmd; \
|
|
} else { \
|
|
struct dmadevice *dma = dc->dm_hwaddr; \
|
|
dma->dma_addr = dc->dm_chain[dc->dm_cur].dc_addr; \
|
|
dma->dma_count = dc->dm_chain[dc->dm_cur].dc_count - 1; \
|
|
dma->dma_cmd = dc->dm_cmd; \
|
|
}
|
|
#else
|
|
#define DMA_ARM(sc, dc) \
|
|
{ \
|
|
struct dmadevice *dma = dc->dm_hwaddr; \
|
|
dma->dma_addr = dc->dm_chain[dc->dm_cur].dc_addr; \
|
|
dma->dma_count = dc->dm_chain[dc->dm_cur].dc_count - 1; \
|
|
dma->dma_cmd = dc->dm_cmd; \
|
|
}
|
|
#endif
|
|
#endif
|