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/* $OpenBSD: mscpreg.h,v 1.3 1997/09/10 11:54:42 maja Exp $ */
/* $NetBSD: mscpreg.h,v 1.2 1997/03/15 16:39:20 ragge Exp $ */
/*
* Copyright (c) 1996 Ludd, University of Lule}, Sweden.
* Copyright (c) 1988 Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek.
*
* 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.
*
* @(#)udareg.h 7.3 (Berkeley) 5/8/91
*/
/*
* NRSPL2 and NCMDL2 control the number of response and command
* packets respectively. They may be any value from 0 to 7, though
* setting them higher than 5 is unlikely to be of any value.
* If you get warnings about your command ring being too small,
* try increasing the values by one.
*/
#ifndef NRSP
#define NRSPL2 5
#define NCMDL2 5
#define NRSP (1 << NRSPL2)
#define NCMD (1 << NCMDL2)
#endif
/*
* Communication area definition. This seems to be the same for
* all types of MSCP controllers.
*/
struct mscp_ca {
short ca_xxx1; /* unused */
char ca_xxx2; /* unused */
char ca_bdp; /* BDP to purge */
short ca_cmdint; /* command ring transition flag */
short ca_rspint; /* response ring transition flag */
long ca_rspdsc[NRSP];/* response descriptors */
long ca_cmddsc[NCMD];/* command descriptors */
};
/*
* Simplified routines (e.g., uddump) reprogram the UDA50 for one command
* and one response at a time; uda1ca is like udaca except that it provides
* exactly one command and response descriptor.
*/
struct mscp_1ca {
short ca_xxx1;
char ca_xxx2;
char ca_bdp;
short ca_cmdint;
short ca_rspint;
long ca_rspdsc;
long ca_cmddsc;
};
/*
* Combined communications area and MSCP packet pools, per controller.
* NRSP and NCMD must be defined before this struct is used.
*/
struct mscp_pack {
struct mscp_ca mp_ca; /* communications area */
struct mscp mp_rsp[NRSP]; /* response packets */
struct mscp mp_cmd[NCMD]; /* command packets */
};
/*
* Bits in UDA status register during initialisation
*/
#define MP_ERR 0x8000 /* error */
#define MP_STEP4 0x4000 /* step 4 has started */
#define MP_STEP3 0x2000 /* step 3 has started */
#define MP_STEP2 0x1000 /* step 2 has started */
#define MP_STEP1 0x0800 /* step 1 has started */
#define MP_NV 0x0400 /* no host settable interrupt vector */
#define MP_QB 0x0200 /* controller supports Q22 bus */
#define MP_DI 0x0100 /* controller implements diagnostics */
#define MP_IE 0x0080 /* interrupt enable */
#define MP_NCNRMASK 0x003f /* in STEP1, bits 0-2=NCMDL2, 3-5=NRSPL2 */
#define MP_IVECMASK 0x007f /* in STEP2, bits 0-6 are interruptvec / 4 */
#define MP_PI 0x0001 /* host requests adapter purge interrupts */
#define MP_GO 0x0001 /* Go command to ctlr */
#define ALLSTEPS (MP_ERR | MP_STEP4 | MP_STEP3 | MP_STEP2 | MP_STEP1)
#define STEP0MASK (ALLSTEPS | MP_NV)
#define STEP1MASK (ALLSTEPS | MP_IE | MP_NCNRMASK)
#define STEP1GOOD (MP_STEP2 | MP_IE | (NCMDL2 << 3) | NRSPL2)
#define STEP2MASK (ALLSTEPS | MP_IE | MP_IVECMASK)
#define STEP2GOOD(iv) (MP_STEP3 | MP_IE | (iv))
#define STEP3MASK ALLSTEPS
#define STEP3GOOD MP_STEP4
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