126 lines
4.6 KiB
C
126 lines
4.6 KiB
C
/* $NetBSD: mscpreg.h,v 1.4 1999/05/29 19:12:53 ragge Exp $ */
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/*
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* Copyright (c) 1996 Ludd, University of Lule}, Sweden.
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* Copyright (c) 1988 Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)udareg.h 7.3 (Berkeley) 5/8/91
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*/
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/*
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* NRSPL2 and NCMDL2 control the number of response and command
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* packets respectively. They may be any value from 0 to 7, though
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* setting them higher than 5 is unlikely to be of any value.
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* If you get warnings about your command ring being too small,
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* try increasing the values by one.
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*/
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#ifndef NRSP
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#define NRSPL2 5
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#define NCMDL2 5
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#define NRSP (1 << NRSPL2)
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#define NCMD (1 << NCMDL2)
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#endif
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/*
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* Communication area definition. This seems to be the same for
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* all types of MSCP controllers.
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*/
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struct mscp_ca {
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short ca_xxx1; /* unused */
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char ca_xxx2; /* unused */
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char ca_bdp; /* BDP to purge */
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short ca_cmdint; /* command ring transition flag */
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short ca_rspint; /* response ring transition flag */
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long ca_rspdsc[NRSP];/* response descriptors */
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long ca_cmddsc[NCMD];/* command descriptors */
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};
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/*
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* Simplified routines (e.g., uddump) reprogram the UDA50 for one command
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* and one response at a time; uda1ca is like udaca except that it provides
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* exactly one command and response descriptor.
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*/
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struct mscp_1ca {
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short ca_xxx1;
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char ca_xxx2;
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char ca_bdp;
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short ca_cmdint;
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short ca_rspint;
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long ca_rspdsc;
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long ca_cmddsc;
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};
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/*
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* Combined communications area and MSCP packet pools, per controller.
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* NRSP and NCMD must be defined before this struct is used.
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*/
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struct mscp_pack {
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struct mscp_ca mp_ca; /* communications area */
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struct mscp mp_rsp[NRSP]; /* response packets */
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struct mscp mp_cmd[NCMD]; /* command packets */
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};
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/*
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* Bits in UDA status register during initialisation
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*/
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#define MP_ERR 0x8000 /* error */
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#define MP_STEP4 0x4000 /* step 4 has started */
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#define MP_STEP3 0x2000 /* step 3 has started */
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#define MP_STEP2 0x1000 /* step 2 has started */
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#define MP_STEP1 0x0800 /* step 1 has started */
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#define MP_NV 0x0400 /* no host settable interrupt vector */
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#define MP_QB 0x0200 /* controller supports Q22 bus */
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#define MP_DI 0x0100 /* controller implements diagnostics */
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#define MP_IE 0x0080 /* interrupt enable */
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#define MP_NCNRMASK 0x003f /* in STEP1, bits 0-2=NCMDL2, 3-5=NRSPL2 */
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#define MP_IVECMASK 0x007f /* in STEP2, bits 0-6 are interruptvec / 4 */
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#define MP_PI 0x0001 /* host requests adapter purge interrupts */
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#define MP_GO 0x0001 /* Go command to ctlr */
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#define ALLSTEPS (MP_ERR | MP_STEP4 | MP_STEP3 | MP_STEP2 | MP_STEP1)
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#define STEP0MASK (ALLSTEPS | MP_NV)
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#define STEP1MASK (ALLSTEPS | MP_IE | MP_NCNRMASK)
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#define STEP1GOOD (MP_STEP2 | MP_IE | (NCMDL2 << 3) | NRSPL2)
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#define STEP2MASK (ALLSTEPS | MP_IE | MP_IVECMASK)
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#define STEP2GOOD(iv) (MP_STEP3 | MP_IE | (iv))
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#define STEP3MASK ALLSTEPS
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#define STEP3GOOD MP_STEP4
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