126 lines
4.5 KiB
C
126 lines
4.5 KiB
C
/*
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* $NetBSD: fdvar.h,v 1.1 1997/04/09 04:49:11 jeremy Exp $
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*
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* Copyright (c) 1995 Paul Kranenburg
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* All rights reserved.
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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 Paul Kranenburg.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#define FDC_BSIZE 512
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#define FDC_MAXIOSIZE NBPG /* XXX should be MAXBSIZE */
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#define FDC_NSTATUS 10
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#ifndef _LOCORE
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struct fdcio {
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/*
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* 82072 (sun4c,sun3x) and 82077 (sun4m) controllers have different
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* register layout; so we cache some here.
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*/
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volatile u_int8_t *fdcio_reg_msr;
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volatile u_int8_t *fdcio_reg_fifo;
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volatile u_int8_t *fdcio_reg_dor; /* 82077 only */
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volatile u_int8_t *fdcio_reg_fcr; /* sun3x floppy control reg */
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volatile u_int8_t *fdcio_reg_fvr; /* sun3x floppy int. vector */
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/*
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* Interrupt state.
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*/
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int fdcio_istate;
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/*
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* IO state.
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*/
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char *fdcio_data; /* pseudo-dma data */
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int fdcio_tc; /* pseudo-dma Terminal Count */
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u_char fdcio_status[FDC_NSTATUS]; /* copy of registers */
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int fdcio_nstat; /* # of valid status bytes */
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/*
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* Statictics.
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*/
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struct evcnt fdcio_intrcnt;
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};
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#endif /* _LOCORE */
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/* istate values */
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#define ISTATE_IDLE 0 /* No HW interrupt expected */
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#define ISTATE_SPURIOUS 1 /* Spurious HW interrupt detected */
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#define ISTATE_SENSEI 2 /* Do SENSEI on next HW interrupt */
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#define ISTATE_DMA 3 /* Pseudo-DMA in progress */
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#define ISTATE_DONE 4 /* Interrupt processing complete */
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#define FD_MAX_NSEC 36 /* highest known number of spt - allow for */
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/* 2.88 MB drives */
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#ifndef _LOCORE
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struct ne7_fd_formb {
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int cyl, head;
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int transfer_rate; /* fdreg.h: FDC_???KBPS */
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union {
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struct fd_form_data {
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/*
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* DO NOT CHANGE THE LAYOUT OF THIS STRUCTS
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* it is hardware-dependant since it exactly
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* matches the byte sequence to write to FDC
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* during its `format track' operation
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*/
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u_char secshift; /* 0 -> 128, ...; usually 2 -> 512 */
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u_char nsecs; /* must be <= FD_MAX_NSEC */
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u_char gaplen; /* GAP 3 length; usually 84 */
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u_char fillbyte; /* usually 0xf6 */
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struct fd_idfield_data {
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/*
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* data to write into id fields;
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* for obscure formats, they mustn't match
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* the real values (but mostly do)
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*/
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u_char cylno; /* 0 thru 79 (or 39) */
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u_char headno; /* 0, or 1 */
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u_char secno; /* starting at 1! */
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u_char secsize; /* usually 2 */
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} idfields[FD_MAX_NSEC]; /* 0 <= idx < nsecs used */
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} structured;
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u_char raw[1]; /* to have continuous indexed access */
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} format_info;
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};
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/* make life easier */
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#define fd_formb_secshift format_info.structured.secshift
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#define fd_formb_nsecs format_info.structured.nsecs
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#define fd_formb_gaplen format_info.structured.gaplen
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#define fd_formb_fillbyte format_info.structured.fillbyte
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/* these data must be filled in for(i = 0; i < fd_formb_nsecs; i++) */
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#define fd_formb_cylno(i) format_info.structured.idfields[i].cylno
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#define fd_formb_headno(i) format_info.structured.idfields[i].headno
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#define fd_formb_secno(i) format_info.structured.idfields[i].secno
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#define fd_formb_secsize(i) format_info.structured.idfields[i].secsize
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#endif /* _LOCORE */
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