Annotation of sys/arch/mvme88k/dev/memdevs.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: memdevs.c,v 1.5 2003/10/05 20:27:48 miod Exp $ */
! 2:
! 3: /*
! 4: * Copyright (c) 1995 Theo de Raadt
! 5: * All rights reserved.
! 6: *
! 7: * Redistribution and use in source and binary forms, with or without
! 8: * modification, are permitted provided that the following conditions
! 9: * are met:
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: *
! 16: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 17: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 18: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 19: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 20: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 21: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 22: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 23: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 24: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 25: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 26: */
! 27:
! 28: #include <sys/param.h>
! 29: #include <sys/conf.h>
! 30: #include <sys/buf.h>
! 31: #include <sys/systm.h>
! 32: #include <sys/uio.h>
! 33: #include <sys/malloc.h>
! 34: #include <sys/device.h>
! 35:
! 36: #include <machine/autoconf.h>
! 37: #include <machine/cpu.h>
! 38:
! 39: #include <mvme88k/dev/memdevs.h>
! 40:
! 41: /*ARGSUSED*/
! 42: int
! 43: memdevrw(base, len, uio, flags)
! 44: caddr_t base;
! 45: int len;
! 46: struct uio *uio;
! 47: int flags;
! 48: {
! 49: vaddr_t v;
! 50: int c;
! 51: struct iovec *iov;
! 52: int error = 0;
! 53:
! 54: while (uio->uio_resid > 0 && error == 0) {
! 55: iov = uio->uio_iov;
! 56: if (iov->iov_len == 0) {
! 57: uio->uio_iov++;
! 58: uio->uio_iovcnt--;
! 59: if (uio->uio_iovcnt < 0)
! 60: panic("memdevrw");
! 61: continue;
! 62: }
! 63:
! 64: v = uio->uio_offset;
! 65: c = min(iov->iov_len, MAXPHYS);
! 66: if (v + c > len)
! 67: c = len - v; /* till end of dev */
! 68: if (c == 0)
! 69: return (0);
! 70: error = uiomove(base + v, c, uio);
! 71: }
! 72: return (error);
! 73: }
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