* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1986, 1990, 1993
* The Regents of the University of California. All rights reserved.
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department, and code derived from software contributed to
* Berkeley by William Jolitz.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 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
* from: Utah $Hdr: mem.c 1.13 89/10/08$
* @(#)mem.c 8.1 (Berkeley) 6/11/93
extern char *vmmap
; /* poor name! */
register struct iovec
*iov
;
while (uio
->uio_resid
> 0 && error
== 0) {
/* minor device 0 is physical memory */
pmap_enter(kernel_pmap
, vmmap
, v
,
uio
->uio_rw
== UIO_READ
? VM_PROT_READ
: VM_PROT_WRITE
,
o
= (int)uio
->uio_offset
& PGOFSET
;
c
= (u_int
)(NBPG
- ((int)iov
->iov_base
& PGOFSET
));
c
= min(c
, (u_int
)(NBPG
- o
));
c
= min(c
, (u_int
)iov
->iov_len
);
error
= uiomove((caddr_t
)&vmmap
[o
], (int)c
, uio
);
pmap_remove(kernel_pmap
, vmmap
, &vmmap
[NBPG
]);
/* minor device 1 is kernel memory */
if (!kernacc((caddr_t
)uio
->uio_offset
, c
,
uio
->uio_rw
== UIO_READ
? B_READ
: B_WRITE
))
error
= uiomove((caddr_t
)uio
->uio_offset
, (int)c
, uio
);
/* minor device 2 is EOF/RATHOLE */
if (uio
->uio_rw
== UIO_READ
)
/* minor device 12 (/dev/zero) is source of nulls on read, rathole on write */
if (uio
->uio_rw
== UIO_WRITE
) {
malloc(CLBYTES
, M_TEMP
, M_WAITOK
);
c
= min(iov
->iov_len
, CLBYTES
);
error
= uiomove(zbuf
, (int)c
, uio
);
/* 386 I/O address space (/dev/ioport[bwl]) is a read/write access to seperate
i/o device address bus, different than memory bus. Semantics here are
very different than ordinary read/write, as if iov_len is a multiple
an implied string move from a single port will be done. Note that lseek
must be used to set the port number reliably. */
tmp
= inb(uio
->uio_offset
);
error
= uiomove (&tmp
, iov
->iov_len
, uio
);
if (!useracc((caddr_t
)iov
->iov_base
,
iov
->iov_len
, uio
->uio_rw
))
insb(uio
->uio_offset
, iov
->iov_base
,
if (iov
->iov_len
== sizeof (short)) {
tmp
= inw(uio
->uio_offset
);
error
= uiomove (&tmp
, iov
->iov_len
, uio
);
if (!useracc((caddr_t
)iov
->iov_base
,
iov
->iov_len
, uio
->uio_rw
))
insw(uio
->uio_offset
, iov
->iov_base
,
iov
->iov_len
/ sizeof (short));
if (iov
->iov_len
== sizeof (long)) {
tmp
= inl(uio
->uio_offset
);
error
= uiomove (&tmp
, iov
->iov_len
, uio
);
if (!useracc((caddr_t
)iov
->iov_base
,
iov
->iov_len
, uio
->uio_rw
))
insl(uio
->uio_offset
, iov
->iov_base
,
iov
->iov_len
/ sizeof (long));