/*
* Copyright (c) 1988 University of Utah.
- * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
- * All rights reserved.
+ * 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.
*
- * %sccs.include.redist.c%
+ * 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.
*
- * from: Utah $Hdr: mem.c 1.13 89/10/08$
+ * 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.
*
- * @(#)mem.c 7.1 (Berkeley) %G%
+ * from: Utah $Hdr: mem.c 1.14 90/10/12$
+ *
+ * @(#)mem.c 8.1 (Berkeley) 6/10/93
*/
/*
* Memory special file
*/
-#include "pte.h"
+#include <sys/param.h>
+#include <sys/conf.h>
+#include <sys/buf.h>
+#include <sys/systm.h>
+#include <sys/malloc.h>
-#include "param.h"
-#include "user.h"
-#include "conf.h"
-#include "buf.h"
-#include "systm.h"
-#include "vm.h"
-#include "cmap.h"
-#include "uio.h"
-#include "malloc.h"
+#include <machine/cpu.h>
-#include "cpu.h"
+#include <vm/vm_param.h>
+#include <vm/lock.h>
+#include <vm/vm_prot.h>
+#include <vm/pmap.h>
/*ARGSUSED*/
mmrw(dev, uio, flags)
register struct iovec *iov;
int error = 0;
caddr_t zbuf = NULL;
+ int kernloc;
extern u_int lowram;
while (uio->uio_resid > 0 && error == 0) {
#ifndef DEBUG
/* allow reads only in RAM (except for DEBUG) */
if (v >= 0xFFFFFFFC || v < lowram)
- goto fault;
+ return (EFAULT);
#endif
- *(int *)mmap = (v & PG_FRAME) | PG_CI | PG_V |
- (uio->uio_rw == UIO_READ ? PG_RO : PG_RW);
- TBIS(vmmap);
+ pmap_enter(kernel_pmap, (vm_offset_t)vmmap,
+ trunc_page(v), uio->uio_rw == UIO_READ ?
+ VM_PROT_READ : VM_PROT_WRITE, TRUE);
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);
+ 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, (vm_offset_t)vmmap,
+ (vm_offset_t)&vmmap[NBPG]);
continue;
/* minor device 1 is kernel memory */
case 1:
- c = iov->iov_len;
- if (!kernacc((caddr_t)uio->uio_offset, c,
+ kernloc = uio->uio_offset;
+ c = min(iov->iov_len, MAXPHYS);
+ if (!kernacc((caddr_t)kernloc, c,
uio->uio_rw == UIO_READ ? B_READ : B_WRITE))
- goto fault;
- error = uiomove((caddr_t)uio->uio_offset, (int)c, uio);
+ return (EFAULT);
+ error = uiomove((caddr_t)kernloc, (int)c, uio);
continue;
/* minor device 2 is EOF/RATHOLE */
case 2:
- if (uio->uio_rw == UIO_READ)
- return (0);
- c = iov->iov_len;
- break;
+ if (uio->uio_rw == UIO_WRITE)
+ uio->uio_resid = 0;
+ return (0);
/* minor device 12 (/dev/zero) is source of nulls on read, rathole on write */
case 12:
malloc(CLBYTES, M_TEMP, M_WAITOK);
bzero(zbuf, CLBYTES);
}
- c = MIN(iov->iov_len, CLBYTES);
+ c = min(iov->iov_len, CLBYTES);
error = uiomove(zbuf, (int)c, uio);
continue;
if (zbuf)
free(zbuf, M_TEMP);
return (error);
-fault:
- return (EFAULT);
}