BSD 4_3_Net_2 release

[unix-history] / usr / src / sys / i386 / i386 / mem.c

diff --git a/usr/src/sys/i386/i386/mem.c b/usr/src/sys/i386/i386/mem.c
index 490cc52..650e21e 100644 (file)
--- a/usr/src/sys/i386/i386/mem.c
+++ b/usr/src/sys/i386/i386/mem.c
@@ -8,30 +8,58 @@
  * Science Department, and code derived from software contributed to
  * Berkeley by William Jolitz.
  *
  * Science Department, and code derived from software contributed to
  * Berkeley by William Jolitz.
  *

- * %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.
+ *
+ * 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.

  *
  * from: Utah $Hdr: mem.c 1.13 89/10/08$
  *
  * from: Utah $Hdr: mem.c 1.13 89/10/08$

- *     @(#)mem.c       5.6 (Berkeley) %G%
+ *     @(#)mem.c       7.2 (Berkeley) 5/9/91

  */
 
 /*
  * Memory special file
  */
 
  */
 
 /*
  * Memory special file
  */
 

-#include "machine/pte.h"
-

 #include "param.h"
 #include "param.h"

-#include "user.h"

 #include "conf.h"
 #include "buf.h"
 #include "systm.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 "uio.h"
 #include "malloc.h"
 
 #include "machine/cpu.h"
 

+#include "vm/vm_param.h"
+#include "vm/lock.h"
+#include "vm/vm_statistics.h"
+#include "vm/pmap.h"
+#include "vm/vm_prot.h"
+
+extern        char *vmmap;            /* poor name! */

 /*ARGSUSED*/
 mmrw(dev, uio, flags)
        dev_t dev;
 /*ARGSUSED*/
 mmrw(dev, uio, flags)
        dev_t dev;


@@ -58,14 +86,15 @@ mmrw(dev, uio, flags)
 /* minor device 0 is physical memory */
                case 0:
                        v = uio->uio_offset;
 /* minor device 0 is physical memory */
                case 0:
                        v = uio->uio_offset;

-                       *(int *)mmap = (v & PG_FRAME) | PG_V |
-                               (uio->uio_rw == UIO_READ ? PG_KR : PG_KW);
-                       load_cr3(u.u_pcb.pcb_cr3);
+                       pmap_enter(pmap_kernel(), vmmap, 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);
                        error = uiomove((caddr_t)&vmmap[o], (int)c, uio);
                        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(pmap_kernel(), vmmap, &vmmap[NBPG]);

                        continue;
 
 /* minor device 1 is kernel memory */
                        continue;
 
 /* minor device 1 is kernel memory */


@@ -73,7 +102,7 @@ mmrw(dev, uio, flags)
                        c = iov->iov_len;
                        if (!kernacc((caddr_t)uio->uio_offset, c,
                            uio->uio_rw == UIO_READ ? B_READ : B_WRITE))
                        c = iov->iov_len;
                        if (!kernacc((caddr_t)uio->uio_offset, c,
                            uio->uio_rw == UIO_READ ? B_READ : B_WRITE))

-                               goto fault;
+                               return(EFAULT);

                        error = uiomove((caddr_t)uio->uio_offset, (int)c, uio);
                        continue;
 
                        error = uiomove((caddr_t)uio->uio_offset, (int)c, uio);
                        continue;
 


@@ -99,6 +128,53 @@ mmrw(dev, uio, flags)
                        error = uiomove(zbuf, (int)c, uio);
                        continue;
 
                        error = uiomove(zbuf, (int)c, uio);
                        continue;
 

+#ifdef notyet
+/* 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. */
+               case 14:
+                       if (iov->iov_len == 1) {
+                               u_char tmp;
+                               tmp = inb(uio->uio_offset);
+                               error = uiomove (&tmp, iov->iov_len, uio);
+                       } else {
+                               if (!useracc((caddr_t)iov->iov_base,
+                                       iov->iov_len, uio->uio_rw))
+                                       return (EFAULT);
+                               insb(uio->uio_offset, iov->iov_base,
+                                       iov->iov_len);
+                       }
+                       break;
+               case 15:
+                       if (iov->iov_len == sizeof (short)) {
+                               u_short tmp;
+                               tmp = inw(uio->uio_offset);
+                               error = uiomove (&tmp, iov->iov_len, uio);
+                       } else {
+                               if (!useracc((caddr_t)iov->iov_base,
+                                       iov->iov_len, uio->uio_rw))
+                                       return (EFAULT);
+                               insw(uio->uio_offset, iov->iov_base,
+                                       iov->iov_len/ sizeof (short));
+                       }
+                       break;
+               case 16:
+                       if (iov->iov_len == sizeof (long)) {
+                               u_long tmp;
+                               tmp = inl(uio->uio_offset);
+                               error = uiomove (&tmp, iov->iov_len, uio);
+                       } else {
+                               if (!useracc((caddr_t)iov->iov_base,
+                                       iov->iov_len, uio->uio_rw))
+                                       return (EFAULT);
+                               insl(uio->uio_offset, iov->iov_base,
+                                       iov->iov_len/ sizeof (long));
+                       }
+                       break;
+#endif
+

                default:
                        return (ENXIO);
                }
                default:
                        return (ENXIO);
                }


@@ -112,6 +188,4 @@ mmrw(dev, uio, flags)
        if (zbuf)
                free(zbuf, M_TEMP);
        return (error);
        if (zbuf)
                free(zbuf, M_TEMP);
        return (error);

-fault:
-       return (EFAULT);

 }
 }