xnu-2050.24.15.tar.gz

[apple/xnu.git] / bsd / dev / i386 / mem.c

diff --git a/bsd/dev/i386/mem.c b/bsd/dev/i386/mem.c
index 233b5964314aeaf3b3f31d9c8718bffa0b05f67f..61f0d692994acbd0211779d6455621056fdd862f 100644 (file)
--- a/bsd/dev/i386/mem.c
+++ b/bsd/dev/i386/mem.c
@@ -1,16 +1,19 @@
 /*
 /*

- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.

  *
  *

- * @APPLE_LICENSE_HEADER_START@
- * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@

  * 
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in
  * 
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in

- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ * 
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.

  * 
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * 
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER


@@ -20,7 +23,7 @@
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * 
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * 

- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@

  */
 /*-
  * Copyright (c) 1988 University of Utah.
  */
 /*-
  * Copyright (c) 1988 University of Utah.


@@ -73,63 +76,97 @@
 #include <sys/param.h>
 #include <sys/dir.h>
 #include <sys/proc.h>
 #include <sys/param.h>
 #include <sys/dir.h>
 #include <sys/proc.h>

-#include <sys/buf.h>

 #include <sys/systm.h>
 #include <sys/systm.h>

+#include <sys/conf.h>

 #include <sys/vm.h>
 #include <sys/vm.h>

-#include <sys/uio.h>
+#include <sys/uio_internal.h>

 #include <sys/malloc.h>
 
 #include <mach/vm_types.h>
 #include <mach/vm_param.h>
 #include <vm/vm_kern.h>                /* for kernel_map */
 
 #include <sys/malloc.h>
 
 #include <mach/vm_types.h>
 #include <mach/vm_param.h>
 #include <vm/vm_kern.h>                /* for kernel_map */
 

+extern addr64_t  kvtophys(vm_offset_t va); 
+extern boolean_t kernacc(off_t, size_t );
+#if !defined(SECURE_KERNEL)
+extern int setup_kmem;
+#endif
+

 static caddr_t devzerobuf;
 
 static caddr_t devzerobuf;
 

-mmread(dev, uio)
-       dev_t dev;
-       struct uio *uio;
+int mmread(dev_t dev, struct uio *uio);
+int mmwrite(dev_t dev, struct uio *uio);
+int mmioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p);
+int mmrw(dev_t dev, struct uio *uio, enum uio_rw rw);
+
+int
+mmread(dev_t dev, struct uio *uio)

 {
 
        return (mmrw(dev, uio, UIO_READ));
 }
 
 {
 
        return (mmrw(dev, uio, UIO_READ));
 }
 

-mmwrite(dev, uio)
-       dev_t dev;
-       struct uio *uio;
+int
+mmwrite(dev_t dev, struct uio *uio)

 {
 
        return (mmrw(dev, uio, UIO_WRITE));
 }
 
 {
 
        return (mmrw(dev, uio, UIO_WRITE));
 }
 

-mmrw(dev, uio, rw)
-       dev_t dev;
-       struct uio *uio;
-       enum uio_rw rw;
+int
+mmioctl(dev_t dev, u_long cmd, __unused caddr_t data, 
+               __unused int flag, __unused struct proc *p)
+{
+       int minnum = minor(dev);
+
+       if (0 == minnum || 1 == minnum) {
+               /* /dev/mem and /dev/kmem */
+#if defined(SECURE_KERNEL)
+               return (ENODEV);
+#else
+               if (0 == setup_kmem) 
+                       return (EINVAL);
+#endif
+       }
+
+       switch (cmd) {
+       case FIONBIO:
+       case FIOASYNC:
+               /* OK to do nothing: we always return immediately */
+               break;
+       default:
+               return ENODEV;
+       }
+
+       return (0);
+}
+
+int
+mmrw(dev_t dev, struct uio *uio, enum uio_rw rw)

 {
        register int o;
        register u_int c, v;
 {
        register int o;
        register u_int c, v;

-       register struct iovec *iov;

        int error = 0;
        vm_offset_t     where;
        int error = 0;
        vm_offset_t     where;

-       int             spl;

        vm_size_t size;
        vm_size_t size;

-       extern boolean_t kernacc(off_t, size_t );
-
-       while (uio->uio_resid > 0 && error == 0) {
-               iov = uio->uio_iov;
-               if (iov->iov_len == 0) {
-                       uio->uio_iov++;
-                       uio->uio_iovcnt--;
-                       if (uio->uio_iovcnt < 0)
-                               panic("mmrw");
-                       continue;
-               }
+
+
+       while (uio_resid(uio) > 0 && error == 0) {
+               uio_update(uio, 0);
+

                switch (minor(dev)) {
 
                /* minor device 0 is physical memory */
                case 0:
                switch (minor(dev)) {
 
                /* minor device 0 is physical memory */
                case 0:

+#if defined(SECURE_KERNEL)
+                       return(ENODEV);
+#else
+                       if (setup_kmem == 0)
+                               return(ENODEV);
+#endif
+

                        v = trunc_page(uio->uio_offset);
                        v = trunc_page(uio->uio_offset);

-                       if (uio->uio_offset >= mem_size)
+                       if (uio->uio_offset >= (off_t)mem_size)

                                goto fault;
 
                        size= PAGE_SIZE;
                                goto fault;
 
                        size= PAGE_SIZE;


@@ -138,28 +175,35 @@ mmrw(dev, uio, rw)
                                goto fault;
                        }
                        o = uio->uio_offset - v;
                                goto fault;
                        }
                        o = uio->uio_offset - v;

-                       c = min(PAGE_SIZE - o, (u_int)iov->iov_len);
+                       c = min(PAGE_SIZE - o, uio_curriovlen(uio));

                        error = uiomove((caddr_t) (where + o), c, uio);
                        kmem_free(kernel_map, where, PAGE_SIZE);
                        continue;
 
                /* minor device 1 is kernel memory */
                case 1:
                        error = uiomove((caddr_t) (where + o), c, uio);
                        kmem_free(kernel_map, where, PAGE_SIZE);
                        continue;
 
                /* minor device 1 is kernel memory */
                case 1:

+#if defined(SECURE_KERNEL)
+                       return(ENODEV);
+#else
+                       if (setup_kmem == 0)
+                               return(ENODEV);
+#endif

                        /* Do some sanity checking */
                        if (((vm_address_t)uio->uio_offset >= VM_MAX_KERNEL_ADDRESS) ||
                        /* Do some sanity checking */
                        if (((vm_address_t)uio->uio_offset >= VM_MAX_KERNEL_ADDRESS) ||

-                               ((vm_address_t)uio->uio_offset <= VM_MIN_KERNEL_ADDRESS))
+                               ((vm_address_t)uio->uio_offset <= VM_MIN_KERNEL_AND_KEXT_ADDRESS))

                                goto fault;
                                goto fault;

-                       c = iov->iov_len;
+                       c = uio_curriovlen(uio);

                        if (!kernacc(uio->uio_offset, c))
                                goto fault;
                        if (!kernacc(uio->uio_offset, c))
                                goto fault;

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

                        continue;
 
                /* minor device 2 is EOF/RATHOLE */
                case 2:
                        if (rw == UIO_READ)
                                return (0);
                        continue;
 
                /* minor device 2 is EOF/RATHOLE */
                case 2:
                        if (rw == UIO_READ)
                                return (0);

-                       c = iov->iov_len;
+                       c = uio_curriovlen(uio);

                        break;
                case 3:
                        if(devzerobuf == NULL) {
                        break;
                case 3:
                        if(devzerobuf == NULL) {


@@ -167,10 +211,10 @@ mmrw(dev, uio, rw)
                                bzero(devzerobuf, PAGE_SIZE);
                        }
                        if(uio->uio_rw == UIO_WRITE) {
                                bzero(devzerobuf, PAGE_SIZE);
                        }
                        if(uio->uio_rw == UIO_WRITE) {

-                               c = iov->iov_len;
+                               c = uio_curriovlen(uio);

                                break;
                        }
                                break;
                        }

-                       c = min(iov->iov_len, PAGE_SIZE);
+                       c = min(uio_curriovlen(uio), PAGE_SIZE);

                        error = uiomove(devzerobuf, (int)c, uio);
                        continue;
                default:
                        error = uiomove(devzerobuf, (int)c, uio);
                        continue;
                default:


@@ -180,10 +224,7 @@ mmrw(dev, uio, rw)
                        
                if (error)
                        break;
                        
                if (error)
                        break;

-               iov->iov_base += c;
-               iov->iov_len -= c;
-               uio->uio_offset += c;
-               uio->uio_resid -= c;
+               uio_update(uio, c);

        }
        return (error);
 fault:
        }
        return (error);
 fault:


@@ -204,7 +245,7 @@ kernacc(
        end = start + len;
        
        while (base < end) {
        end = start + len;
        
        while (base < end) {

-               if(kvtophys((vm_offset_t)base) == NULL)
+         if(kvtophys((vm_offset_t)base) == 0ULL)

                        return(FALSE);
                base += page_size;
        }   
                        return(FALSE);
                base += page_size;
        }