X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/9bccf70c0258c7cac2dcb80011b2a964d884c552..8ad349bb6ed4a0be06e34c92be0d98b92e078db4:/bsd/sys/param.h

diff --git a/bsd/sys/param.h b/bsd/sys/param.h
index f8ee80b46..d1015ce8e 100644
--- a/bsd/sys/param.h
+++ b/bsd/sys/param.h
@@ -1,23 +1,31 @@
 /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
  * 
- * @APPLE_LICENSE_HEADER_END@
+ * 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.  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 
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
+ * Please see the License for the specific language governing rights and 
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  */
 /* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */
 /*-
@@ -70,9 +78,11 @@
 #define NeXTBSD	1995064		/* NeXTBSD version (year, month, release) */
 #define NeXTBSD4_0 0		/* NeXTBSD 4.0 */
 
+#include <sys/_types.h>
+
 #ifndef NULL
-#define	NULL	0
-#endif
+#define	NULL	__DARWIN_NULL
+#endif /* ! NULL */
 
 #ifndef LOCORE
 #include <sys/types.h>
@@ -100,16 +110,18 @@
 
 /* Machine type dependent parameters. */
 #include <machine/param.h>
-#include <machine/limits.h>
 
 /* More types and definitions used throughout the kernel. */
 #ifdef KERNEL
+#include <machine/limits.h>
 #include <sys/cdefs.h>
 #include <sys/errno.h>
 #include <sys/time.h>
 #include <sys/resource.h>
 #include <sys/ucred.h>
 #include <sys/uio.h>
+#else
+#include <limits.h>
 #endif
 
 /* Signals. */
@@ -135,6 +147,7 @@
 #define	PRIMASK	0x0ff
 #define	PCATCH	0x100		/* OR'd with pri for tsleep to check signals */
 #define PTTYBLOCK 0x200		/* for tty SIGTTOU and SIGTTIN blocking */
+#define PDROP	0x400		/* OR'd with pri to stop re-entry of interlock mutex */
 
 #define	NZERO	0		/* default "nice" */
 
@@ -173,16 +186,20 @@
 /*
  * File system parameters and macros.
  *
- * The file system is made out of blocks of at most MAXBSIZE units, with
+ * The file system is made out of blocks of at most MAXPHYS units, with
  * smaller units (fragments) only in the last direct block.  MAXBSIZE
  * primarily determines the size of buffers in the buffer pool.  It may be
- * made larger without any effect on existing file systems; however making
- * it smaller make make some file systems unmountable.
+ * made larger than MAXPHYS without any effect on existing file systems;
+ * however making it smaller may make some file systems unmountable.
+ * We set this to track the value of (MAX_UPL_TRANSFER*PAGE_SIZE) from
+ * osfmk/mach/memory_object_types.h to bound it at the maximum UPL size.
  */
-#define	MAXBSIZE	MAXPHYS
+#define	MAXBSIZE	(256 * 4096)
 #define MAXPHYSIO	MAXPHYS
 #define MAXFRAG 	8
 
+#define	MAXPHYSIO_WIRED	(16 * 1024 * 1024)
+
 /*
  * MAXPATHLEN defines the longest permissable path length after expanding
  * symbolic links. It is used to allocate a temporary buffer from the buffer