X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/4d15aeb193b2c68f1d38666c317f8d3734f5f083..5ba3f43ea354af8ad55bea84372a2bc834d8757c:/bsd/arm/param.h

diff --git a/bsd/arm/param.h b/bsd/arm/param.h
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+/*
+ * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
+ */
+/*-
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ * (c) UNIX System Laboratories, Inc.
+ * All or some portions of this file are derived from material licensed
+ * to the University of California by American Telephone and Telegraph
+ * Co. or Unix System Laboratories, Inc. and are reproduced herein with
+ * the permission of UNIX System Laboratories, Inc.
+ *
+ * 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.
+ *
+ *	@(#)param.h	8.1 (Berkeley) 4/4/95
+ */
+
+/*
+ * Machine dependent constants for ARM
+ */
+
+#ifndef _ARM_PARAM_H_
+#define _ARM_PARAM_H_
+
+#include <arm/_param.h>
+
+/*
+ * Round p (pointer or byte index) up to a correctly-aligned value for all
+ * data types (int, long, ...).   The result is unsigned int and must be
+ * cast to any desired pointer type.
+ */
+#define	ALIGNBYTES	__DARWIN_ALIGNBYTES
+#define	ALIGN(p)	__DARWIN_ALIGN(p)
+
+#define	NBPG		4096		/* bytes/page */
+#define	PGOFSET		(NBPG-1)	/* byte offset into page */
+#define	PGSHIFT		12		/* LOG2(NBPG) */
+
+#define	DEV_BSIZE	512
+#define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
+#define BLKDEV_IOSIZE	2048
+#define	MAXPHYS		(64 * 1024)	/* max raw I/O transfer size */
+
+#define	CLSIZE		1
+#define	CLSIZELOG2	0
+
+/*
+ * Constants related to network buffer management.
+ * MCLBYTES must be no larger than CLBYTES (the software page size), and,
+ * on machines that exchange pages of input or output buffers with mbuf
+ * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
+ * of the hardware page size.
+ */
+#define	MSIZESHIFT	8			/* 256 */
+#define	MSIZE		(1 << MSIZESHIFT)	/* size of an mbuf */
+#define	MCLSHIFT	11			/* 2048 */
+#define	MCLBYTES	(1 << MCLSHIFT)		/* size of an mbuf cluster */
+#define	MBIGCLSHIFT	12			/* 4096 */
+#define	MBIGCLBYTES	(1 << MBIGCLSHIFT)	/* size of a big cluster */
+#define	M16KCLSHIFT	14			/* 16384 */
+#define	M16KCLBYTES	(1 << M16KCLSHIFT)	/* size of a jumbo cluster */
+
+#define	MCLOFSET	(MCLBYTES - 1)
+#ifndef NMBCLUSTERS
+#define	NMBCLUSTERS	CONFIG_NMBCLUSTERS	/* cl map size */
+#endif
+
+/*
+ * Some macros for units conversion
+ */
+/* Core clicks (NeXT_page_size bytes) to segments and vice versa */
+#define	ctos(x)	(x)
+#define	stoc(x)	(x)
+
+/* Core clicks (4096 bytes) to disk blocks */
+#define	ctod(x)	((x)<<(PGSHIFT-DEV_BSHIFT))
+#define	dtoc(x)	((x)>>(PGSHIFT-DEV_BSHIFT))
+#define	dtob(x)	((x)<<DEV_BSHIFT)
+
+/* clicks to bytes */
+#define	ctob(x)	((x)<<PGSHIFT)
+
+/* bytes to clicks */
+#define	btoc(x)	(((unsigned)(x)+(NBPG-1))>>PGSHIFT)
+
+#ifdef __APPLE__
+#define  btodb(bytes, devBlockSize)         \
+        ((unsigned)(bytes) / devBlockSize)
+#define  dbtob(db, devBlockSize)            \
+        ((unsigned)(db) * devBlockSize)
+#else
+#define	btodb(bytes)	 		/* calculates (bytes / DEV_BSIZE) */ \
+	((unsigned)(bytes) >> DEV_BSHIFT)
+#define	dbtob(db)			/* calculates (db * DEV_BSIZE) */ \
+	((unsigned)(db) << DEV_BSHIFT)
+#endif
+
+/*
+ * Map a ``block device block'' to a file system block.
+ * This should be device dependent, and will be if we
+ * add an entry to cdevsw/bdevsw for that purpose.
+ * For now though just use DEV_BSIZE.
+ */
+#define	bdbtofsb(bn)	((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
+
+/*
+ * Macros to decode (and encode) processor status word.
+ */
+#define STATUS_WORD(rpl, ipl)	(((ipl) << 8) | (rpl))
+#define	USERMODE(x)		(((x) & 3) == 3)
+#define	BASEPRI(x)		(((x) & (255 << 8)) == 0)
+
+
+#if	defined(KERNEL) || defined(STANDALONE)
+#define	DELAY(n) delay(n)
+
+#else	/* defined(KERNEL) || defined(STANDALONE) */
+#define	DELAY(n)	{ int N = (n); while (--N > 0); }
+#endif	/* defined(KERNEL) || defined(STANDALONE) */
+
+#endif /* _ARM_PARAM_H_ */