PowerPC platform-specific definitions (modeled on sys/i386/include/param.h)

sys/powerpc/include/param.h

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+/*-
+ * Copyright (c) 2001 David E. O'Brien
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * William Jolitz.
+ *
+ * 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: @(#)param.h	5.8 (Berkeley) 6/28/91
+ * $FreeBSD$
+ */
+
+/*
+ * Machine dependent constants for PowerPC (32-bit only currently)
+ */
+
+/*
+ * 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.
+ */
+#ifndef _ALIGNBYTES
+#define	_ALIGNBYTES	(sizeof(int) - 1)
+#endif
+#ifndef _ALIGN
+#define	_ALIGN(p)	(((unsigned)(p) + _ALIGNBYTES) & ~_ALIGNBYTES)
+#endif
+
+#ifndef	_MACHINE
+#define	_MACHIN		"powerpc"
+#endif
+#ifndef _MACHINE_ARCH
+#define	_MACHINE_ARCH	"powerpc"
+#endif
+
+#ifndef _NO_NAMESPACE_POLLUTION
+
+#ifndef _MACHINE_PARAM_H_
+#define	_MACHINE_PARAM_H_
+
+#ifndef MACHINE
+#define	MACHINE		"powerpc"
+#endif
+#ifndef MACHINE_ARCH
+#define	MACHINE_ARCH	"powerpc"
+#endif
+#define	MID_MACHINE	MID_POWERPC
+
+#include <machine/cpu.h>
+
+/*
+ * OBJFORMAT_NAMES is a comma-separated list of the object formats
+ * that are supported on the architecture.
+ */
+#define	OBJFORMAT_NAMES		"elf"
+#define	OBJFORMAT_DEFAULT	"elf"
+
+#ifdef SMP
+#define	MAXCPU		2
+#else
+#define	MAXCPU		1
+#endif /* SMP */
+
+#define	ALIGNBYTES	_ALIGNBYTES
+#define	ALIGN(p)	_ALIGN(p)
+
+#define	PAGE_SHIFT	12
+#define	PAGE_SIZE	(1 << PAGE_SHIFT)	/* Page size */
+#define	PAGE_MASK	(PAGE_SIZE - 1)
+#define	NPTEPG		(PAGE_SIZE/(sizeof (pt_entry_t)))
+
+#define	KERNBASE	0x100000	/* start of kernel virtual */
+#define	BTOPKERNBASE	((u_long)KERNBASE >> PGSHIFT)
+
+#define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
+#define	DEV_BSIZE	(1 << DEV_BSHIFT)
+
+#ifndef BLKDEV_IOSIZE
+#define	BLKDEV_IOSIZE	PAGE_SIZE	/* default block device I/O size */
+#endif
+#define	DFLTPHYS	(64 * 1024)	/* default max raw I/O transfer size */
+#define	MAXPHYS		(128 * 1024)	/* max raw I/O transfer size */
+#define	MAXDUMPPGS	(DFLTPHYS/PAGE_SIZE)
+
+#define	UPAGES		2		/* pages of u-area */
+#define	USPACE		(UPAGES * PAGE_SIZE)	/* total size of u-area */
+
+/*
+ * Constants related to network buffer management.
+ * MCLBYTES must be no larger than PAGE_SIZE.
+ */
+#ifndef	MSIZE
+#define	MSIZE		256		/* size of an mbuf */
+#endif	/* MSIZE */
+
+#ifndef	MCLSHIFT
+#define	MCLSHIFT	11		/* convert bytes to mbuf clusters */
+#endif	/* MCLSHIFT */
+#define	MCLBYTES	(1 << MCLSHIFT)	/* size of an mbuf cluster */
+
+/*
+ * Some macros for units conversion
+ */
+
+/* pages ("clicks") to bytes */
+#define	ctob(x)		((x) << PAGE_SHIFT)
+
+/* bytes to clicks */
+#define	btoc(x)		(((unsigned)(x) + PAGE_MASK) >> PAGE_SHIFT)
+
+/* pages ("clicks") to disk blocks */
+#define	ctod(x)		((x) << (PAGE_SHIFT - DEV_BSHIFT))
+#define	dtoc(x)		((x) >> (PAGE_SHIFT - DEV_BSHIFT))
+
+/* bytes to disk blocks */
+/*
+ * btodb() is messy and perhaps slow because `bytes' may be an off_t.  We
+ * want to shift an unsigned type to avoid sign extension and we don't
+ * want to widen `bytes' unnecessarily.  Assume that the result fits in
+ * a daddr_t.
+ */
+#define	btodb(bytes)	 		/* calculates (bytes / DEV_BSIZE) */ \
+	(sizeof (bytes) > sizeof(long) \
+	 ? (daddr_t)((unsigned long long)(bytes) >> DEV_BSHIFT) \
+	 : (daddr_t)((unsigned long)(bytes) >> DEV_BSHIFT))
+
+#define	dbtob(db)			/* calculates (db * DEV_BSIZE) */ \
+	((off_t)(db) << DEV_BSHIFT)
+
+/*
+ * Mach derived conversion macros
+ */
+#define	trunc_page(x)		((x) & ~PAGE_MASK)
+#define	round_page(x)		(((x) + PAGE_MASK) & ~PAGE_MASK)
+#define	trunc_4mpage(x)		((unsigned)(x) & ~PDRMASK)
+#define	round_4mpage(x)		((((unsigned)(x)) + PDRMASK) & ~PDRMASK)
+
+#define	atop(x)			((unsigned)(x) >> PAGE_SHIFT)
+#define	ptoa(x)			((unsigned)(x) << PAGE_SHIFT)
+
+#define	powerpc_btop(x)		((unsigned)(x) >> PAGE_SHIFT)
+#define	powerpc_ptob(x)		((unsigned)(x) << PAGE_SHIFT)
+
+#define	pgtok(x)		((x) * (PAGE_SIZE / 1024))
+
+#endif /* !_MACHINE_PARAM_H_ */
+#endif /* !_NO_NAMESPACE_POLLUTION */