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Diffstat (limited to 'sys/powerpc/include')
-rw-r--r-- | sys/powerpc/include/param.h | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/sys/powerpc/include/param.h b/sys/powerpc/include/param.h new file mode 100644 index 0000000..ebc67b7 --- /dev/null +++ b/sys/powerpc/include/param.h @@ -0,0 +1,175 @@ +/*- + * 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 */ |