freebsd-dev/sys/i386/include/param.h

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/*-
* 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
* $Id: param.h,v 1.17 1995/01/23 19:21:49 davidg Exp $
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*/
#ifndef _MACHINE_PARAM_H_
#define _MACHINE_PARAM_H_
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/*
* Machine dependent constants for Intel 386.
*/
#define MACHINE "i386"
#define MID_MACHINE MID_I386
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/*
* 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.
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*/
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#define ALIGNBYTES (sizeof(int) - 1)
#define ALIGN(p) (((unsigned)(p) + ALIGNBYTES) & ~ALIGNBYTES)
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/* XXX PGSHIFT and PG_SHIFT are two names for the same thing */
#define PGSHIFT 12 /* LOG2(NBPG) */
#define PAGE_SHIFT 12
#define NBPG (1 << PAGE_SHIFT) /* bytes/page */
#define PAGE_SIZE (1 << PAGE_SHIFT)
#define PAGE_MASK (PAGE_SIZE-1)
#define PGOFSET (NBPG-1) /* byte offset into page */
#define NPTEPG (NBPG/(sizeof (pt_entry_t)))
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/* XXX PDRSHIFT and PD_SHIFT are two names for the same thing */
#define PDRSHIFT 22 /* LOG2(NBPDR) */
Fix definitions to be in terms of a minimum number of constants by using the SHIFT value as the basis for the other values, for example instead of: #define NBPG 4096 #define PGSHIFT 12 use: #define PGSHIFT 12 #define NBPG (1 << PGSHIFT) =================================================================== RCS file: /a/cvs/386BSD/src/sys/i386/include/param.h,v retrieving revision 1.3 diff -c -r1.3 param.h *** 1.3 1993/10/08 12:49:55 --- param.h 1993/10/08 12:53:19 *************** *** 52,76 **** #define ALIGNBYTES (sizeof(int) - 1) #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) - #define NBPG 4096 /* bytes/page */ - #define PGOFSET (NBPG-1) /* byte offset into page */ #define PGSHIFT 12 /* LOG2(NBPG) */ #define NPTEPG (NBPG/(sizeof (struct pte))) - #define NBPDR (1024*NBPG) /* bytes/page dir */ - #define PDROFSET (NBPDR-1) /* byte offset into page dir */ #define PDRSHIFT 22 /* LOG2(NBPDR) */ #define KERNBASE 0xFE000000 /* start of kernel virtual */ #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) ! #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 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ #define SSIZE 1 /* initial stack size/NBPG */ --- 52,79 ---- #define ALIGNBYTES (sizeof(int) - 1) #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) #define PGSHIFT 12 /* LOG2(NBPG) */ + #define NBPG (1 << PGSHIFT) /* bytes/page */ + #define PGOFSET (NBPG-1) /* byte offset into page */ #define NPTEPG (NBPG/(sizeof (struct pte))) #define PDRSHIFT 22 /* LOG2(NBPDR) */ + #define NBPDR (1 << PDRSHIFT) /* bytes/page dir */ + #define PDROFSET (NBPDR-1) /* byte offset into page dir */ #define KERNBASE 0xFE000000 /* start of kernel virtual */ #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) ! #define KERNSIZE 0x00C00000 /* size of kernel virtual */ ! #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ + #define DEV_BSIZE (1 << DEV_BSHIFT) + #define BLKDEV_IOSIZE 2048 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ #define CLSIZELOG2 0 + #define CLSIZE (1 << CLSIZELOG2) /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ #define SSIZE 1 /* initial stack size/NBPG */ *************** *** 92,99 **** #ifndef MCLSHIFT #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ #endif /* MCLSHIFT */ ! #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ ! #define MCLOFSET (MCLBYTES - 1) /* offset within a m_buf cluster */ #ifndef NMBCLUSTERS #ifdef GATEWAY --- 95,102 ---- #ifndef MCLSHIFT #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ #endif /* MCLSHIFT */ ! #define MCLBYTES (1 << MCLSHIFT) /* size of an m_buf cluster */ ! #define MCLOFSET (MCLBYTES - 1) /* offset within an m_buf cluster */ #ifndef NMBCLUSTERS #ifdef GATEWAY
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#define NBPDR (1 << PDRSHIFT) /* bytes/page dir */
#define PDROFSET (NBPDR-1) /* byte offset into page dir */
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/*
* XXX This should really be KPTDPTDI << PDRSHIFT, but since KPTDPTDI is
* defined in pmap.h which is included after this we can't do that
* (YET!)
*/
#define BTOPKERNBASE (KERNBASE >> PGSHIFT)
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#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
#define DEV_BSIZE (1 << DEV_BSHIFT)
Fix definitions to be in terms of a minimum number of constants by using the SHIFT value as the basis for the other values, for example instead of: #define NBPG 4096 #define PGSHIFT 12 use: #define PGSHIFT 12 #define NBPG (1 << PGSHIFT) =================================================================== RCS file: /a/cvs/386BSD/src/sys/i386/include/param.h,v retrieving revision 1.3 diff -c -r1.3 param.h *** 1.3 1993/10/08 12:49:55 --- param.h 1993/10/08 12:53:19 *************** *** 52,76 **** #define ALIGNBYTES (sizeof(int) - 1) #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) - #define NBPG 4096 /* bytes/page */ - #define PGOFSET (NBPG-1) /* byte offset into page */ #define PGSHIFT 12 /* LOG2(NBPG) */ #define NPTEPG (NBPG/(sizeof (struct pte))) - #define NBPDR (1024*NBPG) /* bytes/page dir */ - #define PDROFSET (NBPDR-1) /* byte offset into page dir */ #define PDRSHIFT 22 /* LOG2(NBPDR) */ #define KERNBASE 0xFE000000 /* start of kernel virtual */ #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) ! #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 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ #define SSIZE 1 /* initial stack size/NBPG */ --- 52,79 ---- #define ALIGNBYTES (sizeof(int) - 1) #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) #define PGSHIFT 12 /* LOG2(NBPG) */ + #define NBPG (1 << PGSHIFT) /* bytes/page */ + #define PGOFSET (NBPG-1) /* byte offset into page */ #define NPTEPG (NBPG/(sizeof (struct pte))) #define PDRSHIFT 22 /* LOG2(NBPDR) */ + #define NBPDR (1 << PDRSHIFT) /* bytes/page dir */ + #define PDROFSET (NBPDR-1) /* byte offset into page dir */ #define KERNBASE 0xFE000000 /* start of kernel virtual */ #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) ! #define KERNSIZE 0x00C00000 /* size of kernel virtual */ ! #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ + #define DEV_BSIZE (1 << DEV_BSHIFT) + #define BLKDEV_IOSIZE 2048 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ #define CLSIZELOG2 0 + #define CLSIZE (1 << CLSIZELOG2) /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ #define SSIZE 1 /* initial stack size/NBPG */ *************** *** 92,99 **** #ifndef MCLSHIFT #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ #endif /* MCLSHIFT */ ! #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ ! #define MCLOFSET (MCLBYTES - 1) /* offset within a m_buf cluster */ #ifndef NMBCLUSTERS #ifdef GATEWAY --- 95,102 ---- #ifndef MCLSHIFT #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ #endif /* MCLSHIFT */ ! #define MCLBYTES (1 << MCLSHIFT) /* size of an m_buf cluster */ ! #define MCLOFSET (MCLBYTES - 1) /* offset within an m_buf cluster */ #ifndef NMBCLUSTERS #ifdef GATEWAY
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#define BLKDEV_IOSIZE 2048
#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
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#define CLSIZELOG2 0
#define CLSIZE (1 << CLSIZELOG2)
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/* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */
#define SSIZE 1 /* initial stack size/NBPG */
#define SINCR 1 /* increment of stack/NBPG */
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#define UPAGES 2 /* pages of u-area */
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/*
* 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.
*/
#ifndef MSIZE
#define MSIZE 128 /* size of an mbuf */
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#endif /* MSIZE */
#ifndef MCLSHIFT
#define MCLSHIFT 11 /* convert bytes to m_buf clusters */
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#endif /* MCLSHIFT */
#define MCLBYTES (1 << MCLSHIFT) /* size of an m_buf cluster */
#define MCLOFSET (MCLBYTES - 1) /* offset within an m_buf cluster */
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#ifndef NMBCLUSTERS
#ifdef GATEWAY
#define NMBCLUSTERS 512 /* map size, max cluster allocation */
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#else
#define NMBCLUSTERS 256 /* map size, max cluster allocation */
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#endif /* GATEWAY */
#endif /* NMBCLUSTERS */
/*
* Some macros for units conversion
*/
/* Core clicks (4096 bytes) to segments and vice versa */
#define ctos(x) (x)
#define stoc(x) (x)
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/* 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)
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/* clicks to bytes */
#define ctob(x) ((x)<<PGSHIFT)
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/* bytes to clicks */
#define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT)
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/*
* This is messy and perhaps slow because `bytes' may be an off_t. We
* have to shift an unsigned type to avoid sign extension and we don't
* want to widen `bytes' unnecessarily. Assume that off_t is long long
* and daddr_t is unsigned long.
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*/
#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
(sizeof (bytes) > sizeof(long) \
? (unsigned long)((unsigned long long)(bytes) >> DEV_BSHIFT) \
: (unsigned long)((unsigned long)(bytes) >> DEV_BSHIFT))
#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
((unsigned long long)(db) << DEV_BSHIFT)
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/*
* Mach derived conversion macros
*/
#define trunc_page(x) ((unsigned)(x) & ~(NBPG-1))
#define round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
#define atop(x) ((unsigned)(x) >> PG_SHIFT)
#define ptoa(x) ((unsigned)(x) << PG_SHIFT)
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#define i386_round_pdr(x) ((((unsigned)(x)) + NBPDR - 1) & ~(NBPDR-1))
#define i386_trunc_pdr(x) ((unsigned)(x) & ~(NBPDR-1))
#define i386_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
#define i386_trunc_page(x) ((unsigned)(x) & ~(NBPG-1))
#define i386_btod(x) ((unsigned)(x) >> PDRSHIFT)
#define i386_dtob(x) ((unsigned)(x) << PDRSHIFT)
#define i386_btop(x) ((unsigned)(x) >> PGSHIFT)
#define i386_ptob(x) ((unsigned)(x) << PGSHIFT)
#endif /* !_MACHINE_PARAM_H_ */