X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/d7e50217d7adf6e52786a38bcaa4cd698cb9a79e..cb3231590a3c94ab4375e2228bd5e86b0cf1ad7e:/bsd/i386/param.h?ds=sidebyside diff --git a/bsd/i386/param.h b/bsd/i386/param.h index 084e9f30f..bff89a516 100644 --- a/bsd/i386/param.h +++ b/bsd/i386/param.h @@ -1,17 +1,20 @@ /* - * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2010 Apple Inc. All rights reserved. + * + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * - * @APPLE_LICENSE_HEADER_START@ - * - * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. - * * 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. Please obtain a copy of the License at - * http://www.opensource.apple.com/apsl/ and read it before using this - * file. - * + * 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, @@ -19,8 +22,8 @@ * 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_HEADER_END@ + * + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /*- * Copyright (c) 1990, 1993 @@ -69,27 +72,27 @@ #ifndef _I386_PARAM_H_ #define _I386_PARAM_H_ +#include + /* * Round p (pointer or byte index) up to a correctly-aligned value for all - * data types (int, long, ...). The result is u_int and must be cast to - * any desired pointer type. + * data types (int, long, ...). The result is unsigned int and must be + * cast to any desired pointer type. */ -#define ALIGNBYTES 3 -#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 ALIGNBYTES __DARWIN_ALIGNBYTES +#define ALIGN(p) __DARWIN_ALIGN(p) -#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 NBPG 4096 /* bytes/page */ +#define PGOFSET (NBPG-1) /* byte offset into page */ +#define PGSHIFT 12 /* LOG2(NBPG) */ -#define STACK_GROWS_UP 0 /* stack grows to lower addresses */ +#define DEV_BSIZE 512 +#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ +#define BLKDEV_IOSIZE 2048 +#define MAXPHYS (128 * 1024) /* max raw I/O transfer size */ -#define CLSIZE 1 -#define CLSIZELOG2 0 +#define CLSIZE 1 +#define CLSIZELOG2 0 /* * Constants related to network buffer management. @@ -98,45 +101,47 @@ * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple * of the hardware page size. */ -#define MSIZE 256 /* size of an mbuf */ -#define MCLBYTES 2048 /* large enough for ether MTU */ -#define MCLSHIFT 11 -#define MCLOFSET (MCLBYTES - 1) +#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 -#ifdef GATEWAY -#define NMBCLUSTERS ((1024 * 1024) / MCLBYTES) /* cl map size: 1MB */ -#else -#define NMBCLUSTERS ((1024 * 512) / MCLBYTES) /* cl map size: 0.5MB */ -#endif +#define NMBCLUSTERS ((1024 * 1024) / MCLBYTES) /* cl map size: 1MB */ #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) +#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)<>(PGSHIFT-DEV_BSHIFT)) +#define dtob(x) ((x)<>PGSHIFT) +#define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT) #ifdef __APPLE__ #define btodb(bytes, devBlockSize) \ - ((unsigned)(bytes) / devBlockSize) + ((unsigned)(bytes) / devBlockSize) #define dbtob(db, devBlockSize) \ - ((unsigned)(db) * devBlockSize) + ((unsigned)(db) * devBlockSize) #else -#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ +#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ ((unsigned)(bytes) >> DEV_BSHIFT) -#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ +#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ ((unsigned)(db) << DEV_BSHIFT) #endif @@ -146,21 +151,21 @@ * add an entry to cdevsw/bdevsw for that purpose. * For now though just use DEV_BSIZE. */ -#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/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) +#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) +#if defined(KERNEL) || defined(STANDALONE) +#define DELAY(n) delay(n) -#else /* defined(KERNEL) || defined(STANDALONE) */ -#define DELAY(n) { register int N = (n); while (--N > 0); } -#endif /* defined(KERNEL) || defined(STANDALONE) */ +#else /* defined(KERNEL) || defined(STANDALONE) */ +#define DELAY(n) { int N = (n); while (--N > 0); } +#endif /* defined(KERNEL) || defined(STANDALONE) */ #endif /* _I386_PARAM_H_ */