/* * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This 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, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* Copyright (c) 1993,1995 NeXT Computer, Inc. All Rights Reserved */ #ifndef _PPC_PARAM_H_ #define _PPC_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 3 #define ALIGN(p) (((unsigned int)(p) + ALIGNBYTES) &~ ALIGNBYTES) #define NBPG 4096 /* bytes/page */ #define PGOFSET (NBPG-1) /* byte offset into page */ #define PGSHIFT 12 /* LOG2(NBPG) */ #define NBSEG 0x40000000 /* bytes/segment (quadrant) */ #define SEGOFSET (NBSEG-1) /* byte offset into segment */ #define SEGSHIFT 30 /* LOG2(NBSEG) */ #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 STACK_GROWTH_UP 0 /* stack grows to lower addresses */ #define CLSIZE 1 #define CLSIZELOG2 0 #define STACKSIZE 4 /* pages in kernel stack */ #define UPAGES 0 /* total pages in u-area */ /* red zone is beyond this */ /* * 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 MSIZE 256 /* size of an mbuf */ #define MCLBYTES 2048 /* large enough for ether MTU */ #define MCLSHIFT 11 #define MCLOFSET (MCLBYTES - 1) #ifndef NMBCLUSTERS #if GATEWAY #define NMBCLUSTERS ((1024 * 1024) / MCLBYTES) /* cl map size: 1MB */ #else #define NMBCLUSTERS ((1024 * 1024) / MCLBYTES) /* cl map size was 0.5MB when MSIZE was 128, now it's 1MB*/ #endif #endif /* pages ("clicks") (NBPG bytes) to disk blocks */ #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT)) #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT)) #define dtob(x) ((x)<<DEV_BSHIFT) /* pages to bytes */ #define ctob(x) ((x)<<PGSHIFT) /* bytes to pages */ #define btoc(x) (((unsigned)(x)+(PGOFSET))>>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 should use the bsize * field from the disk label. * For now though just use DEV_BSIZE. */ #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) /* from machdep/ppc/proc_reg.h */ #ifdef __BIG_ENDIAN__ #define ENDIAN_MASK(val,size) (1 << (size-1 - val)) #else #error code not ported to little endian targets yet #endif /* __BIG_ENDIAN__ */ #ifndef MASK #define MASK(PART) ENDIAN_MASK(PART ## _BIT, 32) #endif #define MSR_EE_BIT 16 #define MSR_PR_BIT 17 #define USERMODE(msr) (msr & MASK(MSR_PR) ? TRUE : FALSE) #define BASEPRI(msr) (msr & MASK(MSR_EE) ? TRUE : FALSE) /* end of from proc_reg.h */ #if defined(KERNEL) || defined(STANDALONE) #define DELAY(n) delay(n) #else #define DELAY(n) { register int N = (n); while (--N > 0); } #endif /* defined(KERNEL) || defined(STANDALONE) */ #define NPIDS 16 /* maximum number of PIDs per process */ #define NIOPIDS 8 /* maximum number of IO space PIDs */ #endif /* _PPC_PARAM_H_ */