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- /*
- * Copyright (c) 2000 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 */
- /*
- * The NEXTSTEP Software License Agreement specifies the terms
- * and conditions for redistribution.
- *
- */
-
- #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 u_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 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 (USIZE+STACKSIZE) /* 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 */
- #if __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_ */
-