/*- * 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: src/sys/powerpc/include/param.h,v 1.1 2001/01/02 00:06:45 obrien Exp $ */ /* * 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 #if !defined(LOCORE) #include #endif /* * 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 long)(x) >> PAGE_SHIFT) #define ptoa(x) ((unsigned long)(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)) /* XXX: NetBSD defines that we're using for the moment */ #define USER_SR 13 #define KERNEL_SR 14 #define KERNEL_SEGMENT (0xfffff0 + KERNEL_SR) #define EMPTY_SEGMENT 0xfffff0 #define USER_ADDR ((void *)(USER_SR << ADDR_SR_SHFT)) #define SEGMENT_LENGTH 0x10000000 #define SEGMENT_MASK 0xf0000000 #if !defined(NPMAPS) #define NPMAPS 32768 #endif /* !defined(NPMAPS) */ #if !defined(MSGBUFSIZE) #define MSGBUFSIZE PAGE_SIZE #endif /* !defined(MSGBUFSIZE) */ /* * XXX: Stop NetBSD msgbuf_paddr code from happening. */ #define MSGBUFADDR #endif /* !_MACHINE_PARAM_H_ */ #endif /* !_NO_NAMESPACE_POLLUTION */