param.h revision 196994
1/*- 2 * Copyright (c) 2001 David E. O'Brien 3 * Copyright (c) 1990 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * William Jolitz. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: @(#)param.h 5.8 (Berkeley) 6/28/91 38 * $FreeBSD: head/sys/powerpc/include/param.h 196994 2009-09-08 20:45:40Z phk $ 39 */ 40 41#ifndef _POWERPC_INCLUDE_PARAM_H_ 42#define _POWERPC_INCLUDE_PARAM_H_ 43 44/* 45 * Machine dependent constants for PowerPC (32-bit only currently) 46 */ 47 48#include <machine/_align.h> 49 50/* Needed to display interrupts on OFW PCI */ 51#define __PCI_REROUTE_INTERRUPT 52 53#ifndef MACHINE 54#define MACHINE "powerpc" 55#endif 56#ifndef MACHINE_ARCH 57#define MACHINE_ARCH "powerpc" 58#endif 59#define MID_MACHINE MID_POWERPC 60 61#if defined(SMP) || defined(KLD_MODULE) 62#define MAXCPU 2 63#else 64#define MAXCPU 1 65#endif /* SMP || KLD_MODULE */ 66 67#define ALIGNBYTES _ALIGNBYTES 68#define ALIGN(p) _ALIGN(p) 69/* 70 * ALIGNED_POINTER is a boolean macro that checks whether an address 71 * is valid to fetch data elements of type t from on this architecture. 72 * This does not reflect the optimal alignment, just the possibility 73 * (within reasonable limits). 74 */ 75#define ALIGNED_POINTER(p, t) ((((unsigned)(p)) & (sizeof (t) - 1)) == 0) 76 77/* 78 * CACHE_LINE_SIZE is the compile-time maximum cache line size for an 79 * architecture. It should be used with appropriate caution. 80 */ 81#define CACHE_LINE_SHIFT 7 82#define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT) 83 84#define PAGE_SHIFT 12 85#define PAGE_SIZE (1 << PAGE_SHIFT) /* Page size */ 86#define PAGE_MASK (PAGE_SIZE - 1) 87#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 88 89#ifndef KSTACK_PAGES 90#define KSTACK_PAGES 4 /* includes pcb */ 91#endif 92#define KSTACK_GUARD_PAGES 1 /* pages of kstack guard; 0 disables */ 93#define USPACE (KSTACK_PAGES * PAGE_SIZE) /* total size of pcb */ 94 95/* 96 * Mach derived conversion macros 97 */ 98#define trunc_page(x) ((unsigned long)(x) & ~(PAGE_MASK)) 99#define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 100#define trunc_4mpage(x) ((unsigned)(x) & ~PDRMASK) 101#define round_4mpage(x) ((((unsigned)(x)) + PDRMASK) & ~PDRMASK) 102 103#define atop(x) ((unsigned long)(x) >> PAGE_SHIFT) 104#define ptoa(x) ((unsigned long)(x) << PAGE_SHIFT) 105 106#define powerpc_btop(x) ((unsigned)(x) >> PAGE_SHIFT) 107#define powerpc_ptob(x) ((unsigned)(x) << PAGE_SHIFT) 108 109#define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 110 111#endif /* !_POWERPC_INCLUDE_PARAM_H_ */ 112