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 * $FreeBSD$ 39 */ 40 41 /* 42 * Machine dependent constants for PowerPC (32-bit only currently) 43 */ 44 45 /* 46 * Round p (pointer or byte index) up to a correctly-aligned value 47 * for all data types (int, long, ...). The result is unsigned int 48 * and must be cast to any desired pointer type. 49 */ 50 #ifndef _ALIGNBYTES 51 #define _ALIGNBYTES (sizeof(int) - 1) 52 #endif 53 #ifndef _ALIGN 54 #define _ALIGN(p) (((unsigned)(p) + _ALIGNBYTES) & ~_ALIGNBYTES) 55 #endif 56 57 #ifndef _NO_NAMESPACE_POLLUTION 58 59 #ifndef _MACHINE_PARAM_H_ 60 #define _MACHINE_PARAM_H_ 61 62 #ifndef MACHINE 63 #define MACHINE "powerpc" 64 #endif 65 #ifndef MACHINE_ARCH 66 #define MACHINE_ARCH "powerpc" 67 #endif 68 #define MID_MACHINE MID_POWERPC 69 70 #ifdef SMP 71 #define MAXCPU 2 72 #else 73 #define MAXCPU 1 74 #endif /* SMP */ 75 76 #define ALIGNBYTES _ALIGNBYTES 77 #define ALIGN(p) _ALIGN(p) 78 79 #define PAGE_SHIFT 12 80 #define PAGE_SIZE (1 << PAGE_SHIFT) /* Page size */ 81 #define PAGE_MASK (PAGE_SIZE - 1) 82 #define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 83 84 #ifndef KSTACK_PAGES 85 #define KSTACK_PAGES 4 /* includes pcb */ 86 #endif 87 #define KSTACK_GUARD_PAGES 1 /* pages of kstack guard; 0 disables */ 88 #define USPACE (KSTACK_PAGES * PAGE_SIZE) /* total size of pcb */ 89 90 /* 91 * Mach derived conversion macros 92 */ 93 #define trunc_page(x) ((unsigned long)(x) & ~(PAGE_MASK)) 94 #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 95 #define trunc_4mpage(x) ((unsigned)(x) & ~PDRMASK) 96 #define round_4mpage(x) ((((unsigned)(x)) + PDRMASK) & ~PDRMASK) 97 98 #define atop(x) ((unsigned long)(x) >> PAGE_SHIFT) 99 #define ptoa(x) ((unsigned long)(x) << PAGE_SHIFT) 100 101 #define powerpc_btop(x) ((unsigned)(x) >> PAGE_SHIFT) 102 #define powerpc_ptob(x) ((unsigned)(x) << PAGE_SHIFT) 103 104 #define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 105 106 #endif /* !_MACHINE_PARAM_H_ */ 107 #endif /* !_NO_NAMESPACE_POLLUTION */ 108