5c00743626
Based on work by Vivek Prakash and Gianluca Guida. See UPDATING about caveats on currently existing accounts. . restores netbsd libc pwcache functions
92 lines
3.4 KiB
C
92 lines
3.4 KiB
C
/* $NetBSD: param.h,v 1.72 2010/02/08 19:02:29 joerg Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)param.h 5.8 (Berkeley) 6/28/91
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*/
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#ifndef _I386_PARAM_H_
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#define _I386_PARAM_H_
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/*
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* Machine dependent constants for Intel 386.
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*/
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/*
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* Round p (pointer or byte index) up to a correctly-aligned value
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* for all data types (int, long, ...). The result is u_int and
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* must be cast to any desired pointer type.
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*
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* ALIGNED_POINTER is a boolean macro that checks whether an address
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* is valid to fetch data elements of type t from on this architecture.
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* This does not reflect the optimal alignment, just the possibility
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* (within reasonable limits).
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*
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*/
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#define ALIGNBYTES (sizeof(int) - 1)
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#define ALIGN(p) (((u_int)(u_long)(p) + ALIGNBYTES) &~ \
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ALIGNBYTES)
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#define ALIGNED_POINTER(p,t) 1
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#define PGSHIFT 12 /* LOG2(NBPG) */
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#define NBPG (1 << PGSHIFT) /* bytes/page */
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#define PGOFSET (NBPG-1) /* byte offset into page */
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#define NPTEPG (NBPG/(sizeof (pt_entry_t)))
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#ifndef MAXPHYS
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#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
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#endif
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/*
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* Mach derived conversion macros
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*/
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#define x86_round_pdr(x) \
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((((unsigned long)(x)) + (NBPD_L2 - 1)) & ~(NBPD_L2 - 1))
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#define x86_trunc_pdr(x) ((unsigned long)(x) & ~(NBPD_L2 - 1))
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#define x86_btod(x) ((unsigned long)(x) >> L2_SHIFT)
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#define x86_dtob(x) ((unsigned long)(x) << L2_SHIFT)
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#define x86_round_page(x) ((((paddr_t)(x)) + PGOFSET) & ~PGOFSET)
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#define x86_trunc_page(x) ((paddr_t)(x) & ~PGOFSET)
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#define x86_btop(x) ((paddr_t)(x) >> PGSHIFT)
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#define x86_ptob(x) ((paddr_t)(x) << PGSHIFT)
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#ifdef __minix
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/* Minix expect to find in this file PAGE_* defines. */
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#include <machine/vmparam.h>
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#define trunc_page(x) x86_trunc_page(x)
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#define round_page(x) x86_round_page(x)
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#endif
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#endif /* _I386_PARAM_H_ */
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