d86b2422b9
code can use it. This takes a single constant argument and fails to compile if it is 0 (false). The main application of this is to make assertions about structure sizes at compile time, in order to validate assumptions made in other code. Examples: CTASSERT(sizeof(struct foo) == FOO_SIZEOF); CTASSERT(sizeof(struct foo) == (1 << FOO_SHIFT)); Requested by: jhb, phk
181 lines
5.2 KiB
C
181 lines
5.2 KiB
C
/*-
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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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*
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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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* from: @(#)param.h 5.8 (Berkeley) 6/28/91
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* $FreeBSD$
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*/
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/*
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* Machine dependent constants for sparc64.
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*/
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#define TODO \
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panic("implement %s", __func__)
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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 unsigned int
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* and must be cast to any desired pointer type.
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*/
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#ifndef _ALIGNBYTES
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#define _ALIGNBYTES 0xf
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#endif
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#ifndef _ALIGN
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#define _ALIGN(p) (((u_long)(p) + _ALIGNBYTES) & ~_ALIGNBYTES)
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#endif
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#ifndef _MACHINE
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#define _MACHINE sparc64
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#endif
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#ifndef _MACHINE_ARCH
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#define _MACHINE_ARCH sparc64
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#endif
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#ifndef _NO_NAMESPACE_POLLUTION
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#ifndef _MACHINE_PARAM_H_
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#define _MACHINE_PARAM_H_
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#ifndef MACHINE
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#define MACHINE "sparc64"
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#endif
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#ifndef MACHINE_ARCH
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#define MACHINE_ARCH "sparc64"
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#endif
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#define MID_MACHINE MID_SPARC64
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/*
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* OBJFORMAT_NAMES is a comma-separated list of the object formats
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* that are supported on the architecture.
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*/
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#define OBJFORMAT_NAMES "elf"
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#define OBJFORMAT_DEFAULT "elf"
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#ifdef SMP
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#define MAXCPU 16
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#else
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#define MAXCPU 1
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#endif /* SMP */
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#define INT_SHIFT 2
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#define PTR_SHIFT 3
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#define ALIGNBYTES _ALIGNBYTES
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#define ALIGN(p) _ALIGN(p)
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#define PAGE_SHIFT_8K 13
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#define PAGE_SIZE_8K (1UL<<PAGE_SHIFT_8K)
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#define PAGE_MASK_8K (PAGE_SIZE_8K-1)
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#define PAGE_SHIFT_64K 16
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#define PAGE_SIZE_64K (1UL<<PAGE_SHIFT_64K)
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#define PAGE_MASK_64K (PAGE_SIZE_64K-1)
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#define PAGE_SHIFT_512K 19
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#define PAGE_SIZE_512K (1UL<<PAGE_SHIFT_512K)
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#define PAGE_MASK_512K (PAGE_SIZE_512K-1)
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#define PAGE_SHIFT_4M 22
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#define PAGE_SIZE_4M (1UL<<PAGE_SHIFT_4M)
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#define PAGE_MASK_4M (PAGE_SIZE_4M-1)
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#define PAGE_SHIFT_MIN PAGE_SHIFT_8K
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#define PAGE_SIZE_MIN PAGE_SIZE_8K
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#define PAGE_MASK_MIN PAGE_MASK_8K
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#define PAGE_SHIFT PAGE_SHIFT_8K /* LOG2(PAGE_SIZE) */
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#define PAGE_SIZE PAGE_SIZE_8K /* bytes/page */
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#define PAGE_MASK PAGE_MASK_8K
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#define PAGE_SHIFT_MAX PAGE_SHIFT_4M
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#define PAGE_SIZE_MAX PAGE_SIZE_4M
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#define PAGE_MASK_MAX PAGE_MASK_4M
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#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
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#define DEV_BSIZE (1<<DEV_BSHIFT)
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#ifndef BLKDEV_IOSIZE
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#define BLKDEV_IOSIZE PAGE_SIZE /* default block device I/O size */
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#endif
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#define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */
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#define MAXPHYS (128 * 1024) /* max raw I/O transfer size */
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#define MAXDUMPPGS (DFLTPHYS/PAGE_SIZE)
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#define KSTACK_PAGES 4 /* pages of kernel stack (with pcb) */
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#define UAREA_PAGES 1 /* pages of user area */
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#define PCPU_PAGES 1
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#define KSTACK_GUARD /* compile in kstack guard page */
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#define KSTACK_GUARD_PAGES 1
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/*
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* Constants related to network buffer management.
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* MCLBYTES must be no larger than PAGE_SIZE.
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*/
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#ifndef MSIZE
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#define MSIZE 256 /* size of an mbuf */
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#endif /* MSIZE */
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#ifndef MCLSHIFT
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#define MCLSHIFT 11 /* convert bytes to mbuf clusters */
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#endif /* MCLSHIFT */
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#define MCLBYTES (1 << MCLSHIFT) /* size of an mbuf cluster */
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/*
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* Some macros for units conversion
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*/
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/* clicks to bytes */
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#define ctob(x) ((unsigned long)(x)<<PAGE_SHIFT)
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/* bytes to clicks */
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#define btoc(x) (((unsigned long)(x)+PAGE_MASK)>>PAGE_SHIFT)
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/* bytes to disk blocks */
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#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
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(daddr_t)((unsigned long)(bytes) >> DEV_BSHIFT)
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/* disk blocks to bytes */
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#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
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(off_t)((unsigned long)(db) << DEV_BSHIFT)
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/*
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* Mach derived conversion macros
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*/
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#define round_page(x) (((unsigned long)(x) + PAGE_MASK) & ~PAGE_MASK)
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#define trunc_page(x) ((unsigned long)(x) & ~PAGE_MASK)
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#define atop(x) ((unsigned long)(x) >> PAGE_SHIFT)
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#define ptoa(x) ((unsigned long)(x) << PAGE_SHIFT)
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#define sparc64_btop(x) ((unsigned long)(x) >> PAGE_SHIFT)
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#define sparc64_ptob(x) ((unsigned long)(x) << PAGE_SHIFT)
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#define pgtok(x) ((unsigned long)(x) * (PAGE_SIZE / 1024))
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#endif /* !_MACHINE_PARAM_H_ */
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#endif /* !_NO_NAMESPACE_POLLUTION */
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