NetBSD/sys/arch/evbsh3/include/param.h

189 lines
6.3 KiB
C

/* $NetBSD: param.h,v 1.7 2001/01/04 07:03:23 itojun Exp $ */
/*-
* 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.
*
* @(#)param.h 5.8 (Berkeley) 6/28/91
*/
/*
* Machine dependent constants for Intel 386.
*/
#ifndef _EVBSH3_PARAM_H_
#define _EVBSH3_PARAM_H_
#ifdef _KERNEL
#ifdef _LOCORE
#include <machine/psl.h>
#else
#include <machine/cpu.h>
#endif
#endif
/* XXX relying upon gcc symbol here... */
#ifdef __LITTLE_ENDIAN__
#define _MACHINE_ARCH sh3el
#define MACHINE_ARCH "sh3el"
#else
#define _MACHINE_ARCH sh3eb
#define MACHINE_ARCH "sh3eb"
#endif
#define _MACHINE evbsh3
#define MACHINE "evbsh3"
#define MID_MACHINE MID_SH3
/*
* Round p (pointer or byte index) up to a correctly-aligned value
* for all data types (int, long, ...). The result is u_int and
* must be cast to any desired pointer type.
*
* ALIGNED_POINTER is a boolean macro that checks whether an address
* is valid to fetch data elements of type t from on this architecture.
* This does not reflect the optimal alignment, just the possibility
* (within reasonable limits).
*
*/
#define ALIGNBYTES (sizeof(int) - 1)
#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
#define ALIGNED_POINTER(p, t) ((((u_long)(p)) & (sizeof(t)-1)) == 0)
/* #define ALIGNED_POINTER(p, t) 1 */
#define PGSHIFT 12 /* LOG2(NBPG) */
#define NBPG (1 << PGSHIFT) /* bytes/page */
#define PGOFSET (NBPG-1) /* byte offset into page */
#define NPTEPG (NBPG/(sizeof (pt_entry_t)))
#ifdef _KERNEL
#ifndef _LOCORE
extern vaddr_t ram_start;
#define KERNBASE ram_start /* start of kernel virtual space */
#define KERNTEXTOFF ram_start /* start of kernel text */
#else
#define KERNBASE IOM_RAM_BEGIN /* start of kernel virtual space */
#define KERNTEXTOFF IOM_RAM_BEGIN /* start of kernel text */
#endif
#endif
#define KERNSIZE 0x01800000 /* size of kernel virtual space */
#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT)
#define NPGDIR (1*NBPG)
#define SYSMAP (5*NBPG) /* page table area offset from _end */
#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
#define DEV_BSIZE (1 << DEV_BSHIFT)
#define BLKDEV_IOSIZE 2048
#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
#define SSIZE 1 /* initial stack size/NBPG */
#define SINCR 1 /* increment of stack/NBPG */
#if 0
#define UPAGES 2 /* pages of u-area */
#else
#define UPAGES 4 /* pages of u-area */
#endif
#define USPACE (UPAGES * NBPG) /* total size of u-area */
#ifndef MSGBUFSIZE
#define MSGBUFSIZE NBPG /* default message buffer size */
#endif
/*
* Constants related to network buffer management.
* MCLBYTES must be no larger than CLBYTES (the software page size), and,
* on machines that exchange pages of input or output buffers with mbuf
* clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
* of the hardware page size.
*/
#define MSIZE 256 /* size of an mbuf */
#ifndef MCLSHIFT
# define MCLSHIFT 11 /* convert bytes to m_buf clusters */
#endif /* MCLSHIFT */
#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */
#define MCLOFSET (MCLBYTES - 1) /* offset within a m_buf cluster */
#ifndef NMBCLUSTERS
#ifdef GATEWAY
#define NMBCLUSTERS 512 /* map size, max cluster allocation */
#else
#define NMBCLUSTERS 256 /* map size, max cluster allocation */
#endif
#endif
/*
* Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
* logical pages.
*/
#define NKMEMPAGES_MIN_DEFAULT ((6 * 1024 * 1024) >> PAGE_SHIFT)
#define NKMEMPAGES_MAX_DEFAULT ((6 * 1024 * 1024) >> PAGE_SHIFT)
/* pages ("clicks") to disk blocks */
#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
/* bytes to pages */
#define ctob(x) ((x) << PGSHIFT)
#define btoc(x) (((x) + PGOFSET) >> PGSHIFT)
/* bytes to disk blocks */
#define dbtob(x) ((x) << DEV_BSHIFT)
#define btodb(x) ((x) >> DEV_BSHIFT)
/*
* Map a ``block device block'' to a file system block.
* This should be device dependent, and should use the bsize
* field from the disk label.
* For now though just use DEV_BSIZE.
*/
#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE / DEV_BSIZE))
/*
* Mach derived conversion macros
*/
#define sh3_round_pdr(x) ((((unsigned)(x)) + PDOFSET) & ~PDOFSET)
#define sh3_trunc_pdr(x) ((unsigned)(x) & ~PDOFSET)
#define sh3_btod(x) ((unsigned)(x) >> PDSHIFT)
#define sh3_dtob(x) ((unsigned)(x) << PDSHIFT)
#define sh3_round_page(x) ((((unsigned)(x)) + PGOFSET) & ~PGOFSET)
#define sh3_trunc_page(x) ((unsigned)(x) & ~PGOFSET)
#define sh3_btop(x) ((unsigned)(x) >> PGSHIFT)
#define sh3_ptob(x) ((unsigned)(x) << PGSHIFT)
#endif /* _EVBSH3_PARAM_H_ */