d621e29eca
on the amount of physical memory and limited by NMBCLUSTERS if present. Architectures without direct mapping also limit it based on the kmem_map size, which is used as backing store. On i386 and ARM, the maximum KVA used for mbuf clusters is limited to 64MB by default. The old default limits and limits based on GATEWAY have been removed. key_registered_sb_max is hard-wired to a value derived from 2048 clusters.
177 lines
6.5 KiB
C
177 lines
6.5 KiB
C
/* $NetBSD: param.h,v 1.67 2010/02/08 19:02:31 joerg Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1992, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This software was developed by the Computer Systems Engineering group
|
|
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
|
|
* contributed to Berkeley.
|
|
*
|
|
* 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, Lawrence Berkeley Laboratory.
|
|
*
|
|
* 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. 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 8.1 (Berkeley) 6/11/93
|
|
*/
|
|
/*
|
|
* Sun4M support by Aaron Brown, Harvard University.
|
|
* Changes Copyright (c) 1995 The President and Fellows of Harvard College.
|
|
* All rights reserved.
|
|
*/
|
|
#define _MACHINE sparc
|
|
#define MACHINE "sparc"
|
|
#define _MACHINE_ARCH sparc
|
|
#define MACHINE_ARCH "sparc"
|
|
#define MID_MACHINE MID_SPARC
|
|
|
|
#include <machine/cpuconf.h> /* XXX */
|
|
#ifdef _KERNEL /* XXX */
|
|
#ifndef _LOCORE /* XXX */
|
|
#include <machine/cpu.h> /* XXX */
|
|
#endif /* XXX */
|
|
#endif /* XXX */
|
|
|
|
/*
|
|
* Round p (pointer or byte index) up to a correctly-aligned value for
|
|
* the machine's strictest data type. 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 7
|
|
#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES)
|
|
#define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0)
|
|
|
|
#define SUN4_PGSHIFT 13 /* for a sun4 machine */
|
|
#define SUN4CM_PGSHIFT 12 /* for a sun4c or sun4m machine */
|
|
|
|
/*
|
|
* The following variables are always defined and initialized (in locore)
|
|
* so independently compiled modules (e.g. LKMs) can be used irrespective
|
|
* of the `options SUN4?' combination a particular kernel was configured with.
|
|
* See also the definitions of NBPG, PGOFSET and PGSHIFT below.
|
|
*/
|
|
#if (defined(_KERNEL) || defined(_STANDALONE)) && !defined(_LOCORE)
|
|
extern int nbpg, pgofset, pgshift;
|
|
#endif
|
|
|
|
#if !(defined(PROM_AT_F0) || defined(MSIIEP))
|
|
#define KERNBASE 0xf0000000 /* start of kernel virtual space */
|
|
#else
|
|
/*
|
|
* JS1/OF has prom sitting in f000.0000..f007.ffff, modify kernel VA
|
|
* layout to work around that. XXX - kernel should live beyound prom on
|
|
* those machines.
|
|
*/
|
|
#define KERNBASE 0xe8000000
|
|
#endif
|
|
#define KERNEND 0xfe000000 /* end of kernel virtual space */
|
|
/* Arbitrarily only use 1/4 of the kernel address space for buffers. */
|
|
#define VM_MAX_KERNEL_BUF ((KERNEND - KERNBASE)/4)
|
|
#define PROM_LOADADDR 0x00004000 /* where the prom loads us */
|
|
#define KERNTEXTOFF (KERNBASE+PROM_LOADADDR)/* start of kernel text */
|
|
|
|
#define DEV_BSIZE 512
|
|
#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
|
|
#define BLKDEV_IOSIZE 2048
|
|
#define MAXPHYS (64 * 1024)
|
|
|
|
#define SSIZE 1 /* initial stack size in pages */
|
|
#define USPACE 8192
|
|
|
|
/*
|
|
* Constants related to network buffer management.
|
|
* MCLBYTES must be no larger than NBPG (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 */
|
|
/* 2K cluster can hold Ether frame */
|
|
#endif /* MCLSHIFT */
|
|
|
|
#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */
|
|
|
|
/*
|
|
* 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 ((32 * 1024 * 1024) >> PAGE_SHIFT)
|
|
|
|
#if defined(_KERNEL) || defined(_STANDALONE)
|
|
#ifndef _LOCORE
|
|
extern void delay(unsigned int);
|
|
#define DELAY(n) delay(n)
|
|
#endif /* _LOCORE */
|
|
|
|
/*
|
|
* microSPARC-IIep is a sun4m but with an integrated PCI controller.
|
|
* In a lot of places (like pmap &c) we want it to be treated as SUN4M.
|
|
* But since various low-level things are done very differently from
|
|
* normal sparcs (and since for now it requires a relocated kernel
|
|
* anyway), the MSIIEP kernels are not supposed to support any other
|
|
* system. So insist on SUN4M defined and SUN4 and SUN4C not defined.
|
|
*/
|
|
#if defined(MSIIEP)
|
|
#if defined(SUN4) || defined(SUN4C) || defined(SUN4D)
|
|
#error "microSPARC-IIep kernels cannot support sun4, sun4c, or sun4d"
|
|
#endif
|
|
#if !defined(SUN4M)
|
|
#error "microSPARC-IIep kernel must have 'options SUN4M'"
|
|
#endif
|
|
#endif /* MSIIEP */
|
|
|
|
/*
|
|
* Sun4 machines have a page size of 8192. All other machines have a page
|
|
* size of 4096. Short cut page size variables if we can.
|
|
*/
|
|
#if CPU_NTYPES != 0 && !defined(SUN4)
|
|
# define NBPG 4096
|
|
# define PGOFSET (NBPG-1)
|
|
# define PGSHIFT SUN4CM_PGSHIFT
|
|
#elif CPU_NTYPES == 1 && defined(SUN4)
|
|
# define NBPG 8192
|
|
# define PGOFSET (NBPG-1)
|
|
# define PGSHIFT SUN4_PGSHIFT
|
|
#else
|
|
# define NBPG nbpg
|
|
# define PGOFSET pgofset
|
|
# define PGSHIFT pgshift
|
|
#endif
|
|
|
|
#endif /* _KERNEL || _STANDALONE */
|