freebsd-dev/sys/sparc64/include/vmparam.h
Jake Burkholder d73b19ef9d Use a fixed address for KERNBASE, so it doesn't change if the size of KVA
is increased.  Its confusing for all the kernel addresses to change, and
doesn't serve much purpose as far as conserving address space.
2002-07-13 03:29:10 +00:00

153 lines
5.4 KiB
C

/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 1994 John S. Dyson
* 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.
*
* from: @(#)vmparam.h 5.9 (Berkeley) 5/12/91
* from: FreeBSD: src/sys/i386/include/vmparam.h,v 1.33 2000/03/30
* $FreeBSD$
*/
#ifndef _MACHINE_VMPARAM_H_
#define _MACHINE_VMPARAM_H_
/*
* Virtual memory related constants, all in bytes
*/
#ifndef MAXTSIZ
#define MAXTSIZ (1*1024*1024*1024) /* max text size */
#endif
#ifndef DFLDSIZ
#define DFLDSIZ (128*1024*1024) /* initial data size limit */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ (1*1024*1024*1024) /* max data size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (128*1024*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ (1*1024*1024*1024) /* max stack size */
#endif
#ifndef SGROWSIZ
#define SGROWSIZ (128*1024) /* amount to grow stack */
#endif
/*
* The time for a process to be blocked before being very swappable.
* This is a number of seconds which the system takes as being a non-trivial
* amount of real time. You probably shouldn't change this;
* it is used in subtle ways (fractions and multiples of it are, that is, like
* half of a ``long time'', almost a long time, etc.)
* It is related to human patience and other factors which don't really
* change over time.
*/
#define MAXSLP 20
/*
* Highest user address. Also address of initial user stack. This is
* arbitrary, neither the structure or size of the user page table (tsb)
* nor the location or size of the kernel virtual address space have any
* bearing on what we use for user addresses. We want something relatively
* high to give a large address space, but we also have to take the out of
* range va hole into account. So we pick an address just before the start
* of the hole, which gives a user address space of just under 8TB. Note
* that if this moves above the va hole, we will have to deal with sign
* extension of virtual addresses.
*/
#define VM_MAXUSER_ADDRESS ((vm_offset_t)0x7fe00000000)
#define VM_MIN_ADDRESS ((vm_offset_t)0)
#define VM_MAX_ADDRESS (VM_MAXUSER_ADDRESS)
/*
* Initial user stack address for 64 bit processes. Should be highest user
* virtual address.
*/
#define USRSTACK VM_MAXUSER_ADDRESS
/*
* Virtual size (bytes) for various kernel submaps.
*/
#ifndef VM_KMEM_SIZE
#define VM_KMEM_SIZE (16*1024*1024)
#endif
/*
* How many physical pages per KVA page allocated.
* min(max(VM_KMEM_SIZE, Physical memory/VM_KMEM_SIZE_SCALE), VM_KMEM_SIZE_MAX)
* is the total KVA space allocated for kmem_map.
*/
#ifndef VM_KMEM_SIZE_SCALE
#define VM_KMEM_SIZE_SCALE (3)
#endif
/*
* Number of 4 meg pages to use for the kernel tsb.
*/
#ifndef KVA_PAGES
#define KVA_PAGES (1)
#endif
/*
* Range of kernel virtual addresses. max = min + range.
*/
#define KVA_RANGE \
((KVA_PAGES * PAGE_SIZE_4M) << (PAGE_SHIFT - TTE_SHIFT))
/*
* Lowest kernel virtual address, where the kernel is loaded. This is also
* arbitrary. We pick a resonably low address, which allows all of kernel
* text, data and bss to be below the 4 gigabyte mark, yet still high enough
* to cover the prom addresses with 1 tsb page. This also happens to be the
* same as for x86 with default KVA_PAGES...
*/
#define VM_MIN_KERNEL_ADDRESS (0xc0000000)
#define VM_MAX_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + KVA_RANGE - PAGE_SIZE)
#define KERNBASE (VM_MIN_KERNEL_ADDRESS)
#define VM_MIN_PROM_ADDRESS (0xf0000000)
#define VM_MAX_PROM_ADDRESS (0xffffe000)
/*
* Initial pagein size of beginning of executable file.
*/
#ifndef VM_INITIAL_PAGEIN
#define VM_INITIAL_PAGEIN 16
#endif
#endif /* !_MACHINE_VMPARAM_H_ */