210 lines
5.9 KiB
C
210 lines
5.9 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.
|
|
* 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
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
|
|
#ifndef _MACHINE_VMPARAM_H_
|
|
#define _MACHINE_VMPARAM_H_ 1
|
|
|
|
/*
|
|
* Machine dependent constants for 386.
|
|
*/
|
|
|
|
/*
|
|
* Virtual memory related constants, all in bytes
|
|
*/
|
|
#define MAXTSIZ (128UL*1024*1024) /* max text size */
|
|
#ifndef DFLDSIZ
|
|
#define DFLDSIZ (128UL*1024*1024) /* initial data size limit */
|
|
#endif
|
|
#ifndef MAXDSIZ
|
|
#define MAXDSIZ (512UL*1024*1024) /* max data size */
|
|
#endif
|
|
#ifndef DFLSSIZ
|
|
#define DFLSSIZ (8UL*1024*1024) /* initial stack size limit */
|
|
#endif
|
|
#ifndef MAXSSIZ
|
|
#define MAXSSIZ (64UL*1024*1024) /* max stack size */
|
|
#endif
|
|
#ifndef SGROWSIZ
|
|
#define SGROWSIZ (128UL*1024) /* amount to grow stack */
|
|
#endif
|
|
|
|
/*
|
|
* The physical address space is densely populated.
|
|
*/
|
|
#define VM_PHYSSEG_DENSE
|
|
|
|
/*
|
|
* The number of PHYSSEG entries must be one greater than the number
|
|
* of phys_avail entries because the phys_avail entry that spans the
|
|
* largest physical address that is accessible by ISA DMA is split
|
|
* into two PHYSSEG entries.
|
|
*/
|
|
#define VM_PHYSSEG_MAX 17
|
|
|
|
/*
|
|
* Create two free page pools. Since the i386 kernel virtual address
|
|
* space does not include a mapping onto the machine's entire physical
|
|
* memory, VM_FREEPOOL_DIRECT is defined as an alias for the default
|
|
* pool, VM_FREEPOOL_DEFAULT.
|
|
*/
|
|
#define VM_NFREEPOOL 2
|
|
#define VM_FREEPOOL_CACHE 1
|
|
#define VM_FREEPOOL_DEFAULT 0
|
|
#define VM_FREEPOOL_DIRECT 0
|
|
|
|
/*
|
|
* Create two free page lists: VM_FREELIST_DEFAULT is for physical
|
|
* pages that are above the largest physical address that is
|
|
* accessible by ISA DMA and VM_FREELIST_ISADMA is for physical pages
|
|
* that are below that address.
|
|
*/
|
|
#define VM_NFREELIST 2
|
|
#define VM_FREELIST_DEFAULT 0
|
|
#define VM_FREELIST_ISADMA 1
|
|
|
|
/*
|
|
* The largest allocation size is 2MB under PAE and 4MB otherwise.
|
|
*/
|
|
#ifdef PAE
|
|
#define VM_NFREEORDER 10
|
|
#else
|
|
#define VM_NFREEORDER 11
|
|
#endif
|
|
|
|
/*
|
|
* Only one memory domain.
|
|
*/
|
|
#ifndef VM_NDOMAIN
|
|
#define VM_NDOMAIN 1
|
|
#endif
|
|
|
|
/*
|
|
* Enable superpage reservations: 1 level.
|
|
*/
|
|
#ifndef VM_NRESERVLEVEL
|
|
#define VM_NRESERVLEVEL 1
|
|
#endif
|
|
|
|
/*
|
|
* Level 0 reservations consist of 512 pages under PAE and 1024 pages
|
|
* otherwise.
|
|
*/
|
|
#ifndef VM_LEVEL_0_ORDER
|
|
#ifdef PAE
|
|
#define VM_LEVEL_0_ORDER 9
|
|
#else
|
|
#define VM_LEVEL_0_ORDER 10
|
|
#endif
|
|
#endif
|
|
|
|
/*
|
|
* Kernel physical load address.
|
|
*/
|
|
#ifndef KERNLOAD
|
|
#if defined(XEN) && !defined(XEN_PRIVILEGED_GUEST)
|
|
#define KERNLOAD 0
|
|
#else
|
|
#define KERNLOAD (1 << PDRSHIFT)
|
|
#endif
|
|
#endif /* !defined(KERNLOAD) */
|
|
|
|
/*
|
|
* Virtual addresses of things. Derived from the page directory and
|
|
* page table indexes from pmap.h for precision.
|
|
* Because of the page that is both a PD and PT, it looks a little
|
|
* messy at times, but hey, we'll do anything to save a page :-)
|
|
*/
|
|
|
|
#ifdef XEN
|
|
#define VM_MAX_KERNEL_ADDRESS HYPERVISOR_VIRT_START
|
|
#else
|
|
#define VM_MAX_KERNEL_ADDRESS VADDR(KPTDI+NKPDE-1, NPTEPG-1)
|
|
#endif
|
|
|
|
#define VM_MIN_KERNEL_ADDRESS VADDR(PTDPTDI, PTDPTDI)
|
|
|
|
#define KERNBASE VADDR(KPTDI, 0)
|
|
|
|
#define UPT_MAX_ADDRESS VADDR(PTDPTDI, PTDPTDI)
|
|
#define UPT_MIN_ADDRESS VADDR(PTDPTDI, 0)
|
|
|
|
#define VM_MAXUSER_ADDRESS VADDR(PTDPTDI, 0)
|
|
|
|
#define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE)
|
|
#define USRSTACK SHAREDPAGE
|
|
|
|
#define VM_MAX_ADDRESS VADDR(PTDPTDI, PTDPTDI)
|
|
#define VM_MIN_ADDRESS ((vm_offset_t)0)
|
|
|
|
/* virtual sizes (bytes) for various kernel submaps */
|
|
#ifndef VM_KMEM_SIZE
|
|
#define VM_KMEM_SIZE (12 * 1024 * 1024)
|
|
#endif
|
|
|
|
/*
|
|
* How many physical pages per KVA page allocated.
|
|
* min(max(max(VM_KMEM_SIZE, Physical memory/VM_KMEM_SIZE_SCALE),
|
|
* VM_KMEM_SIZE_MIN), 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
|
|
|
|
/*
|
|
* Ceiling on the amount of kmem_map KVA space: 40% of the entire KVA space
|
|
* rounded to the nearest multiple of the superpage size.
|
|
*/
|
|
#ifndef VM_KMEM_SIZE_MAX
|
|
#define VM_KMEM_SIZE_MAX (((((VM_MAX_KERNEL_ADDRESS - \
|
|
VM_MIN_KERNEL_ADDRESS) >> (PDRSHIFT - 2)) + 5) / 10) << PDRSHIFT)
|
|
#endif
|
|
|
|
/* initial pagein size of beginning of executable file */
|
|
#ifndef VM_INITIAL_PAGEIN
|
|
#define VM_INITIAL_PAGEIN 16
|
|
#endif
|
|
|
|
#define ZERO_REGION_SIZE (64 * 1024) /* 64KB */
|
|
|
|
#ifndef VM_MAX_AUTOTUNE_MAXUSERS
|
|
#define VM_MAX_AUTOTUNE_MAXUSERS 384
|
|
#endif
|
|
|
|
#endif /* _MACHINE_VMPARAM_H_ */
|