214 lines
6.9 KiB
C
214 lines
6.9 KiB
C
/*-
|
|
* Copyright (c) 1990 The Regents of the University of California.
|
|
* All rights reserved.
|
|
* Copyright (c) 1994 John S. Dyson
|
|
* All rights reserved.
|
|
* Copyright (c) 2003 Peter Wemm
|
|
* 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
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
|
|
#ifndef _MACHINE_VMPARAM_H_
|
|
#define _MACHINE_VMPARAM_H_ 1
|
|
|
|
/*
|
|
* Machine dependent constants for AMD64.
|
|
*/
|
|
|
|
/*
|
|
* 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 (32768UL*1024*1024) /* max data size */
|
|
#endif
|
|
#ifndef DFLSSIZ
|
|
#define DFLSSIZ (8UL*1024*1024) /* initial stack size limit */
|
|
#endif
|
|
#ifndef MAXSSIZ
|
|
#define MAXSSIZ (512UL*1024*1024) /* max stack size */
|
|
#endif
|
|
#ifndef SGROWSIZ
|
|
#define SGROWSIZ (128UL*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
|
|
|
|
/*
|
|
* We provide a machine specific single page allocator through the use
|
|
* of the direct mapped segment. This uses 2MB pages for reduced
|
|
* TLB pressure.
|
|
*/
|
|
#define UMA_MD_SMALL_ALLOC
|
|
|
|
/*
|
|
* 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 31
|
|
|
|
/*
|
|
* Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool
|
|
* from which physical pages are allocated and VM_FREEPOOL_DIRECT is
|
|
* the pool from which physical pages for page tables and small UMA
|
|
* objects are allocated.
|
|
*/
|
|
#define VM_NFREEPOOL 3
|
|
#define VM_FREEPOOL_CACHE 2
|
|
#define VM_FREEPOOL_DEFAULT 0
|
|
#define VM_FREEPOOL_DIRECT 1
|
|
|
|
/*
|
|
* 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
|
|
|
|
/*
|
|
* An allocation size of 16MB is supported in order to optimize the
|
|
* use of the direct map by UMA. Specifically, a cache line contains
|
|
* at most 8 PDEs, collectively mapping 16MB of physical memory. By
|
|
* reducing the number of distinct 16MB "pages" that are used by UMA,
|
|
* the physical memory allocator reduces the likelihood of both 2MB
|
|
* page TLB misses and cache misses caused by 2MB page TLB misses.
|
|
*/
|
|
#define VM_NFREEORDER 13
|
|
|
|
/*
|
|
* Enable superpage reservations: 1 level.
|
|
*/
|
|
#ifndef VM_NRESERVLEVEL
|
|
#define VM_NRESERVLEVEL 1
|
|
#endif
|
|
|
|
/*
|
|
* Level 0 reservations consist of 512 pages.
|
|
*/
|
|
#ifndef VM_LEVEL_0_ORDER
|
|
#define VM_LEVEL_0_ORDER 9
|
|
#endif
|
|
|
|
/*
|
|
* Virtual addresses of things. Derived from the page directory and
|
|
* page table indexes from pmap.h for precision.
|
|
*
|
|
* 0x0000000000000000 - 0x00007fffffffffff user map
|
|
* 0x0000800000000000 - 0xffff7fffffffffff does not exist (hole)
|
|
* 0xffff800000000000 - 0xffff804020100fff recursive page table (512GB slot)
|
|
* 0xffff804020101000 - 0xfffffeffffffffff unused
|
|
* 0xffffff0000000000 - 0xffffff7fffffffff 512GB direct map mappings
|
|
* 0xffffff8000000000 - 0xffffffffffffffff 512GB kernel map
|
|
*
|
|
* Within the kernel map:
|
|
*
|
|
* 0xffffffff80000000 KERNBASE
|
|
*/
|
|
|
|
#define VM_MAX_KERNEL_ADDRESS KVADDR(KPML4I, NPDPEPG-1, NPDEPG-1, NPTEPG-1)
|
|
#define VM_MIN_KERNEL_ADDRESS KVADDR(KPML4I, NPDPEPG-512, 0, 0)
|
|
|
|
#define DMAP_MIN_ADDRESS KVADDR(DMPML4I, 0, 0, 0)
|
|
#define DMAP_MAX_ADDRESS KVADDR(DMPML4I+1, 0, 0, 0)
|
|
|
|
#define KERNBASE KVADDR(KPML4I, KPDPI, 0, 0)
|
|
|
|
#define UPT_MAX_ADDRESS KVADDR(PML4PML4I, PML4PML4I, PML4PML4I, PML4PML4I)
|
|
#define UPT_MIN_ADDRESS KVADDR(PML4PML4I, 0, 0, 0)
|
|
|
|
#define VM_MAXUSER_ADDRESS UVADDR(NUPML4E, 0, 0, 0)
|
|
|
|
#define USRSTACK VM_MAXUSER_ADDRESS
|
|
|
|
#define VM_MAX_ADDRESS UPT_MAX_ADDRESS
|
|
#define VM_MIN_ADDRESS (0)
|
|
|
|
#define PHYS_TO_DMAP(x) ((x) | DMAP_MIN_ADDRESS)
|
|
#define DMAP_TO_PHYS(x) ((x) & ~DMAP_MIN_ADDRESS)
|
|
|
|
/* 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 amount of kmem_map kva space.
|
|
*/
|
|
#ifndef VM_KMEM_SIZE_MAX
|
|
#define VM_KMEM_SIZE_MAX ((VM_MAX_KERNEL_ADDRESS - \
|
|
VM_MIN_KERNEL_ADDRESS + 1) * 3 / 5)
|
|
#endif
|
|
|
|
/* initial pagein size of beginning of executable file */
|
|
#ifndef VM_INITIAL_PAGEIN
|
|
#define VM_INITIAL_PAGEIN 16
|
|
#endif
|
|
|
|
#endif /* _MACHINE_VMPARAM_H_ */
|