f27c8b35e2
now it uses a very dumb first-touch allocation policy. This will change in the future. - Each architecture indicates the maximum number of supported memory domains via a new VM_NDOMAIN parameter in <machine/vmparam.h>. - Each cpu now has a PCPU_GET(domain) member to indicate the memory domain a CPU belongs to. Domain values are dense and numbered from 0. - When a platform supports multiple domains, the default freelist (VM_FREELIST_DEFAULT) is split up into N freelists, one for each domain. The MD code is required to populate an array of mem_affinity structures. Each entry in the array defines a range of memory (start and end) and a domain for the range. Multiple entries may be present for a single domain. The list is terminated by an entry where all fields are zero. This array of structures is used to split up phys_avail[] regions that fall in VM_FREELIST_DEFAULT into per-domain freelists. - Each memory domain has a separate lookup-array of freelists that is used when fulfulling a physical memory allocation. Right now the per-domain freelists are listed in a round-robin order for each domain. In the future a table such as the ACPI SLIT table may be used to order the per-domain lookup lists based on the penalty for each memory domain relative to a specific domain. The lookup lists may be examined via a new vm.phys.lookup_lists sysctl. - The first-touch policy is implemented by using PCPU_GET(domain) to pick a lookup list when allocating memory. Reviewed by: alc
155 lines
4.4 KiB
C
155 lines
4.4 KiB
C
/* $NetBSD: vmparam.h,v 1.26 2003/08/07 16:27:47 agc Exp $ */
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/*-
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* Copyright (c) 1988 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_VMPARAM_H_
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#define _MACHINE_VMPARAM_H_
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/*#include <arm/arm32/vmparam.h>
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*/
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/*
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* Address space constants
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*/
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/*
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* The line between user space and kernel space
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* Mappings >= KERNEL_BASE are constant across all processes
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*/
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#define KERNBASE 0xc0000000
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/*
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* max number of non-contig chunks of physical RAM you can have
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*/
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#define VM_PHYSSEG_MAX 32
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/*
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* The physical address space is densely populated.
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*/
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#define VM_PHYSSEG_DENSE
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/*
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* Create three free page pools: VM_FREEPOOL_DEFAULT is the default pool
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* from which physical pages are allocated and VM_FREEPOOL_DIRECT is
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* the pool from which physical pages for small UMA objects are
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* allocated.
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*/
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#define VM_NFREEPOOL 3
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#define VM_FREEPOOL_CACHE 2
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#define VM_FREEPOOL_DEFAULT 0
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#define VM_FREEPOOL_DIRECT 1
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/*
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* we support 2 free lists:
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*
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* - DEFAULT for all systems
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* - ISADMA for the ISA DMA range on Sharks only
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*/
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#define VM_NFREELIST 2
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#define VM_FREELIST_DEFAULT 0
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#define VM_FREELIST_ISADMA 1
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/*
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* The largest allocation size is 1MB.
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*/
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#define VM_NFREEORDER 9
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/*
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* Only one memory domain.
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*/
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#ifndef VM_NDOMAIN
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#define VM_NDOMAIN 1
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#endif
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/*
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* Disable superpage reservations.
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*/
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#ifndef VM_NRESERVLEVEL
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#define VM_NRESERVLEVEL 0
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#endif
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#define UPT_MAX_ADDRESS VADDR(UPTPTDI + 3, 0)
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#define UPT_MIN_ADDRESS VADDR(UPTPTDI, 0)
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#define VM_MIN_ADDRESS (0x00001000)
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#ifdef ARM_USE_SMALL_ALLOC
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/*
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* ARM_KERN_DIRECTMAP is used to make sure there's enough space between
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* VM_MAXUSER_ADDRESS and KERNBASE to map the whole memory.
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* It has to be a compile-time constant, even if arm_init_smallalloc(),
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* which will do the mapping, gets the real amount of memory at runtime,
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* because VM_MAXUSER_ADDRESS is a constant.
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*/
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#ifndef ARM_KERN_DIRECTMAP
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#define ARM_KERN_DIRECTMAP 512 * 1024 * 1024 /* 512 MB */
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#endif
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#define VM_MAXUSER_ADDRESS KERNBASE - ARM_KERN_DIRECTMAP
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#else /* ARM_USE_SMALL_ALLOC */
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#define VM_MAXUSER_ADDRESS KERNBASE
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#endif /* ARM_USE_SMALL_ALLOC */
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#define VM_MAX_ADDRESS VM_MAXUSER_ADDRESS
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#define USRSTACK VM_MAXUSER_ADDRESS
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/* initial pagein size of beginning of executable file */
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#ifndef VM_INITIAL_PAGEIN
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#define VM_INITIAL_PAGEIN 16
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#endif
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#ifndef VM_MIN_KERNEL_ADDRESS
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#define VM_MIN_KERNEL_ADDRESS KERNBASE
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#endif
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#define VM_MAX_KERNEL_ADDRESS 0xffffffff
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/*
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* Virtual size (bytes) for various kernel submaps.
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*/
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#ifndef VM_KMEM_SIZE
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#define VM_KMEM_SIZE (12*1024*1024)
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#endif
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#define MAXTSIZ (16*1024*1024)
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#define DFLDSIZ (128*1024*1024)
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#define MAXDSIZ (512*1024*1024)
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#define DFLSSIZ (2*1024*1024)
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#define MAXSSIZ (8*1024*1024)
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#define SGROWSIZ (128*1024)
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#define MAXSLP 20
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#ifdef ARM_USE_SMALL_ALLOC
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#define UMA_MD_SMALL_ALLOC
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#endif /* ARM_USE_SMALL_ALLOC */
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#endif /* _MACHINE_VMPARAM_H_ */
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