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freebsd-nq/sys/powerpc/include/vmparam.h
Alan Cox c70af4875e As of r257209, all architectures have defined VM_KMEM_SIZE_SCALE. In other 
words, every architecture is now auto-sizing the kmem arena.  This revision
changes kmeminit() so that the definition of VM_KMEM_SIZE_SCALE becomes
mandatory and the definition of VM_KMEM_SIZE becomes optional.

Replace or eliminate all existing definitions of VM_KMEM_SIZE.  With
auto-sizing enabled, VM_KMEM_SIZE effectively became an alternate spelling
for VM_KMEM_SIZE_MIN on most architectures.  Use VM_KMEM_SIZE_MIN for
clarity.

Change kmeminit() so that the effect of defining VM_KMEM_SIZE is similar to
that of setting the tunable vm.kmem_size.  Whereas the macros
VM_KMEM_SIZE_{MAX,MIN,SCALE} have had the same effect as the tunables
vm.kmem_size_{max,min,scale}, the effects of VM_KMEM_SIZE and vm.kmem_size
have been distinct.  In particular, whereas VM_KMEM_SIZE was overridden by
VM_KMEM_SIZE_{MAX,MIN,SCALE} and vm.kmem_size_{max,min,scale}, vm.kmem_size
was not.  Remedy this inconsistency.  Now, VM_KMEM_SIZE can be used to set
the size of the kmem arena at compile-time without that value being
overridden by auto-sizing.

Update the nearby comments to reflect the kmem submap being replaced by the
kmem arena.  Stop duplicating the auto-sizing formula in every machine-
dependent vmparam.h and place it in kmeminit() where auto-sizing takes
place.

Reviewed by:	kib (an earlier version)
Sponsored by:	EMC / Isilon Storage Division
2013-11-08 16:25:00 +00:00

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/*-
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
* Copyright (C) 1995, 1996 TooLs GmbH.
* All rights reserved.
*
* 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 TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
*
* $NetBSD: vmparam.h,v 1.11 2000/02/11 19:25:16 thorpej Exp $
* $FreeBSD$
*/
#ifndef _MACHINE_VMPARAM_H_
#define _MACHINE_VMPARAM_H_
#define USRSTACK SHAREDPAGE
#ifndef MAXTSIZ
#define MAXTSIZ (64*1024*1024) /* max text size */
#endif
#ifndef DFLDSIZ
#define DFLDSIZ (128*1024*1024) /* default data size */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ (1*1024*1024*1024) /* max data size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (8*1024*1024) /* default stack size */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ (64*1024*1024) /* max stack size */
#endif
#ifdef AIM
#define VM_MAXUSER_ADDRESS32 ((vm_offset_t)0xfffff000)
#else
#define VM_MAXUSER_ADDRESS32 ((vm_offset_t)0x7ffff000)
#endif
/*
* Would like to have MAX addresses = 0, but this doesn't (currently) work
*/
#if !defined(LOCORE)
#ifdef __powerpc64__
#define VM_MIN_ADDRESS (0x0000000000000000UL)
#define VM_MAXUSER_ADDRESS (0xfffffffffffff000UL)
#define VM_MAX_ADDRESS (0xffffffffffffffffUL)
#else
#define VM_MIN_ADDRESS ((vm_offset_t)0)
#define VM_MAXUSER_ADDRESS VM_MAXUSER_ADDRESS32
#define VM_MAX_ADDRESS ((vm_offset_t)0xffffffff)
#endif
#define SHAREDPAGE (VM_MAXUSER_ADDRESS - PAGE_SIZE)
#else /* LOCORE */
#if !defined(__powerpc64__) && defined(BOOKE)
#define VM_MIN_ADDRESS 0
#define VM_MAXUSER_ADDRESS 0x7ffff000
#endif
#endif /* LOCORE */
#define FREEBSD32_SHAREDPAGE (VM_MAXUSER_ADDRESS32 - PAGE_SIZE)
#define FREEBSD32_USRSTACK FREEBSD32_SHAREDPAGE
#ifdef AIM
#define KERNBASE 0x00100000UL /* start of kernel virtual */
#ifdef __powerpc64__
#define VM_MIN_KERNEL_ADDRESS 0xc000000000000000UL
#define VM_MAX_KERNEL_ADDRESS 0xc0000001c7ffffffUL
#define VM_MAX_SAFE_KERNEL_ADDRESS VM_MAX_KERNEL_ADDRESS
#else
#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)KERNEL_SR << ADDR_SR_SHFT)
#define VM_MAX_SAFE_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + 2*SEGMENT_LENGTH -1)
#define VM_MAX_KERNEL_ADDRESS (VM_MIN_KERNEL_ADDRESS + 3*SEGMENT_LENGTH - 1)
#endif
/*
* Use the direct-mapped BAT registers for UMA small allocs. This
* takes pressure off the small amount of available KVA.
*/
#define UMA_MD_SMALL_ALLOC
#else /* Book-E */
#define KERNBASE 0xc0000000 /* start of kernel virtual */
#define VM_MIN_KERNEL_ADDRESS KERNBASE
#define VM_MAX_KERNEL_ADDRESS 0xf8000000
#define VM_MAX_SAFE_KERNEL_ADDRESS VM_MAX_KERNEL_ADDRESS
#endif /* AIM/E500 */
#if !defined(LOCORE)
struct pmap_physseg {
struct pv_entry *pvent;
char *attrs;
};
#endif
#define VM_PHYSSEG_MAX 16 /* 1? */
/*
* The physical address space is densely populated on 32-bit systems,
* but may not be on 64-bit ones.
*/
#ifdef __powerpc64__
#define VM_PHYSSEG_SPARSE
#else
#define VM_PHYSSEG_DENSE
#endif
/*
* 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 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 one free page list.
*/
#define VM_NFREELIST 1
#define VM_FREELIST_DEFAULT 0
/*
* The largest allocation size is 4MB.
*/
#define VM_NFREEORDER 11
/*
* Disable superpage reservations.
*/
#ifndef VM_NRESERVLEVEL
#define VM_NRESERVLEVEL 0
#endif
#ifndef VM_INITIAL_PAGEIN
#define VM_INITIAL_PAGEIN 16
#endif
#ifndef SGROWSIZ
#define SGROWSIZ (128UL*1024) /* amount to grow stack */
#endif
/*
* How many physical pages per kmem arena virtual page.
*/
#ifndef VM_KMEM_SIZE_SCALE
#define VM_KMEM_SIZE_SCALE (3)
#endif
/*
* Optional floor (in bytes) on the size of the kmem arena.
*/
#ifndef VM_KMEM_SIZE_MIN
#define VM_KMEM_SIZE_MIN (12 * 1024 * 1024)
#endif
/*
* Optional ceiling (in bytes) on the size of the kmem arena: 40% of the
* usable KVA space.
*/
#ifndef VM_KMEM_SIZE_MAX
#define VM_KMEM_SIZE_MAX ((VM_MAX_SAFE_KERNEL_ADDRESS - \
VM_MIN_KERNEL_ADDRESS + 1) * 2 / 5)
#endif
#define ZERO_REGION_SIZE (64 * 1024) /* 64KB */
#endif /* _MACHINE_VMPARAM_H_ */
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