NetBSD/sys/arch/acorn32/include/vmparam.h

130 lines
4.1 KiB
C

/* $NetBSD: vmparam.h,v 1.11 2002/09/14 15:54:00 thorpej Exp $ */
/*
* Copyright (c) 1988 The Regents of the University of California.
* 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 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.
*/
#ifndef _ARM32_VMPARAM_H_
#define _ARM32_VMPARAM_H_
#ifdef _KERNEL
#include <arm/arm32/vmparam.h>
/*
* Address space constants
*/
/*
* The line between user space and kernel space
* Mappings >= KERNEL_BASE are constant across all processes
*/
#define KERNEL_BASE 0xf0000000
/* Various constants used by the MD code*/
#define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00000000)
#define APTE_BASE (KERNEL_BASE + 0x00c00000)
#define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000)
/*
* The Kernel VM Size varies depending on the machine depending on how
* much space is needed (and where) for other mappings.
* In some cases the chosen value may not be the maximum in order that
* we don't waste memory with kernel pages tables as we can't currently
* grow the kernel page tables after booting.
* You only need to increase these values if you find that the number of
* buffers is being limited due to lack of VA space.
*/
/*
* The range 0xf1000000 - 0xf5ffffff is available for kernel VM space
* Fixed mappings exist from 0xf6000000 - 0xffffffff
*/
#define KERNEL_VM_SIZE 0x05000000
/*
* Override the default pager_map size, there's not enough KVA.
*/
#define PAGER_MAP_SIZE (4 * 1024 * 1024)
/*
* Size of User Raw I/O map
*/
#define USRIOSIZE 300
/* XXX max. amount of KVM to be used by buffers. */
#ifndef VM_MAX_KERNEL_BUF
#define VM_MAX_KERNEL_BUF \
((KERNEL_VM_SIZE) * 4 / 10)
#endif
/* virtual sizes (bytes) for various kernel submaps */
#define VM_PHYS_SIZE (USRIOSIZE*NBPG)
/*
* max number of non-contig chunks of physical RAM you can have
*/
#define VM_PHYSSEG_MAX 32
/*
* when converting a physical address to a vm_page structure, we
* want to use a binary search on the chunks of physical memory
* to find our RAM
*/
#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
/*
* this indicates that we can't add RAM to the VM system after the
* vm system is init'd.
*/
#define VM_PHYSSEG_NOADD
/*
* we support 2 free lists:
*
* - DEFAULT for all systems
* - ISADMA for the ISA DMA range on Sharks only
* - RPCDMA for the DMA range on RiscPC's + Kinetic cards
*/
#define VM_NFREELIST 2
#define VM_FREELIST_DEFAULT 0
#define VM_FREELIST_ISADMA 1
#define VM_FREELIST_RPCDMA 1
#endif /* _KERNEL */
#endif /* _ARM32_VMPARAM_H_ */