206 lines
6.4 KiB
C
206 lines
6.4 KiB
C
/* $NetBSD: vmparam.h,v 1.17 2000/01/10 07:44:55 mark 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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#ifndef _ARM32_VMPARAM_H_
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#define _ARM32_VMPARAM_H_
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/* for pt_entry_t definition */
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#include <machine/pte.h>
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#define USRTEXT VM_MIN_ADDRESS
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#define USRSTACK VM_MAXUSER_ADDRESS
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/*
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* Note that MAXTSIZ mustn't be greater than 32M. Otherwise you'd have
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* to change the compiler to not generate bl instructions
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*/
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#define MAXTSIZ (16*1024*1024) /* max text size */
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#ifndef DFLDSIZ
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#define DFLDSIZ (128*1024*1024) /* initial data size limit */
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#endif
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#ifndef MAXDSIZ
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#define MAXDSIZ (512*1024*1024) /* max data size */
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#endif
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#ifndef DFLSSIZ
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#define DFLSSIZ (2*1024*1024) /* initial stack size limit */
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#endif
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#ifndef MAXSSIZ
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#define MAXSSIZ (8*1024*1024) /* max stack size */
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#endif
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/*
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* Size of shared memory map
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*/
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#ifndef SHMMAXPGS
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#define SHMMAXPGS 1024
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#endif
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/*
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* The time for a process to be blocked before being very swappable.
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* This is a number of seconds which the system takes as being a non-trivial
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* amount of real time. You probably shouldn't change this;
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* it is used in subtle ways (fractions and multiples of it are, that is, like
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* half of a `long time'', almost a long time, etc.)
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* It is related to human patience and other factors which don't really
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* change over time.
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*/
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#define MAXSLP 20
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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_SPACE_START are constant across all processes
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*/
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#define KERNEL_SPACE_START 0xf0000000
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/* total number of page table entries to map 4GB * size of each entry*/
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#define PAGE_TABLE_SPACE ((1 << (32 - PGSHIFT)) * sizeof(pt_entry_t))
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/* Address where the page tables are mapped */
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#define PAGE_TABLE_SPACE_START (KERNEL_SPACE_START - PAGE_TABLE_SPACE)
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/* Various constants used by the MD code*/
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#define KERNEL_BASE 0xf0000000
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#define KERNEL_TEXT_BASE KERNEL_BASE
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#define ALT_PAGE_TBLS_BASE 0xf0c00000
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#define KERNEL_VM_BASE 0xf1000000
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/*
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* The Kernel VM Size varies depending on the machine depending on how
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* much space is needed (and where) for other mappings.
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* In some cases the chosen value may not be the maximum in order that
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* we don't waste memory with kernel pages tables as we can't currently
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* grow the kernel page tables after booting.
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* You only need to increase these values if you find that the number of
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* buffers is being limited due to lack of VA space.
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*/
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#if defined(FOOTBRIDGE)
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/*
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* The range 0xf1000000 - 0xfcffffff is available for kernel VM space
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* Footbridge registers and I/O mappings occupy 0xfd000000 - 0xffffffff
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*/
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#define KERNEL_VM_SIZE 0x07000000
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#elif defined(SHARK)
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/*
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* The range 0xf1000000 - 0xf6ffffff is available for kernel VM space
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* OFW sites at 0xf7000000
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*/
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#define KERNEL_VM_SIZE 0x04000000
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#else
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/*
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* The range 0xf1000000 - 0xf3ffffff is available for kernel VM space
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* Fixed mappings exist from 0xf4000000 - 0xffffffff
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*/
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#define KERNEL_VM_SIZE 0x03000000
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#endif
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#define PROCESS_PAGE_TBLS_BASE PAGE_TABLE_SPACE_START
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/*
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* Mach derived constants
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*/
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#define VM_MIN_ADDRESS ((vm_offset_t)0x00001000)
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#define VM_MAXUSER_ADDRESS ((vm_offset_t)(PAGE_TABLE_SPACE_START - UPAGES * NBPG))
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#define VM_MAX_ADDRESS ((vm_offset_t)(PAGE_TABLE_SPACE_START + (KERNEL_SPACE_START >> PGSHIFT) * sizeof(pt_entry_t)))
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#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)KERNEL_TEXT_BASE)
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#define VM_MAXKERN_ADDRESS ((vm_offset_t)(KERNEL_VM_BASE + KERNEL_VM_SIZE))
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#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)0xffffffff)
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/*
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* Size of User Raw I/O map
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*/
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#define USRIOSIZE 300
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/* XXX max. amount of KVM to be used by buffers. */
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#ifndef VM_MAX_KERNEL_BUF
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#define VM_MAX_KERNEL_BUF \
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((VM_MAXKERN_ADDRESS - KERNEL_VM_BASE) * 4 / 10)
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#endif
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/* virtual sizes (bytes) for various kernel submaps */
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#define VM_KMEM_SIZE (NKMEMCLUSTERS*NBPG)
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#define VM_PHYS_SIZE (USRIOSIZE*NBPG)
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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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* when converting a physical address to a vm_page structure, we
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* want to use a binary search on the chunks of physical memory
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* to find our RAM
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*/
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#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
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/*
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* this indicates that we can't add RAM to the VM system after the
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* vm system is init'd.
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*/
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#define VM_PHYSSEG_NOADD
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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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* define structure pmap_physseg: there is one of these structures
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* for each chunk of noncontig RAM you have.
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*/
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struct pmap_physseg {
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struct pv_entry *pvent; /* pv_entry array */
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char *attrs; /* attrs array */
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};
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#endif /* _ARM32_VMPARAM_H_ */
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/* End of vmparam.h */
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