NetBSD/sys/arch/arm32/include/vmparam.h

210 lines
6.5 KiB
C

/* $NetBSD: vmparam.h,v 1.19 2000/11/27 08:19:50 chs 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_
/* for pt_entry_t definition */
#include <machine/pte.h>
#define USRTEXT VM_MIN_ADDRESS
#define USRSTACK VM_MAXUSER_ADDRESS
/*
* Note that MAXTSIZ mustn't be greater than 32M. Otherwise you'd have
* to change the compiler to not generate bl instructions
*/
#define MAXTSIZ (16*1024*1024) /* max text size */
#ifndef DFLDSIZ
#define DFLDSIZ (128*1024*1024) /* initial data size limit */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ (512*1024*1024) /* max data size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (2*1024*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ (8*1024*1024) /* max stack size */
#endif
/*
* Size of shared memory map
*/
#ifndef SHMMAXPGS
#define SHMMAXPGS 1024
#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
/*
* Address space constants
*/
/*
* The line between user space and kernel space
* Mappings >= KERNEL_SPACE_START are constant across all processes
*/
#define KERNEL_SPACE_START 0xf0000000
/* total number of page table entries to map 4GB * size of each entry*/
#define PAGE_TABLE_SPACE ((1 << (32 - PGSHIFT)) * sizeof(pt_entry_t))
/* Address where the page tables are mapped */
#define PAGE_TABLE_SPACE_START (KERNEL_SPACE_START - PAGE_TABLE_SPACE)
/* Various constants used by the MD code*/
#define KERNEL_BASE 0xf0000000
#define KERNEL_TEXT_BASE KERNEL_BASE
#define ALT_PAGE_TBLS_BASE 0xf0c00000
#define KERNEL_VM_BASE 0xf1000000
/*
* 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.
*/
#if defined(FOOTBRIDGE)
/*
* The range 0xf1000000 - 0xfcffffff is available for kernel VM space
* Footbridge registers and I/O mappings occupy 0xfd000000 - 0xffffffff
*/
#define KERNEL_VM_SIZE 0x07000000
#elif defined(SHARK)
/*
* The range 0xf1000000 - 0xf6ffffff is available for kernel VM space
* OFW sites at 0xf7000000
*/
#define KERNEL_VM_SIZE 0x04000000
#else
/*
* The range 0xf1000000 - 0xf3ffffff is available for kernel VM space
* Fixed mappings exist from 0xf4000000 - 0xffffffff
*/
#define KERNEL_VM_SIZE 0x03000000
#endif
#define PROCESS_PAGE_TBLS_BASE PAGE_TABLE_SPACE_START
/*
* Override the default pager_map size, there's not enough KVA.
*/
#define PAGER_MAP_SIZE (4 * 1024 * 1024)
/*
* Mach derived constants
*/
#define VM_MIN_ADDRESS ((vm_offset_t)0x00001000)
#define VM_MAXUSER_ADDRESS ((vm_offset_t)(PAGE_TABLE_SPACE_START - UPAGES * NBPG))
#define VM_MAX_ADDRESS ((vm_offset_t)(PAGE_TABLE_SPACE_START + (KERNEL_SPACE_START >> PGSHIFT) * sizeof(pt_entry_t)))
#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)KERNEL_TEXT_BASE)
#define VM_MAXKERN_ADDRESS ((vm_offset_t)(KERNEL_VM_BASE + KERNEL_VM_SIZE))
#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)0xffffffff)
/*
* 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 \
((VM_MAXKERN_ADDRESS - KERNEL_VM_BASE) * 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
*/
#define VM_NFREELIST 2
#define VM_FREELIST_DEFAULT 0
#define VM_FREELIST_ISADMA 1
/*
* define structure pmap_physseg: there is one of these structures
* for each chunk of noncontig RAM you have.
*/
struct pmap_physseg {
struct pv_entry *pvent; /* pv_entry array */
char *attrs; /* attrs array */
};
#endif /* _ARM32_VMPARAM_H_ */
/* End of vmparam.h */