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Diffstat (limited to 'sys/arch/m88k/include/vmparam.h')
| -rw-r--r-- | sys/arch/m88k/include/vmparam.h | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/sys/arch/m88k/include/vmparam.h b/sys/arch/m88k/include/vmparam.h new file mode 100644 index 00000000000..3d127a7a6af --- /dev/null +++ b/sys/arch/m88k/include/vmparam.h @@ -0,0 +1,133 @@ +/* $OpenBSD: vmparam.h,v 1.1 2004/04/26 12:34:05 miod Exp $ */ +/* + * Mach Operating System + * Copyright (c) 1992 Carnegie Mellon University + * All Rights Reserved. + * + * Permission to use, copy, modify and distribute this software and its + * documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR + * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie Mellon + * the rights to redistribute these changes. + */ + +/* + * machine dependent virtual memory parameters. + */ + + +#ifndef _MACHINE_VM_PARAM_ +#define _MACHINE_VM_PARAM_ + +/* + * USRTEXT is the start of the user text/data space, while USRSTACK + * is the top (end) of the user stack. + */ +#define USRTEXT 0x1000 /* Start of user text */ +#define USRSTACK 0x80000000 /* Start of user stack */ + +/* + * Virtual memory related constants, all in bytes + */ +#ifndef MAXTSIZ +#define MAXTSIZ (8*1024*1024) /* max text size */ +#endif +#ifndef DFLDSIZ +#define DFLDSIZ (32*1024*1024) /* initial data size limit */ +#endif +#ifndef MAXDSIZ +#define MAXDSIZ (64*1024*1024) /* max data size */ +#endif +#ifndef DFLSSIZ +#define DFLSSIZ (2*1024*1024) /* initial stack size limit */ +#endif +#ifndef MAXSSIZ +#define MAXSSIZ MAXDSIZ /* 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 + +#define VM_MIN_ADDRESS ((vaddr_t) 0) +#define VM_MAX_ADDRESS ((vaddr_t) 0xffc00000) +#define VM_MAXUSER_ADDRESS VM_MAX_ADDRESS + +/* on vme188, max = 0xf0000000 */ + +#define VM_MIN_KERNEL_ADDRESS ((vaddr_t) 0) +#define VM_MAX_KERNEL_ADDRESS ((vaddr_t) 0x20000000) + +#define KERNEL_STACK_SIZE (3 * PAGE_SIZE) /* kernel stack size */ +#define INTSTACK_SIZE (4 * PAGE_SIZE) /* interrupt stack size */ + +/* virtual sizes (bytes) for various kernel submaps */ +#define VM_PHYS_SIZE (1 * NPTEPG * PAGE_SIZE) + +/* + * Constants which control the way the VM system deals with memory segments. + * The mvme88k only has one physical memory segment. + */ +#define VM_PHYSSEG_MAX 1 +#define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH +#define VM_PHYSSEG_NOADD + +#define VM_NFREELIST 1 +#define VM_FREELIST_DEFAULT 0 + +#ifndef _LOCORE +/* + * pmap-specific data stored in the vm_physmem[] array. + */ + +/* XXX - belongs in pmap.h, but put here because of ordering issues */ +struct pv_entry { + struct pv_entry *pv_next; /* next pv_entry */ + struct pmap *pv_pmap; /* pmap where mapping lies */ + vaddr_t pv_va; /* virtual address for mapping */ + int pv_flags; +}; + +#define __HAVE_VM_PAGE_MD +struct vm_page_md { + struct pv_entry pvent; +}; + +#define VM_MDPAGE_INIT(pg) do { \ + (pg)->mdpage.pvent.pv_next = NULL; \ + (pg)->mdpage.pvent.pv_pmap = PMAP_NULL; \ + (pg)->mdpage.pvent.pv_va = 0; \ + (pg)->mdpage.pvent.pv_flags = 0; \ +} while (0) + +#endif /* _LOCORE */ + +#endif /* _MACHINE_VM_PARAM_ */ |