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Diffstat (limited to 'sys/arch/m68k/include/vmparam.h')
| -rw-r--r-- | sys/arch/m68k/include/vmparam.h | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/sys/arch/m68k/include/vmparam.h b/sys/arch/m68k/include/vmparam.h new file mode 100644 index 00000000000..698854e6c72 --- /dev/null +++ b/sys/arch/m68k/include/vmparam.h @@ -0,0 +1,178 @@ +/* $OpenBSD: vmparam.h,v 1.1 2003/01/27 19:37:30 miod Exp $ */ + +/* + * Copyright (c) 1988 University of Utah. + * Copyright (c) 1982, 1990 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * the Systems Programming Group of the University of Utah Computer + * Science Department. + * + * 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. + */ + +/* + * Machine dependent constants for m68k-based platforms. + */ +#ifndef _M68K_VMPARAM_H_ +#define _M68K_VMPARAM_H_ + +/* + * USRTEXT is the start of the user text/data space, while USRSTACK + * is the top (end) of the user stack. LOWPAGES and HIGHPAGES are + * the number of pages from the beginning of the P0 region to the + * beginning of the text and from the beginning of the P1 region to the + * beginning of the stack respectively. + * + * NOTE: the ONLY reason that HIGHPAGES is 0x100 instead of UPAGES (3) + * is for HPUX compatibility. Why?? Because HPUX's debuggers + * have the user's stack hard-wired at FFF00000 for post-mortems, + * and we must be compatible... + */ +#define USRTEXT 8192 +#define USRSTACK (-HIGHPAGES*NBPG) /* Start of user stack */ +#define LOWPAGES 0 +#define HIGHPAGES (0x100000/NBPG) + +/* + * 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 + +/* + * Sizes of the system and user portions of the system page table. + */ +#define USRPTSIZE (1 * NPTEPG) /* 4mb */ + +/* + * PTEs for mapping user space into the kernel for phyio operations. + * One page is enough to handle 4Mb of simultaneous raw IO operations. + */ +#ifndef USRIOSIZE +#define USRIOSIZE (1 * NPTEPG) /* 4mb */ +#endif + +/* + * PTEs for system V style shared memory. + * This is basically slop for kmempt which we actually allocate (malloc) from. + */ +#ifndef SHMMAXPGS +#define SHMMAXPGS 1024 /* 4mb */ +#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 + +/* user/kernel map constants */ +#define VM_MIN_ADDRESS ((vaddr_t)0) +#define VM_MAXUSER_ADDRESS ((vaddr_t)(USRSTACK)) +#define VM_MAX_ADDRESS ((vaddr_t)(0-(UPAGES*NBPG))) +#define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) +#define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(0-NBPG)) + +/* virtual sizes (bytes) for various kernel submaps */ +#define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) + +/* # of kernel PT pages (initial only, can grow dynamically) */ +#define VM_KERNEL_PT_PAGES ((vsize_t)2) + +/* pcb base */ +#define pcbb(p) ((u_int)(p)->p_addr) + +/* + * Constants which control the way the VM system deals with memory segments. + */ +#define VM_PHYSSEG_NOADD + +#define VM_NFREELIST 1 +#define VM_FREELIST_DEFAULT 0 + +#ifndef _LOCORE + +#include <machine/pte.h> /* st_entry_t */ + +/* 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 */ + st_entry_t *pv_ptste; /* non-zero if VA maps a PT page */ + struct pmap *pv_ptpmap; /* if pv_ptste, pmap for PT page */ + int pv_flags; /* flags */ +}; + +/* + * pv_flags carries some PTE permission bits as well - make sure extra flags + * values are > (1 << PG_SHIFT) + */ +/* header: all entries are cache inhibited */ +#define PV_CI (0x01 << PG_SHIFT) +/* header: entry maps a page table page */ +#define PV_PTPAGE (0x02 << PG_SHIFT) + +#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 = NULL; \ + (pg)->mdpage.pvent.pv_va = 0; \ + (pg)->mdpage.pvent.pv_ptste = NULL; \ + (pg)->mdpage.pvent.pv_ptpmap = NULL; \ + (pg)->mdpage.pvent.pv_flags = 0; \ +} while (0) + +#endif /* _LOCORE */ + +#endif /* !_M68K_VMPARAM_H_ */ |