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/* $OpenBSD: pmap.h,v 1.21 2004/05/20 09:20:42 kettenis Exp $ */
/* $NetBSD: pmap.h,v 1.37 1999/08/01 13:48:07 ragge Exp $ */
/*
* Copyright (c) 1987 Carnegie-Mellon University
* Copyright (c) 1991 Regents of the University of California.
* All rights reserved.
*
* Changed for the VAX port. /IC
*
* 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. 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.
*
* @(#)pmap.h 7.6 (Berkeley) 5/10/91
*/
#ifndef PMAP_H
#define PMAP_H
#include <machine/types.h>
#include <machine/pte.h>
#include <machine/mtpr.h>
#include <machine/pcb.h>
/*
* Some constants to make life easier.
*/
#define LTOHPS (PGSHIFT - VAX_PGSHIFT)
#define LTOHPN (1 << LTOHPS)
#define USRPTSIZE ((MAXTSIZ + MAXDSIZ + MAXSSIZ + MMAPSPACE) / VAX_NBPG)
#define NPTEPGS (USRPTSIZE / (sizeof(pt_entry_t) * LTOHPN))
/*
* Pmap structure
* pm_stack holds lowest allocated memory for the process stack.
*/
typedef struct pmap {
vaddr_t pm_stack; /* Base of alloced p1 pte space */
int ref_count; /* reference count */
pt_entry_t *pm_p0br; /* page 0 base register */
long pm_p0lr; /* page 0 length register */
pt_entry_t *pm_p1br; /* page 1 base register */
long pm_p1lr; /* page 1 length register */
int pm_lock; /* Lock entry in MP environment */
struct pmap_statistics pm_stats; /* Some statistics */
u_char pm_refcnt[NPTEPGS]; /* Refcount per pte page */
} *pmap_t;
/*
* For each vm_page_t, there is a list of all currently valid virtual
* mappings of that page. An entry is a pv_entry_t, the list is pv_table.
*/
struct pv_entry {
struct pv_entry *pv_next; /* next pv_entry */
pt_entry_t *pv_pte; /* pte for this physical page */
struct pmap *pv_pmap; /* pmap this entry belongs to */
int pv_attr; /* write/modified bits */
};
/* ROUND_PAGE used before vm system is initialized */
#define ROUND_PAGE(x) (((uint)(x) + PGOFSET) & ~PGOFSET)
#define TRUNC_PAGE(x) ((uint)(x) & ~PGOFSET)
/* Mapping macros used when allocating SPT */
#define MAPVIRT(ptr, count) \
(vm_offset_t)ptr = virtual_avail; \
virtual_avail += (count) * VAX_NBPG;
#define MAPPHYS(ptr, count, perm) \
(vm_offset_t)ptr = avail_start + KERNBASE; \
avail_start += (count) * VAX_NBPG;
#ifdef _KERNEL
extern struct pmap kernel_pmap_store;
#define pmap_kernel() (&kernel_pmap_store)
/*
* Real nice (fast) routines to get the virtual address of a physical page
* (and vice versa).
*/
#define PMAP_MAP_POOLPAGE(pg) (VM_PAGE_TO_PHYS(pg) | KERNBASE)
#define PMAP_UNMAP_POOLPAGE(va) PHYS_TO_VM_PAGE((va) & ~KERNBASE)
#define PMAP_STEAL_MEMORY
/*
* This is the by far most used pmap routine. Make it inline.
*/
/* Routines that are best to define as macros */
#define pmap_phys_address(phys) ((u_int)(phys) << PGSHIFT)
#define pmap_copy(a,b,c,d,e) /* Dont do anything */
#define pmap_update(pm) /* nothing */
#define pmap_collect(pmap) /* No need so far */
#define pmap_remove(pmap, start, slut) pmap_protect(pmap, start, slut, 0)
#define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count)
#define pmap_deactivate(p) /* Dont do anything */
#define pmap_reference(pmap) (pmap)->ref_count++
/* These can be done as efficient inline macros */
#define pmap_copy_page(srcpg, dstpg) do { \
paddr_t __src = VM_PAGE_TO_PHYS(srcpg); \
paddr_t __dst = VM_PAGE_TO_PHYS(dstpg); \
__asm__("addl3 $0x80000000,%0,r0;addl3 $0x80000000,%1,r1; \
movc3 $4096,(r0),(r1)" \
:: "r"(__src),"r"(__dst):"r0","r1","r2","r3","r4","r5"); \
} while (0)
#define pmap_zero_page(pg) do { \
paddr_t __pa = VM_PAGE_TO_PHYS(pg); \
__asm__("addl3 $0x80000000,%0,r0;movc5 $0,(r0),$0,$4096,(r0)" \
:: "r"(__pa): "r0","r1","r2","r3","r4","r5"); \
} while (0)
#define pmap_proc_iflush(p,va,len) /* nothing */
/* Prototypes */
void pmap_bootstrap(void);
vaddr_t pmap_map(vm_offset_t, vm_offset_t, vm_offset_t, int);
void pmap_pinit(pmap_t);
#endif /* _KERNEL */
#endif /* PMAP_H */
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