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/* $Id$ */
/* From: NetBSD: pmap.old.h,v 1.16 1998/01/09 19:13:09 thorpej Exp */
/*
* Copyright (c) 1987 Carnegie-Mellon University
* Copyright (c) 1991, 1993
* 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.
*
* @(#)pmap.h 8.1 (Berkeley) 6/10/93
*/
#ifndef _PMAP_MACHINE_
#define _PMAP_MACHINE_
#include <machine/pte.h>
#include <machine/lock.h>
extern vm_offset_t vtophys(vm_offset_t);
#define ALPHA_PAGE_SIZE NBPG
#define ALPHA_SEG_SIZE NBSEG
#define alpha_trunc_seg(x) (((u_long)(x)) & ~(ALPHA_SEG_SIZE-1))
#define alpha_round_seg(x) alpha_trunc_seg((u_long)(x) + ALPHA_SEG_SIZE-1)
typedef struct simplelock simple_lock_data_t;
/*
* Pmap stuff
*/
struct pmap {
pt_entry_t *pm_ptab; /* KVA of page table */
pt_entry_t *pm_stab; /* KVA of segment table */
pt_entry_t pm_stpte; /* PTE mapping STE */
short pm_sref; /* segment table ref count */
short pm_count; /* pmap reference count */
simple_lock_data_t pm_lock; /* lock on pmap */
struct pmap_statistics pm_stats; /* pmap statistics */
long pm_ptpages; /* more stats: PT pages */
};
typedef struct pmap *pmap_t;
extern struct pmap kernel_pmap_store;
#define pmap_kernel() (&kernel_pmap_store)
#define active_pmap(pm) \
((pm) == pmap_kernel() \
|| curproc == NULL \
|| (pm) == curproc->p_vmspace->vm_map.pmap)
#define active_user_pmap(pm) \
(curproc && \
(pm) != pmap_kernel() && (pm) == curproc->p_vmspace->vm_map.pmap)
/*
* 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.
*/
typedef struct pv_entry {
struct pv_entry *pv_next; /* next pv_entry */
struct pmap *pv_pmap; /* pmap where mapping lies */
vm_offset_t pv_va; /* virtual address for mapping */
pt_entry_t *pv_ptpte; /* non-zero if VA maps a PT page */
struct pmap *pv_ptpmap; /* if pv_ptpte, pmap for PT page */
int pv_flags; /* flags */
} *pv_entry_t;
#define PV_PTPAGE 0x01 /* header: entry maps a page table page */
struct pv_page_info {
TAILQ_ENTRY(pv_page) pgi_list;
struct pv_entry *pgi_freelist;
int pgi_nfree;
};
#define NPVPPG ((NBPG - sizeof(struct pv_page_info)) / sizeof(struct pv_entry))
struct pv_page {
struct pv_page_info pvp_pgi;
struct pv_entry pvp_pv[NPVPPG];
};
/*
* Physical page attributes.
*/
typedef int pmap_attr_t;
#define PMAP_ATTR_MOD 0x01 /* modified */
#define PMAP_ATTR_REF 0x02 /* referenced */
#ifdef _KERNEL
#define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count)
#define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count)
extern pt_entry_t *Sysmap;
extern char *vmmap; /* map for mem, dumps, etc. */
#if defined(MACHINE_NEW_NONCONTIG)
#define PMAP_STEAL_MEMORY /* enable pmap_steal_memory() */
#endif
/* Machine-specific functions. */
void pmap_bootstrap __P((vm_offset_t firstaddr, vm_offset_t ptaddr));
void pmap_emulate_reference __P((struct proc *p, vm_offset_t v,
int user, int write));
void pmap_unmap_prom __P((void));
#endif /* _KERNEL */
#endif /* _PMAP_MACHINE_ */
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