132 lines
4.7 KiB
C
132 lines
4.7 KiB
C
/* $NetBSD: pmap.old.h,v 1.7 1997/04/06 08:47:35 cgd 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>
|
|
|
|
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)
|
|
|
|
/*
|
|
* Pmap stuff
|
|
*/
|
|
struct pmap {
|
|
pt_entry_t *pm_ptab; /* KVA of page table */
|
|
pt_entry_t *pm_stab; /* KVA of segment table */
|
|
int pm_stchanged; /* ST changed */
|
|
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() || (pm) == curproc->p_vmspace->vm_map.pmap)
|
|
|
|
/*
|
|
* Macros for speed
|
|
*/
|
|
#define PMAP_ACTIVATE(pmapp, iscurproc) \
|
|
if ((pmapp) != NULL && (pmapp)->pm_stchanged) { \
|
|
if (iscurproc) \
|
|
loadustp((pmapp)->pm_stpte); \
|
|
(pmapp)->pm_stchanged = FALSE; \
|
|
}
|
|
#define PMAP_DEACTIVATE(pmapp, pcbp)
|
|
|
|
/*
|
|
* 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 */
|
|
|
|
/*
|
|
* bits of pmap_attributes[]
|
|
*/
|
|
#define PMAP_ATTR_MOD 0x01 /* modified */
|
|
#define PMAP_ATTR_REF 0x02 /* referenced */
|
|
|
|
#ifdef _KERNEL
|
|
pv_entry_t pv_table; /* array of entries, one per page */
|
|
|
|
#define pa_index(pa) atop(pa - vm_first_phys)
|
|
#define pa_to_pvh(pa) (&pv_table[pa_index(pa)])
|
|
|
|
#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. */
|
|
|
|
/* Machine-specific functions. */
|
|
void pmap_activate __P((pmap_t));
|
|
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_ */
|