20bd6675fb
we don't flush all mappings of a physical page in order to make it virtually cachable again, if it is already cachable.
120 lines
4.0 KiB
C
120 lines
4.0 KiB
C
/*
|
|
* Copyright (c) 1991 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 and William Jolitz of UUNET Technologies Inc.
|
|
*
|
|
* 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.
|
|
*
|
|
* from: hp300: @(#)pmap.h 7.2 (Berkeley) 12/16/90
|
|
* from: @(#)pmap.h 7.4 (Berkeley) 5/12/91
|
|
* from: FreeBSD: src/sys/i386/include/pmap.h,v 1.70 2000/11/30
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _MACHINE_PMAP_H_
|
|
#define _MACHINE_PMAP_H_
|
|
|
|
#include <machine/tte.h>
|
|
|
|
#define DCACHE_COLOR_BITS (1)
|
|
#define DCACHE_COLORS (1 << DCACHE_COLOR_BITS)
|
|
#define DCACHE_COLOR_MASK (DCACHE_COLORS - 1)
|
|
#define DCACHE_COLOR(va) (((va) >> PAGE_SHIFT) & DCACHE_COLOR_MASK)
|
|
|
|
#define PMAP_CONTEXT_MAX 8192
|
|
|
|
#define PG_UNCACHEABLE (1<<0)
|
|
|
|
#define pmap_resident_count(pm) (pm->pm_stats.resident_count)
|
|
|
|
typedef struct pmap *pmap_t;
|
|
|
|
struct md_page {
|
|
STAILQ_HEAD(, tte) tte_list;
|
|
int colors[DCACHE_COLORS];
|
|
int flags;
|
|
};
|
|
|
|
struct pmap {
|
|
struct tte *pm_tsb;
|
|
vm_object_t pm_tsb_obj;
|
|
u_int pm_active;
|
|
u_int pm_context[MAXCPU];
|
|
struct pmap_statistics pm_stats;
|
|
};
|
|
|
|
void pmap_bootstrap(vm_offset_t ekva);
|
|
void pmap_context_rollover(void);
|
|
vm_offset_t pmap_kextract(vm_offset_t va);
|
|
void pmap_kenter_flags(vm_offset_t va, vm_offset_t pa, u_long flags);
|
|
void pmap_qenter_flags(vm_offset_t va, vm_page_t *m, int count, u_long fl);
|
|
|
|
int pmap_cache_enter(vm_page_t m, vm_offset_t va);
|
|
void pmap_cache_remove(vm_page_t m, vm_offset_t va);
|
|
|
|
int pmap_remove_tte(struct pmap *pm1, struct pmap *pm2, struct tte *tp,
|
|
vm_offset_t va);
|
|
int pmap_protect_tte(struct pmap *pm1, struct pmap *pm2, struct tte *tp,
|
|
vm_offset_t va);
|
|
|
|
void pmap_map_tsb(void);
|
|
|
|
void pmap_remove_all(vm_page_t m);
|
|
|
|
void pmap_clear_write(vm_page_t m);
|
|
|
|
#define vtophys(va) pmap_kextract(((vm_offset_t) (va)))
|
|
|
|
extern vm_offset_t avail_start;
|
|
extern vm_offset_t avail_end;
|
|
extern struct pmap kernel_pmap_store;
|
|
#define kernel_pmap (&kernel_pmap_store)
|
|
extern vm_offset_t phys_avail[];
|
|
extern vm_offset_t virtual_avail;
|
|
extern vm_offset_t virtual_end;
|
|
extern vm_offset_t kernel_page;
|
|
|
|
extern int pmap_pagedaemon_waken;
|
|
|
|
extern vm_offset_t msgbuf_phys;
|
|
|
|
static __inline int
|
|
pmap_track_modified(pmap_t pm, vm_offset_t va)
|
|
{
|
|
if (pm == kernel_pmap)
|
|
return ((va < kmi.clean_sva) || (va >= kmi.clean_eva));
|
|
else
|
|
return (1);
|
|
}
|
|
|
|
#endif /* !_MACHINE_PMAP_H_ */
|