109 lines
4.0 KiB
C
109 lines
4.0 KiB
C
/*
|
|
* Copyright (c) 1987 Carnegie-Mellon University
|
|
* 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.
|
|
*
|
|
* 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: @(#)pmap.h 7.6 (Berkeley) 5/10/91
|
|
* $Id: pmap.h,v 1.1 1994/02/22 23:51:14 paulus Exp $
|
|
*/
|
|
|
|
#ifndef _PMAP_MACHINE_
|
|
#define _PMAP_MACHINE_
|
|
|
|
#define DA_PAGE_SIZE NBPG
|
|
#define DA_SEG_SIZE NBSEG
|
|
|
|
/*
|
|
* Pmap stuff
|
|
*/
|
|
struct pmap {
|
|
struct pte *pm_ptab; /* KVA of page table */
|
|
struct ste *pm_stab; /* KVA of segment table */
|
|
int pm_stchanged; /* ST changed */
|
|
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 pmap_t kernel_pmap;
|
|
|
|
/*
|
|
* Macros for speed
|
|
*/
|
|
#define PMAP_ACTIVATE(pmapp, pcbp, iscurproc) \
|
|
if ((pmapp) != NULL && (pmapp)->pm_stchanged) { \
|
|
(pcbp)->pcb_ustp = \
|
|
da30_btop(pmap_extract(kernel_pmap, (pmapp)->pm_stab)); \
|
|
if (iscurproc) \
|
|
loadustp((pcbp)->pcb_ustp); \
|
|
(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 */
|
|
struct ste *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_entry_t;
|
|
|
|
#define PV_CI 0x01 /* all entries must be cache inhibited */
|
|
#define PV_PTPAGE 0x02 /* entry maps a page table page */
|
|
|
|
#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_kernel() (kernel_pmap)
|
|
#define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count)
|
|
|
|
extern struct pte *Sysmap;
|
|
extern char *vmmap; /* map for mem, dumps, etc. */
|
|
#endif KERNEL
|
|
|
|
#endif _PMAP_MACHINE_
|