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/* $NetBSD: pmap.h,v 1.6 1995/06/09 19:43:41 leo Exp $ */
/*
* 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.
*
* @(#)pmap.h 7.6 (Berkeley) 5/10/91
*/
#ifndef _MACHINE_PMAP_H_
#define _MACHINE_PMAP_H_
/*
* Pmap stuff (in anticipation of '40 support)
*/
struct pmap {
u_int *pm_ptab; /* KVA of page table */
u_int *pm_stab; /* KVA of segment table */
u_int *pm_rtab; /* KVA of 68040 root table */
int pm_stchanged; /* ST changed */
short pm_sref; /* segment table ref count */
short pm_count; /* pmap reference count */
long pm_ptpages; /* more stats: PT pages */
simple_lock_data_t pm_lock; /* lock on pmap */
struct pmap_statistics pm_stats; /* pmap statistics */
};
typedef struct pmap *pmap_t;
/*
* Macros for speed
*/
#define PMAP_ACTIVATE(pmapp, pcbp, iscurproc) \
if ((pmapp) != NULL && (pmapp)->pm_stchanged) { \
(pcbp)->pcb_ustp = \
atari_btop(pmap_extract(pmap_kernel(), \
cpu040 ? (vm_offset_t)(pmapp)->pm_rtab : \
(vm_offset_t)(pmapp)->pm_stab)); \
if (iscurproc) \
loadustp((pcbp)->pcb_ustp); \
(pmapp)->pm_stchanged = FALSE; \
}
#define PMAP_DEACTIVATE(pmapp, pcbp)
/*
* Description of the memory segments. Build in atari_init/start_c().
* This gives a better separation between machine dependent stuff and
* the pmap-module.
*/
#define NPHYS_SEGS 8
struct physeg {
vm_offset_t start; /* PA of first page in segment */
vm_offset_t end; /* PA of last page in segment */
int first_page; /* relative page# of 'start' */
};
/*
* 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 */
u_int *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
struct physeg phys_segs[NPHYS_SEGS];
pv_entry_t pv_table; /* array of entries, one per page */
u_int *Sysmap;
char *vmmap; /* map for mem, dumps, etc. */
struct pmap kernel_pmap_store;
#ifdef MACHINE_NONCONTIG
#define pa_index(pa) pmap_page_index(pa)
#else
#define pa_index(pa) atop(pa - vm_first_phys)
#endif /* MACHINE_NONCONTIG */
#define pa_to_pvh(pa) (&pv_table[pa_index(pa)])
#define pmap_kernel() (&kernel_pmap_store)
#define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count)
#endif /* _KERNEL */
#endif /* !_MACHINE_PMAP_H_ */
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