218 lines
8.0 KiB
C
218 lines
8.0 KiB
C
/* $NetBSD: pmap.h,v 1.14 1997/02/02 18:19:55 scottr 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.
|
|
*/
|
|
/*-
|
|
* Copyright (C) 1993 Allen K. Briggs, Chris P. Caputo,
|
|
* Michael L. Finch, Bradley A. Grantham, and
|
|
* Lawrence A. Kesteloot
|
|
* All rights reserved.
|
|
*
|
|
* 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 Alice Group.
|
|
* 4. The names of the Alice Group or any of its members may not be used
|
|
* to endorse or promote products derived from this software without
|
|
* specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``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 ALICE GROUP 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 _PMAP_MACHINE_
|
|
#define _PMAP_MACHINE_
|
|
|
|
#include <machine/pcb.h>
|
|
#include <machine/pte.h>
|
|
|
|
#if defined(M68040)
|
|
#define MAC_SEG_SIZE (mmutype == MMU_68040 ? 0x40000 : NBSEG)
|
|
#else
|
|
#define MAC_SEG_SIZE NBSEG
|
|
#endif
|
|
|
|
#define mac68k_trunc_seg(x) (((unsigned)(x)) & ~(MAC_SEG_SIZE-1))
|
|
#define mac68k_round_seg(x) mac68k_trunc_seg((unsigned)(x)+MAC_SEG_SIZE-1)
|
|
|
|
/*
|
|
* Pmap stuff
|
|
*/
|
|
struct pmap {
|
|
pt_entry_t *pm_ptab; /* KVA of page table */
|
|
st_entry_t *pm_stab; /* KVA of segment table */
|
|
int pm_stchanged; /* ST changed */
|
|
int pm_stfree; /* 040: free lev2 blocks */
|
|
st_entry_t *pm_stpa; /* 040: ST phys addr */
|
|
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;
|
|
|
|
/*
|
|
* On the 040, we keep track of which level 2 blocks are already in use
|
|
* with the pm_stfree mask. Bits are arranged from LSB (block 0) to MSB
|
|
* (block 31). For convenience, the level 1 table is considered to be
|
|
* block 0.
|
|
*
|
|
* MAX[KU]L2SIZE control how many pages of level 2 descriptors are allowed
|
|
* for the kernel and users. 8 implies only the initial "segment table"
|
|
* page is used. WARNING: don't change MAXUL2SIZE unless you can allocate
|
|
* physically contiguous pages for the ST in pmap.c!
|
|
*/
|
|
#define MAXKL2SIZE 32
|
|
#define MAXUL2SIZE 8
|
|
#define l2tobm(n) (1 << (n))
|
|
#define bmtol2(n) (ffs(n) - 1)
|
|
|
|
/*
|
|
* Macros for speed
|
|
*/
|
|
#define PMAP_ACTIVATE(pmapp, pcbp, iscurproc) \
|
|
if ((pmapp)->pm_stchanged) { \
|
|
(pcbp)->pcb_ustp = mac68k_btop((vm_offset_t)(pmapp)->pm_stpa); \
|
|
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 */
|
|
st_entry_t *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 */
|
|
|
|
struct pv_page;
|
|
|
|
struct pv_page_info {
|
|
TAILQ_ENTRY(pv_page) pgi_list;
|
|
struct pv_entry *pgi_freelist;
|
|
int pgi_nfree;
|
|
};
|
|
|
|
/*
|
|
* This is basically:
|
|
* ((NBPG - sizeof(struct pv_page_info)) / sizeof(struct pv_entry))
|
|
*/
|
|
#define NPVPPG 170
|
|
|
|
struct pv_page {
|
|
struct pv_page_info pvp_pgi;
|
|
struct pv_entry pvp_pv[NPVPPG];
|
|
};
|
|
|
|
#ifdef _KERNEL
|
|
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)
|
|
|
|
extern struct pv_entry *pv_table; /* array of entries, one per page */
|
|
|
|
#define pa_to_pvh(pa) (&pv_table[pmap_page_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. */
|
|
|
|
__BEGIN_DECLS
|
|
/* pmap.c */
|
|
void mac68k_set_pte __P((vm_offset_t va, vm_offset_t pge));
|
|
void pmap_remove_mapping __P((pmap_t, vm_offset_t, pt_entry_t *, int));
|
|
boolean_t pmap_testbit __P((vm_offset_t, int));
|
|
void pmap_changebit __P((vm_offset_t, int, boolean_t));
|
|
void pmap_enter_ptpage __P((pmap_t, vm_offset_t));
|
|
void pmap_pvdump __P((vm_offset_t));
|
|
void pmap_check_wiring __P((char *, vm_offset_t));
|
|
void pmap_collect_pv __P((void));
|
|
void pmap_activate __P((register pmap_t, struct pcb *));
|
|
void pmap_deactivate __P((register pmap_t, struct pcb *));
|
|
|
|
/* pmap_bootstrap.c */
|
|
void pmap_bootstrap __P((vm_offset_t, register vm_offset_t));
|
|
void bootstrap_mac68k __P((int));
|
|
|
|
/* locore.s */
|
|
void loadustp __P((vm_offset_t));
|
|
void TBIA __P((void));
|
|
void TBIS __P((vm_offset_t));
|
|
void DCFP __P((vm_offset_t));
|
|
void ICPP __P((vm_offset_t));
|
|
__END_DECLS
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* _PMAP_MACHINE_ */
|