252 lines
8.6 KiB
C
252 lines
8.6 KiB
C
/* $NetBSD: pmap.old.h,v 1.31 1998/03/18 19:39:23 thorpej Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1998 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
|
|
* NASA Ames Research Center and by Chris G. Demetriou.
|
|
*
|
|
* 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 NetBSD
|
|
* Foundation, Inc. and its contributors.
|
|
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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) 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 <sys/queue.h>
|
|
#include <machine/pte.h>
|
|
|
|
/*
|
|
* Machine-dependent virtual memory state.
|
|
*
|
|
* If we ever support processor numbers higher than 63, we'll have to
|
|
* rethink the CPU mask.
|
|
*
|
|
* XXX When we support multiple processors, pm_asn and pm_asngen need
|
|
* XXX to be per-processor.
|
|
*/
|
|
struct pmap {
|
|
LIST_ENTRY(pmap) pm_list; /* list of all pmaps */
|
|
pt_entry_t *pm_lev1map; /* level 1 map */
|
|
int pm_count; /* pmap reference count */
|
|
simple_lock_data_t pm_lock; /* lock on pmap */
|
|
struct pmap_statistics pm_stats; /* pmap statistics */
|
|
long pm_nlev2; /* level 2 pt page count */
|
|
long pm_nlev3; /* level 3 pt page count */
|
|
unsigned int pm_asn; /* address space number */
|
|
unsigned long pm_asngen; /* ASN generation number */
|
|
unsigned long pm_cpus; /* mask of CPUs using pmap */
|
|
};
|
|
|
|
typedef struct pmap *pmap_t;
|
|
|
|
#define PMAP_ASNGEN_INVALID 0 /* invalid generation; never matches */
|
|
|
|
extern struct pmap kernel_pmap_store;
|
|
|
|
#define pmap_kernel() (&kernel_pmap_store)
|
|
|
|
/*
|
|
* 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 {
|
|
LIST_ENTRY(pv_entry) pv_list; /* pv_entry list */
|
|
struct pmap *pv_pmap; /* pmap where mapping lies */
|
|
vm_offset_t pv_va; /* virtual address for mapping */
|
|
} *pv_entry_t;
|
|
|
|
/*
|
|
* The head of the list of pv_entry_t's, also contains page attributes.
|
|
*/
|
|
struct pv_head {
|
|
LIST_HEAD(, pv_entry) pvh_list; /* pv_entry list */
|
|
int pvh_attrs; /* page attributes */
|
|
int pvh_ptref; /* ref count if PT page */
|
|
};
|
|
|
|
/* pvh_attrs */
|
|
#define PMAP_ATTR_MOD 0x01 /* modified */
|
|
#define PMAP_ATTR_REF 0x02 /* referenced */
|
|
#define PMAP_ATTR_PTPAGE 0x04 /* is a page table page */
|
|
|
|
struct pv_page_info {
|
|
TAILQ_ENTRY(pv_page) pgi_list;
|
|
LIST_HEAD(, pv_entry) pgi_freelist;
|
|
int pgi_nfree;
|
|
};
|
|
|
|
#define NPVPPG ((NBPG - sizeof(struct pv_page_info)) / sizeof(struct pv_entry))
|
|
|
|
struct pv_page {
|
|
struct pv_page_info pvp_pgi;
|
|
struct pv_entry pvp_pv[NPVPPG];
|
|
};
|
|
|
|
#ifdef _KERNEL
|
|
|
|
#include "opt_avalon_a12.h" /* XXX */
|
|
#include "opt_dec_3000_300.h" /* XXX */
|
|
#include "opt_dec_3000_500.h" /* XXX */
|
|
#include "opt_dec_kn8ae.h" /* XXX */
|
|
|
|
#if defined(DEC_3000_300) \
|
|
|| defined(DEC_3000_500) \
|
|
|| defined(DEC_KN8AE) /* XXX */
|
|
#define _PMAP_MAY_USE_PROM_CONSOLE /* XXX */
|
|
#endif /* XXX */
|
|
|
|
#define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count)
|
|
#define pmap_wired_count(pmap) ((pmap)->pm_stats.wired_count)
|
|
|
|
extern pt_entry_t *VPT; /* Virtual Page Table */
|
|
|
|
#define PMAP_STEAL_MEMORY /* enable pmap_steal_memory() */
|
|
|
|
vm_offset_t vtophys __P((vm_offset_t));
|
|
|
|
/* Machine-specific functions. */
|
|
void pmap_bootstrap __P((vm_offset_t ptaddr, u_int maxasn));
|
|
void pmap_emulate_reference __P((struct proc *p, vm_offset_t v,
|
|
int user, int write));
|
|
#ifdef _PMAP_MAY_USE_PROM_CONSOLE
|
|
int pmap_uses_prom_console __P((void));
|
|
#endif
|
|
|
|
#define pmap_pte_pa(pte) (PG_PFNUM(*(pte)) << PGSHIFT)
|
|
#define pmap_pte_prot(pte) (*(pte) & PG_PROT)
|
|
#define pmap_pte_w(pte) (*(pte) & PG_WIRED)
|
|
#define pmap_pte_v(pte) (*(pte) & PG_V)
|
|
#define pmap_pte_pv(pte) (*(pte) & PG_PVLIST)
|
|
#define pmap_pte_asm(pte) (*(pte) & PG_ASM)
|
|
|
|
#define pmap_pte_set_w(pte, v) \
|
|
do { \
|
|
if (v) \
|
|
*(pte) |= PG_WIRED; \
|
|
else \
|
|
*(pte) &= ~PG_WIRED; \
|
|
} while (0)
|
|
|
|
#define pmap_pte_w_chg(pte, nw) ((nw) ^ pmap_pte_w(pte))
|
|
|
|
#define pmap_pte_set_prot(pte, np) \
|
|
do { \
|
|
*(pte) &= ~PG_PROT; \
|
|
*(pte) |= (np); \
|
|
} while (0)
|
|
|
|
#define pmap_pte_prot_chg(pte, np) ((np) ^ pmap_pte_prot(pte))
|
|
|
|
static __inline pt_entry_t *pmap_l2pte __P((pmap_t, vm_offset_t));
|
|
static __inline pt_entry_t *pmap_l3pte __P((pmap_t, vm_offset_t));
|
|
|
|
#define pmap_l1pte(pmap, v) \
|
|
(&(pmap)->pm_lev1map[l1pte_index((vm_offset_t)(v))])
|
|
|
|
static __inline pt_entry_t *
|
|
pmap_l2pte(pmap, v)
|
|
pmap_t pmap;
|
|
vm_offset_t v;
|
|
{
|
|
pt_entry_t *l1pte, *lev2map;
|
|
|
|
l1pte = pmap_l1pte(pmap, v);
|
|
if (pmap_pte_v(l1pte) == 0)
|
|
return (NULL);
|
|
|
|
lev2map = (pt_entry_t *)ALPHA_PHYS_TO_K0SEG(pmap_pte_pa(l1pte));
|
|
return (&lev2map[l2pte_index(v)]);
|
|
}
|
|
|
|
static __inline pt_entry_t *
|
|
pmap_l3pte(pmap, v)
|
|
pmap_t pmap;
|
|
vm_offset_t v;
|
|
{
|
|
pt_entry_t *l1pte, *lev2map, *l2pte, *lev3map;
|
|
|
|
l1pte = pmap_l1pte(pmap, v);
|
|
if (pmap_pte_v(l1pte) == 0)
|
|
return (NULL);
|
|
|
|
lev2map = (pt_entry_t *)ALPHA_PHYS_TO_K0SEG(pmap_pte_pa(l1pte));
|
|
l2pte = &lev2map[l2pte_index(v)];
|
|
if (pmap_pte_v(l2pte) == 0)
|
|
return (NULL);
|
|
|
|
lev3map = (pt_entry_t *)ALPHA_PHYS_TO_K0SEG(pmap_pte_pa(l2pte));
|
|
return (&lev3map[l3pte_index(v)]);
|
|
}
|
|
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* _PMAP_MACHINE_ */
|