62ec4add59
substantial fraction of the number of entries of tte's in the tsb would need to be looked up, traverse the tsb instead. This is crucial in some places, e.g. when swapping out a process, where a certain pmap_remove() call would take very long time to complete without this. 2. Implement pmap_qenter_flags(), which will become used later 3. Reactivate the instruction cache flush done when mapping as executable. This is required e.g. when executing files via NFS, but is known to cause problems on UltraSPARC-IIe CPU's. If you have such a CPU, you will need to comment this call out for now. Submitted by: jake (3)
120 lines
4.0 KiB
C
120 lines
4.0 KiB
C
/*
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* Copyright (c) 1991 Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department and William Jolitz of UUNET Technologies Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: hp300: @(#)pmap.h 7.2 (Berkeley) 12/16/90
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* from: @(#)pmap.h 7.4 (Berkeley) 5/12/91
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* from: FreeBSD: src/sys/i386/include/pmap.h,v 1.70 2000/11/30
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* $FreeBSD$
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*/
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#ifndef _MACHINE_PMAP_H_
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#define _MACHINE_PMAP_H_
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#include <machine/tte.h>
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#define DCACHE_COLOR_BITS (1)
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#define DCACHE_COLORS (1 << DCACHE_COLOR_BITS)
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#define DCACHE_COLOR_MASK (DCACHE_COLORS - 1)
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#define DCACHE_COLOR(va) (((va) >> PAGE_SHIFT) & DCACHE_COLOR_MASK)
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#define PMAP_CONTEXT_MAX 8192
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#define pmap_resident_count(pm) (pm->pm_stats.resident_count)
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struct pv_entry;
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typedef struct pmap *pmap_t;
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typedef struct pv_entry *pv_entry_t;
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struct md_page {
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TAILQ_HEAD(, pv_entry) pv_list;
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int pv_list_count;
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int colors[DCACHE_COLORS];
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};
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struct pmap {
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TAILQ_HEAD(,pv_entry) pm_pvlist;
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struct tte *pm_tsb;
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struct tte *pm_tsb_tte;
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vm_object_t pm_tsb_obj;
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u_int pm_active;
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u_int pm_context;
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u_int pm_count;
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struct pmap_statistics pm_stats;
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};
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struct pv_entry {
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TAILQ_ENTRY(pv_entry) pv_list;
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TAILQ_ENTRY(pv_entry) pv_plist;
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pmap_t pv_pmap;
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vm_offset_t pv_va;
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vm_page_t pv_m;
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};
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void pmap_bootstrap(vm_offset_t ekva);
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vm_offset_t pmap_kextract(vm_offset_t va);
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void pmap_kenter_flags(vm_offset_t va, vm_offset_t pa, u_long flags);
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void pmap_qenter_flags(vm_offset_t va, vm_page_t *m, int count, u_long fl);
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int pmap_cache_enter(vm_page_t m, vm_offset_t va);
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void pmap_cache_remove(vm_page_t m, vm_offset_t va);
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#define vtophys(va) pmap_kextract(((vm_offset_t) (va)))
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extern vm_offset_t avail_start;
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extern vm_offset_t avail_end;
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extern struct pmap kernel_pmap_store;
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#define kernel_pmap (&kernel_pmap_store)
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extern vm_offset_t phys_avail[];
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extern vm_offset_t virtual_avail;
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extern vm_offset_t virtual_end;
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extern vm_offset_t kernel_page;
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extern int pmap_pagedaemon_waken;
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extern vm_offset_t msgbuf_phys;
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static __inline int
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pmap_track_modified(pmap_t pm, vm_offset_t va)
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{
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if (pm == kernel_pmap)
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return ((va < kmi.clean_sva) || (va >= kmi.clean_eva));
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else
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return (1);
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}
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#endif /* !_MACHINE_PMAP_H_ */
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