50e24eb628
the cpu dependent files. It will need to be done differently for USIII. - Simplify the logic for detecting context rollovers. Instead of dealing with it when the next context switch would cause the context numbers to rollover, deal with it when they actually do rollover. - Move some things around in cpu_switch so that we only do 1 membar #Sync when switching address space, instead of 2. - Detect kernel threads by comparing the new vm space to vmspace0, instead if checking if the tlb context is 0. - Removed some debug code.
133 lines
4.2 KiB
C
133 lines
4.2 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 <sys/queue.h>
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#include <machine/cache.h>
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#include <machine/tte.h>
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#define PMAP_CONTEXT_MAX 8192
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#define pmap_page_is_mapped(m) (!TAILQ_EMPTY(&(m)->md.tte_list))
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#define pmap_resident_count(pm) (pm->pm_stats.resident_count)
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typedef struct pmap *pmap_t;
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struct md_page {
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TAILQ_HEAD(, tte) tte_list;
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struct pmap *pmap;
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uint32_t colors[DCACHE_COLORS];
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int32_t color;
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uint32_t flags;
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};
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struct pmap {
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struct tte *pm_tsb;
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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[MAXCPU];
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struct pmap_statistics pm_stats;
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};
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void pmap_bootstrap(vm_offset_t ekva);
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vm_paddr_t pmap_kextract(vm_offset_t va);
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void pmap_kenter(vm_offset_t va, vm_page_t m);
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void pmap_kremove(vm_offset_t);
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void pmap_kenter_flags(vm_offset_t va, vm_paddr_t pa, u_long flags);
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void pmap_kremove_flags(vm_offset_t va);
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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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int pmap_remove_tte(struct pmap *pm1, struct pmap *pm2, struct tte *tp,
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vm_offset_t va);
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int pmap_protect_tte(struct pmap *pm1, struct pmap *pm2, struct tte *tp,
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vm_offset_t va);
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void pmap_map_tsb(void);
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void pmap_clear_write(vm_page_t m);
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#define vtophys(va) pmap_kextract(((vm_offset_t)(va)))
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extern vm_paddr_t avail_start;
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extern vm_paddr_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_paddr_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_paddr_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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#ifdef PMAP_STATS
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SYSCTL_DECL(_debug_pmap_stats);
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#define PMAP_STATS_VAR(name) \
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static long name; \
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SYSCTL_LONG(_debug_pmap_stats, OID_AUTO, name, CTLFLAG_RW, \
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&name, 0, "")
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#define PMAP_STATS_INC(var) \
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atomic_add_long(&var, 1)
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#else
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#define PMAP_STATS_VAR(name)
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#define PMAP_STATS_INC(var)
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#endif
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#endif /* !_MACHINE_PMAP_H_ */
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