2c0680e659
Implement the protection check required by the pmap_extract_and_hold() specification. Remove the acquisition and release of Giant from pmap_extract_and_hold() and pmap_protect(). Many thanks to Ken Smith for resolving a sparc64-specific initialization problem in my original patch. Tested by: kensmith@
139 lines
4.3 KiB
C
139 lines
4.3 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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* 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 <sys/_lock.h>
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#include <sys/_mutex.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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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 mtx pm_mtx;
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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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#define PMAP_LOCK(pmap) mtx_lock(&(pmap)->pm_mtx)
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#define PMAP_LOCK_ASSERT(pmap, type) \
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mtx_assert(&(pmap)->pm_mtx, (type))
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#define PMAP_LOCK_DESTROY(pmap) mtx_destroy(&(pmap)->pm_mtx)
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#define PMAP_LOCK_INIT(pmap) mtx_init(&(pmap)->pm_mtx, "pmap", \
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NULL, MTX_DEF)
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#define PMAP_LOCKED(pmap) mtx_owned(&(pmap)->pm_mtx)
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#define PMAP_MTX(pmap) (&(pmap)->pm_mtx)
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#define PMAP_TRYLOCK(pmap) mtx_trylock(&(pmap)->pm_mtx)
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#define PMAP_UNLOCK(pmap) mtx_unlock(&(pmap)->pm_mtx)
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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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boolean_t pmap_page_is_mapped(vm_page_t m);
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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 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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