624eb79821
much less magic, fragile, broken. Use ttes rather than sttes. We still use the replacement scheme used by the original code, which is pretty cool. Many crucial bug fixes from: tmm
80 lines
2.8 KiB
C
80 lines
2.8 KiB
C
/*-
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* Copyright (c) 1997 Berkeley Software Design, Inc. All rights reserved.
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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. Berkeley Software Design Inc's name may not be used to endorse or
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* promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``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 BERKELEY SOFTWARE DESIGN INC 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: BSDI: pmap.v9.h,v 1.10.2.6 1999/08/23 22:18:44 cp Exp
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* $FreeBSD$
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*/
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#ifndef _MACHINE_TSB_H_
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#define _MACHINE_TSB_H_
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#define TSB_BUCKET_SHIFT (2)
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#define TSB_BUCKET_SIZE (1 << TSB_BUCKET_SHIFT)
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#define TSB_BUCKET_ADDRESS_BITS \
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(PAGE_SHIFT_8K - TSB_BUCKET_SHIFT - TTE_SHIFT)
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#define TSB_BUCKET_MASK ((1 << TSB_BUCKET_ADDRESS_BITS) - 1)
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#define TSB_KERNEL_SIZE \
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((KVA_PAGES * PAGE_SIZE_4M) / sizeof(struct tte))
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#define TSB_KERNEL_MASK (TSB_KERNEL_SIZE - 1)
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#define TSB_KERNEL_VA_MASK (TSB_KERNEL_MASK << TTE_SHIFT)
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extern struct tte *tsb_kernel;
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extern vm_offset_t tsb_kernel_phys;
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static __inline struct tte *
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tsb_vpntobucket(pmap_t pm, vm_offset_t vpn)
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{
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return (&pm->pm_tsb[(vpn & TSB_BUCKET_MASK) << TSB_BUCKET_SHIFT]);
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}
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static __inline struct tte *
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tsb_vtobucket(pmap_t pm, vm_offset_t va)
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{
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return (tsb_vpntobucket(pm, va >> PAGE_SHIFT));
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}
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static __inline struct tte *
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tsb_kvpntotte(vm_offset_t vpn)
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{
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return (&tsb_kernel[vpn & TSB_KERNEL_MASK]);
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}
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static __inline struct tte *
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tsb_kvtotte(vm_offset_t va)
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{
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return (tsb_kvpntotte(va >> PAGE_SHIFT));
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}
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struct tte *tsb_tte_lookup(pmap_t pm, vm_offset_t va);
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void tsb_tte_remove(struct tte *stp);
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struct tte *tsb_tte_enter(pmap_t pm, vm_page_t m, vm_offset_t va,
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struct tte tte);
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void tsb_tte_local_remove(struct tte *tp);
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#endif /* !_MACHINE_TSB_H_ */
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