e933237d37
This supports all hardware page sizes (8K, 64K, 512K, 4MB), but only 8k pages are actually used as of yet.
87 lines
3.1 KiB
C
87 lines
3.1 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_PAGES_SHIFT (4)
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#define TSB_PAGES (1 << TSB_PAGES_SHIFT)
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#define TSB_BSHIFT (TSB_PAGES_SHIFT + PAGE_SHIFT)
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#define TSB_BSIZE (1UL << TSB_BSHIFT)
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#define TSB_SIZE (TSB_BSIZE / sizeof(struct tte))
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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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(TSB_BSHIFT - TSB_BUCKET_SHIFT - TTE_SHIFT)
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#define TSB_BUCKET_MASK ((1 << TSB_BUCKET_ADDRESS_BITS) - 1)
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extern struct tte *tsb_kernel;
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extern vm_size_t tsb_kernel_mask;
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extern vm_size_t tsb_kernel_size;
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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, u_long sz, vm_offset_t va)
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{
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return (tsb_vpntobucket(pm, va >> TTE_PAGE_SHIFT(sz)));
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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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typedef int (tsb_callback_t)(struct pmap *, struct pmap *, struct tte *,
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vm_offset_t);
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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, u_long sz,
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u_long data);
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void tsb_tte_local_remove(struct tte *tp);
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void tsb_foreach(pmap_t pm1, pmap_t pm2, vm_offset_t start, vm_offset_t end,
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tsb_callback_t *callback);
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#endif /* !_MACHINE_TSB_H_ */
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