133 lines
4.0 KiB
C
133 lines
4.0 KiB
C
/* $NetBSD: pmap.h,v 1.4 1996/10/15 00:09:09 mark Exp $ */
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/*
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* Copyright (c) 1994,1995 Mark Brinicombe.
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* 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. 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 RiscBSD team.
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* 4. The name "RiscBSD" nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY RISCBSD ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL RISCBSD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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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#ifndef _ARM32_PMAP_H_
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#define _ARM32_PMAP_H_
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#include <machine/pte.h>
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/*
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* virtual address to page table entry and
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* to physical address.
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*/
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#define vtopte(va) \
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((pt_entry_t *)(PROCESS_PAGE_TBLS_BASE + (arm_byte_to_page((unsigned int)(va)) << 2)))
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#define vtophys(va) \
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((*vtopte(va) & PG_FRAME) | ((unsigned int)(va) & ~PG_FRAME))
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/*
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* Pmap stuff
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*/
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struct pmap {
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pd_entry_t *pm_pdir; /* KVA of page directory */
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vm_offset_t pm_pptpt; /* PA of pt's page table */
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vm_offset_t pm_vptpt; /* VA of pt's page table */
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boolean_t pm_pdchanged; /* pdir changed */
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short pm_dref; /* page directory ref count */
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short pm_count; /* pmap reference count */
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simple_lock_data_t pm_lock; /* lock on pmap */
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struct pmap_statistics pm_stats; /* pmap statistics */
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};
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typedef struct pmap *pmap_t;
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/*
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* For speed we store the both the virtual address and the page table
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* entry address for each page hook.
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*/
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typedef struct {
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vm_offset_t va;
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pt_entry_t *pte;
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} pagehook_t;
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/*
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* For each vm_page_t, there is a list of all currently valid virtual
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* mappings of that page. An entry is a pv_entry_t, the list is pv_table.
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*/
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typedef struct pv_entry {
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struct pv_entry *pv_next; /* next pv_entry */
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pmap_t pv_pmap; /* pmap where mapping lies */
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vm_offset_t pv_va; /* virtual address for mapping */
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int pv_flags; /* flags */
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} *pv_entry_t;
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struct pv_page;
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struct pv_page_info {
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TAILQ_ENTRY(pv_page) pgi_list;
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struct pv_entry *pgi_freelist;
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int pgi_nfree;
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};
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/*
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* This is basically:
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* ((NBPG - sizeof(struct pv_page_info)) / sizeof(struct pv_entry))
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*/
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#define NPVPPG ((NBPG - sizeof(struct pv_page_info)) / sizeof(struct pv_entry))
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struct pv_page {
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struct pv_page_info pvp_pgi;
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struct pv_entry pvp_pv[NPVPPG];
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};
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#ifdef _KERNEL
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pv_entry_t pv_table; /* array of entries, one per page */
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extern pmap_t kernel_pmap;
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extern struct pmap kernel_pmap_store;
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#define pmap_kernel() (&kernel_pmap_store)
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#define pmap_update() tlb_flush()
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#define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count)
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boolean_t pmap_testbit __P((vm_offset_t, int));
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void pmap_changebit __P((vm_offset_t, int, int));
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static __inline vm_offset_t
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pmap_phys_address(int ppn)
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{
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return(arm_page_to_byte(ppn));
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}
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#endif
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#endif
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/* End of pmap.h */
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