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/* $NetBSD: pmap.h,v 1.3 1996/03/14 23:11:29 mark Exp $ */
/*
* Copyright (c) 1994,1995 Mark Brinicombe.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the RiscBSD team.
* 4. The name "RiscBSD" nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY RISCBSD ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL RISCBSD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _ARM32_PMAP_H_
#define _ARM32_PMAP_H_
#include <machine/pte.h>
/*
* virtual address to page table entry and
* to physical address.
*/
#define vtopte(va) \
((pt_entry_t *)(PROCESS_PAGE_TBLS_BASE + (arm_byte_to_page((unsigned int)(va)) << 2)))
#define vtophys(va) \
((*vtopte(va) & PG_FRAME) | ((unsigned int)(va) & ~PG_FRAME))
/*
* Pmap stuff
*/
struct pmap {
pd_entry_t *pm_pdir; /* KVA of page directory */
vm_offset_t pm_pptpt; /* PA of pt's page table */
vm_offset_t pm_vptpt; /* VA of pt's page table */
boolean_t pm_pdchanged; /* pdir changed */
short pm_dref; /* page directory ref count */
short pm_count; /* pmap reference count */
simple_lock_data_t pm_lock; /* lock on pmap */
struct pmap_statistics pm_stats; /* pmap statistics */
};
typedef struct pmap *pmap_t;
/*
* For speed we store the both the virtual address and the page table
* entry address for each page hook.
*/
typedef struct {
vm_offset_t va;
pt_entry_t *pte;
} pagehook_t;
/*
* For each vm_page_t, there is a list of all currently valid virtual
* mappings of that page. An entry is a pv_entry_t, the list is pv_table.
*/
typedef struct pv_entry {
struct pv_entry *pv_next; /* next pv_entry */
pmap_t pv_pmap; /* pmap where mapping lies */
vm_offset_t pv_va; /* virtual address for mapping */
int pv_flags; /* flags */
} *pv_entry_t;
struct pv_page;
struct pv_page_info {
TAILQ_ENTRY(pv_page) pgi_list;
struct pv_entry *pgi_freelist;
int pgi_nfree;
};
/*
* This is basically:
* ((NBPG - sizeof(struct pv_page_info)) / sizeof(struct pv_entry))
*/
#define NPVPPG ((NBPG - sizeof(struct pv_page_info)) / sizeof(struct pv_entry))
struct pv_page {
struct pv_page_info pvp_pgi;
struct pv_entry pvp_pv[NPVPPG];
};
#ifdef _KERNEL
pv_entry_t pv_table; /* array of entries, one per page */
extern pmap_t kernel_pmap;
extern struct pmap kernel_pmap_store;
#define pmap_kernel() (&kernel_pmap_store)
#define pmap_update() tlbflush()
#define pmap_resident_count(pmap) ((pmap)->pm_stats.resident_count)
boolean_t pmap_testbit __P((vm_offset_t, int));
void pmap_changebit __P((vm_offset_t, int, int));
static __inline vm_offset_t
pmap_phys_address(int ppn)
{
return(arm_page_to_byte(ppn));
}
#endif
#endif
/* End of pmap.h */
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