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/*
* Copyright (c) 1991 Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department and William Jolitz of UUNET Technologies Inc.
*
* 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.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 THE REGENTS 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.
*
* Derived from hp300 version by Mike Hibler, this version by William
* Jolitz uses a recursive map [a pde points to the page directory] to
* map the page tables using the pagetables themselves. This is done to
* reduce the impact on kernel virtual memory for lots of sparse address
* space, and to reduce the cost of memory to each process.
*
* from: hp300: @(#)pmap.h 7.2 (Berkeley) 12/16/90
* from: @(#)pmap.h 7.4 (Berkeley) 5/12/91
* from: i386 pmap.h,v 1.54 1997/11/20 19:30:35 bde Exp
* $FreeBSD$
*/
#ifndef _MACHINE_PMAP_H_
#define _MACHINE_PMAP_H_
#include <sys/queue.h>
#include <machine/pte.h>
#ifdef _KERNEL
#ifndef NKPT
#define NKPT 30 /* initial number of kernel page tables */
#endif
#define MAXKPT (PAGE_SIZE/sizeof(vm_offset_t))
#define vtophys(va) pmap_kextract(((vm_offset_t) (va)))
#endif /* _KERNEL */
/*
* Pmap stuff
*/
struct pv_entry;
struct md_page {
int pv_list_count;
TAILQ_HEAD(,pv_entry) pv_list;
};
struct pmap {
TAILQ_HEAD(,pv_entry) pm_pvlist; /* list of mappings in pmap */
u_int32_t pm_rid[5]; /* base RID for pmap */
int pm_flags; /* pmap flags */
int pm_active; /* active flag */
struct pmap_statistics pm_stats; /* pmap statistics */
struct vm_page *pm_ptphint; /* pmap ptp hint */
};
#define pmap_page_is_mapped(m) (!TAILQ_EMPTY(&(m)->md.pv_list))
#define PM_FLAG_LOCKED 0x1
#define PM_FLAG_WANTED 0x2
typedef struct pmap *pmap_t;
#ifdef _KERNEL
extern struct pmap kernel_pmap_store;
#define kernel_pmap (&kernel_pmap_store)
#endif
/*
* 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 {
pmap_t pv_pmap; /* pmap where mapping lies */
vm_offset_t pv_va; /* virtual address for mapping */
TAILQ_ENTRY(pv_entry) pv_list;
TAILQ_ENTRY(pv_entry) pv_plist;
} *pv_entry_t;
#ifdef _KERNEL
extern vm_offset_t phys_avail[];
extern vm_offset_t virtual_avail;
extern vm_offset_t virtual_end;
vm_offset_t pmap_steal_memory(vm_size_t);
void pmap_bootstrap(void);
void pmap_kenter(vm_offset_t va, vm_offset_t pa);
vm_paddr_t pmap_kextract(vm_offset_t va);
void pmap_kremove(vm_offset_t);
void pmap_setdevram(unsigned long long basea, vm_offset_t sizea);
int pmap_uses_prom_console(void);
void *pmap_mapdev(vm_offset_t, vm_size_t);
void pmap_unmapdev(vm_offset_t, vm_size_t);
unsigned *pmap_pte(pmap_t, vm_offset_t) __pure2;
void pmap_set_opt (unsigned *);
void pmap_set_opt_bsp (void);
struct pmap *pmap_switch(struct pmap *pmap);
#endif /* _KERNEL */
#endif /* !_MACHINE_PMAP_H_ */
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