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/* $OpenBSD: pmap.h,v 1.8 2014/01/30 18:16:41 miod Exp $ */
/*
* Copyright (c) 2005, Miodrag Vallat
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 _MACHINE_PMAP_H_
#define _MACHINE_PMAP_H_
#include <machine/pte.h>
/*
* PMAP structure
*/
struct pmap {
pd_entry_t *pm_segtab; /* first level table */
paddr_t pm_psegtab; /* pa of above */
int pm_refcount; /* reference count */
struct simplelock pm_lock;
struct pmap_statistics pm_stats; /* pmap statistics */
};
typedef struct pmap *pmap_t;
/*
* Extra constants passed in the low bits of pa in pmap_enter() to
* request specific memory attributes.
*/
#define PMAP_NC 1
#define PMAP_OBIO PMAP_NC
#define PMAP_BWS 2
/*
* Macro to pass iospace bits in the low bits of pa in pmap_enter().
* Provided for source code compatibility - we don't need such bits.
*/
#define PMAP_IOENC(x) 0
#ifdef _KERNEL
extern struct pmap kernel_pmap_store;
#define kvm_recache(addr, npages) kvm_setcache(addr, npages, 1)
#define kvm_uncache(addr, npages) kvm_setcache(addr, npages, 0)
#define pmap_copy(a,b,c,d,e) do { /* nothing */ } while (0)
#define pmap_deactivate(p) do { /* nothing */ } while (0)
#define pmap_kernel() (&kernel_pmap_store)
#define pmap_resident_count(p) ((p)->pm_stats.resident_count)
#define pmap_update(p) do { /* nothing */ } while (0)
#define pmap_wired_count(p) ((p)->pm_stats.wired_count)
#define pmap_remove_holes(map) do { /* nothing */ } while (0)
#define PMAP_PREFER(fo, ap) pmap_prefer((fo), (ap))
struct proc;
void kvm_setcache(caddr_t, int, int);
void switchexit(struct proc *); /* locore.s */
void pmap_bootstrap(size_t);
void pmap_cache_enable(void);
void pmap_changeprot(pmap_t, vaddr_t, vm_prot_t, int);
vaddr_t pmap_map(vaddr_t, paddr_t, paddr_t, int);
int pmap_pa_exists(paddr_t);
vaddr_t pmap_prefer(vaddr_t, vaddr_t);
void pmap_release(pmap_t);
void pmap_redzone(void);
void pmap_virtual_space(vaddr_t *, vaddr_t *);
void pmap_writetext(unsigned char *, int);
#endif /* _KERNEL */
struct pvlist {
struct pvlist *pv_next; /* next pvlist, if any */
struct pmap *pv_pmap; /* pmap of this va */
vaddr_t pv_va; /* virtual address */
int pv_flags; /* flags (below) */
};
struct vm_page_md {
struct pvlist pv_head;
};
#define VM_MDPAGE_INIT(pg) do { \
(pg)->mdpage.pv_head.pv_next = NULL; \
(pg)->mdpage.pv_head.pv_pmap = NULL; \
(pg)->mdpage.pv_head.pv_va = 0; \
(pg)->mdpage.pv_head.pv_flags = 0; \
} while (0)
#endif /* _MACHINE_PMAP_H_ */
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