mirror of
https://codeberg.org/ziglang/zig.git
synced 2025-12-06 13:54:21 +00:00
553cb3ed46
sys/param.h was manually adjusted to not define __NetBSD_Version__ since it will be defined by the compiler.
103 lines
No EOL
2.9 KiB
C
Vendored
103 lines
No EOL
2.9 KiB
C
Vendored
/* $NetBSD: pmap_pv.h,v 1.17 2020/03/17 22:29:19 ad Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c)2008 YAMAMOTO Takashi,
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 _X86_PMAP_PV_H_
|
|
#define _X86_PMAP_PV_H_
|
|
|
|
#include <sys/mutex.h>
|
|
#include <sys/queue.h>
|
|
#include <sys/rbtree.h>
|
|
|
|
struct vm_page;
|
|
struct pmap_page;
|
|
|
|
/*
|
|
* structures to track P->V mapping
|
|
*
|
|
* this file is intended to be minimum as it's included by <machine/vmparam.h>.
|
|
*/
|
|
|
|
/*
|
|
* pv_pte: describe a pte
|
|
*/
|
|
|
|
struct pv_pte {
|
|
struct vm_page *pte_ptp; /* PTP; NULL for pmap_kernel() */
|
|
vaddr_t pte_va; /* VA */
|
|
};
|
|
|
|
/*
|
|
* pv_entry: plug pv_pte into lists. 32 bytes on i386, 64 on amd64.
|
|
*/
|
|
|
|
struct pv_entry {
|
|
struct pv_pte pve_pte; /* should be the first member */
|
|
LIST_ENTRY(pv_entry) pve_list; /* on pmap_page::pp_pvlist */
|
|
rb_node_t pve_rb; /* red-black tree node */
|
|
struct pmap_page *pve_pp; /* backpointer to mapped page */
|
|
};
|
|
#define pve_next pve_list.le_next
|
|
|
|
/*
|
|
* pmap_page: a structure which is embedded in each vm_page.
|
|
*/
|
|
|
|
struct pmap_page {
|
|
union {
|
|
/* PTPs */
|
|
rb_tree_t rb;
|
|
|
|
/* PTPs, when being freed */
|
|
LIST_ENTRY(vm_page) link;
|
|
|
|
/* Non-PTPs (i.e. normal pages) */
|
|
struct {
|
|
struct pv_pte pte;
|
|
LIST_HEAD(, pv_entry) pvlist;
|
|
uint8_t attrs;
|
|
} s;
|
|
} pp_u;
|
|
kmutex_t pp_lock;
|
|
#define pp_rb pp_u.rb
|
|
#define pp_link pp_u.link
|
|
#define pp_pte pp_u.s.pte
|
|
#define pp_pvlist pp_u.s.pvlist
|
|
#define pp_attrs pp_u.s.attrs
|
|
};
|
|
|
|
#define PP_ATTRS_D 0x01 /* Dirty */
|
|
#define PP_ATTRS_A 0x02 /* Accessed */
|
|
#define PP_ATTRS_W 0x04 /* Writable */
|
|
|
|
#define PMAP_PAGE_INIT(pp) \
|
|
do { \
|
|
LIST_INIT(&(pp)->pp_pvlist); \
|
|
mutex_init(&(pp)->pp_lock, MUTEX_NODEBUG, IPL_VM); \
|
|
} while (/* CONSTCOND */ 0);
|
|
|
|
#endif /* !_X86_PMAP_PV_H_ */ |