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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2014,2016 Svatopluk Kraus <onwahe@gmail.com>
* Copyright (c) 2014,2016 Michal Meloun <meloun@miracle.cz>
* 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.
*
* 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.
*
* The ARM version of this file was more or less based on the i386 version,
* which has the following provenance...
*
* 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: FreeBSD: src/sys/i386/include/pmap.h,v 1.70 2000/11/30
*
* $FreeBSD$
*/
#ifndef _MACHINE_PMAP_H_
#define _MACHINE_PMAP_H_
#include <sys/systm.h>
#include <sys/queue.h>
#include <sys/_cpuset.h>
#include <sys/_lock.h>
#include <sys/_mutex.h>
#include <sys/_pv_entry.h>
typedef uint32_t pt1_entry_t; /* L1 table entry */
typedef uint32_t pt2_entry_t; /* L2 table entry */
typedef uint32_t ttb_entry_t; /* TTB entry */
#ifdef _KERNEL
#if 0
#define PMAP_PTE_NOCACHE // Use uncached page tables
#endif
/*
* (1) During pmap bootstrap, physical pages for L2 page tables are
* allocated in advance which are used for KVA continuous mapping
* starting from KERNBASE. This makes things more simple.
* (2) During vm subsystem initialization, only vm subsystem itself can
* allocate physical memory safely. As pmap_map() is called during
* this initialization, we must be prepared for that and have some
* preallocated physical pages for L2 page tables.
*
* Note that some more pages for L2 page tables are preallocated too
* for mappings laying above VM_MAX_KERNEL_ADDRESS.
*/
#ifndef NKPT2PG
/*
* The optimal way is to define this in board configuration as
* definition here must be safe enough. It means really big.
*
* 1 GB KVA <=> 256 kernel L2 page table pages
*
* From real platforms:
* 1 GB physical memory <=> 10 pages is enough
* 2 GB physical memory <=> 21 pages is enough
*/
#define NKPT2PG 32
#endif
#endif /* _KERNEL */
/*
* Pmap stuff
*/
struct md_page {
TAILQ_HEAD(,pv_entry) pv_list;
uint16_t pt2_wirecount[4];
vm_memattr_t pat_mode;
};
struct pmap {
struct mtx pm_mtx;
pt1_entry_t *pm_pt1; /* KVA of pt1 */
pt2_entry_t *pm_pt2tab; /* KVA of pt2 pages table */
TAILQ_HEAD(,pv_chunk) pm_pvchunk; /* list of mappings in pmap */
cpuset_t pm_active; /* active on cpus */
struct pmap_statistics pm_stats; /* pmap statictics */
LIST_ENTRY(pmap) pm_list; /* List of all pmaps */
};
typedef struct pmap *pmap_t;
#ifdef _KERNEL
extern struct pmap kernel_pmap_store;
#define kernel_pmap (&kernel_pmap_store)
#define PMAP_LOCK(pmap) mtx_lock(&(pmap)->pm_mtx)
#define PMAP_LOCK_ASSERT(pmap, type) \
mtx_assert(&(pmap)->pm_mtx, (type))
#define PMAP_LOCK_DESTROY(pmap) mtx_destroy(&(pmap)->pm_mtx)
#define PMAP_LOCK_INIT(pmap) mtx_init(&(pmap)->pm_mtx, "pmap", \
NULL, MTX_DEF | MTX_DUPOK)
#define PMAP_LOCKED(pmap) mtx_owned(&(pmap)->pm_mtx)
#define PMAP_MTX(pmap) (&(pmap)->pm_mtx)
#define PMAP_TRYLOCK(pmap) mtx_trylock(&(pmap)->pm_mtx)
#define PMAP_UNLOCK(pmap) mtx_unlock(&(pmap)->pm_mtx)
extern ttb_entry_t pmap_kern_ttb; /* TTB for kernel pmap */
#define pmap_page_get_memattr(m) ((m)->md.pat_mode)
/*
* Only the following functions or macros may be used before pmap_bootstrap()
* is called: pmap_kenter(), pmap_kextract(), pmap_kremove(), vtophys(), and
* vtopte2().
*/
void pmap_bootstrap(vm_offset_t);
void pmap_kenter(vm_offset_t, vm_paddr_t);
void pmap_kremove(vm_offset_t);
boolean_t pmap_page_is_mapped(vm_page_t);
bool pmap_ps_enabled(pmap_t pmap);
void pmap_tlb_flush(pmap_t, vm_offset_t);
void pmap_tlb_flush_range(pmap_t, vm_offset_t, vm_size_t);
vm_paddr_t pmap_dump_kextract(vm_offset_t, pt2_entry_t *);
int pmap_fault(pmap_t, vm_offset_t, uint32_t, int, bool);
void pmap_set_tex(void);
/*
* Pre-bootstrap epoch functions set.
*/
void pmap_bootstrap_prepare(vm_paddr_t);
vm_paddr_t pmap_preboot_get_pages(u_int);
void pmap_preboot_map_pages(vm_paddr_t, vm_offset_t, u_int);
vm_offset_t pmap_preboot_reserve_pages(u_int);
vm_offset_t pmap_preboot_get_vpages(u_int);
void pmap_preboot_map_attr(vm_paddr_t, vm_offset_t, vm_size_t, vm_prot_t,
vm_memattr_t);
void pmap_remap_vm_attr(vm_memattr_t old_attr, vm_memattr_t new_attr);
extern char *_tmppt; /* poor name! */
extern vm_offset_t virtual_avail;
extern vm_offset_t virtual_end;
void *pmap_kenter_temporary(vm_paddr_t, int);
#define pmap_page_is_write_mapped(m) (((m)->a.flags & PGA_WRITEABLE) != 0)
void pmap_page_set_memattr(vm_page_t, vm_memattr_t);
#define pmap_map_delete(pmap, sva, eva) pmap_remove(pmap, sva, eva)
void *pmap_mapdev(vm_paddr_t, vm_size_t);
void pmap_unmapdev(void *, vm_size_t);
static inline void *
pmap_mapdev_attr(vm_paddr_t addr __unused, vm_size_t size __unused,
int attr __unused)
{
panic("%s is not implemented yet!\n", __func__);
}
struct pcb;
void pmap_set_pcb_pagedir(pmap_t, struct pcb *);
void pmap_kenter_device(vm_offset_t, vm_size_t, vm_paddr_t);
void pmap_kremove_device(vm_offset_t, vm_size_t);
vm_paddr_t pmap_kextract(vm_offset_t);
#define vtophys(va) pmap_kextract((vm_offset_t)(va))
static inline int
pmap_vmspace_copy(pmap_t dst_pmap __unused, pmap_t src_pmap __unused)
{
return (0);
}
#define PMAP_ENTER_QUICK_LOCKED 0x10000000
#define pmap_vm_page_alloc_check(m)
#endif /* _KERNEL */
#endif /* !_MACHINE_PMAP_H_ */
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