/*-
 * 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.
 * 3. 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.
 */

#ifndef _MACHINE_PMAP_H_
#define _MACHINE_PMAP_H_

#include <machine/pte.h>

#ifndef LOCORE

#include <sys/queue.h>
#include <sys/_cpuset.h>
#include <sys/_lock.h>
#include <sys/_mutex.h>
#include <sys/_pv_entry.h>

#include <vm/_vm_radix.h>

#ifdef _KERNEL

#define vtophys(va)     pmap_kextract((vm_offset_t)(va))

#endif

#define pmap_page_get_memattr(m)        ((m)->md.pv_memattr)
#define pmap_page_is_write_mapped(m)    (((m)->a.flags & PGA_WRITEABLE) != 0)
void pmap_page_set_memattr(vm_page_t m, vm_memattr_t ma);
#define pmap_map_delete(pmap, sva, eva) pmap_remove(pmap, sva, eva)

/*
 * Pmap stuff
 */

struct md_page {
        TAILQ_HEAD(,pv_entry)   pv_list;
        int                     pv_gen;
        vm_memattr_t            pv_memattr;
};

enum pmap_stage {
        PM_INVALID,
        PM_STAGE1,
        PM_STAGE2,
};

struct pmap {
        struct mtx              pm_mtx;
        struct pmap_statistics  pm_stats;       /* pmap statictics */
        pd_entry_t              *pm_top;        /* top-level page table page */
        u_long                  pm_satp;        /* value for SATP register */
        cpuset_t                pm_active;      /* active on cpus */
        TAILQ_HEAD(,pv_chunk)   pm_pvchunk;     /* list of mappings in pmap */
        LIST_ENTRY(pmap)        pm_list;        /* List of all pmaps */
        struct vm_radix         pm_root;
        enum pmap_stage         pm_stage;
};

typedef struct pmap *pmap_t;

#ifdef _KERNEL
extern struct pmap      kernel_pmap_store;
#define kernel_pmap     (&kernel_pmap_store)
#define pmap_kernel()   kernel_pmap

#define PMAP_ASSERT_LOCKED(pmap) \
                                mtx_assert(&(pmap)->pm_mtx, MA_OWNED)
#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_OWNED(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 vm_offset_t virtual_avail;
extern vm_offset_t virtual_end;

/*
 * Macros to test if a mapping is mappable with an L1 Section mapping
 * or an L2 Large Page mapping.
 */
#define L1_MAPPABLE_P(va, pa, size)                                     \
        ((((va) | (pa)) & L1_OFFSET) == 0 && (size) >= L1_SIZE)

enum pmap_mode {
        PMAP_MODE_SV39,
        PMAP_MODE_SV48,
};

extern enum pmap_mode pmap_mode;

/* Check if an address resides in a mappable region. */
#define VIRT_IS_VALID(va)                                               \
        ((va) < (pmap_mode == PMAP_MODE_SV39 ? VM_MAX_USER_ADDRESS_SV39 : \
            VM_MAX_USER_ADDRESS_SV48) || (va) >= VM_MIN_KERNEL_ADDRESS)

struct thread;

#define pmap_vm_page_alloc_check(m)

void    pmap_activate_boot(pmap_t);
void    pmap_activate_sw(struct thread *);
void    pmap_bootstrap(vm_paddr_t, vm_size_t);
int     pmap_change_attr(void *va, vm_size_t size, int mode);
void    pmap_kenter(vm_offset_t sva, vm_size_t size, vm_paddr_t pa, int mode);
void    pmap_kenter_device(vm_offset_t, vm_size_t, vm_paddr_t);
vm_paddr_t pmap_kextract(vm_offset_t va);
void    pmap_kremove(vm_offset_t);
void    pmap_kremove_device(vm_offset_t, vm_size_t);
void    *pmap_mapdev_attr(vm_paddr_t pa, vm_size_t size, vm_memattr_t ma);
int     pmap_pinit_stage(pmap_t, enum pmap_stage);
bool    pmap_page_is_mapped(vm_page_t m);
bool    pmap_ps_enabled(pmap_t);

void    *pmap_mapdev(vm_paddr_t, vm_size_t);
void    *pmap_mapbios(vm_paddr_t, vm_size_t);
void    pmap_unmapdev(void *, vm_size_t);
void    pmap_unmapbios(void *, vm_size_t);

bool    pmap_map_io_transient(vm_page_t *, void **, int, bool);
void    pmap_unmap_io_transient(vm_page_t *, void **, int, bool);

bool    pmap_get_tables(pmap_t, vm_offset_t, pd_entry_t **, pd_entry_t **,
    pt_entry_t **);

int     pmap_fault(pmap_t, vm_offset_t, vm_prot_t);

static inline int
pmap_vmspace_copy(pmap_t dst_pmap __unused, pmap_t src_pmap __unused)
{

        return (0);
}

#endif  /* _KERNEL */

#endif  /* !LOCORE */

#endif  /* !_MACHINE_PMAP_H_ */