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/*
* Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
* 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.
* 3. Neither the name of Hyra 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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 _VM_MMAP_H_
#define _VM_MMAP_H_
#include <sys/types.h>
#include <sys/cdefs.h>
#include <sys/queue.h>
#include <sys/syscall.h>
#include <sys/spinlock.h>
#include <vm/pmap.h>
#include <vm/vm.h>
#define MAP_SHARED 0x0001
#define MAP_PRIVATE 0x0002
#define MAP_ANONYMOUS 0x0010
#define MAP_FAILED ((void *)-1)
/* Memory map table entry count */
#define MTAB_ENTRIES 32
struct vm_object;
struct vm_mapping {
TAILQ_ENTRY(vm_mapping) link;
struct vm_range range;
struct vm_object *vmobj;
paddr_t physmem_base;
vm_prot_t prot;
/* Private */
size_t vhash; /* Virtual address hash */
};
typedef TAILQ_HEAD(, vm_mapping) vm_mapq_t;
struct vm_mapspace {
vm_mapq_t mtab[MTAB_ENTRIES]; /* Map table */
size_t map_count;
};
int vm_map_create(struct vas vas, vaddr_t va, paddr_t pa, vm_prot_t prot,
size_t bytes);
int vm_map_destroy(struct vas vas, vaddr_t va, size_t bytes);
uint64_t sys_mmap(struct syscall_args *args);
uint64_t sys_munmap(struct syscall_args *args);
/* Mapespace operations */
void vm_mapspace_insert(struct vm_mapspace *ms, struct vm_mapping *mapping);
void vm_mapspace_remove(struct vm_mapspace *ms, struct vm_mapping *mapping);
struct vm_mapping *vm_mapping_fetch(struct vm_mapspace *ms, vaddr_t va);
void vm_free_mapq(vm_mapq_t *mapq);
#endif /* !_VM_MMAP_H_ */
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