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/*
* Copyright (c) 2011, 2012 Richard Braun.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*
* Virtual memory map management.
*/
#ifndef _VM_VM_MAP_H
#define _VM_VM_MAP_H
#include <kern/list.h>
#include <kern/rbtree.h>
#include <kern/spinlock.h>
#include <kern/stdint.h>
#include <machine/pmap.h>
/*
* Mapping flags and masks.
*
* All these flags can be used when creating a mapping. Most of them are
* also used as map entry flags.
*/
#define VM_MAP_PROT_READ 0x00001
#define VM_MAP_PROT_WRITE 0x00002
#define VM_MAP_PROT_EXEC 0x00004
#define VM_MAP_PROT_ALL (VM_MAP_PROT_READ \
| VM_MAP_PROT_WRITE \
| VM_MAP_PROT_EXEC)
#define VM_MAP_PROT_MASK VM_MAP_PROT_ALL
#define VM_MAP_MAX_PROT_READ (VM_MAP_PROT_READ << 4)
#define VM_MAP_MAX_PROT_WRITE (VM_MAP_PROT_WRITE << 4)
#define VM_MAP_MAX_PROT_EXEC (VM_MAP_PROT_EXEC << 4)
#define VM_MAP_MAX_PROT_ALL (VM_MAP_MAX_PROT_READ \
| VM_MAP_MAX_PROT_WRITE \
| VM_MAP_MAX_PROT_EXEC)
#define VM_MAP_MAX_PROT_MASK VM_MAP_MAX_PROT_ALL
#define VM_MAP_INHERIT_SHARE 0x00100
#define VM_MAP_INHERIT_COPY 0x00200
#define VM_MAP_INHERIT_NONE 0x00400
#define VM_MAP_INHERIT_MASK (VM_MAP_INHERIT_SHARE \
| VM_MAP_INHERIT_COPY \
| VM_MAP_INHERIT_NONE)
#define VM_MAP_ADVISE_NORMAL 0x01000
#define VM_MAP_ADVISE_RAND 0x02000
#define VM_MAP_ADVISE_SEQ 0x04000
#define VM_MAP_ADVISE_MASK (VM_MAP_ADVISE_NORMAL \
| VM_MAP_ADVISE_RAND \
| VM_MAP_ADVISE_SEQ)
#define VM_MAP_NOMERGE 0x10000
#define VM_MAP_FIXED 0x20000 /* Not an entry flag */
/*
* Flags that can be used as map entry flags.
*/
#define VM_MAP_ENTRY_MASK (VM_MAP_PROT_MASK \
| VM_MAP_MAX_PROT_MASK \
| VM_MAP_INHERIT_MASK \
| VM_MAP_ADVISE_MASK \
| VM_MAP_NOMERGE)
/*
* Memory range descriptor.
*/
struct vm_map_entry {
struct list list_node;
struct rbtree_node tree_node;
unsigned long start;
unsigned long end;
struct vm_object *object;
uint64_t offset;
int flags;
};
/*
* Memory map.
*/
struct vm_map {
struct spinlock lock;
struct list entry_list;
struct rbtree entry_tree;
unsigned int nr_entries;
unsigned long start;
unsigned long end;
size_t size;
struct vm_map_entry *lookup_cache;
unsigned long find_cache;
size_t find_cache_threshold;
struct pmap *pmap;
};
/*
* Create a virtual mapping.
*/
int vm_map_enter(struct vm_map *map, struct vm_object *object, uint64_t offset,
unsigned long *startp, size_t size, size_t align, int flags);
/*
* Remove mappings from start to end.
*/
void vm_map_remove(struct vm_map *map, unsigned long start, unsigned long end);
/*
* Set up the vm_map module.
*/
void vm_map_setup(void);
/*
* Display information about a memory map.
*/
void vm_map_info(struct vm_map *map);
#endif /* _VM_VM_MAP_H */
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