0,0 → 1,111 |
/* |
* Copyright (C) 2005 Jakub Jermar |
* Copyright (C) 2005 Sergey Bondari |
* All rights reserved. |
* |
* Redistribution and use in source and binary forms, with or without |
* modification, are permitted provided that the following conditions |
* are met: |
* |
* - Redistributions of source code must retain the above copyright |
* notice, this list of conditions and the following disclaimer. |
* - 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. |
* - The name of the author may not be used to endorse or promote products |
* derived from this software without specific prior written permission. |
* |
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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 __FRAME_H__ |
#define __FRAME_H__ |
|
#include <arch/types.h> |
#include <typedefs.h> |
#include <list.h> |
#include <synch/spinlock.h> |
#include <mm/buddy.h> |
|
#define FRAME_KA 1 /* skip frames conflicting with user address space */ |
#define FRAME_PANIC 2 /* panic on failure */ |
|
#define FRAME2ADDR(zone, frame) ((zone)->base + ((frame) - (zone)->frames) * FRAME_SIZE) |
#define ADDR2FRAME(zone, addr) (&((zone)->frames[((addr) - (zone)->base) / FRAME_SIZE])) |
#define FRAME_INDEX(zone, frame) ((count_t)((frame) - (zone)->frames)) |
#define FRAME_INDEX_VALID(zone, index) (((index) >= 0) && ((index) < ((zone)->free_count + (zone)->busy_count))) |
#define IS_BUDDY_LEFT_BLOCK(zone, frame) ((FRAME_INDEX((zone), (frame)) % (1 << ((frame)->buddy_order + 1))) == 0) |
#define IS_BUDDY_RIGHT_BLOCK(zone, frame) ((FRAME_INDEX((zone), (frame)) % (1 << ((frame)->buddy_order + 1))) == (1 << (frame)->buddy_order)) |
|
#define ZONE_BLACKLIST_SIZE 3 |
|
struct zone { |
link_t link; /**< link to previous and next zone */ |
|
spinlock_t lock; /**< this lock protects everything below */ |
__address base; /**< physical address of the first frame in the frames array */ |
frame_t *frames; /**< array of frame_t structures in this zone */ |
link_t free_head; /**< list of free frame_t structures */ |
count_t free_count; /**< number of frame_t structures in free list */ |
count_t busy_count; /**< number of frame_t structures not in free list */ |
|
buddy_system_t * buddy_system; /**< buddy system for the zone */ |
int flags; |
}; |
|
struct frame { |
count_t refcount; /**< when == 0, the frame is in free list */ |
link_t link; /**< link to zone free list when refcount == 0 */ |
__u8 buddy_order; /**< buddy system block order */ |
link_t buddy_link; /**< link to the next free block inside one order*/ |
}; |
|
struct region { |
__address base; |
size_t size; |
}; |
|
extern region_t zone_blacklist[]; |
extern count_t zone_blacklist_count; |
extern void frame_region_not_free(__address base, size_t size); |
extern void zone_create_in_region(__address base, size_t size); |
|
extern spinlock_t zone_head_lock; /**< this lock protects zone_head list */ |
extern link_t zone_head; /**< list of all zones in the system */ |
|
extern void zone_init(void); |
extern zone_t *zone_create(__address start, size_t size, int flags); |
extern void zone_attach(zone_t *zone); |
|
extern void frame_init(void); |
extern void frame_initialize(frame_t *frame, zone_t *zone); |
__address frame_alloc(int flags, __u8 order); |
extern void frame_free(__address addr); |
zone_t * get_zone_by_frame(frame_t * frame); |
|
/* |
* Buddy system operations |
*/ |
link_t * zone_buddy_find_buddy(buddy_system_t *b, link_t * buddy); |
link_t * zone_buddy_bisect(buddy_system_t *b, link_t * block); |
link_t * zone_buddy_coalesce(buddy_system_t *b, link_t * buddy_l, link_t * buddy_r); |
void zone_buddy_set_order(buddy_system_t *b, link_t * block, __u8 order); |
__u8 zone_buddy_get_order(buddy_system_t *b, link_t * block); |
void zone_buddy_mark_busy(buddy_system_t *b, link_t * block); |
|
/* |
* TODO: Implement the following functions. |
*/ |
extern frame_t *frame_reference(frame_t *frame); |
extern void frame_release(frame_t *frame); |
|
#endif |