WebSVN – HelenOS-historic – Diff – /kernel/trunk/generic/include/mm/frame.h


/*
 * 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 ONE_FRAME   0
 
#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)        ((index_t)((frame) - (zone)->frames))
#define FRAME_INDEX_VALID(zone, index)      (((index) >= 0) && ((index) < ((zone)->free_count + (zone)->busy_count)))
#define IS_BUDDY_ORDER_OK(index, order)     ((~(((__native) -1) << (order)) & (index)) == 0)
#define IS_BUDDY_LEFT_BLOCK(zone, frame)    (((FRAME_INDEX((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)
#define IS_BUDDY_RIGHT_BLOCK(zone, frame)   (((FRAME_INDEX((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)
 
#define ZONE_BLACKLIST_SIZE 3
 
struct zone {
    link_t link;        /**< link to previous and next zone */
 
    SPINLOCK_DECLARE(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 */
    count_t free_count; /**< number of free frame_t structures */
    count_t busy_count; /**< number of busy frame_t structures */
   
    buddy_system_t * buddy_system; /**< buddy system for the zone */
    int flags;
};
 
struct frame {
    count_t refcount;   /**< tracking of shared frames  */
    __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 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
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/include/mm/frame.h – Rev 623 → 624

Rev 623		Rev 624
1	/*	1	/*
2	* Copyright (C) 2005 Jakub Jermar	2	* Copyright (C) 2005 Jakub Jermar
3	* Copyright (C) 2005 Sergey Bondari	3	* Copyright (C) 2005 Sergey Bondari
4	* All rights reserved.	4	* All rights reserved.
5	*	5	*
6	* Redistribution and use in source and binary forms, with or without	6	* Redistribution and use in source and binary forms, with or without
7	* modification, are permitted provided that the following conditions	7	* modification, are permitted provided that the following conditions
8	* are met:	8	* are met:
9	*	9	*
10	* - Redistributions of source code must retain the above copyright	10	* - Redistributions of source code must retain the above copyright
11	* notice, this list of conditions and the following disclaimer.	11	* notice, this list of conditions and the following disclaimer.
12	* - Redistributions in binary form must reproduce the above copyright	12	* - Redistributions in binary form must reproduce the above copyright
13	* notice, this list of conditions and the following disclaimer in the	13	* notice, this list of conditions and the following disclaimer in the
14	* documentation and/or other materials provided with the distribution.	14	* documentation and/or other materials provided with the distribution.
15	* - The name of the author may not be used to endorse or promote products	15	* - The name of the author may not be used to endorse or promote products
16	* derived from this software without specific prior written permission.	16	* derived from this software without specific prior written permission.
17	*	17	*
18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	23	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	27	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	28	*/
29		29
30	#ifndef __FRAME_H__	30	#ifndef __FRAME_H__
31	#define __FRAME_H__	31	#define __FRAME_H__
32		32
33	#include <arch/types.h>	33	#include <arch/types.h>
34	#include <typedefs.h>	34	#include <typedefs.h>
35	#include <list.h>	35	#include <list.h>
36	#include <synch/spinlock.h>	36	#include <synch/spinlock.h>
37	#include <mm/buddy.h>	37	#include <mm/buddy.h>
38		38
39	#define ONE_FRAME 0	39	#define ONE_FRAME 0
40		40
41	#define FRAME_KA 1 /* skip frames conflicting with user address space */	41	#define FRAME_KA 1 /* skip frames conflicting with user address space */
42	#define FRAME_PANIC 2 /* panic on failure */	42	#define FRAME_PANIC 2 /* panic on failure */
43		43
44	#define FRAME2ADDR(zone, frame) ((zone)->base + ((frame) - (zone)->frames) * FRAME_SIZE)	44	#define FRAME2ADDR(zone, frame) ((zone)->base + ((frame) - (zone)->frames) * FRAME_SIZE)
45	#define ADDR2FRAME(zone, addr) (&((zone)->frames[((addr) - (zone)->base) / FRAME_SIZE]))	45	#define ADDR2FRAME(zone, addr) (&((zone)->frames[((addr) - (zone)->base) / FRAME_SIZE]))
46	#define FRAME_INDEX(zone, frame) ((index_t)((frame) - (zone)->frames))	46	#define FRAME_INDEX(zone, frame) ((index_t)((frame) - (zone)->frames))
47	#define FRAME_INDEX_VALID(zone, index) (((index) >= 0) && ((index) < ((zone)->free_count + (zone)->busy_count)))	47	#define FRAME_INDEX_VALID(zone, index) (((index) >= 0) && ((index) < ((zone)->free_count + (zone)->busy_count)))
48	#define IS_BUDDY_ORDER_OK(index, order) ((~(((__native) -1) << (order)) & (index)) == 0)	48	#define IS_BUDDY_ORDER_OK(index, order) ((~(((__native) -1) << (order)) & (index)) == 0)
49	#define IS_BUDDY_LEFT_BLOCK(zone, frame) (((FRAME_INDEX((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)	49	#define IS_BUDDY_LEFT_BLOCK(zone, frame) (((FRAME_INDEX((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)
50	#define IS_BUDDY_RIGHT_BLOCK(zone, frame) (((FRAME_INDEX((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)	50	#define IS_BUDDY_RIGHT_BLOCK(zone, frame) (((FRAME_INDEX((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)
51		51
52	#define ZONE_BLACKLIST_SIZE 3	52	#define ZONE_BLACKLIST_SIZE 3
53		53
54	struct zone {	54	struct zone {
55	link_t link; /*< link to previous and next zone /	55	link_t link; /*< link to previous and next zone /
56		56
57	SPINLOCK_DECLARE(lock); /*< this lock protects everything below /	57	SPINLOCK_DECLARE(lock); /*< this lock protects everything below /
58	__address base; /*< physical address of the first frame in the frames array /	58	__address base; /*< physical address of the first frame in the frames array /
59	frame_t frames; /< array of frame_t structures in this zone /	59	frame_t frames; /< array of frame_t structures in this zone /
60	count_t free_count; /*< number of free frame_t structures /	60	count_t free_count; /*< number of free frame_t structures /
61	count_t busy_count; /*< number of busy frame_t structures /	61	count_t busy_count; /*< number of busy frame_t structures /
62		62
63	buddy_system_t * buddy_system; /*< buddy system for the zone /	63	buddy_system_t * buddy_system; /*< buddy system for the zone /
64	int flags;	64	int flags;
65	};	65	};
66		66
67	struct frame {	67	struct frame {
68	count_t refcount; /*< tracking of shared frames /	68	count_t refcount; /*< tracking of shared frames /
69	__u8 buddy_order; /*< buddy system block order /	69	__u8 buddy_order; /*< buddy system block order /
70	link_t buddy_link; /*< link to the next free block inside one order /	70	link_t buddy_link; /*< link to the next free block inside one order /
71	};	71	};
72		72
73	struct region {	73	struct region {
74	__address base;	74	__address base;
75	size_t size;	75	size_t size;
76	};	76	};
77		77
78	extern region_t zone_blacklist[];	78	extern region_t zone_blacklist[];
79	extern count_t zone_blacklist_count;	79	extern count_t zone_blacklist_count;
80	extern void frame_region_not_free(__address base, size_t size);	80	extern void frame_region_not_free(__address base, size_t size);
81	extern void zone_create_in_region(__address base, size_t size);	81	extern void zone_create_in_region(__address base, size_t size);
82		82
83	extern spinlock_t zone_head_lock; /*< this lock protects zone_head list /	83	extern spinlock_t zone_head_lock; /*< this lock protects zone_head list /
84	extern link_t zone_head; /*< list of all zones in the system /	84	extern link_t zone_head; /*< list of all zones in the system /
85		85
86	extern void zone_init(void);	-
87	extern zone_t *zone_create(__address start, size_t size, int flags);	86	extern zone_t *zone_create(__address start, size_t size, int flags);
88	extern void zone_attach(zone_t *zone);	87	extern void zone_attach(zone_t *zone);
89		88
90	extern void frame_init(void);	89	extern void frame_init(void);
91	extern void frame_initialize(frame_t frame, zone_t zone);	90	extern void frame_initialize(frame_t frame, zone_t zone);
92	__address frame_alloc(int flags, __u8 order);	91	__address frame_alloc(int flags, __u8 order);
93	extern void frame_free(__address addr);	92	extern void frame_free(__address addr);
94	zone_t * get_zone_by_frame(frame_t * frame);	93	zone_t * get_zone_by_frame(frame_t * frame);
95		94
96	/*	95	/*
97	* Buddy system operations	96	* Buddy system operations
98	*/	97	*/
99	link_t * zone_buddy_find_buddy(buddy_system_t b, link_t buddy);	98	link_t * zone_buddy_find_buddy(buddy_system_t b, link_t buddy);
100	link_t * zone_buddy_bisect(buddy_system_t b, link_t block);	99	link_t * zone_buddy_bisect(buddy_system_t b, link_t block);
101	link_t * zone_buddy_coalesce(buddy_system_t b, link_t buddy_l, link_t * buddy_r);	100	link_t * zone_buddy_coalesce(buddy_system_t b, link_t buddy_l, link_t * buddy_r);
102	void zone_buddy_set_order(buddy_system_t b, link_t block, __u8 order);	101	void zone_buddy_set_order(buddy_system_t b, link_t block, __u8 order);
103	__u8 zone_buddy_get_order(buddy_system_t b, link_t block);	102	__u8 zone_buddy_get_order(buddy_system_t b, link_t block);
104	void zone_buddy_mark_busy(buddy_system_t b, link_t block);	103	void zone_buddy_mark_busy(buddy_system_t b, link_t block);
105		104
106	/*	105	/*
107	* TODO: Implement the following functions.	106	* TODO: Implement the following functions.
108	*/	107	*/
109	extern frame_t frame_reference(frame_t frame);	108	extern frame_t frame_reference(frame_t frame);
110	extern void frame_release(frame_t *frame);	109	extern void frame_release(frame_t *frame);
111		110
112	#endif	111	#endif
113		112