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_LEFT_BLOCK(zone, frame)    ((FRAME_INDEX((zone), (frame)) & ~(((__native) -1)<<((frame)->buddy_order + 1))) == 0)
 
#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 */
    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 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
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/include/mm/frame.h – Rev 539 → 548

Rev 539		Rev 548
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
-		40
39	#define FRAME_KA 1 /* skip frames conflicting with user address space */	41	#define FRAME_KA 1 /* skip frames conflicting with user address space */
40	#define FRAME_PANIC 2 /* panic on failure */	42	#define FRAME_PANIC 2 /* panic on failure */
41		43
42	#define FRAME2ADDR(zone, frame) ((zone)->base + ((frame) - (zone)->frames) * FRAME_SIZE)	44	#define FRAME2ADDR(zone, frame) ((zone)->base + ((frame) - (zone)->frames) * FRAME_SIZE)
43	#define ADDR2FRAME(zone, addr) (&((zone)->frames[((addr) - (zone)->base) / FRAME_SIZE]))	45	#define ADDR2FRAME(zone, addr) (&((zone)->frames[((addr) - (zone)->base) / FRAME_SIZE]))
44	#define FRAME_INDEX(zone, frame) ((index_t)((frame) - (zone)->frames))	46	#define FRAME_INDEX(zone, frame) ((index_t)((frame) - (zone)->frames))
45	#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)))
46	#define IS_BUDDY_LEFT_BLOCK(zone, frame) ((FRAME_INDEX((zone), (frame)) & ~(((__native) -1)<<((frame)->buddy_order + 1))) == 0)	48	#define IS_BUDDY_LEFT_BLOCK(zone, frame) ((FRAME_INDEX((zone), (frame)) & ~(((__native) -1)<<((frame)->buddy_order + 1))) == 0)
47		49
48	#define ZONE_BLACKLIST_SIZE 3	50	#define ZONE_BLACKLIST_SIZE 3
49		51
50	struct zone {	52	struct zone {
51	link_t link; /*< link to previous and next zone /	53	link_t link; /*< link to previous and next zone /
52		54
53	spinlock_t lock; /*< this lock protects everything below /	55	spinlock_t lock; /*< this lock protects everything below /
54	__address base; /*< physical address of the first frame in the frames array /	56	__address base; /*< physical address of the first frame in the frames array /
55	frame_t frames; /< array of frame_t structures in this zone /	57	frame_t frames; /< array of frame_t structures in this zone /
56	count_t free_count; /*< number of free frame_t structures /	58	count_t free_count; /*< number of free frame_t structures /
57	count_t busy_count; /*< number of busy frame_t structures /	59	count_t busy_count; /*< number of busy frame_t structures /
58		60
59	buddy_system_t * buddy_system; /*< buddy system for the zone /	61	buddy_system_t * buddy_system; /*< buddy system for the zone /
60	int flags;	62	int flags;
61	};	63	};
62		64
63	struct frame {	65	struct frame {
64	count_t refcount; /*< tracking of shared frames /	66	count_t refcount; /*< tracking of shared frames /
65	__u8 buddy_order; /*< buddy system block order /	67	__u8 buddy_order; /*< buddy system block order /
66	link_t buddy_link; /*< link to the next free block inside one order /	68	link_t buddy_link; /*< link to the next free block inside one order /
67	};	69	};
68		70
69	struct region {	71	struct region {
70	__address base;	72	__address base;
71	size_t size;	73	size_t size;
72	};	74	};
73		75
74	extern region_t zone_blacklist[];	76	extern region_t zone_blacklist[];
75	extern count_t zone_blacklist_count;	77	extern count_t zone_blacklist_count;
76	extern void frame_region_not_free(__address base, size_t size);	78	extern void frame_region_not_free(__address base, size_t size);
77	extern void zone_create_in_region(__address base, size_t size);	79	extern void zone_create_in_region(__address base, size_t size);
78		80
79	extern spinlock_t zone_head_lock; /*< this lock protects zone_head list /	81	extern spinlock_t zone_head_lock; /*< this lock protects zone_head list /
80	extern link_t zone_head; /*< list of all zones in the system /	82	extern link_t zone_head; /*< list of all zones in the system /
81		83
82	extern void zone_init(void);	84	extern void zone_init(void);
83	extern zone_t *zone_create(__address start, size_t size, int flags);	85	extern zone_t *zone_create(__address start, size_t size, int flags);
84	extern void zone_attach(zone_t *zone);	86	extern void zone_attach(zone_t *zone);
85		87
86	extern void frame_init(void);	88	extern void frame_init(void);
87	extern void frame_initialize(frame_t frame, zone_t zone);	89	extern void frame_initialize(frame_t frame, zone_t zone);
88	__address frame_alloc(int flags, __u8 order);	90	__address frame_alloc(int flags, __u8 order);
89	extern void frame_free(__address addr);	91	extern void frame_free(__address addr);
90	zone_t * get_zone_by_frame(frame_t * frame);	92	zone_t * get_zone_by_frame(frame_t * frame);
91		93
92	/*	94	/*
93	* Buddy system operations	95	* Buddy system operations
94	*/	96	*/
95	link_t * zone_buddy_find_buddy(buddy_system_t b, link_t buddy);	97	link_t * zone_buddy_find_buddy(buddy_system_t b, link_t buddy);
96	link_t * zone_buddy_bisect(buddy_system_t b, link_t block);	98	link_t * zone_buddy_bisect(buddy_system_t b, link_t block);
97	link_t * zone_buddy_coalesce(buddy_system_t b, link_t buddy_l, link_t * buddy_r);	99	link_t * zone_buddy_coalesce(buddy_system_t b, link_t buddy_l, link_t * buddy_r);
98	void zone_buddy_set_order(buddy_system_t b, link_t block, __u8 order);	100	void zone_buddy_set_order(buddy_system_t b, link_t block, __u8 order);
99	__u8 zone_buddy_get_order(buddy_system_t b, link_t block);	101	__u8 zone_buddy_get_order(buddy_system_t b, link_t block);
100	void zone_buddy_mark_busy(buddy_system_t b, link_t block);	102	void zone_buddy_mark_busy(buddy_system_t b, link_t block);
101		103
102	/*	104	/*
103	* TODO: Implement the following functions.	105	* TODO: Implement the following functions.
104	*/	106	*/
105	extern frame_t frame_reference(frame_t frame);	107	extern frame_t frame_reference(frame_t frame);
106	extern void frame_release(frame_t *frame);	108	extern void frame_release(frame_t *frame);
107		109
108	#endif	110	#endif
109		111