Subversion Repositories HelenOS-historic

Rev

Rev 762 | Rev 778 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1 jermar 1
/*
2
 * Copyright (C) 2005 Jakub Jermar
480 bondari 3
 * Copyright (C) 2005 Sergey Bondari
1 jermar 4
 * All rights reserved.
5
 *
6
 * Redistribution and use in source and binary forms, with or without
7
 * modification, are permitted provided that the following conditions
8
 * are met:
9
 *
10
 * - Redistributions of source code must retain the above copyright
11
 *   notice, this list of conditions and the following disclaimer.
12
 * - Redistributions in binary form must reproduce the above copyright
13
 *   notice, this list of conditions and the following disclaimer in the
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
16
 *   derived from this software without specific prior written permission.
17
 *
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
20
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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
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
27
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
 */
29
 
30
#ifndef __FRAME_H__
31
#define __FRAME_H__
32
 
33
#include <arch/types.h>
102 jermar 34
#include <typedefs.h>
354 jermar 35
#include <list.h>
36
#include <synch/spinlock.h>
479 bondari 37
#include <mm/buddy.h>
759 palkovsky 38
#include <mm/slab.h>
1 jermar 39
 
548 jermar 40
#define ONE_FRAME   0
41
 
762 palkovsky 42
#define FRAME_KA        0x1 /* skip frames conflicting with user address space */
43
#define FRAME_PANIC     0x2 /* panic on failure */
44
#define FRAME_ATOMIC            0x4 /* do not panic and do not sleep on failure */
45
#define FRAME_NO_RECLAIM        0x8     /* Do not start reclaiming when no free memory */
1 jermar 46
 
689 bondari 47
#define FRAME_OK        0   /* frame_alloc return status */
48
#define FRAME_NO_MEMORY     1   /* frame_alloc return status */
49
#define FRAME_ERROR     2   /* frame_alloc return status */
50
 
763 jermar 51
#define FRAME2ADDR(zone, frame)         ((zone)->base + (((frame) - (zone)->frames) << FRAME_WIDTH))
52
#define ADDR2FRAME(zone, addr)          (&((zone)->frames[(((addr) - (zone)->base) >> FRAME_WIDTH)]))
538 jermar 53
#define FRAME_INDEX(zone, frame)        ((index_t)((frame) - (zone)->frames))
724 palkovsky 54
#define FRAME_INDEX_ABS(zone, frame)        (((index_t)((frame) - (zone)->frames)) + (zone)->base_index)
533 bondari 55
#define FRAME_INDEX_VALID(zone, index)      (((index) >= 0) && ((index) < ((zone)->free_count + (zone)->busy_count)))
564 jermar 56
#define IS_BUDDY_ORDER_OK(index, order)     ((~(((__native) -1) << (order)) & (index)) == 0)
57
#define IS_BUDDY_LEFT_BLOCK(zone, frame)    (((FRAME_INDEX((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)
58
#define IS_BUDDY_RIGHT_BLOCK(zone, frame)   (((FRAME_INDEX((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)
724 palkovsky 59
#define IS_BUDDY_LEFT_BLOCK_ABS(zone, frame)    (((FRAME_INDEX_ABS((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0)
60
#define IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame)   (((FRAME_INDEX_ABS((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1)
479 bondari 61
 
629 decky 62
#define ZONE_BLACKLIST_SIZE 4
480 bondari 63
 
366 jermar 64
struct zone {
65
    link_t link;        /**< link to previous and next zone */
354 jermar 66
 
623 jermar 67
    SPINLOCK_DECLARE(lock); /**< this lock protects everything below */
355 jermar 68
    __address base;     /**< physical address of the first frame in the frames array */
724 palkovsky 69
    index_t base_index; /**< frame index offset of the zone base */
355 jermar 70
    frame_t *frames;    /**< array of frame_t structures in this zone */
539 jermar 71
    count_t free_count; /**< number of free frame_t structures */
72
    count_t busy_count; /**< number of busy frame_t structures */
479 bondari 73
 
480 bondari 74
    buddy_system_t * buddy_system; /**< buddy system for the zone */
354 jermar 75
    int flags;
76
};
77
 
78
struct frame {
537 jermar 79
    count_t refcount;   /**< tracking of shared frames  */
480 bondari 80
    __u8 buddy_order;   /**< buddy system block order */
537 jermar 81
    link_t buddy_link;  /**< link to the next free block inside one order */
762 palkovsky 82
    void *parent;           /**< If allocated by slab, this points there */
374 jermar 83
};
354 jermar 84
 
533 bondari 85
struct region {
86
    __address base;
87
    size_t size;
88
};
89
 
90
extern region_t zone_blacklist[];
91
extern count_t zone_blacklist_count;
92
extern void frame_region_not_free(__address base, size_t size);
93
extern void zone_create_in_region(__address base, size_t size);
94
 
366 jermar 95
extern spinlock_t zone_head_lock;   /**< this lock protects zone_head list */
96
extern link_t zone_head;        /**< list of all zones in the system */
354 jermar 97
 
368 jermar 98
extern zone_t *zone_create(__address start, size_t size, int flags);
99
extern void zone_attach(zone_t *zone);
1 jermar 100
 
101
extern void frame_init(void);
368 jermar 102
extern void frame_initialize(frame_t *frame, zone_t *zone);
689 bondari 103
 
762 palkovsky 104
__address frame_alloc(int flags, __u8 order, int * status, zone_t **pzone);
1 jermar 105
extern void frame_free(__address addr);
689 bondari 106
 
480 bondari 107
zone_t * get_zone_by_frame(frame_t * frame);
1 jermar 108
 
366 jermar 109
/*
479 bondari 110
 * Buddy system operations
111
 */
489 jermar 112
link_t * zone_buddy_find_buddy(buddy_system_t *b, link_t * buddy);
113
link_t * zone_buddy_bisect(buddy_system_t *b, link_t * block);
114
link_t * zone_buddy_coalesce(buddy_system_t *b, link_t * buddy_l, link_t * buddy_r);
115
void zone_buddy_set_order(buddy_system_t *b, link_t * block, __u8 order);
116
__u8 zone_buddy_get_order(buddy_system_t *b, link_t * block);
533 bondari 117
void zone_buddy_mark_busy(buddy_system_t *b, link_t * block);
762 palkovsky 118
extern frame_t * frame_addr2frame(__address addr);
479 bondari 119
 
120
/*
366 jermar 121
 * TODO: Implement the following functions.
122
 */
123
extern frame_t *frame_reference(frame_t *frame);
124
extern void frame_release(frame_t *frame);
125
 
676 bondari 126
 
127
/*
128
 * Console functions
129
 */
130
extern void zone_print_list(void);
683 bondari 131
extern void zone_print_one(__address base);
676 bondari 132
 
1 jermar 133
#endif