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1 | jermar | 1 | /* |
2 | * Copyright (C) 2005 Jakub Jermar |
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480 | bondari | 3 | * Copyright (C) 2005 Sergey Bondari |
1 | jermar | 4 | * All rights reserved. |
5 | * |
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6 | * Redistribution and use in source and binary forms, with or without |
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7 | * modification, are permitted provided that the following conditions |
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8 | * are met: |
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9 | * |
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10 | * - Redistributions of source code must retain the above copyright |
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11 | * notice, this list of conditions and the following disclaimer. |
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12 | * - Redistributions in binary form must reproduce the above copyright |
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13 | * notice, this list of conditions and the following disclaimer in the |
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14 | * documentation and/or other materials provided with the distribution. |
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15 | * - The name of the author may not be used to endorse or promote products |
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16 | * derived from this software without specific prior written permission. |
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17 | * |
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18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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28 | */ |
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29 | |||
30 | #ifndef __FRAME_H__ |
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31 | #define __FRAME_H__ |
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32 | |||
33 | #include <arch/types.h> |
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102 | jermar | 34 | #include <typedefs.h> |
354 | jermar | 35 | #include <list.h> |
36 | #include <synch/spinlock.h> |
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479 | bondari | 37 | #include <mm/buddy.h> |
1 | jermar | 38 | |
548 | jermar | 39 | #define ONE_FRAME 0 |
40 | |||
1 | jermar | 41 | #define FRAME_KA 1 /* skip frames conflicting with user address space */ |
42 | #define FRAME_PANIC 2 /* panic on failure */ |
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43 | |||
480 | bondari | 44 | #define FRAME2ADDR(zone, frame) ((zone)->base + ((frame) - (zone)->frames) * FRAME_SIZE) |
45 | #define ADDR2FRAME(zone, addr) (&((zone)->frames[((addr) - (zone)->base) / FRAME_SIZE])) |
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538 | jermar | 46 | #define FRAME_INDEX(zone, frame) ((index_t)((frame) - (zone)->frames)) |
533 | bondari | 47 | #define FRAME_INDEX_VALID(zone, index) (((index) >= 0) && ((index) < ((zone)->free_count + (zone)->busy_count))) |
564 | jermar | 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) |
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50 | #define IS_BUDDY_RIGHT_BLOCK(zone, frame) (((FRAME_INDEX((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1) |
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479 | bondari | 51 | |
629 | decky | 52 | #define ZONE_BLACKLIST_SIZE 4 |
480 | bondari | 53 | |
366 | jermar | 54 | struct zone { |
55 | link_t link; /**< link to previous and next zone */ |
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354 | jermar | 56 | |
623 | jermar | 57 | SPINLOCK_DECLARE(lock); /**< this lock protects everything below */ |
355 | jermar | 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 */ |
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539 | jermar | 60 | count_t free_count; /**< number of free frame_t structures */ |
61 | count_t busy_count; /**< number of busy frame_t structures */ |
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479 | bondari | 62 | |
480 | bondari | 63 | buddy_system_t * buddy_system; /**< buddy system for the zone */ |
354 | jermar | 64 | int flags; |
65 | }; |
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66 | |||
67 | struct frame { |
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537 | jermar | 68 | count_t refcount; /**< tracking of shared frames */ |
480 | bondari | 69 | __u8 buddy_order; /**< buddy system block order */ |
537 | jermar | 70 | link_t buddy_link; /**< link to the next free block inside one order */ |
374 | jermar | 71 | }; |
354 | jermar | 72 | |
533 | bondari | 73 | struct region { |
74 | __address base; |
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75 | size_t size; |
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76 | }; |
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77 | |||
78 | extern region_t zone_blacklist[]; |
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79 | extern count_t zone_blacklist_count; |
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80 | extern void frame_region_not_free(__address base, size_t size); |
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81 | extern void zone_create_in_region(__address base, size_t size); |
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82 | |||
366 | jermar | 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 */ |
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354 | jermar | 85 | |
368 | jermar | 86 | extern zone_t *zone_create(__address start, size_t size, int flags); |
87 | extern void zone_attach(zone_t *zone); |
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1 | jermar | 88 | |
89 | extern void frame_init(void); |
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368 | jermar | 90 | extern void frame_initialize(frame_t *frame, zone_t *zone); |
533 | bondari | 91 | __address frame_alloc(int flags, __u8 order); |
1 | jermar | 92 | extern void frame_free(__address addr); |
480 | bondari | 93 | zone_t * get_zone_by_frame(frame_t * frame); |
1 | jermar | 94 | |
366 | jermar | 95 | /* |
479 | bondari | 96 | * Buddy system operations |
97 | */ |
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489 | jermar | 98 | link_t * zone_buddy_find_buddy(buddy_system_t *b, link_t * buddy); |
99 | link_t * zone_buddy_bisect(buddy_system_t *b, link_t * block); |
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100 | link_t * zone_buddy_coalesce(buddy_system_t *b, link_t * buddy_l, link_t * buddy_r); |
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101 | void zone_buddy_set_order(buddy_system_t *b, link_t * block, __u8 order); |
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102 | __u8 zone_buddy_get_order(buddy_system_t *b, link_t * block); |
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533 | bondari | 103 | void zone_buddy_mark_busy(buddy_system_t *b, link_t * block); |
479 | bondari | 104 | |
105 | /* |
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366 | jermar | 106 | * TODO: Implement the following functions. |
107 | */ |
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108 | extern frame_t *frame_reference(frame_t *frame); |
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109 | extern void frame_release(frame_t *frame); |
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110 | |||
676 | bondari | 111 | |
112 | /* |
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113 | * Console functions |
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114 | */ |
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115 | extern void zone_print_list(void); |
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116 | extern void zone_print_one(index_t index); |
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117 | |||
1 | jermar | 118 | #endif |