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