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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 <adt/list.h> |
36 | #include <synch/spinlock.h> |
36 | #include <synch/spinlock.h> |
37 | #include <mm/buddy.h> |
37 | #include <mm/buddy.h> |
38 | #include <mm/slab.h> |
38 | #include <mm/slab.h> |
39 | 39 | ||
40 | #define ONE_FRAME 0 |
40 | #define ONE_FRAME 0 |
41 | 41 | ||
42 | #define FRAME_KA 0x1 /* skip frames conflicting with user address space */ |
42 | #define FRAME_KA 0x1 /* skip frames conflicting with user address space */ |
43 | #define FRAME_PANIC 0x2 /* panic on failure */ |
43 | #define FRAME_PANIC 0x2 /* panic on failure */ |
44 | #define FRAME_ATOMIC 0x4 /* do not panic and do not sleep 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 */ |
45 | #define FRAME_NO_RECLAIM 0x8 /* Do not start reclaiming when no free memory */ |
46 | 46 | ||
47 | #define FRAME_OK 0 /* frame_alloc return status */ |
47 | #define FRAME_OK 0 /* frame_alloc return status */ |
48 | #define FRAME_NO_MEMORY 1 /* frame_alloc return status */ |
48 | #define FRAME_NO_MEMORY 1 /* frame_alloc return status */ |
49 | #define FRAME_ERROR 2 /* frame_alloc return status */ |
49 | #define FRAME_ERROR 2 /* frame_alloc return status */ |
50 | 50 | ||
51 | #define FRAME2ADDR(zone, frame) ((zone)->base + (((frame) - (zone)->frames) << FRAME_WIDTH)) |
51 | #define FRAME2ADDR(zone, frame) ((zone)->base + (((frame) - (zone)->frames) << FRAME_WIDTH)) |
52 | #define ADDR2FRAME(zone, addr) (&((zone)->frames[(((addr) - (zone)->base) >> FRAME_WIDTH)])) |
52 | #define ADDR2FRAME(zone, addr) (&((zone)->frames[(((addr) - (zone)->base) >> FRAME_WIDTH)])) |
53 | #define FRAME_INDEX(zone, frame) ((index_t)((frame) - (zone)->frames)) |
53 | #define FRAME_INDEX(zone, frame) ((index_t)((frame) - (zone)->frames)) |
54 | #define FRAME_INDEX_ABS(zone, frame) (((index_t)((frame) - (zone)->frames)) + (zone)->base_index) |
54 | #define FRAME_INDEX_ABS(zone, frame) (((index_t)((frame) - (zone)->frames)) + (zone)->base_index) |
55 | #define FRAME_INDEX_VALID(zone, index) (((index) >= 0) && ((index) < ((zone)->free_count + (zone)->busy_count))) |
55 | #define FRAME_INDEX_VALID(zone, index) (((index) >= 0) && ((index) < ((zone)->free_count + (zone)->busy_count))) |
56 | #define IS_BUDDY_ORDER_OK(index, order) ((~(((__native) -1) << (order)) & (index)) == 0) |
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) |
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) |
58 | #define IS_BUDDY_RIGHT_BLOCK(zone, frame) (((FRAME_INDEX((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1) |
59 | #define IS_BUDDY_LEFT_BLOCK_ABS(zone, frame) (((FRAME_INDEX_ABS((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 0) |
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) |
60 | #define IS_BUDDY_RIGHT_BLOCK_ABS(zone, frame) (((FRAME_INDEX_ABS((zone), (frame)) >> (frame)->buddy_order) & 0x1) == 1) |
61 | 61 | ||
62 | #define ZONE_BLACKLIST_SIZE 8 |
62 | #define ZONE_BLACKLIST_SIZE 8 |
63 | 63 | ||
64 | #define frame_alloc(order, flags) frame_alloc_generic(order, flags, NULL, NULL) |
64 | #define frame_alloc(order, flags) frame_alloc_generic(order, flags, NULL, NULL) |
65 | #define frame_alloc_rc(order, flags, status) frame_alloc_generic(order, flags, status, NULL) |
65 | #define frame_alloc_rc(order, flags, status) frame_alloc_generic(order, flags, status, NULL) |
66 | #define frame_alloc_rc_zone(order, flags, status, zone) frame_alloc_generic(order, flags, status, zone) |
66 | #define frame_alloc_rc_zone(order, flags, status, zone) frame_alloc_generic(order, flags, status, zone) |
67 | 67 | ||
68 | struct zone { |
68 | struct zone { |
69 | link_t link; /**< link to previous and next zone */ |
69 | link_t link; /**< link to previous and next zone */ |
70 | 70 | ||
71 | SPINLOCK_DECLARE(lock); /**< this lock protects everything below */ |
71 | SPINLOCK_DECLARE(lock); /**< this lock protects everything below */ |
72 | __address base; /**< physical address of the first frame in the frames array */ |
72 | __address base; /**< physical address of the first frame in the frames array */ |
73 | index_t base_index; /**< frame index offset of the zone base */ |
73 | index_t base_index; /**< frame index offset of the zone base */ |
74 | frame_t *frames; /**< array of frame_t structures in this zone */ |
74 | frame_t *frames; /**< array of frame_t structures in this zone */ |
75 | count_t free_count; /**< number of free frame_t structures */ |
75 | count_t free_count; /**< number of free frame_t structures */ |
76 | count_t busy_count; /**< number of busy frame_t structures */ |
76 | count_t busy_count; /**< number of busy frame_t structures */ |
77 | 77 | ||
78 | buddy_system_t * buddy_system; /**< buddy system for the zone */ |
78 | buddy_system_t * buddy_system; /**< buddy system for the zone */ |
79 | int flags; |
79 | int flags; |
80 | }; |
80 | }; |
81 | 81 | ||
82 | struct frame { |
82 | struct frame { |
83 | count_t refcount; /**< tracking of shared frames */ |
83 | count_t refcount; /**< tracking of shared frames */ |
84 | __u8 buddy_order; /**< buddy system block order */ |
84 | __u8 buddy_order; /**< buddy system block order */ |
85 | link_t buddy_link; /**< link to the next free block inside one order */ |
85 | link_t buddy_link; /**< link to the next free block inside one order */ |
86 | void *parent; /**< If allocated by slab, this points there */ |
86 | void *parent; /**< If allocated by slab, this points there */ |
87 | }; |
87 | }; |
88 | 88 | ||
89 | struct region { |
89 | struct region { |
90 | __address base; |
90 | __address base; |
91 | size_t size; |
91 | size_t size; |
92 | }; |
92 | }; |
93 | 93 | ||
94 | extern region_t zone_blacklist[]; |
94 | extern region_t zone_blacklist[]; |
95 | extern count_t zone_blacklist_count; |
95 | extern count_t zone_blacklist_count; |
96 | extern void frame_region_not_free(__address base, size_t size); |
96 | extern void frame_region_not_free(__address base, size_t size); |
97 | extern void zone_create_in_region(__address base, size_t size); |
97 | extern void zone_create_in_region(__address base, size_t size); |
98 | 98 | ||
99 | extern spinlock_t zone_head_lock; /**< this lock protects zone_head list */ |
99 | extern spinlock_t zone_head_lock; /**< this lock protects zone_head list */ |
100 | extern link_t zone_head; /**< list of all zones in the system */ |
100 | extern link_t zone_head; /**< list of all zones in the system */ |
101 | 101 | ||
102 | extern zone_t *zone_create(__address start, size_t size, int flags); |
102 | extern zone_t *zone_create(__address start, size_t size, int flags); |
103 | extern void zone_attach(zone_t *zone); |
103 | extern void zone_attach(zone_t *zone); |
104 | 104 | ||
105 | extern void frame_init(void); |
105 | extern void frame_init(void); |
106 | extern void frame_initialize(frame_t *frame, zone_t *zone); |
106 | extern void frame_initialize(frame_t *frame, zone_t *zone); |
107 | 107 | ||
108 | __address frame_alloc_generic(__u8 order, int flags, int * status, zone_t **pzone); |
108 | __address frame_alloc_generic(__u8 order, int flags, int * status, zone_t **pzone); |
109 | 109 | ||
110 | 110 | ||
111 | extern void frame_free(__address addr); |
111 | extern void frame_free(__address addr); |
112 | 112 | ||
113 | zone_t * get_zone_by_frame(frame_t * frame); |
113 | zone_t * get_zone_by_frame(frame_t * frame); |
114 | 114 | ||
115 | /* |
115 | /* |
116 | * Buddy system operations |
116 | * Buddy system operations |
117 | */ |
117 | */ |
118 | link_t * zone_buddy_find_buddy(buddy_system_t *b, link_t * buddy); |
118 | link_t * zone_buddy_find_buddy(buddy_system_t *b, link_t * buddy); |
119 | link_t * zone_buddy_bisect(buddy_system_t *b, link_t * block); |
119 | link_t * zone_buddy_bisect(buddy_system_t *b, link_t * block); |
120 | link_t * zone_buddy_coalesce(buddy_system_t *b, link_t * buddy_l, link_t * buddy_r); |
120 | link_t * zone_buddy_coalesce(buddy_system_t *b, link_t * buddy_l, link_t * buddy_r); |
121 | void zone_buddy_set_order(buddy_system_t *b, link_t * block, __u8 order); |
121 | void zone_buddy_set_order(buddy_system_t *b, link_t * block, __u8 order); |
122 | __u8 zone_buddy_get_order(buddy_system_t *b, link_t * block); |
122 | __u8 zone_buddy_get_order(buddy_system_t *b, link_t * block); |
123 | void zone_buddy_mark_busy(buddy_system_t *b, link_t * block); |
123 | void zone_buddy_mark_busy(buddy_system_t *b, link_t * block); |
124 | extern frame_t * frame_addr2frame(__address addr); |
124 | extern frame_t * frame_addr2frame(__address addr); |
125 | 125 | ||
126 | /* |
126 | /* |
127 | * TODO: Implement the following functions. |
127 | * TODO: Implement the following functions. |
128 | */ |
128 | */ |
129 | extern frame_t *frame_reference(frame_t *frame); |
129 | extern frame_t *frame_reference(frame_t *frame); |
130 | extern void frame_release(frame_t *frame); |
130 | extern void frame_release(frame_t *frame); |
131 | 131 | ||
132 | 132 | ||
133 | /* |
133 | /* |
134 | * Console functions |
134 | * Console functions |
135 | */ |
135 | */ |
136 | extern void zone_print_list(void); |
136 | extern void zone_print_list(void); |
137 | extern void zone_print_one(__address base); |
137 | extern void zone_print_one(__address base); |
138 | 138 | ||
139 | #endif |
139 | #endif |
140 | 140 |