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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 | 36 | ||
37 | #define FRAME_KA 1 /* skip frames conflicting with user address space */ |
37 | #define FRAME_KA 1 /* skip frames conflicting with user address space */ |
38 | #define FRAME_PANIC 2 /* panic on failure */ |
38 | #define FRAME_PANIC 2 /* panic on failure */ |
39 | 39 | ||
40 | struct frame_zone { |
40 | struct frame_zone { |
41 | link_t fz_link; /**< link to previous and next frame_zone */ |
41 | link_t fz_link; /**< link to previous and next frame_zone */ |
42 | 42 | ||
43 | spinlock_t lock; /**< this lock protexts everything below */ |
43 | spinlock_t lock; /**< this lock protects everything below */ |
- | 44 | __address base; /**< physical address of the first frame in the frames array */ |
|
- | 45 | frame_t *frames; /**< array of frame_t structures in this zone */ |
|
44 | link_t free_head; /**< list of free frames */ |
46 | link_t free_head; /**< list of free frame_t structures */ |
45 | link_t busy_head; /**< list of busy frames */ |
47 | link_t busy_head; /**< list of busy frame_t structures */ |
46 | count_t free_count; /**< frames in free list */ |
48 | count_t free_count; /**< number of frame_t structures in free list */ |
47 | count_t busy_count; /**< frames in busy list */ |
49 | count_t busy_count; /**< number of frame_t structures in busy list */ |
48 | frame_t *frames; /**< array of frames in this zone */ |
- | |
49 | int flags; |
50 | int flags; |
50 | }; |
51 | }; |
51 | 52 | ||
52 | struct frame { |
53 | struct frame { |
53 | count_t refcount; /**< when > 0, the frame is in busy list, otherwise the frame is in free list */ |
54 | count_t refcount; /**< when > 0, the frame is in busy list, otherwise the frame is in free list */ |
54 | link_t link; /**< link either to frame_zone free or busy list */ |
55 | link_t link; /**< link either to frame_zone free or busy list */ |
55 | }; |
56 | }; |
56 | 57 | ||
57 | extern spinlock_t frame_zone_head_lock; /**< this lock protects frame_zone_head list */ |
58 | extern spinlock_t frame_zone_head_lock; /**< this lock protects frame_zone_head list */ |
58 | extern link_t frame_zone_head; /**< list of all frame_zone's in the system */ |
59 | extern link_t frame_zone_head; /**< list of all frame_zone's in the system */ |
59 | 60 | ||
60 | extern count_t frames; |
61 | extern count_t frames; |
61 | extern count_t frames_free; |
62 | extern count_t frames_free; |
62 | 63 | ||
63 | extern count_t kernel_frames; |
64 | extern count_t kernel_frames; |
64 | extern count_t kernel_frames_free; |
65 | extern count_t kernel_frames_free; |
65 | 66 | ||
66 | extern __u8 *frame_bitmap; |
67 | extern __u8 *frame_bitmap; |
67 | extern count_t frame_bitmap_octets; |
68 | extern count_t frame_bitmap_octets; |
68 | 69 | ||
69 | extern __u8 *frame_kernel_bitmap; |
70 | extern __u8 *frame_kernel_bitmap; |
70 | 71 | ||
71 | extern void frame_init(void); |
72 | extern void frame_init(void); |
72 | 73 | ||
73 | __address frame_alloc(int flags); |
74 | __address frame_alloc(int flags); |
74 | extern void frame_free(__address addr); |
75 | extern void frame_free(__address addr); |
75 | extern void frame_not_free(__address addr); |
76 | extern void frame_not_free(__address addr); |
76 | extern void frame_region_not_free(__address start, __address stop); |
77 | extern void frame_region_not_free(__address start, __address stop); |
77 | 78 | ||
- | 79 | extern frame_zone_t *frame_zone_create(); |
|
78 | #endif |
80 | #endif |
79 | 81 |