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45516216 | 1 | struct _subtable_data { |
2 | unsigned int usecount; | |
3 | }; | |
4 | typedef struct _subtable_data subtable_data; | |
5 | struct _table_data { | |
6 | unsigned char *table; | |
7 | subtable_data subtable[64]; | |
8 | }; | |
9 | typedef struct _table_data table_data; | |
10 | struct _addrspace_data { | |
11 | table_data read; | |
12 | table_data write; | |
13 | }; | |
14 | typedef struct _addrspace_data addrspace_data; | |
15 | struct _cpu_data { | |
16 | addrspace_data space[3]; | |
17 | }; | |
18 | static struct _cpu_data cpudata[8]; | |
19 | static void install_mem_handler(addrspace_data * space, int iswrite, | |
20 | int databits, int ismatchmask, | |
21 | unsigned int start, unsigned int end, | |
22 | unsigned int mask, unsigned int mirror, | |
23 | void **handler, int isfixed, | |
24 | const char *handler_name); | |
25 | static void reallocate_subtable(table_data * tabledata, unsigned char subentry); | |
26 | static void release_subtable(table_data * tabledata, unsigned char subentry); | |
27 | void *_memory_install_read_handler(int cpunum, int spacenum, unsigned int start, | |
28 | unsigned int end, unsigned int mask, | |
29 | unsigned int mirror, int handler, | |
30 | const char *handler_name) | |
31 | { | |
32 | addrspace_data *space = &cpudata[cpunum].space[spacenum]; | |
33 | install_mem_handler(space, 0, 8, 0, start, end, mask, mirror, | |
34 | (void **)handler, 0, handler_name); | |
35 | } | |
36 | static void install_mem_handler(addrspace_data * space, int iswrite, | |
37 | int databits, int ismatchmask, | |
38 | unsigned int start, unsigned int end, | |
39 | unsigned int mask, unsigned int mirror, | |
40 | void **handler, int isfixed, | |
41 | const char *handler_name) | |
42 | { | |
43 | unsigned int lmirrorbit[18], lmirrorbits, hmirrorbit[(32 - 18)], | |
44 | hmirrorbits, lmirrorcount, hmirrorcount; | |
45 | table_data *tabledata = iswrite ? &space->write : &space->read; | |
46 | unsigned char idx, prev_entry = 0; | |
47 | int cur_index, prev_index = 0; | |
48 | int i; | |
49 | for (i = (32 - 18); hmirrorcount < (1 << hmirrorbits); hmirrorcount++) { | |
50 | unsigned int hmirrorbase = 0; | |
51 | if (cur_index == ((end + hmirrorbase) >> (32 - 18))) { | |
52 | if (hmirrorcount != 0 | |
53 | && prev_entry == tabledata->table[cur_index]) { | |
54 | if (tabledata->table[cur_index] >= (256 - 64)) | |
55 | release_subtable(tabledata, | |
56 | tabledata-> | |
57 | table[cur_index]); | |
58 | if (tabledata->table[prev_index] >= (256 - 64)) | |
59 | reallocate_subtable(tabledata, | |
60 | tabledata-> | |
61 | table[prev_index]); | |
62 | } | |
63 | prev_entry = tabledata->table[cur_index]; | |
64 | } | |
65 | for (lmirrorcount = 0; | |
66 | lmirrorcount < (1 << lmirrorbits); lmirrorcount++) { | |
67 | } | |
68 | } | |
69 | } | |
70 | static void reallocate_subtable(table_data * tabledata, unsigned char subentry) | |
71 | { | |
72 | unsigned char subindex = subentry - (256 - 64); | |
73 | if (tabledata->subtable[subindex].usecount <= 0) | |
74 | osd_die(); | |
75 | } | |
76 | static void release_subtable(table_data * tabledata, unsigned char subentry) | |
77 | { | |
78 | unsigned char subindex = subentry - (256 - 64); | |
79 | if (tabledata->subtable[subindex].usecount <= 0) | |
80 | osd_die(); | |
81 | } |