lxdream 0.9.1| filename | src/watch.c |
| changeset | 6:6e3663e58565 |
| prev | 2:42349f6ea216 |
| next | 480:d28c2992f5ee |
| author | nkeynes |
| date | Wed Jan 03 09:01:51 2007 +0000 (17 years ago) |
| permissions | -rw-r--r-- |
| last change | Implement the main CRTC registers, along with the sync status register. Timings are now pretty close to the real thing. |
| view | annotate | diff | log | raw |
1 #include <stdlib.h>
2 #include "mem.h"
4 struct watch_point {
5 uint32_t start;
6 uint32_t end;
7 int flags;
8 };
10 struct watch_point *watch_arr = NULL;
11 int watch_count = 0, watch_capacity = 0;
14 watch_point_t mem_new_watch( uint32_t start, uint32_t end, int flags )
15 {
16 int num;
17 if( watch_arr == NULL ) {
18 watch_capacity = 10;
19 watch_arr = calloc( sizeof(struct watch_point), watch_capacity );
20 num = 0;
21 } else if( watch_count == watch_capacity ) {
22 struct watch_point *tmp = realloc( watch_arr, sizeof(struct watch_point) * watch_capacity * 2 );
23 if( tmp == NULL )
24 return NULL;
25 watch_arr = tmp;
26 memset( &watch_arr[watch_capacity], 0, sizeof( struct watch_point ) * watch_capacity );
27 num = watch_capacity;
28 watch_capacity *= 2;
29 } else {
30 for( num=0; num<watch_capacity; num++ ) {
31 if( watch_arr[num].flags == 0 )
32 break;
33 }
34 }
35 watch_arr[num].start = start & 0x1FFFFFFF;
36 watch_arr[num].end = end & 0x1FFFFFFF;
37 watch_arr[num].flags = flags;
38 watch_count++;
39 return &watch_arr[num];
40 }
42 void mem_delete_watch( watch_point_t watch )
43 {
44 if( watch_arr == NULL )
45 return;
46 int num = watch - watch_arr;
47 if( num < 0 || num >= watch_capacity )
48 return;
49 watch->start = watch->end = 0;
50 watch->flags = 0;
51 watch_count--;
52 }
55 watch_point_t mem_is_watched( uint32_t addr, int size, int op )
56 {
57 int i, count;
58 addr &= 0x1FFFFFFF;
59 for( i=0, count=0; count< watch_count; i++ ) {
60 if( watch_arr[i].flags == 0 )
61 continue;
62 count++;
63 if( watch_arr[i].flags & op &&
64 watch_arr[i].start < addr+size &&
65 watch_arr[i].end >= addr ) {
66 return &watch_arr[i];
67 }
68 }
69 return NULL;
70 }
.