1 /* ----------------------------------------------------------------------- *
2 *
3 * Copyright 2006-2008 H. Peter Anvin - All Rights Reserved
4 *
5 * Permission is hereby granted, free of charge, to any person
6 * obtaining a copy of this software and associated documentation
7 * files (the "Software"), to deal in the Software without
8 * restriction, including without limitation the rights to use,
9 * copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom
11 * the Software is furnished to do so, subject to the following
12 * conditions:
13 *
14 * The above copyright notice and this permission notice shall
15 * be included in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
19 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
21 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
22 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
23 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24 * OTHER DEALINGS IN THE SOFTWARE.
25 *
26 * ----------------------------------------------------------------------- */
27
28 #ifndef LIB_SYS_VESA_FILL_H
29 #define LIB_SYS_VESA_FILL_H
30
31 #include "video.h"
32
33 /* Fill a number of characters. */
vesacon_fill(struct vesa_char * ptr,struct vesa_char fill,unsigned int count)34 static inline struct vesa_char *vesacon_fill(struct vesa_char *ptr,
35 struct vesa_char fill,
36 unsigned int count)
37 {
38 switch (sizeof(struct vesa_char)) {
39 case 1:
40 asm volatile ("rep; stosb":"+D" (ptr), "+c"(count)
41 :"a"(fill)
42 :"memory");
43 break;
44 case 2:
45 asm volatile ("rep; stosw":"+D" (ptr), "+c"(count)
46 :"a"(fill)
47 :"memory");
48 break;
49 case 4:
50 asm volatile ("rep; stosl":"+D" (ptr), "+c"(count)
51 :"a"(fill)
52 :"memory");
53 break;
54 default:
55 while (count--)
56 *ptr++ = fill;
57 break;
58 }
59
60 return ptr;
61 }
62
63 #endif /* LIB_SYS_VESA_FILL_H */
64