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