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/* ----------------------------------------------------------------------- *
*
* Copyright 2006 H. Peter Anvin - All Rights Reserved
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall
* be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* ----------------------------------------------------------------------- */
#ifndef LIB_SYS_VESA_FILL_H
#define LIB_SYS_VESA_FILL_H
#include "video.h"
/* Fill a number of characters. */
static inline struct vesa_char *vesacon_fill(struct vesa_char *ptr,
struct vesa_char fill,
unsigned int count)
{
switch (sizeof(struct vesa_char)) {
case 1:
asm volatile("cld; rep; stosb"
: "+D" (ptr), "+c" (count)
: "a" (fill)
: "memory");
break;
case 2:
asm volatile("cld; rep; stosw"
: "+D" (ptr), "+c" (count)
: "a" (fill)
: "memory");
break;
case 4:
asm volatile("cld; rep; stosl"
: "+D" (ptr), "+c" (count)
: "a" (fill)
: "memory");
break;
default:
while (count--)
*ptr++ = fill;
break;
}
return ptr;
}
#endif /* LIB_SYS_VESA_FILL_H */
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