cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

atafb_mfb.c (2242B)

      1/*
      2 *  linux/drivers/video/mfb.c -- Low level frame buffer operations for
      3 *				 monochrome
      4 *
      5 *	Created 5 Apr 1997 by Geert Uytterhoeven
      6 *
      7 *  This file is subject to the terms and conditions of the GNU General Public
      8 *  License.  See the file COPYING in the main directory of this archive for
      9 *  more details.
     10 */
     11
     12#include <linux/string.h>
     13#include <linux/fb.h>
     14
     15#include "atafb.h"
     16#include "atafb_utils.h"
     17
     18
     19    /*
     20     *  Monochrome
     21     */
     22
     23void atafb_mfb_copyarea(struct fb_info *info, u_long next_line,
     24			int sy, int sx, int dy, int dx,
     25			int height, int width)
     26{
     27	u8 *src, *dest;
     28	u_int rows;
     29
     30	if (sx == 0 && dx == 0 && width == next_line) {
     31		src = (u8 *)info->screen_base + sy * (width >> 3);
     32		dest = (u8 *)info->screen_base + dy * (width >> 3);
     33		fb_memmove(dest, src, height * (width >> 3));
     34	} else if (dy <= sy) {
     35		src = (u8 *)info->screen_base + sy * next_line + (sx >> 3);
     36		dest = (u8 *)info->screen_base + dy * next_line + (dx >> 3);
     37		for (rows = height; rows--;) {
     38			fb_memmove(dest, src, width >> 3);
     39			src += next_line;
     40			dest += next_line;
     41		}
     42	} else {
     43		src = (u8 *)info->screen_base + (sy + height - 1) * next_line + (sx >> 3);
     44		dest = (u8 *)info->screen_base + (dy + height - 1) * next_line + (dx >> 3);
     45		for (rows = height; rows--;) {
     46			fb_memmove(dest, src, width >> 3);
     47			src -= next_line;
     48			dest -= next_line;
     49		}
     50	}
     51}
     52
     53void atafb_mfb_fillrect(struct fb_info *info, u_long next_line, u32 color,
     54			int sy, int sx, int height, int width)
     55{
     56	u8 *dest;
     57	u_int rows;
     58
     59	dest = (u8 *)info->screen_base + sy * next_line + (sx >> 3);
     60
     61	if (sx == 0 && width == next_line) {
     62		if (color)
     63			fb_memset255(dest, height * (width >> 3));
     64		else
     65			fb_memclear(dest, height * (width >> 3));
     66	} else {
     67		for (rows = height; rows--; dest += next_line) {
     68			if (color)
     69				fb_memset255(dest, width >> 3);
     70			else
     71				fb_memclear_small(dest, width >> 3);
     72		}
     73	}
     74}
     75
     76void atafb_mfb_linefill(struct fb_info *info, u_long next_line,
     77			int dy, int dx, u32 width,
     78			const u8 *data, u32 bgcolor, u32 fgcolor)
     79{
     80	u8 *dest;
     81	u_int rows;
     82
     83	dest = (u8 *)info->screen_base + dy * next_line + (dx >> 3);
     84
     85	for (rows = width / 8; rows--; /* check margins */ ) {
     86		// use fast_memmove or fb_memmove
     87		*dest++ = *data++;
     88	}
     89}