/* *  linux/drivers/video/mfb.c -- Low level frame buffer operations for *				 monochrome * *	Created 5 Apr 1997 by Geert Uytterhoeven * *  This file is subject to the terms and conditions of the GNU General Public *  License.  See the file COPYING in the main directory of this archive for *  more details. */ #include <linux/string.h>#include <linux/fb.h> #include "atafb.h"#include "atafb_utils.h"      /*     *  Monochrome     */ void atafb_mfb_copyarea(struct fb_info *info, u_long next_line,			int sy, int sx, int dy, int dx,			int height, int width){	u8 *src, *dest;	u_int rows; 	if (sx == 0 && dx == 0 && width == next_line) {		src = (u8 *)info->screen_base + sy * (width >> 3);		dest = (u8 *)info->screen_base + dy * (width >> 3);		fb_memmove(dest, src, height * (width >> 3));	} else if (dy <= sy) {		src = (u8 *)info->screen_base + sy * next_line + (sx >> 3);		dest = (u8 *)info->screen_base + dy * next_line + (dx >> 3);		for (rows = height; rows--;) {			fb_memmove(dest, src, width >> 3);			src += next_line;			dest += next_line;		}	} else {		src = (u8 *)info->screen_base + (sy + height - 1) * next_line + (sx >> 3);		dest = (u8 *)info->screen_base + (dy + height - 1) * next_line + (dx >> 3);		for (rows = height; rows--;) {			fb_memmove(dest, src, width >> 3);			src -= next_line;			dest -= next_line;		}	}} void atafb_mfb_fillrect(struct fb_info *info, u_long next_line, u32 color,			int sy, int sx, int height, int width){	u8 *dest;	u_int rows; 	dest = (u8 *)info->screen_base + sy * next_line + (sx >> 3); 	if (sx == 0 && width == next_line) {		if (color)			fb_memset255(dest, height * (width >> 3));		else			fb_memclear(dest, height * (width >> 3));	} else {		for (rows = height; rows--; dest += next_line) {			if (color)				fb_memset255(dest, width >> 3);			else				fb_memclear_small(dest, width >> 3);		}	}} void atafb_mfb_linefill(struct fb_info *info, u_long next_line,			int dy, int dx, u32 width,			const u8 *data, u32 bgcolor, u32 fgcolor){	u8 *dest;	u_int rows; 	dest = (u8 *)info->screen_base + dy * next_line + (dx >> 3); 	for (rows = width / 8; rows--; /* check margins */ ) {		// use fast_memmove or fb_memmove		*dest++ = *data++;	}}