linux/drivers/video/fbdev/core/syscopyarea.c

/*
 *  Generic Bit Block Transfer for frame buffers located in system RAM with
 *  packed pixels of any depth.
 *
 *  Based almost entirely from cfbcopyarea.c (which is based almost entirely
 *  on Geert Uytterhoeven's copyarea routine)
 *
 *      Copyright (C)  2007 Antonino Daplas <[email protected]>
 *
 *  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/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/fb.h>
#include <asm/types.h>
#include <asm/io.h>
#include "fb_draw.h"

    /*
     *  Generic bitwise copy algorithm
     */

static void
bitcpy(struct fb_info *p, unsigned long *dst, unsigned dst_idx,
	const unsigned long *src, unsigned src_idx, int bits, unsigned n)
{ … }

    /*
     *  Generic bitwise copy algorithm, operating backward
     */

static void
bitcpy_rev(struct fb_info *p, unsigned long *dst, unsigned dst_idx,
	   const unsigned long *src, unsigned src_idx, unsigned bits,
	   unsigned n)
{ … }

void sys_copyarea(struct fb_info *p, const struct fb_copyarea *area)
{ … }

EXPORT_SYMBOL(…);

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;