blob: c09849743f454acaea4340f3be5bdeae63224ffb [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Access to VGA videoram
3 *
4 * (c) 1998 Martin Mares <mj@ucw.cz>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12#ifndef _LINUX_ASM_VGA_H_
13#define _LINUX_ASM_VGA_H_
14
15#include <asm/io.h>
16
17#include <linux/config.h>
18
19#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_MDA_CONSOLE)
20
21#define VT_BUF_HAVE_RW
22/*
23 * These are only needed for supporting VGA or MDA text mode, which use little
24 * endian byte ordering.
25 * In other cases, we can optimize by using native byte ordering and
26 * <linux/vt_buffer.h> has already done the right job for us.
27 */
28
29static inline void scr_writew(u16 val, volatile u16 *addr)
30{
31 st_le16(addr, val);
32}
33
34static inline u16 scr_readw(volatile const u16 *addr)
35{
36 return ld_le16(addr);
37}
38
39#define VT_BUF_HAVE_MEMCPYW
40#define scr_memcpyw memcpy
41
42#endif /* !CONFIG_VGA_CONSOLE && !CONFIG_MDA_CONSOLE */
43
44extern unsigned long vgacon_remap_base;
45#define VGA_MAP_MEM(x) ((unsigned long) ioremap((x), 0))
46
47#define vga_readb(x) (*(x))
48#define vga_writeb(x,y) (*(y) = (x))
49
50#endif