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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Access to VGA videoram
3 *
4 * (c) 1998 Martin Mares <mj@ucw.cz>
5 */
6#ifndef _ASM_VGA_H
7#define _ASM_VGA_H
8
Ralf Baechlec0ec4062005-07-11 10:37:51 +00009#include <asm/byteorder.h>
10
Linus Torvalds1da177e2005-04-16 15:20:36 -070011/*
12 * On the PC, we can just recalculate addresses and then
13 * access the videoram directly without any black magic.
14 */
15
Ralf Baechle21a151d2007-10-11 23:46:15 +010016#define VGA_MAP_MEM(x, s) (0xb0000000L + (unsigned long)(x))
Linus Torvalds1da177e2005-04-16 15:20:36 -070017
18#define vga_readb(x) (*(x))
Ralf Baechle21a151d2007-10-11 23:46:15 +010019#define vga_writeb(x, y) (*(y) = (x))
Linus Torvalds1da177e2005-04-16 15:20:36 -070020
Ralf Baechlec0ec4062005-07-11 10:37:51 +000021#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
Ralf Baechlefd2a4f12006-03-08 16:04:32 +000029#undef scr_writew
30#undef scr_readw
31
Ralf Baechlec0ec4062005-07-11 10:37:51 +000032static inline void scr_writew(u16 val, volatile u16 *addr)
33{
34 *addr = cpu_to_le16(val);
35}
36
37static inline u16 scr_readw(volatile const u16 *addr)
38{
39 return le16_to_cpu(*addr);
40}
41
42#define scr_memcpyw(d, s, c) memcpy(d, s, c)
43#define scr_memmovew(d, s, c) memmove(d, s, c)
44#define VT_BUF_HAVE_MEMCPYW
45#define VT_BUF_HAVE_MEMMOVEW
46
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#endif /* _ASM_VGA_H */