1/*
 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
 
 9#include <asm/byteorder.h>
10
11/*
12 *	On the PC, we can just recalculate addresses and then
13 *	access the videoram directly without any black magic.
14 */
15
16#define VGA_MAP_MEM(x, s)	(0xb0000000L + (unsigned long)(x))
17
18#define vga_readb(x)	(*(x))
19#define vga_writeb(x, y)	(*(y) = (x))
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
29#undef scr_writew
30#undef scr_readw
31
32static 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
47#endif /* _ASM_VGA_H */

 1/*
 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
 9#include <asm/addrspace.h>
10#include <asm/byteorder.h>
11
12/*
13 *	On the PC, we can just recalculate addresses and then
14 *	access the videoram directly without any black magic.
15 */
16
17#define VGA_MAP_MEM(x, s)	CKSEG1ADDR(0x10000000L + (unsigned long)(x))
18
19#define vga_readb(x)	(*(x))
20#define vga_writeb(x, y)	(*(y) = (x))
21
22#define VT_BUF_HAVE_RW
23/*
24 *  These are only needed for supporting VGA or MDA text mode, which use little
25 *  endian byte ordering.
26 *  In other cases, we can optimize by using native byte ordering and
27 *  <linux/vt_buffer.h> has already done the right job for us.
28 */
29
30#undef scr_writew
31#undef scr_readw
32
33static inline void scr_writew(u16 val, volatile u16 *addr)
34{
35	*addr = cpu_to_le16(val);
36}
37
38static inline u16 scr_readw(volatile const u16 *addr)
39{
40	return le16_to_cpu(*addr);
41}
42
43#define scr_memcpyw(d, s, c) memcpy(d, s, c)
44#define scr_memmovew(d, s, c) memmove(d, s, c)
45#define VT_BUF_HAVE_MEMCPYW
46#define VT_BUF_HAVE_MEMMOVEW
47
48#endif /* _ASM_VGA_H */