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
scr_writew(u16 val,volatile u16 * addr)33 static inline void scr_writew(u16 val, volatile u16 *addr)
34 {
35 *addr = cpu_to_le16(val);
36 }
37
scr_readw(volatile const u16 * addr)38 static 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 */
49