Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | ||
258e1e73 | 9 | #include <asm/addrspace.h> |
c0ec406c RB |
10 | #include <asm/byteorder.h> |
11 | ||
1da177e4 LT |
12 | /* |
13 | * On the PC, we can just recalculate addresses and then | |
14 | * access the videoram directly without any black magic. | |
15 | */ | |
16 | ||
258e1e73 | 17 | #define VGA_MAP_MEM(x, s) CKSEG1ADDR(0x10000000L + (unsigned long)(x)) |
1da177e4 LT |
18 | |
19 | #define vga_readb(x) (*(x)) | |
21a151d8 | 20 | #define vga_writeb(x, y) (*(y) = (x)) |
1da177e4 | 21 | |
c0ec406c RB |
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 | ||
fd2a4f11 RB |
30 | #undef scr_writew |
31 | #undef scr_readw | |
32 | ||
c0ec406c RB |
33 | static inline void scr_writew(u16 val, volatile u16 *addr) |
34 | { | |
35 | *addr = cpu_to_le16(val); | |
36 | } | |
37 | ||
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 | ||
1da177e4 | 48 | #endif /* _ASM_VGA_H */ |