projects / deliverable / linux.git / blame
| 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 | ||
| c0ec406c RB |
9 | #include <asm/byteorder.h> |
| 10 | ||
| 1da177e4 LT |
11 | /* |
| 12 | * On the PC, we can just recalculate addresses and then | |
| 13 | * access the videoram directly without any black magic. | |
| 14 | */ | |
| 15 | ||
| 21a151d8 | 16 | #define VGA_MAP_MEM(x, s) (0xb0000000L + (unsigned long)(x)) |
| 1da177e4 LT |
17 | |
| 18 | #define vga_readb(x) (*(x)) | |
| 21a151d8 | 19 | #define vga_writeb(x, y) (*(y) = (x)) |
| 1da177e4 | 20 | |
| c0ec406c RB |
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 | ||
| fd2a4f11 RB |
29 | #undef scr_writew |
| 30 | #undef scr_readw | |
| 31 | ||
| c0ec406c RB |
32 | static inline void scr_writew(u16 val, volatile u16 *addr) |
| 33 | { | |
| 34 | *addr = cpu_to_le16(val); | |
| 35 | } | |
| 36 | ||
| 37 | static 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 | ||
| 1da177e4 | 47 | #endif /* _ASM_VGA_H */ |