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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Access to VGA videoram | |
3 | * | |
4 | * (c) 1998 Martin Mares <mj@ucw.cz> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #ifndef _LINUX_ASM_VGA_H_ | |
13 | #define _LINUX_ASM_VGA_H_ | |
14 | ||
15 | #include <asm/io.h> | |
16 | ||
17 | #include <linux/config.h> | |
18 | ||
19 | #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_MDA_CONSOLE) | |
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 | static inline void scr_writew(u16 val, volatile u16 *addr) | |
30 | { | |
31 | st_le16(addr, val); | |
32 | } | |
33 | ||
34 | static inline u16 scr_readw(volatile const u16 *addr) | |
35 | { | |
36 | return ld_le16(addr); | |
37 | } | |
38 | ||
39 | #define VT_BUF_HAVE_MEMCPYW | |
40 | #define scr_memcpyw memcpy | |
41 | ||
42 | #endif /* !CONFIG_VGA_CONSOLE && !CONFIG_MDA_CONSOLE */ | |
43 | ||
44 | extern unsigned long vgacon_remap_base; | |
45 | #define VGA_MAP_MEM(x) ((unsigned long) ioremap((x), 0)) | |
46 | ||
47 | #define vga_readb(x) (*(x)) | |
48 | #define vga_writeb(x,y) (*(y) = (x)) | |
49 | ||
50 | #endif |