1 /*
2 * Access to VGA videoram
3 *
4 * (c) 1998 Martin Mares <mj@ucw.cz>
5 */
6
7 #ifdef __KERNEL__
8 #ifndef _LINUX_ASM_VGA_H_
9 #define _LINUX_ASM_VGA_H_
10
11 #include <asm/io.h>
12
13 #include <linux/config.h>
14
15 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_MDA_CONSOLE)
16
17 #define VT_BUF_HAVE_RW
18 /*
19 * These are only needed for supporting VGA or MDA text mode, which use little
20 * endian byte ordering.
21 * In other cases, we can optimize by using native byte ordering and
22 * <linux/vt_buffer.h> has already done the right job for us.
23 */
24
25 extern inline void scr_writew(u16 val, volatile u16 *addr)
26 {
27 st_le16(addr, val);
28 }
29
30 extern inline u16 scr_readw(volatile const u16 *addr)
31 {
32 return ld_le16(addr);
33 }
34
35 #define VT_BUF_HAVE_MEMCPYW
36 #define scr_memcpyw memcpy
37
38 #endif /* !CONFIG_VGA_CONSOLE && !CONFIG_MDA_CONSOLE */
39
40 extern unsigned long vgacon_remap_base;
41 #define VGA_MAP_MEM(x) (x + vgacon_remap_base)
42 #define vga_readb(x) (*(x))
43 #define vga_writeb(x,y) (*(y) = (x))
44
45 #endif
46 #endif /* __KERNEL__ */
47
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