1 /*
2 * Access to VGA videoram
3 *
4 * (c) 1998 Martin Mares <mj@ucw.cz>
5 */
6
7 #ifndef _LINUX_ASM_VGA_H_
8 #define _LINUX_ASM_VGA_H_
9
10 #include <asm/io.h>
11
12 #define VT_BUF_HAVE_RW
13 #define VT_BUF_HAVE_MEMSETW
14 #define VT_BUF_HAVE_MEMCPYW
15
scr_writew(u16 val,volatile u16 * addr)16 extern inline void scr_writew(u16 val, volatile u16 *addr)
17 {
18 if (__is_ioaddr((unsigned long) addr))
19 __raw_writew(val, (unsigned long) addr);
20 else
21 *addr = val;
22 }
23
scr_readw(volatile const u16 * addr)24 extern inline u16 scr_readw(volatile const u16 *addr)
25 {
26 if (__is_ioaddr((unsigned long) addr))
27 return __raw_readw((unsigned long) addr);
28 else
29 return *addr;
30 }
31
scr_memsetw(u16 * s,u16 c,unsigned int count)32 extern inline void scr_memsetw(u16 *s, u16 c, unsigned int count)
33 {
34 if (__is_ioaddr((unsigned long) s))
35 memsetw_io(s, c, count);
36 else
37 memsetw(s, c, count);
38 }
39
40 /* Do not trust that the usage will be correct; analyze the arguments. */
41 extern void scr_memcpyw(u16 *d, const u16 *s, unsigned int count);
42
43 /* ??? These are currently only used for downloading character sets. As
44 such, they don't need memory barriers. Is this all they are intended
45 to be used for? */
46 #define vga_readb readb
47 #define vga_writeb writeb
48
49 #define VGA_MAP_MEM(x) ((unsigned long) ioremap((x), 0))
50
51 #endif
52