2 * Access to VGA videoram
4 * (c) 1998 Martin Mares <mj@ucw.cz>
7 #ifndef _LINUX_ASM_VGA_H_
8 #define _LINUX_ASM_VGA_H_
12 #define VT_BUF_HAVE_RW
13 #define VT_BUF_HAVE_MEMSETW
14 #define VT_BUF_HAVE_MEMCPYW
16 extern inline void scr_writew(u16 val, volatile u16 *addr)
18 if (__is_ioaddr((unsigned long) addr))
19 __raw_writew(val, (unsigned long) addr);
24 extern inline u16 scr_readw(volatile const u16 *addr)
26 if (__is_ioaddr((unsigned long) addr))
27 return __raw_readw((unsigned long) addr);
32 extern inline void scr_memsetw(u16 *s, u16 c, unsigned int count)
34 if (__is_ioaddr((unsigned long) s))
35 memsetw_io(s, c, count);
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);
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
46 #define vga_readb readb
47 #define vga_writeb writeb
49 #define VGA_MAP_MEM(x) ((unsigned long) ioremap((x), 0))