2 * Access to VGA videoram
4 * (c) 1998 Martin Mares <mj@ucw.cz>
9 #include <asm/byteorder.h>
12 * On the PC, we can just recalculate addresses and then
13 * access the videoram directly without any black magic.
16 #define VGA_MAP_MEM(x,s) (0xb0000000L + (unsigned long)(x))
18 #define vga_readb(x) (*(x))
19 #define vga_writeb(x,y) (*(y) = (x))
21 #define VT_BUF_HAVE_RW
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.
32 static inline void scr_writew(u16 val, volatile u16 *addr)
34 *addr = cpu_to_le16(val);
37 static inline u16 scr_readw(volatile const u16 *addr)
39 return le16_to_cpu(*addr);
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
47 #endif /* _ASM_VGA_H */