LXR linux/arch/mips/include/asm/vga.h

   1/*
   2 *      Access to VGA videoram
   3 *
   4 *      (c) 1998 Martin Mares <mj@ucw.cz>
   5 */
   6#ifndef _ASM_VGA_H
   7#define _ASM_VGA_H
   8
   9#include <asm/byteorder.h>
  10
  11/*
  12 *      On the PC, we can just recalculate addresses and then
  13 *      access the videoram directly without any black magic.
  14 */
  15
  16#define VGA_MAP_MEM(x, s)       (0xb0000000L + (unsigned long)(x))
  17
  18#define vga_readb(x)    (*(x))
  19#define vga_writeb(x, y)        (*(y) = (x))
  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#undef scr_writew
  30#undef scr_readw
  31
  32static inline void scr_writew(u16 val, volatile u16 *addr)
  33{
  34        *addr = cpu_to_le16(val);
  35}
  36
  37static inline u16 scr_readw(volatile const u16 *addr)
  38{
  39        return le16_to_cpu(*addr);
  40}
  41
  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
  46
  47#endif /* _ASM_VGA_H */
  48