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
  32 static inline void scr_writew(u16 val, volatile u16 *addr)
  33 {
  34         *addr = cpu_to_le16(val);
  35 }
  36
  37 static 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 */