include/asm-ppc/vga.h

   1 /*
   2  *      Access to VGA videoram
   3  *
   4  *      (c) 1998 Martin Mares <mj@ucw.cz>
   5  */
   6
   7 #ifdef __KERNEL__
   8 #ifndef _LINUX_ASM_VGA_H_
   9 #define _LINUX_ASM_VGA_H_
  10
  11 #include <asm/io.h>
  12
  13 #include <linux/config.h>
  14
  15 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_MDA_CONSOLE)
  16
  17 #define VT_BUF_HAVE_RW
  18 /*
  19  *  These are only needed for supporting VGA or MDA text mode, which use little
  20  *  endian byte ordering.
  21  *  In other cases, we can optimize by using native byte ordering and
  22  *  <linux/vt_buffer.h> has already done the right job for us.
  23  */
  24
  25 extern inline void scr_writew(u16 val, volatile u16 *addr)
  26 {
  27     st_le16(addr, val);
  28 }
  29
  30 extern inline u16 scr_readw(volatile const u16 *addr)
  31 {
  32     return ld_le16(addr);
  33 }
  34
  35 #define VT_BUF_HAVE_MEMCPYW
  36 #define scr_memcpyw     memcpy
  37
  38 #endif /* !CONFIG_VGA_CONSOLE && !CONFIG_MDA_CONSOLE */
  39
  40 extern unsigned long vgacon_remap_base;
  41 #define VGA_MAP_MEM(x) (x + vgacon_remap_base)
  42 #define vga_readb(x) (*(x))
  43 #define vga_writeb(x,y) (*(y) = (x))
  44
  45 #endif
  46 #endif /* __KERNEL__ */