release/src-rt-6.x.4708/linux/linux-2.6.36/arch/powerpc/include/asm/vga.h

   1 #ifndef _ASM_POWERPC_VGA_H_
   2 #define _ASM_POWERPC_VGA_H_
   3
   4 #ifdef __KERNEL__
   5
   6 /*
   7  *      Access to VGA videoram
   8  *
   9  *      (c) 1998 Martin Mares <mj@ucw.cz>
  10  */
  11
  12
  13 #include <asm/io.h>
  14
  15
  16 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_MDA_CONSOLE)
  17
  18 #define VT_BUF_HAVE_RW
  19 /*
  20  *  These are only needed for supporting VGA or MDA text mode, which use little
  21  *  endian byte ordering.
  22  *  In other cases, we can optimize by using native byte ordering and
  23  *  <linux/vt_buffer.h> has already done the right job for us.
  24  */
  25
  26 static inline void scr_writew(u16 val, volatile u16 *addr)
  27 {
  28     st_le16(addr, val);
  29 }
  30
  31 static inline u16 scr_readw(volatile const u16 *addr)
  32 {
  33     return ld_le16(addr);
  34 }
  35
  36 #define VT_BUF_HAVE_MEMCPYW
  37 #define scr_memcpyw     memcpy
  38
  39 #endif /* !CONFIG_VGA_CONSOLE && !CONFIG_MDA_CONSOLE */
  40
  41 extern unsigned long vgacon_remap_base;
  42
  43 #ifdef __powerpc64__
  44 #define VGA_MAP_MEM(x,s) ((unsigned long) ioremap((x), s))
  45 #else
  46 #define VGA_MAP_MEM(x,s) (x + vgacon_remap_base)
  47 #endif
  48
  49 #define vga_readb(x) (*(x))
  50 #define vga_writeb(x,y) (*(y) = (x))
  51
  52 #endif  /* __KERNEL__ */
  53 #endif  /* _ASM_POWERPC_VGA_H_ */