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Linux/arch/mips/include/asm/vga.h

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  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 */
 48 

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