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

INCLUDED FROM

DEFINITIONS

1. scr_writew
2. scr_readw
3. scr_memsetw

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  *      Access to VGA videoram
   4  *
   5  *      (c) 1998 Martin Mares <mj@ucw.cz>
   6  */
   7 #ifndef _ASM_VGA_H
   8 #define _ASM_VGA_H
   9 
  10 #include <linux/string.h>
  11 #include <asm/addrspace.h>
  12 #include <asm/byteorder.h>
  13 
  14 /*
  15  *      On the PC, we can just recalculate addresses and then
  16  *      access the videoram directly without any black magic.
  17  */
  18 
  19 #define VGA_MAP_MEM(x, s)       CKSEG1ADDR(0x10000000L + (unsigned long)(x))
  20 
  21 #define vga_readb(x)    (*(x))
  22 #define vga_writeb(x, y)        (*(y) = (x))
  23 
  24 #define VT_BUF_HAVE_RW
  25 /*
  26  *  These are only needed for supporting VGA or MDA text mode, which use little
  27  *  endian byte ordering.
  28  *  In other cases, we can optimize by using native byte ordering and
  29  *  <linux/vt_buffer.h> has already done the right job for us.
  30  */
  31 
  32 #undef scr_writew
  33 #undef scr_readw
  34 
  35 static inline void scr_writew(u16 val, volatile u16 *addr)
  36 {
  37         *addr = cpu_to_le16(val);
  38 }
  39 
  40 static inline u16 scr_readw(volatile const u16 *addr)
  41 {
  42         return le16_to_cpu(*addr);
  43 }
  44 
  45 static inline void scr_memsetw(u16 *s, u16 v, unsigned int count)
  46 {
  47         memset16(s, cpu_to_le16(v), count / 2);
  48 }
  49 
  50 #define scr_memcpyw(d, s, c) memcpy(d, s, c)
  51 #define scr_memmovew(d, s, c) memmove(d, s, c)
  52 #define VT_BUF_HAVE_MEMCPYW
  53 #define VT_BUF_HAVE_MEMMOVEW
  54 #define VT_BUF_HAVE_MEMSETW
  55 
  56 #endif /* _ASM_VGA_H */