LXR linux/arch/mips/include/asm/vga.h

   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
  35static inline void scr_writew(u16 val, volatile u16 *addr)
  36{
  37        *addr = cpu_to_le16(val);
  38}
  39
  40static inline u16 scr_readw(volatile const u16 *addr)
  41{
  42        return le16_to_cpu(*addr);
  43}
  44
  45static 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 */
  57