arch/powerpc/include/asm/vga.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_POWERPC_VGA_H_
   3 #define _ASM_POWERPC_VGA_H_
   4
   5 #ifdef __KERNEL__
   6
   7 /*
   8  *      Access to VGA videoram
   9  *
  10  *      (c) 1998 Martin Mares <mj@ucw.cz>
  11  */
  12
  13
  14 #include <asm/io.h>
  15
  16
  17 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_MDA_CONSOLE)
  18
  19 #define VT_BUF_HAVE_RW
  20 /*
  21  *  These are only needed for supporting VGA or MDA text mode, which use little
  22  *  endian byte ordering.
  23  *  In other cases, we can optimize by using native byte ordering and
  24  *  <linux/vt_buffer.h> has already done the right job for us.
  25  */
  26
  27 static inline void scr_writew(u16 val, volatile u16 *addr)
  28 {
  29         *addr = cpu_to_le16(val);
  30 }
  31
  32 static inline u16 scr_readw(volatile const u16 *addr)
  33 {
  34         return le16_to_cpu(*addr);
  35 }
  36
  37 #define VT_BUF_HAVE_MEMSETW
  38 static inline void scr_memsetw(u16 *s, u16 v, unsigned int n)
  39 {
  40         memset16(s, cpu_to_le16(v), n / 2);
  41 }
  42
  43 #define VT_BUF_HAVE_MEMCPYW
  44 #define VT_BUF_HAVE_MEMMOVEW
  45 #define scr_memcpyw     memcpy
  46 #define scr_memmovew    memmove
  47
  48 #endif /* !CONFIG_VGA_CONSOLE && !CONFIG_MDA_CONSOLE */
  49
  50 #ifdef __powerpc64__
  51 #define VGA_MAP_MEM(x,s) ((unsigned long) ioremap((x), s))
  52 #else
  53 #define VGA_MAP_MEM(x,s) (x)
  54 #endif
  55
  56 #define vga_readb(x) (*(x))
  57 #define vga_writeb(x,y) (*(y) = (x))
  58
  59 #endif  /* __KERNEL__ */
  60 #endif  /* _ASM_POWERPC_VGA_H_ */