target/linux/ubicom32/files/arch/ubicom32/include/asm/vga.h

   1 /*
   2  * arch/ubicom32/include/asm/vga.h
   3  *   Ubicom32 low level  VGA/frame buffer definitions.
   4  *
   5  * (C) Copyright 2009, Ubicom, Inc.
   6  * (c) 1998 Martin Mares <mj@ucw.cz>
   7  *
   8  * This file is part of the Ubicom32 Linux Kernel Port.
   9  *
  10  * The Ubicom32 Linux Kernel Port is free software: you can redistribute
  11  * it and/or modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation, either version 2 of the
  13  * License, or (at your option) any later version.
  14  *
  15  * The Ubicom32 Linux Kernel Port is distributed in the hope that it
  16  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  17  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  18  * the GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with the Ubicom32 Linux Kernel Port.  If not,
  22  * see <http://www.gnu.org/licenses/>.
  23  *
  24  * Ubicom32 implementation derived from (with many thanks):
  25  *   arch/m68knommu
  26  *   arch/blackfin
  27  *   arch/parisc
  28  */
  29
  30 #ifndef _ASM_UBICOM32_VGA_H
  31 #define _ASM_UBICOM32_VGA_H
  32
  33 #include <asm/byteorder.h>
  34
  35 /*
  36  *      On the PC, we can just recalculate addresses and then
  37  *      access the videoram directly without any black magic.
  38  */
  39
  40 #define VGA_MAP_MEM(x, s)       (0xb0000000L + (unsigned long)(x))
  41
  42 #define vga_readb(x)    (*(x))
  43 #define vga_writeb(x, y)        (*(y) = (x))
  44
  45 #define VT_BUF_HAVE_RW
  46 /*
  47  *  These are only needed for supporting VGA or MDA text mode, which use little
  48  *  endian byte ordering.
  49  *  In other cases, we can optimize by using native byte ordering and
  50  *  <linux/vt_buffer.h> has already done the right job for us.
  51  */
  52
  53 #undef scr_writew
  54 #undef scr_readw
  55
  56 static inline void scr_writew(u16 val, volatile u16 *addr)
  57 {
  58         *addr = cpu_to_le16(val);
  59 }
  60
  61 static inline u16 scr_readw(volatile const u16 *addr)
  62 {
  63         return le16_to_cpu(*addr);
  64 }
  65
  66 #define scr_memcpyw(d, s, c) memcpy(d, s, c)
  67 #define scr_memmovew(d, s, c) memmove(d, s, c)
  68 #define VT_BUF_HAVE_MEMCPYW
  69 #define VT_BUF_HAVE_MEMMOVEW
  70
  71 #endif /* _ASM_UBICOM32_VGA_H */