2 * Access to VGA videoram
4 * (c) 1998 Martin Mares <mj@ucw.cz>
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
12 #ifndef _LINUX_ASM_VGA_H_
13 #define _LINUX_ASM_VGA_H_
17 #include <linux/config.h>
19 #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_MDA_CONSOLE)
21 #define VT_BUF_HAVE_RW
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.
29 static inline void scr_writew(u16 val, volatile u16 *addr)
34 static inline u16 scr_readw(volatile const u16 *addr)
39 #define VT_BUF_HAVE_MEMCPYW
40 #define scr_memcpyw memcpy
42 #endif /* !CONFIG_VGA_CONSOLE && !CONFIG_MDA_CONSOLE */
44 extern unsigned long vgacon_remap_base;
45 #define VGA_MAP_MEM(x) ((unsigned long) ioremap((x), 0))
47 #define vga_readb(x) (*(x))
48 #define vga_writeb(x,y) (*(y) = (x))