1/* 2 * Access to VGA videoram 3 * 4 * (c) 1998 Martin Mares <mj@ucw.cz> 5 * 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. 10 */ 11 12#ifndef _LINUX_ASM_VGA_H_ 13#define _LINUX_ASM_VGA_H_ 14 15#include <asm/io.h> 16 17#include <linux/config.h> 18 19#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_MDA_CONSOLE) 20 21#define VT_BUF_HAVE_RW 22/* 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. 27 */ 28 29static inline void scr_writew(u16 val, volatile u16 *addr) 30{ 31 st_le16(addr, val); 32} 33 34static inline u16 scr_readw(volatile const u16 *addr) 35{ 36 return ld_le16(addr); 37} 38 39#define VT_BUF_HAVE_MEMCPYW 40#define scr_memcpyw memcpy 41 42#endif /* !CONFIG_VGA_CONSOLE && !CONFIG_MDA_CONSOLE */ 43 44extern unsigned long vgacon_remap_base; 45#define VGA_MAP_MEM(x) ((unsigned long) ioremap((x), 0)) 46 47#define vga_readb(x) (*(x)) 48#define vga_writeb(x,y) (*(y) = (x)) 49 50#endif 51