Viewing file:  vga.h (1.13 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/*
* Access to VGA videoram
*
* (c) 1998 Martin Mares <mj@ucw.cz>
*/
#ifndef _LINUX_ASM_VGA_H_
#define _LINUX_ASM_VGA_H_
#include <asm/io.h>
#define VT_BUF_HAVE_RW
#define VT_BUF_HAVE_MEMSETW
#define VT_BUF_HAVE_MEMCPYW
extern inline void scr_writew(u16 val, volatile u16 *addr)
{
if (__is_ioaddr((unsigned long) addr))
__raw_writew(val, (unsigned long) addr);
else
*addr = val;
}
extern inline u16 scr_readw(volatile const u16 *addr)
{
if (__is_ioaddr((unsigned long) addr))
return __raw_readw((unsigned long) addr);
else
return *addr;
}
extern inline void scr_memsetw(u16 *s, u16 c, unsigned int count)
{
if (__is_ioaddr((unsigned long) s))
memsetw_io(s, c, count);
else
memsetw(s, c, count);
}
/* Do not trust that the usage will be correct; analyze the arguments. */
extern void scr_memcpyw(u16 *d, const u16 *s, unsigned int count);
/* ??? These are currently only used for downloading character sets. As
such, they don't need memory barriers. Is this all they are intended
to be used for? */
#define vga_readb readb
#define vga_writeb writeb
#define VGA_MAP_MEM(x) ((unsigned long) ioremap((x), 0))
#endif
|