linux/include/asm-generic/vga.h
Arnd Bergmann ae49e80795 asm-generic: add legacy I/O header files
The dma.h, hw_irq.h, serial.h and timex.h files originally
described PC-style i8237, i8259A, i8250, i8253 and i8255 chips
as well as the VGA style text mode graphics.

Modern architectures live happily without these specific
interfaces, but a few definitions from these headers keep
getting used in common code.

The new generic headers are what most architectures use
anyway nowadays, just implementing the minimal definitions.

Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2009-06-11 21:02:42 +02:00

24 lines
548 B
C

/*
* Access to VGA videoram
*
* (c) 1998 Martin Mares <mj@ucw.cz>
*/
#ifndef __ASM_GENERIC_VGA_H
#define __ASM_GENERIC_VGA_H
/*
* On most architectures that support VGA, we can just
* recalculate addresses and then access the videoram
* directly without any black magic.
*
* Everyone else needs to ioremap the address and use
* proper I/O accesses.
*/
#ifndef VGA_MAP_MEM
#define VGA_MAP_MEM(x, s) (unsigned long)phys_to_virt(x)
#endif
#define vga_readb(x) (*(x))
#define vga_writeb(x, y) (*(y) = (x))
#endif /* _ASM_GENERIC_VGA_H */