mirror of
https://github.com/torvalds/linux.git
synced 2024-11-18 01:51:53 +00:00
4f1bcaf094
VGA_MAP_MEM translates to ioremap() on some architectures. It makes sense to do this to vga_vram_base, because we're going to access memory between vga_vram_base and vga_vram_end. But it doesn't really make sense to map starting at vga_vram_end, because we aren't going to access memory starting there. On ia64, which always has to be different, ioremapping vga_vram_end gives you something completely incompatible with ioremapped vga_vram_start, so vga_vram_size ends up being nonsense. As a bonus, we often know the size up front, so we can use ioremap() correctly, rather than giving it a zero size. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
21 lines
379 B
C
21 lines
379 B
C
/*
|
|
* Access to VGA videoram
|
|
*
|
|
* (c) 1998 Martin Mares <mj@ucw.cz>
|
|
*/
|
|
|
|
#ifndef _LINUX_ASM_VGA_H_
|
|
#define _LINUX_ASM_VGA_H_
|
|
|
|
/*
|
|
* On the PC, we can just recalculate addresses and then
|
|
* access the videoram directly without any black magic.
|
|
*/
|
|
|
|
#define VGA_MAP_MEM(x,s) (unsigned long)phys_to_virt(x)
|
|
|
|
#define vga_readb(x) (*(x))
|
|
#define vga_writeb(x,y) (*(y) = (x))
|
|
|
|
#endif
|