linux-stable/include/asm-alpha/vga.h
Bjorn Helgaas 4f1bcaf094 [PATCH] vgacon: make VGA_MAP_MEM take size, remove extra use
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>
2006-06-22 15:05:58 -07:00

51 lines
1.2 KiB
C

/*
* 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(addr))
__raw_writew(val, (volatile u16 __iomem *) addr);
else
*addr = val;
}
extern inline u16 scr_readw(volatile const u16 *addr)
{
if (__is_ioaddr(addr))
return __raw_readw((volatile const u16 __iomem *) addr);
else
return *addr;
}
extern inline void scr_memsetw(u16 *s, u16 c, unsigned int count)
{
if (__is_ioaddr(s))
memsetw_io((u16 __iomem *) 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(a) readb((u8 __iomem *)(a))
#define vga_writeb(v,a) writeb(v, (u8 __iomem *)(a))
#define VGA_MAP_MEM(x,s) ((unsigned long) ioremap(x, s))
#endif