tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Access to VGA videoram
3 *
4 * (c) 1998 Martin Mares <mj@ucw.cz>
5 */
6
7#ifndef _LINUX_ASM_VGA_H_
8#define _LINUX_ASM_VGA_H_
9
10#include <asm/io.h>
11
12#define VT_BUF_HAVE_RW
13#define VT_BUF_HAVE_MEMSETW
14#define VT_BUF_HAVE_MEMCPYW
15
16extern inline void scr_writew(u16 val, volatile u16 *addr)
17{
18 if (__is_ioaddr(addr))
19 __raw_writew(val, (volatile u16 __iomem *) addr);
20 else
21 *addr = val;
22}
23
24extern inline u16 scr_readw(volatile const u16 *addr)
25{
26 if (__is_ioaddr(addr))
27 return __raw_readw((volatile const u16 __iomem *) addr);
28 else
29 return *addr;
30}
31
32extern inline void scr_memsetw(u16 *s, u16 c, unsigned int count)
33{
34 if (__is_ioaddr(s))
35 memsetw_io((u16 __iomem *) s, c, count);
36 else
37 memsetw(s, c, count);
38}
39
40/* Do not trust that the usage will be correct; analyze the arguments. */
41extern void scr_memcpyw(u16 *d, const u16 *s, unsigned int count);
42
43/* ??? These are currently only used for downloading character sets. As
44 such, they don't need memory barriers. Is this all they are intended
45 to be used for? */
46#define vga_readb(a) readb((u8 __iomem *)(a))
47#define vga_writeb(v,a) writeb(v, (u8 __iomem *)(a))
48
49#define VGA_MAP_MEM(x,s) ((unsigned long) ioremap(x, s))
50
51#endif