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authorAl Viro <viro@zeniv.linux.org.uk>2008-08-17 21:05:42 -0400
committerH. Peter Anvin <hpa@zytor.com>2008-10-23 01:55:20 -0400
commitbb8985586b7a906e116db835c64773b7a7d51663 (patch)
treede93ae58e88cc563d95cc124a73f3930594c6100 /arch/x86/include/asm/bios_ebda.h
parent8ede0bdb63305d3353efd97e9af6210afb05734e (diff)
x86, um: ... and asm-x86 move
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/include/asm/bios_ebda.h')
-rw-r--r--arch/x86/include/asm/bios_ebda.h36
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/x86/include/asm/bios_ebda.h b/arch/x86/include/asm/bios_ebda.h
new file mode 100644
index 000000000000..79b4b88505d7
--- /dev/null
+++ b/arch/x86/include/asm/bios_ebda.h
@@ -0,0 +1,36 @@
1#ifndef ASM_X86__BIOS_EBDA_H
2#define ASM_X86__BIOS_EBDA_H
3
4#include <asm/io.h>
5
6/*
7 * there is a real-mode segmented pointer pointing to the
8 * 4K EBDA area at 0x40E.
9 */
10static inline unsigned int get_bios_ebda(void)
11{
12 unsigned int address = *(unsigned short *)phys_to_virt(0x40E);
13 address <<= 4;
14 return address; /* 0 means none */
15}
16
17void reserve_ebda_region(void);
18
19#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
20/*
21 * This is obviously not a great place for this, but we want to be
22 * able to scatter it around anywhere in the kernel.
23 */
24void check_for_bios_corruption(void);
25void start_periodic_check_for_corruption(void);
26#else
27static inline void check_for_bios_corruption(void)
28{
29}
30
31static inline void start_periodic_check_for_corruption(void)
32{
33}
34#endif
35
36#endif /* ASM_X86__BIOS_EBDA_H */