Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1965aae3 PA |
2 | #ifndef _ASM_X86_BIOS_EBDA_H |
3 | #define _ASM_X86_BIOS_EBDA_H | |
1da177e4 | 4 | |
2c0903f2 AM |
5 | #include <asm/io.h> |
6 | ||
1da177e4 | 7 | /* |
f548ccd4 | 8 | * Returns physical address of EBDA. Returns 0 if there is no EBDA. |
1da177e4 LT |
9 | */ |
10 | static inline unsigned int get_bios_ebda(void) | |
11 | { | |
f548ccd4 MW |
12 | /* |
13 | * There is a real-mode segmented pointer pointing to the | |
14 | * 4K EBDA area at 0x40E. | |
15 | */ | |
1da177e4 LT |
16 | unsigned int address = *(unsigned short *)phys_to_virt(0x40E); |
17 | address <<= 4; | |
18 | return address; /* 0 means none */ | |
19 | } | |
20 | ||
edce2121 | 21 | void reserve_bios_regions(void); |
0c51a965 | 22 | |
46eaa670 IM |
23 | #ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION |
24 | /* | |
25 | * This is obviously not a great place for this, but we want to be | |
26 | * able to scatter it around anywhere in the kernel. | |
27 | */ | |
28 | void check_for_bios_corruption(void); | |
29 | void start_periodic_check_for_corruption(void); | |
30 | #else | |
31 | static inline void check_for_bios_corruption(void) | |
32 | { | |
33 | } | |
34 | ||
35 | static inline void start_periodic_check_for_corruption(void) | |
36 | { | |
37 | } | |
38 | #endif | |
39 | ||
1965aae3 | 40 | #endif /* _ASM_X86_BIOS_EBDA_H */ |