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40 lines
914 B
40 lines
914 B
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_X86_BIOS_EBDA_H |
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#define _ASM_X86_BIOS_EBDA_H |
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#include <asm/io.h> |
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/* |
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* Returns physical address of EBDA. Returns 0 if there is no EBDA. |
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*/ |
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static inline unsigned int get_bios_ebda(void) |
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{ |
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/* |
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* There is a real-mode segmented pointer pointing to the |
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* 4K EBDA area at 0x40E. |
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*/ |
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unsigned int address = *(unsigned short *)phys_to_virt(0x40E); |
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address <<= 4; |
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return address; /* 0 means none */ |
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} |
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void reserve_bios_regions(void); |
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#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION |
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/* |
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* This is obviously not a great place for this, but we want to be |
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* able to scatter it around anywhere in the kernel. |
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*/ |
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void check_for_bios_corruption(void); |
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void start_periodic_check_for_corruption(void); |
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#else |
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static inline void check_for_bios_corruption(void) |
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{ |
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} |
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static inline void start_periodic_check_for_corruption(void) |
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{ |
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} |
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#endif |
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#endif /* _ASM_X86_BIOS_EBDA_H */
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