100 lines
2.1 KiB
C
100 lines
2.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* From Coreboot file device/oprom/realmode/x86.h
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*
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* Copyright (C) 2007 Advanced Micro Devices, Inc.
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* Copyright (C) 2009-2010 coresystems GmbH
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*/
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#ifndef _X86_LIB_BIOS_H
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#define _X86_LIB_BIOS_H
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#include <linux/linkage.h>
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#define REALMODE_BASE 0x600
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#ifdef __ASSEMBLY__
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#define PTR_TO_REAL_MODE(x) (x - asm_realmode_code + REALMODE_BASE)
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#else
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/* Convert a symbol address to our real mode area */
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#define PTR_TO_REAL_MODE(sym)\
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(void *)(REALMODE_BASE + ((char *)&(sym) - (char *)&asm_realmode_code))
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/*
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* The following symbols cannot be used directly. They need to be fixed up
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* to point to the correct address location after the code has been copied
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* to REALMODE_BASE. Absolute symbols are not used because those symbols are
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* relocated by U-Boot.
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*/
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extern unsigned char asm_realmode_call, __realmode_interrupt;
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extern unsigned char asm_realmode_buffer;
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#define DOWNTO8(A) \
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union { \
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struct { \
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union { \
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struct { \
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uint8_t A##l; \
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uint8_t A##h; \
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} __packed; \
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uint16_t A##x; \
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} __packed; \
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uint16_t h##A##x; \
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} __packed; \
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uint32_t e##A##x; \
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} __packed;
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#define DOWNTO16(A) \
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union { \
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struct { \
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uint16_t A; \
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uint16_t h##A; \
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} __packed; \
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uint32_t e##A; \
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} __packed;
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struct eregs {
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DOWNTO8(a);
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DOWNTO8(c);
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DOWNTO8(d);
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DOWNTO8(b);
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DOWNTO16(sp);
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DOWNTO16(bp);
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DOWNTO16(si);
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DOWNTO16(di);
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uint32_t vector;
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uint32_t error_code;
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uint32_t eip;
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uint32_t cs;
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uint32_t eflags;
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};
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struct realmode_idt {
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u16 offset, cs;
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};
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void x86_exception(struct eregs *info);
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/* From x86_asm.S */
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extern unsigned char __idt_handler;
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extern unsigned int __idt_handler_size;
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extern unsigned char asm_realmode_code;
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extern unsigned int asm_realmode_code_size;
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asmlinkage void (*realmode_call)(u32 addr, u32 eax, u32 ebx, u32 ecx, u32 edx,
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u32 esi, u32 edi);
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asmlinkage void (*realmode_interrupt)(u32 intno, u32 eax, u32 ebx, u32 ecx,
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u32 edx, u32 esi, u32 edi);
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int int10_handler(void);
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int int12_handler(void);
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int int16_handler(void);
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int int1a_handler(void);
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#endif /*__ASSEMBLY__ */
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#endif
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