1 files changed, 98 insertions, 0 deletions
diff --git a/arch/x86/lib/bios.h b/arch/x86/lib/bios.h
new file mode 100644
index 0000000000..8491b4acdd
--- /dev/null
+++ b/arch/x86/lib/bios.h
@@ -0,0 +1,98 @@
+/*
+ * From Coreboot file device/oprom/realmode/x86.h
+ *
+ * Copyright (C) 2007 Advanced Micro Devices, Inc.
+ * Copyright (C) 2009-2010 coresystems GmbH
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+
+#ifndef _X86_LIB_BIOS_H
+#define _X86_LIB_BIOS_H
+
+#define REALMODE_BASE		0x600
+
+#ifdef __ASSEMBLY__
+
+#define PTR_TO_REAL_MODE(x)	(x - asm_realmode_code + REALMODE_BASE)
+
+#else
+
+/* Convert a symbol address to our real mode area */
+#define PTR_TO_REAL_MODE(sym)\
+	(void *)(REALMODE_BASE + ((char *)&(sym) - (char *)&asm_realmode_code))
+
+/*
+ * The following symbols cannot be used directly. They need to be fixed up
+ * to point to the correct address location after the code has been copied
+ * to REALMODE_BASE. Absolute symbols are not used because those symbols are
+ * relocated by U-Boot.
+ */
+extern unsigned char asm_realmode_call, __realmode_interrupt;
+extern unsigned char asm_realmode_buffer;
+
+#define DOWNTO8(A) \
+	union { \
+		struct { \
+			union { \
+				struct { \
+					uint8_t A##l; \
+					uint8_t A##h; \
+				} __packed; \
+				uint16_t A##x; \
+			} __packed; \
+			uint16_t h##A##x; \
+		} __packed; \
+		uint32_t e##A##x; \
+	} __packed;
+
+#define DOWNTO16(A) \
+	union { \
+		struct { \
+			uint16_t A; \
+			uint16_t h##A; \
+		} __packed; \
+		uint32_t e##A; \
+	} __packed;
+
+struct eregs {
+	DOWNTO8(a);
+	DOWNTO8(c);
+	DOWNTO8(d);
+	DOWNTO8(b);
+	DOWNTO16(sp);
+	DOWNTO16(bp);
+	DOWNTO16(si);
+	DOWNTO16(di);
+	uint32_t vector;
+	uint32_t error_code;
+	uint32_t eip;
+	uint32_t cs;
+	uint32_t eflags;
+};
+
+struct realmode_idt {
+	u16 offset, cs;
+};
+
+void x86_exception(struct eregs *info);
+
+/* From x86_asm.S */
+extern unsigned char __idt_handler;
+extern unsigned int __idt_handler_size;
+extern unsigned char asm_realmode_code;
+extern unsigned int asm_realmode_code_size;
+
+asmlinkage void (*realmode_call)(u32 addr, u32 eax, u32 ebx, u32 ecx, u32 edx,
+				 u32 esi, u32 edi);
+
+asmlinkage void (*realmode_interrupt)(u32 intno, u32 eax, u32 ebx, u32 ecx,
+				      u32 edx, u32 esi, u32 edi);
+
+int int10_handler(void);
+int int12_handler(void);
+int int16_handler(void);
+int int1a_handler(void);
+#endif /*__ASSEMBLY__ */
+
+#endif