x86: use get_bios_ebda in mpparse_64.c

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 15 insertions, 0 deletions

diff --git a/include/asm-x86/bios_ebda.h b/include/asm-x86/bios_ebda.h
new file mode 100644
index 000000000000..9cbd9a668af8
--- /dev/null
+++ b/include/asm-x86/bios_ebda.h
@@ -0,0 +1,15 @@
+#ifndef _MACH_BIOS_EBDA_H
+#define _MACH_BIOS_EBDA_H
+
+/*
+ * there is a real-mode segmented pointer pointing to the
+ * 4K EBDA area at 0x40E.
+ */
+static inline unsigned int get_bios_ebda(void)
+{
+        unsigned int address = *(unsigned short *)phys_to_virt(0x40E);
+        address <<= 4;
+        return address; /* 0 means none */
+}
+
+#endif /* _MACH_BIOS_EBDA_H */