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Diffstat (limited to 'include/asm-x86/mach-default/bios_ebda.h')
-rw-r--r--include/asm-x86/mach-default/bios_ebda.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/include/asm-x86/mach-default/bios_ebda.h b/include/asm-x86/mach-default/bios_ebda.h
new file mode 100644
index 0000000..9cbd9a6
--- /dev/null
+++ b/include/asm-x86/mach-default/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 */
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