1 files changed, 24 insertions, 0 deletions

diff --git a/include/asm-x86/dmi_64.h b/include/asm-x86/dmi_64.h
new file mode 100644
index 000000000000..d02e32e3c3f0
--- /dev/null
+++ b/include/asm-x86/dmi_64.h
@@ -0,0 +1,24 @@
+#ifndef _ASM_DMI_H
+#define _ASM_DMI_H 1
+
+#include <asm/io.h>
+
+#define DMI_MAX_DATA 2048
+
+extern int dmi_alloc_index;
+extern char dmi_alloc_data[DMI_MAX_DATA];
+
+/* This is so early that there is no good way to allocate dynamic memory.
+   Allocate data in an BSS array. */
+static inline void *dmi_alloc(unsigned len)
+{
+        int idx = dmi_alloc_index;
+        if ((dmi_alloc_index += len) > DMI_MAX_DATA)
+                return NULL;
+        return dmi_alloc_data + idx;
+}
+
+#define dmi_ioremap early_ioremap
+#define dmi_iounmap early_iounmap
+
+#endif