1 files changed, 21 insertions, 0 deletions

diff --git a/include/asm-ia64/agp.h b/include/asm-ia64/agp.h
new file mode 100644
index 000000000000..d1316f1e6ee1
--- /dev/null
+++ b/include/asm-ia64/agp.h
@@ -0,0 +1,21 @@
+#ifndef _ASM_IA64_AGP_H
+#define _ASM_IA64_AGP_H
+
+/*
+ * IA-64 specific AGP definitions.
+ *
+ * Copyright (C) 2002-2003 Hewlett-Packard Co
+ *      David Mosberger-Tang <davidm@hpl.hp.com>
+ */
+
+/*
+ * To avoid memory-attribute aliasing issues, we require that the AGPGART engine operate
+ * in coherent mode, which lets us map the AGP memory as normal (write-back) memory
+ * (unlike x86, where it gets mapped "write-coalescing").
+ */
+#define map_page_into_agp(page)         /* nothing */
+#define unmap_page_from_agp(page)       /* nothing */
+#define flush_agp_mappings()            /* nothing */
+#define flush_agp_cache()               mb()
+
+#endif /* _ASM_IA64_AGP_H */