X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-ia64%2Fagp.h;h=e0bf8a4ab1a05c8dcaa836c2c41aabe543a559eb;hb=refs%2Fheads%2Fvserver;hp=d1316f1e6ee18f464926ba1de462f4cb6f7a2e4d;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git

diff --git a/include/asm-ia64/agp.h b/include/asm-ia64/agp.h
index d1316f1e6..e0bf8a4ab 100644
--- a/include/asm-ia64/agp.h
+++ b/include/asm-ia64/agp.h
@@ -18,4 +18,45 @@
 #define flush_agp_mappings()		/* nothing */
 #define flush_agp_cache()		mb()
 
+/* Convert a physical address to an address suitable for the GART. */
+#ifndef CONFIG_XEN
+#define phys_to_gart(x) (x)
+#define gart_to_phys(x) (x)
+#else
+#define phys_to_gart(x) phys_to_machine_for_dma(x)
+#define gart_to_phys(x) machine_to_phys_for_dma(x)
+#endif
+
+/* GATT allocation. Returns/accepts GATT kernel virtual address. */
+#ifndef CONFIG_XEN
+#define alloc_gatt_pages(order)		\
+	((char *)__get_free_pages(GFP_KERNEL, (order)))
+#define free_gatt_pages(table, order)	\
+	free_pages((unsigned long)(table), (order))
+#else
+#include <asm/hypervisor.h>
+static inline char*
+alloc_gatt_pages(unsigned int order)
+{
+	unsigned long error;
+	unsigned long ret = __get_free_pages(GFP_KERNEL, (order));
+	if (ret == 0) {
+		goto out;
+	}
+	error = xen_create_contiguous_region(ret, order, 0);
+	if (error) {
+		free_pages(ret, order);
+		ret = 0;
+	}
+out:
+	return (char*)ret;
+}
+static inline void
+free_gatt_pages(void* table, unsigned int order)
+{
+	xen_destroy_contiguous_region((unsigned long)table, order);
+	free_pages((unsigned long)table, order);
+}
+#endif /* CONFIG_XEN */
+
 #endif /* _ASM_IA64_AGP_H */