1 files changed, 61 insertions, 0 deletions

diff --git a/include/asm-arm/arch-ixp4xx/memory.h b/include/asm-arm/arch-ixp4xx/memory.h
new file mode 100644
index 000000000000..d348548b592b
--- /dev/null
+++ b/include/asm-arm/arch-ixp4xx/memory.h
@@ -0,0 +1,61 @@
+/*
+ * linux/include/asm-arm/arch-ixp4xx/memory.h
+ *
+ * Copyright (c) 2001-2004 MontaVista Software, Inc.
+ */
+
+#ifndef __ASM_ARCH_MEMORY_H
+#define __ASM_ARCH_MEMORY_H
+
+#include <asm/sizes.h>
+
+/*
+ * Physical DRAM offset.
+ */
+#define PHYS_OFFSET     (0x00000000UL)
+
+#ifndef __ASSEMBLY__
+
+/*
+ * Only first 64MB of memory can be accessed via PCI.
+ * We use GFP_DMA to allocate safe buffers to do map/unmap.
+ * This is really ugly and we need a better way of specifying
+ * DMA-capable regions of memory.
+ */
+static inline void __arch_adjust_zones(int node, unsigned long *zone_size, 
+        unsigned long *zhole_size) 
+{
+        unsigned int sz = SZ_64M >> PAGE_SHIFT;
+
+        /*
+         * Only adjust if > 64M on current system
+         */
+        if (node || (zone_size[0] <= sz))
+                return;
+
+        zone_size[1] = zone_size[0] - sz;
+        zone_size[0] = sz;
+        zhole_size[1] = zhole_size[0];
+        zhole_size[0] = 0;
+}
+
+#define arch_adjust_zones(node, size, holes) \
+        __arch_adjust_zones(node, size, holes)
+
+#define ISA_DMA_THRESHOLD (SZ_64M - 1)
+
+#endif
+
+/*
+ * Virtual view <-> DMA view memory address translations
+ * virt_to_bus: Used to translate the virtual address to an
+ *              address suitable to be passed to set_dma_addr
+ * bus_to_virt: Used to convert an address for DMA operations
+ *              to an address that the kernel can use.
+ *
+ * These are dummies for now.
+ */
+#define __virt_to_bus(x)         __virt_to_phys(x)
+#define __bus_to_virt(x)         __phys_to_virt(x)
+
+#endif