This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / asm-arm / arch-ixp4xx / dma.h

diff --git a/include/asm-arm/arch-ixp4xx/dma.h b/include/asm-arm/arch-ixp4xx/dma.h
new file mode 100644 (file)
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--- /dev/null
+++ b/include/asm-arm/arch-ixp4xx/dma.h
@@ -0,0 +1,52 @@
+/*
+ * include/asm-arm/arch-ixp4xx/dma.h
+ *
+ * Copyright (C) 2001-2004 MontaVista Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#ifndef __ASM_ARCH_DMA_H
+#define __ASM_ARCH_DMA_H
+
+#include <linux/config.h>
+#include <linux/device.h>
+#include <linux/pci.h>
+#include <asm/page.h>
+#include <asm/sizes.h>
+#include <asm/hardware.h>
+
+#define MAX_DMA_ADDRESS                (PAGE_OFFSET + SZ_64M)
+
+/* No DMA */
+#define MAX_DMA_CHANNELS       0
+
+/*
+ * 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)
+
+#endif /* _ASM_ARCH_DMA_H */