X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-arm%2Farch-ixp4xx%2Fmemory.h;h=d348548b592b74ccc3034a0c508f9d797615d464;hb=9bf4aaab3e101692164d49b7ca357651eb691cb6;hp=3f6da112712e364d730da729468faf461f9f5d01;hpb=db216c3d5e4c040e557a50f8f5d35d5c415e8c1c;p=linux-2.6.git

diff --git a/include/asm-arm/arch-ixp4xx/memory.h b/include/asm-arm/arch-ixp4xx/memory.h
index 3f6da1127..d348548b5 100644
--- a/include/asm-arm/arch-ixp4xx/memory.h
+++ b/include/asm-arm/arch-ixp4xx/memory.h
@@ -7,11 +7,45 @@
 #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