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diff -Nurd linux-2.6.24.orig//arch/arm/mach-oxnas/pci.c linux-2.6.24/arch/arm/mach-oxnas/pci.c
--- linux-2.6.24.orig//arch/arm/mach-oxnas/pci.c 2009-03-10 20:29:02.000000000 +0100
+++ linux-2.6.24/arch/arm/mach-oxnas/pci.c 2009-03-10 21:10:47.000000000 +0100
@@ -78,12 +78,14 @@
static unsigned long pci_trhfa_timeout = 0;
#endif // CONFIG_OXNAS_PCI_RESET
+// processor allows up to 8MB PCI address ranges maximum by design
+// we split this up to 4MB prefetchable and 4MB non-prefetchable
+
#define PCI_BUS_NONMEM_START 0x00000000
-#define PCI_BUS_NONMEM_SIZE 0x00080000
-
+#define PCI_BUS_NONMEM_SIZE 0x00400000
#define PCI_BUS_PREMEM_START PCI_BUS_NONMEM_START + PCI_BUS_NONMEM_SIZE
-#define PCI_BUS_PREMEM_SIZE 0x00080000
+#define PCI_BUS_PREMEM_SIZE 0x00400000
#define SYNOPSYS_PCI_MEMORY_BASE_ADDRESS PCI_BASE_ADDRESS_0
#define SYNOPSYS_PCI_DUAL_CYCLE_BASE_ADDRESS PCI_BASE_ADDRESS_2
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