1 files changed, 49 insertions, 0 deletions

diff --git a/arch/ia64/mm/numa.c b/arch/ia64/mm/numa.c
new file mode 100644
index 000000000000..77118bbf3d8b
--- /dev/null
+++ b/arch/ia64/mm/numa.c
@@ -0,0 +1,49 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * This file contains NUMA specific variables and functions which can
+ * be split away from DISCONTIGMEM and are used on NUMA machines with
+ * contiguous memory.
+ * 
+ *                         2002/08/07 Erich Focht <efocht@ess.nec.de>
+ */
+
+#include <linux/config.h>
+#include <linux/cpu.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/node.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <asm/mmzone.h>
+#include <asm/numa.h>
+
+
+/*
+ * The following structures are usually initialized by ACPI or
+ * similar mechanisms and describe the NUMA characteristics of the machine.
+ */
+int num_node_memblks;
+struct node_memblk_s node_memblk[NR_NODE_MEMBLKS];
+struct node_cpuid_s node_cpuid[NR_CPUS];
+/*
+ * This is a matrix with "distances" between nodes, they should be
+ * proportional to the memory access latency ratios.
+ */
+u8 numa_slit[MAX_NUMNODES * MAX_NUMNODES];
+
+/* Identify which cnode a physical address resides on */
+int
+paddr_to_nid(unsigned long paddr)
+{
+        int     i;
+
+        for (i = 0; i < num_node_memblks; i++)
+                if (paddr >= node_memblk[i].start_paddr &&
+                    paddr < node_memblk[i].start_paddr + node_memblk[i].size)
+                        break;
+
+        return (i < num_node_memblks) ? node_memblk[i].nid : (num_node_memblks ? -1 : 0);
+}