+int numa_fake __initdata = 0;
+
+/* Numa emulation */
+static int numa_emulation(unsigned long start_pfn, unsigned long end_pfn)
+{
+ int i;
+ struct node nodes[MAXNODE];
+ unsigned long sz = ((end_pfn - start_pfn)<<PAGE_SHIFT) / numa_fake;
+
+ /* Kludge needed for the hash function */
+ if (hweight64(sz) > 1) {
+ unsigned long x = 1;
+ while ((x << 1) < sz)
+ x <<= 1;
+ if (x < sz/2)
+ printk("Numa emulation unbalanced. Complain to maintainer\n");
+ sz = x;
+ }
+
+ memset(&nodes,0,sizeof(nodes));
+ for (i = 0; i < numa_fake; i++) {
+ nodes[i].start = (start_pfn<<PAGE_SHIFT) + i*sz;
+ if (i == numa_fake-1)
+ sz = (end_pfn<<PAGE_SHIFT) - nodes[i].start;
+ nodes[i].end = nodes[i].start + sz;
+ if (i != numa_fake-1)
+ nodes[i].end--;
+ printk(KERN_INFO "Faking node %d at %016Lx-%016Lx (%LuMB)\n",
+ i,
+ nodes[i].start, nodes[i].end,
+ (nodes[i].end - nodes[i].start) >> 20);
+ }
+ numnodes = numa_fake;
+ memnode_shift = compute_hash_shift(nodes);
+ if (memnode_shift < 0) {
+ memnode_shift = 0;
+ printk(KERN_ERR "No NUMA hash function found. Emulation disabled.\n");
+ return -1;
+ }
+ for (i = 0; i < numa_fake; i++)
+ setup_node_bootmem(i, nodes[i].start, nodes[i].end);
+ numa_init_array();
+ return 0;
+}
+