sparc64: Add JBUS NUMA detection.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c
index b4aeb0f..75d82e2 100644
--- a/arch/sparc64/mm/init.c
+++ b/arch/sparc64/mm/init.c
@@ -938,6 +938,10 @@
int count, nid;
u64 grp;
+ /* This is the right thing to do on currently supported
+ * SUN4U NUMA platforms as well, as the PCI controller does
+ * not sit behind any particular memory controller.
+ */
if (!mlgroups)
return -1;
@@ -1206,8 +1210,44 @@
return err;
}
+static int __init numa_parse_jbus(void)
+{
+ unsigned long cpu, index;
+
+ /* NUMA node id is encoded in bits 36 and higher, and there is
+ * a 1-to-1 mapping from CPU ID to NUMA node ID.
+ */
+ index = 0;
+ for_each_present_cpu(cpu) {
+ numa_cpu_lookup_table[cpu] = index;
+ numa_cpumask_lookup_table[index] = cpumask_of_cpu(cpu);
+ node_masks[index].mask = ~((1UL << 36UL) - 1UL);
+ node_masks[index].val = cpu << 36UL;
+
+ index++;
+ }
+ num_node_masks = index;
+
+ add_node_ranges();
+
+ for (index = 0; index < num_node_masks; index++) {
+ allocate_node_data(index);
+ node_set_online(index);
+ }
+
+ return 0;
+}
+
static int __init numa_parse_sun4u(void)
{
+ if (tlb_type == cheetah || tlb_type == cheetah_plus) {
+ unsigned long ver;
+
+ __asm__ ("rdpr %%ver, %0" : "=r" (ver));
+ if ((ver >> 32UL) == __JALAPENO_ID ||
+ (ver >> 32UL) == __SERRANO_ID)
+ return numa_parse_jbus();
+ }
return -1;
}