sh: establish PMB mappings for NUMA nodes.

In the case of NUMA emulation when in range PPNs are being used for
secondary nodes, we need to make sure that the PMB has a mapping for it
before setting up the pgdat. This prevents the MMU from resetting.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

2 files changed, 4 insertions, 2 deletions

diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index 3459e70eed72..8870d6ba64bf 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -443,7 +443,7 @@ void __init setup_arch(char **cmdline_p)
 
         nodes_clear(node_online_map);
 
-        /* Setup bootmem with available RAM */
+        pmb_init();
         lmb_init();
         setup_memory();
         sparse_init();
@@ -452,7 +452,6 @@ void __init setup_arch(char **cmdline_p)
         conswitchp = &dummy_con;
 #endif
         paging_init();
-        pmb_init();
 
         ioremap_fixed_init();
 
diff --git a/arch/sh/mm/numa.c b/arch/sh/mm/numa.c
index 422e92721878..961b34085e3b 100644
--- a/arch/sh/mm/numa.c
+++ b/arch/sh/mm/numa.c
@@ -74,6 +74,9 @@ void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end)
         start_pfn = start >> PAGE_SHIFT;
         end_pfn = end >> PAGE_SHIFT;
 
+        pmb_bolt_mapping((unsigned long)__va(start), start, end - start,
+                         PAGE_KERNEL);
+
         lmb_add(start, end - start);
 
         __add_active_range(nid, start_pfn, end_pfn);