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Diffstat (limited to 'arch/powerpc/kernel/prom.c')
-rw-r--r--arch/powerpc/kernel/prom.c47
1 files changed, 46 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 3a2dc7e6586a..6f73c739f1e2 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -1160,6 +1160,8 @@ static inline void __init phyp_dump_reserve_mem(void) {}
void __init early_init_devtree(void *params)
{
+ unsigned long limit;
+
DBG(" -> early_init_devtree(%p)\n", params);
/* Setup flat device-tree pointer */
@@ -1200,7 +1202,19 @@ void __init early_init_devtree(void *params)
early_reserve_mem();
phyp_dump_reserve_mem();
- lmb_enforce_memory_limit(memory_limit);
+ limit = memory_limit;
+ if (! limit) {
+ unsigned long memsize;
+
+ /* Ensure that total memory size is page-aligned, because
+ * otherwise mark_bootmem() gets upset. */
+ lmb_analyze();
+ memsize = lmb_phys_mem_size();
+ if ((memsize & PAGE_MASK) != memsize)
+ limit = memsize & PAGE_MASK;
+ }
+ lmb_enforce_memory_limit(limit);
+
lmb_analyze();
DBG("Phys. mem: %lx\n", lmb_phys_mem_size());
@@ -1271,6 +1285,37 @@ struct device_node *of_find_node_by_phandle(phandle handle)
EXPORT_SYMBOL(of_find_node_by_phandle);
/**
+ * of_find_next_cache_node - Find a node's subsidiary cache
+ * @np: node of type "cpu" or "cache"
+ *
+ * Returns a node pointer with refcount incremented, use
+ * of_node_put() on it when done. Caller should hold a reference
+ * to np.
+ */
+struct device_node *of_find_next_cache_node(struct device_node *np)
+{
+ struct device_node *child;
+ const phandle *handle;
+
+ handle = of_get_property(np, "l2-cache", NULL);
+ if (!handle)
+ handle = of_get_property(np, "next-level-cache", NULL);
+
+ if (handle)
+ return of_find_node_by_phandle(*handle);
+
+ /* OF on pmac has nodes instead of properties named "l2-cache"
+ * beneath CPU nodes.
+ */
+ if (!strcmp(np->type, "cpu"))
+ for_each_child_of_node(np, child)
+ if (!strcmp(child->type, "cache"))
+ return child;
+
+ return NULL;
+}
+
+/**
* of_find_all_nodes - Get next node in global list
* @prev: Previous node or NULL to start iteration
* of_node_put() will be called on it