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authorPaul Mundt <lethal@linux-sh.org>2007-06-06 17:52:19 +0900
committerPaul Mundt <lethal@hera.kernel.org>2007-06-08 02:43:49 +0000
commitb241cb0c885e55839fb0f93c6a4539c5416cc39f (patch)
treedc12c8df833820d642b22d4a5f556602c3832dde /include/asm-sh/mmzone.h
parent07cbb41b5308b92f29649254ff755e48ea60e24c (diff)
sh: Support for multiple nodes.
This adds basic support for multiple nodes on SH machines. This is primarily useful for boards with many different memory blocks that are otherwise unused (SH7722/SH7785 URAM and so forth). Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'include/asm-sh/mmzone.h')
-rw-r--r--include/asm-sh/mmzone.h46
1 files changed, 46 insertions, 0 deletions
diff --git a/include/asm-sh/mmzone.h b/include/asm-sh/mmzone.h
new file mode 100644
index 00000000000..7969f381dff
--- /dev/null
+++ b/include/asm-sh/mmzone.h
@@ -0,0 +1,46 @@
+#ifndef __ASM_SH_MMZONE_H
+#define __ASM_SH_MMZONE_H
+
+#ifdef __KERNEL__
+
+#ifdef CONFIG_NEED_MULTIPLE_NODES
+extern struct pglist_data *node_data[];
+#define NODE_DATA(nid) (node_data[nid])
+
+#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
+#define node_end_pfn(nid) (NODE_DATA(nid)->node_start_pfn + \
+ NODE_DATA(nid)->node_spanned_pages)
+
+static inline int pfn_to_nid(unsigned long pfn)
+{
+ int nid;
+
+ for (nid = 0; nid < MAX_NUMNODES; nid++)
+ if (pfn >= node_start_pfn(nid) && pfn <= node_end_pfn(nid))
+ break;
+
+ return nid;
+}
+
+static inline struct pglist_data *pfn_to_pgdat(unsigned long pfn)
+{
+ return NODE_DATA(pfn_to_nid(pfn));
+}
+
+/* arch/sh/mm/numa.c */
+void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end);
+#else
+static inline void
+setup_bootmem_node(int nid, unsigned long start, unsigned long end)
+{
+}
+#endif /* CONFIG_NEED_MULTIPLE_NODES */
+
+/* Platform specific mem init */
+void __init plat_mem_setup(void);
+
+/* arch/sh/kernel/setup.c */
+void __init setup_bootmem_allocator(unsigned long start_pfn);
+
+#endif /* __KERNEL__ */
+#endif /* __ASM_SH_MMZONE_H */