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| author |   Paul Mundt <lethal@linux-sh.org> | 2007-06-06 17:52:19 +0900 |
|---|---|---|
| committer |   Paul Mundt <lethal@hera.kernel.org> | 2007-06-08 02:43:49 +0000 |
| commit | b241cb0c885e55839fb0f93c6a4539c5416cc39f (patch) | |
| tree | dc12c8df833820d642b22d4a5f556602c3832dde /include/asm-sh/mmzone.h | |
| parent | sh: Use asm/sections.h for linker section symbols. (diff) | |
| download | linux-dev-b241cb0c885e55839fb0f93c6a4539c5416cc39f.tar.xz linux-dev-b241cb0c885e55839fb0f93c6a4539c5416cc39f.zip | |
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 '')
| -rw-r--r-- | include/asm-sh/mmzone.h | 46 |
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 000000000000..7969f381dff2 --- /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 */ |