From b241cb0c885e55839fb0f93c6a4539c5416cc39f Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Wed, 6 Jun 2007 17:52:19 +0900 Subject: 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 --- include/asm-sh/mmzone.h | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 include/asm-sh/mmzone.h (limited to 'include/asm-sh/mmzone.h') 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 */ -- cgit v1.2.3