kernel-ark/include/asm-sh/mmzone.h
Paul Mundt b241cb0c88 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>
2007-06-08 02:43:49 +00:00

47 lines
1.1 KiB
C

#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 */