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Diffstat (limited to 'arch/m32r/include/asm/mmzone.h')
| -rw-r--r-- | arch/m32r/include/asm/mmzone.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/m32r/include/asm/mmzone.h b/arch/m32r/include/asm/mmzone.h new file mode 100644 index 00000000000..9f3b5accda8 --- /dev/null +++ b/arch/m32r/include/asm/mmzone.h @@ -0,0 +1,59 @@ +/* + * Written by Pat Gaughen (gone@us.ibm.com) Mar 2002 + * + */ + +#ifndef _ASM_MMZONE_H_ +#define _ASM_MMZONE_H_ + +#include <asm/smp.h> + +#ifdef CONFIG_DISCONTIGMEM + +extern struct pglist_data *node_data[]; +#define NODE_DATA(nid) (node_data[nid]) + +#define node_localnr(pfn, nid) ((pfn) - NODE_DATA(nid)->node_start_pfn) +#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn) +#define node_end_pfn(nid) \ +({ \ + pg_data_t *__pgdat = NODE_DATA(nid); \ + __pgdat->node_start_pfn + __pgdat->node_spanned_pages - 1; \ +}) + +#define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT)) +/* + * pfn_valid should be made as fast as possible, and the current definition + * is valid for machines that are NUMA, but still contiguous, which is what + * is currently supported. A more generalised, but slower definition would + * be something like this - mbligh: + * ( pfn_to_pgdat(pfn) && ((pfn) < node_end_pfn(pfn_to_nid(pfn))) ) + */ +#if 1 /* M32R_FIXME */ +#define pfn_valid(pfn) (1) +#else +#define pfn_valid(pfn) ((pfn) < num_physpages) +#endif + +/* + * generic node memory support, the following assumptions apply: + */ + +static __inline__ int pfn_to_nid(unsigned long pfn) +{ + int node; + + for (node = 0 ; node < MAX_NUMNODES ; node++) + if (pfn >= node_start_pfn(node) && pfn <= node_end_pfn(node)) + break; + + return node; +} + +static __inline__ struct pglist_data *pfn_to_pgdat(unsigned long pfn) +{ + return(NODE_DATA(pfn_to_nid(pfn))); +} + +#endif /* CONFIG_DISCONTIGMEM */ +#endif /* _ASM_MMZONE_H_ */ |