/* * 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_mem_map(nid) (NODE_DATA(nid)->node_mem_map) #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 local_mapnr(kvaddr) \ ({ \ unsigned long __pfn = __pa(kvaddr) >> PAGE_SHIFT; \ (__pfn - node_start_pfn(pfn_to_nid(__pfn))); \ }) #define pfn_to_page(pfn) \ ({ \ unsigned long __pfn = pfn; \ int __node = pfn_to_nid(__pfn); \ &node_mem_map(__node)[node_localnr(__pfn,__node)]; \ }) #define page_to_pfn(pg) \ ({ \ struct page *__page = pg; \ struct zone *__zone = page_zone(__page); \ (unsigned long)(__page - __zone->zone_mem_map) \ + __zone->zone_start_pfn; \ }) #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_ */