arch/m32r/include/asm/mmzone.h

   1 /*
   2  * Written by Pat Gaughen (gone@us.ibm.com) Mar 2002
   3  *
   4  */
   5
   6 #ifndef _ASM_MMZONE_H_
   7 #define _ASM_MMZONE_H_
   8
   9 #include <asm/smp.h>
  10
  11 #ifdef CONFIG_DISCONTIGMEM
  12
  13 extern struct pglist_data *node_data[];
  14 #define NODE_DATA(nid)          (node_data[nid])
  15
  16 #define node_localnr(pfn, nid)  ((pfn) - NODE_DATA(nid)->node_start_pfn)
  17 #define node_start_pfn(nid)     (NODE_DATA(nid)->node_start_pfn)
  18 #define node_end_pfn(nid)                                               \
  19 ({                                                                      \
  20         pg_data_t *__pgdat = NODE_DATA(nid);                            \
  21         __pgdat->node_start_pfn + __pgdat->node_spanned_pages - 1;      \
  22 })
  23
  24 #define pmd_page(pmd)           (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
  25 /*
  26  * pfn_valid should be made as fast as possible, and the current definition
  27  * is valid for machines that are NUMA, but still contiguous, which is what
  28  * is currently supported. A more generalised, but slower definition would
  29  * be something like this - mbligh:
  30  * ( pfn_to_pgdat(pfn) && ((pfn) < node_end_pfn(pfn_to_nid(pfn))) )
  31  */
  32 #if 1   /* M32R_FIXME */
  33 #define pfn_valid(pfn)  (1)
  34 #else
  35 #define pfn_valid(pfn)  ((pfn) < num_physpages)
  36 #endif
  37
  38 /*
  39  * generic node memory support, the following assumptions apply:
  40  */
  41
  42 static __inline__ int pfn_to_nid(unsigned long pfn)
  43 {
  44         int node;
  45
  46         for (node = 0 ; node < MAX_NUMNODES ; node++)
  47                 if (pfn >= node_start_pfn(node) && pfn <= node_end_pfn(node))
  48                         break;
  49
  50         return node;
  51 }
  52
  53 static __inline__ struct pglist_data *pfn_to_pgdat(unsigned long pfn)
  54 {
  55         return(NODE_DATA(pfn_to_nid(pfn)));
  56 }
  57
  58 #endif /* CONFIG_DISCONTIGMEM */
  59 #endif /* _ASM_MMZONE_H_ */