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
  18 #define pmd_page(pmd)           (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
  19 /*
  20  * pfn_valid should be made as fast as possible, and the current definition
  21  * is valid for machines that are NUMA, but still contiguous, which is what
  22  * is currently supported. A more generalised, but slower definition would
  23  * be something like this - mbligh:
  24  * ( pfn_to_pgdat(pfn) && ((pfn) < node_end_pfn(pfn_to_nid(pfn))) )
  25  */
  26 #if 1   /* M32R_FIXME */
  27 #define pfn_valid(pfn)  (1)
  28 #else
  29 #define pfn_valid(pfn)  ((pfn) < num_physpages)
  30 #endif
  31
  32 /*
  33  * generic node memory support, the following assumptions apply:
  34  */
  35
  36 static __inline__ int pfn_to_nid(unsigned long pfn)
  37 {
  38         int node;
  39
  40         for (node = 0 ; node < MAX_NUMNODES ; node++)
  41                 if (pfn >= node_start_pfn(node) && pfn < node_end_pfn(node))
  42                         break;
  43
  44         return node;
  45 }
  46
  47 static __inline__ struct pglist_data *pfn_to_pgdat(unsigned long pfn)
  48 {
  49         return(NODE_DATA(pfn_to_nid(pfn)));
  50 }
  51
  52 #endif /* CONFIG_DISCONTIGMEM */
  53 #endif /* _ASM_MMZONE_H_ */