LXR linux/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
  13extern 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
  36static __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
  47static __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_ */
  54