LXR linux/include/asm-m32r/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#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
  42static __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
  53static __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_ */
  60