arch/m32r/include/asm/mmzone.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Written by Pat Gaughen (gone@us.ibm.com) Mar 2002
   4  *
   5  */
   6
   7 #ifndef _ASM_MMZONE_H_
   8 #define _ASM_MMZONE_H_
   9
  10 #include <asm/smp.h>
  11
  12 #ifdef CONFIG_DISCONTIGMEM
  13
  14 extern struct pglist_data *node_data[];
  15 #define NODE_DATA(nid)          (node_data[nid])
  16
  17 #define node_localnr(pfn, nid)  ((pfn) - NODE_DATA(nid)->node_start_pfn)
  18
  19 #define pmd_page(pmd)           (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
  20 /*
  21  * pfn_valid should be made as fast as possible, and the current definition
  22  * is valid for machines that are NUMA, but still contiguous, which is what
  23  * is currently supported. A more generalised, but slower definition would
  24  * be something like this - mbligh:
  25  * ( pfn_to_pgdat(pfn) && ((pfn) < node_end_pfn(pfn_to_nid(pfn))) )
  26  */
  27 #if 1   /* M32R_FIXME */
  28 #define pfn_valid(pfn)  (1)
  29 #else
  30 #define pfn_valid(pfn)  ((pfn) < num_physpages)
  31 #endif
  32
  33 /*
  34  * generic node memory support, the following assumptions apply:
  35  */
  36
  37 static __inline__ int pfn_to_nid(unsigned long pfn)
  38 {
  39         int node;
  40
  41         for (node = 0 ; node < MAX_NUMNODES ; node++)
  42                 if (pfn >= node_start_pfn(node) && pfn < node_end_pfn(node))
  43                         break;
  44
  45         return node;
  46 }
  47
  48 static __inline__ struct pglist_data *pfn_to_pgdat(unsigned long pfn)
  49 {
  50         return(NODE_DATA(pfn_to_nid(pfn)));
  51 }
  52
  53 #endif /* CONFIG_DISCONTIGMEM */
  54 #endif /* _ASM_MMZONE_H_ */