arch/tile/include/asm/mmzone.h

   1 /*
   2  * Copyright 2010 Tilera Corporation. All Rights Reserved.
   3  *
   4  *   This program is free software; you can redistribute it and/or
   5  *   modify it under the terms of the GNU General Public License
   6  *   as published by the Free Software Foundation, version 2.
   7  *
   8  *   This program is distributed in the hope that it will be useful, but
   9  *   WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  11  *   NON INFRINGEMENT.  See the GNU General Public License for
  12  *   more details.
  13  */
  14
  15 #ifndef _ASM_TILE_MMZONE_H
  16 #define _ASM_TILE_MMZONE_H
  17
  18 extern struct pglist_data node_data[];
  19 #define NODE_DATA(nid)  (&node_data[nid])
  20
  21 extern void get_memcfg_numa(void);
  22
  23 #ifdef CONFIG_DISCONTIGMEM
  24
  25 #include <asm/page.h>
  26
  27 /*
  28  * Generally, memory ranges are always doled out by the hypervisor in
  29  * fixed-size, power-of-two increments.  That would make computing the node
  30  * very easy.  We could just take a couple high bits of the PA, which
  31  * denote the memory shim, and we'd be done.  However, when we're doing
  32  * memory striping, this may not be true; PAs with different high bit
  33  * values might be in the same node.  Thus, we keep a lookup table to
  34  * translate the high bits of the PFN to the node number.
  35  */
  36 extern int highbits_to_node[];
  37
  38 static inline int pfn_to_nid(unsigned long pfn)
  39 {
  40         return highbits_to_node[__pfn_to_highbits(pfn)];
  41 }
  42
  43 #define kern_addr_valid(kaddr)  virt_addr_valid((void *)kaddr)
  44
  45 static inline int pfn_valid(unsigned long pfn)
  46 {
  47         int nid = pfn_to_nid(pfn);
  48
  49         if (nid >= 0)
  50                 return (pfn < node_end_pfn(nid));
  51         return 0;
  52 }
  53
  54 /* Information on the NUMA nodes that we compute early */
  55 extern unsigned long node_start_pfn[];
  56 extern unsigned long node_end_pfn[];
  57 extern unsigned long node_memmap_pfn[];
  58 extern unsigned long node_percpu_pfn[];
  59 extern unsigned long node_free_pfn[];
  60 #ifdef CONFIG_HIGHMEM
  61 extern unsigned long node_lowmem_end_pfn[];
  62 #endif
  63 #ifdef CONFIG_PCI
  64 extern unsigned long pci_reserve_start_pfn;
  65 extern unsigned long pci_reserve_end_pfn;
  66 #endif
  67
  68 #endif /* CONFIG_DISCONTIGMEM */
  69
  70 #endif /* _ASM_TILE_MMZONE_H */