include/asm-mips/mmzone.h

   1 /*
   2  * Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
   3  * Rewritten for Linux 2.6 by Christoph Hellwig (hch@lst.de) Jan 2004
   4  */
   5 #ifndef _ASM_MMZONE_H_
   6 #define _ASM_MMZONE_H_
   7
   8 #include <linux/config.h>
   9 #include <asm/page.h>
  10 #include <mmzone.h>
  11
  12 #ifdef CONFIG_DISCONTIGMEM
  13
  14 #define kvaddr_to_nid(kvaddr)   pa_to_nid(__pa(kvaddr))
  15 #define pfn_to_nid(pfn)         pa_to_nid((pfn) << PAGE_SHIFT)
  16
  17 #define pfn_valid(pfn)                                          \
  18 ({                                                              \
  19         unsigned long __pfn = (pfn);                            \
  20         int __n = pfn_to_nid(__pfn);                            \
  21         ((__n >= 0) ? (__pfn < NODE_DATA(__n)->node_start_pfn + \
  22                        NODE_DATA(__n)->node_spanned_pages) : 0);\
  23 })
  24
  25 #define pfn_to_page(pfn)                                        \
  26 ({                                                              \
  27         unsigned long __pfn = (pfn);                            \
  28         pg_data_t *__pg = NODE_DATA(pfn_to_nid(__pfn));         \
  29         __pg->node_mem_map + (__pfn - __pg->node_start_pfn);    \
  30 })
  31
  32 #define page_to_pfn(p)                                          \
  33 ({                                                              \
  34         struct page *__p = (p);                                 \
  35         struct zone *__z = page_zone(__p);                      \
  36         ((__p - __z->zone_mem_map) + __z->zone_start_pfn);      \
  37 })
  38
  39 /* XXX: FIXME -- wli */
  40 #define kern_addr_valid(addr)   (0)
  41
  42 #endif /* CONFIG_DISCONTIGMEM */
  43
  44 #endif /* _ASM_MMZONE_H_ */