include/asm-alpha/mmzone.h

   1 /*
   2  * Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
   3  * Adapted for the alpha wildfire architecture Jan 2001.
   4  */
   5 #ifndef _ASM_MMZONE_H_
   6 #define _ASM_MMZONE_H_
   7
   8 #include <linux/config.h>
   9 #include <asm/smp.h>
  10
  11 struct bootmem_data_t; /* stupid forward decl. */
  12
  13 /*
  14  * Following are macros that are specific to this numa platform.
  15  */
  16
  17 extern pg_data_t node_data[];
  18
  19 #define alpha_pa_to_nid(pa)             \
  20         (alpha_mv.pa_to_nid             \
  21          ? alpha_mv.pa_to_nid(pa)       \
  22          : (0))
  23 #define node_mem_start(nid)             \
  24         (alpha_mv.node_mem_start        \
  25          ? alpha_mv.node_mem_start(nid) \
  26          : (0UL))
  27 #define node_mem_size(nid)              \
  28         (alpha_mv.node_mem_size         \
  29          ? alpha_mv.node_mem_size(nid)  \
  30          : ((nid) ? (0UL) : (~0UL)))
  31
  32 #define pa_to_nid(pa)           alpha_pa_to_nid(pa)
  33 #define NODE_DATA(nid)          (&node_data[(nid)])
  34
  35 #define node_localnr(pfn, nid)  ((pfn) - NODE_DATA(nid)->node_start_pfn)
  36
  37 #if 1
  38 #define PLAT_NODE_DATA_LOCALNR(p, n)    \
  39         (((p) >> PAGE_SHIFT) - PLAT_NODE_DATA(n)->gendata.node_start_pfn)
  40 #else
  41 static inline unsigned long
  42 PLAT_NODE_DATA_LOCALNR(unsigned long p, int n)
  43 {
  44         unsigned long temp;
  45         temp = p >> PAGE_SHIFT;
  46         return temp - PLAT_NODE_DATA(n)->gendata.node_start_pfn;
  47 }
  48 #endif
  49
  50 #ifdef CONFIG_DISCONTIGMEM
  51
  52 /*
  53  * Following are macros that each numa implementation must define.
  54  */
  55
  56 /*
  57  * Given a kernel address, find the home node of the underlying memory.
  58  */
  59 #define kvaddr_to_nid(kaddr)    pa_to_nid(__pa(kaddr))
  60 #define node_start_pfn(nid)     (NODE_DATA(nid)->node_start_pfn)
  61
  62 #define local_mapnr(kvaddr) \
  63       ((__pa(kvaddr) >> PAGE_SHIFT) - node_start_pfn(kvaddr_to_nid(kvaddr)))
  64
  65 /*
  66  * Given a kaddr, LOCAL_BASE_ADDR finds the owning node of the memory
  67  * and returns the kaddr corresponding to first physical page in the
  68  * node's mem_map.
  69  */
  70 #define LOCAL_BASE_ADDR(kaddr)                                            \
  71     ((unsigned long)__va(NODE_DATA(kvaddr_to_nid(kaddr))->node_start_pfn  \
  72                          << PAGE_SHIFT))
  73
  74 /* XXX: FIXME -- wli */
  75 #define kern_addr_valid(kaddr)  (0)
  76
  77 #define virt_to_page(kaddr)     pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
  78
  79 #define VALID_PAGE(page)        (((page) - mem_map) < max_mapnr)
  80
  81 #define pmd_page(pmd)           (pfn_to_page(pmd_val(pmd) >> 32))
  82 #define pte_pfn(pte)            (pte_val(pte) >> 32)
  83
  84 #define mk_pte(page, pgprot)                                                 \
  85 ({                                                                           \
  86         pte_t pte;                                                           \
  87         unsigned long pfn;                                                   \
  88                                                                              \
  89         pfn = ((unsigned long)((page)-page_zone(page)->zone_mem_map)) << 32; \
  90         pfn += page_zone(page)->zone_start_pfn << 32;                        \
  91         pte_val(pte) = pfn | pgprot_val(pgprot);                             \
  92                                                                              \
  93         pte;                                                                 \
  94 })
  95
  96 #define pte_page(x)                                                     \
  97 ({                                                                      \
  98         unsigned long kvirt;                                            \
  99         struct page * __xx;                                             \
 100                                                                         \
 101         kvirt = (unsigned long)__va(pte_val(x) >> (32-PAGE_SHIFT));     \
 102         __xx = virt_to_page(kvirt);                                     \
 103                                                                         \
 104         __xx;                                                           \
 105 })
 106
 107 #define pfn_to_page(pfn)                                                \
 108 ({                                                                      \
 109         unsigned long kaddr = (unsigned long)__va((pfn) << PAGE_SHIFT); \
 110         (NODE_DATA(kvaddr_to_nid(kaddr))->node_mem_map + local_mapnr(kaddr));   \
 111 })
 112
 113 #define page_to_pfn(page)                                               \
 114         ((page) - page_zone(page)->zone_mem_map +                       \
 115          (page_zone(page)->zone_start_pfn))
 116
 117 #define page_to_pa(page)                                                \
 118         ((( (page) - page_zone(page)->zone_mem_map )                    \
 119         + page_zone(page)->zone_start_pfn) << PAGE_SHIFT)
 120
 121 #define pfn_to_nid(pfn)         pa_to_nid(((u64)(pfn) << PAGE_SHIFT))
 122 #define pfn_valid(pfn)                                                  \
 123         (((pfn) - node_start_pfn(pfn_to_nid(pfn))) <                    \
 124          node_spanned_pages(pfn_to_nid(pfn)))                                   \
 125
 126 #define virt_addr_valid(kaddr)  pfn_valid((__pa(kaddr) >> PAGE_SHIFT))
 127
 128 #endif /* CONFIG_DISCONTIGMEM */
 129
 130 #endif /* _ASM_MMZONE_H_ */