arch/alpha/include/asm/mmzone.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
   4  * Adapted for the alpha wildfire architecture Jan 2001.
   5  */
   6 #ifndef _ASM_MMZONE_H_
   7 #define _ASM_MMZONE_H_
   8
   9 #ifdef CONFIG_DISCONTIGMEM
  10
  11 #include <asm/smp.h>
  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 /*
  51  * Following are macros that each numa implementation must define.
  52  */
  53
  54 /*
  55  * Given a kernel address, find the home node of the underlying memory.
  56  */
  57 #define kvaddr_to_nid(kaddr)    pa_to_nid(__pa(kaddr))
  58
  59 /*
  60  * Given a kaddr, LOCAL_BASE_ADDR finds the owning node of the memory
  61  * and returns the kaddr corresponding to first physical page in the
  62  * node's mem_map.
  63  */
  64 #define LOCAL_BASE_ADDR(kaddr)                                            \
  65     ((unsigned long)__va(NODE_DATA(kvaddr_to_nid(kaddr))->node_start_pfn  \
  66                          << PAGE_SHIFT))
  67
  68 /* XXX: FIXME -- nyc */
  69 #define kern_addr_valid(kaddr)  (0)
  70
  71 #define mk_pte(page, pgprot)                                                 \
  72 ({                                                                           \
  73         pte_t pte;                                                           \
  74         unsigned long pfn;                                                   \
  75                                                                              \
  76         pfn = page_to_pfn(page) << 32; \
  77         pte_val(pte) = pfn | pgprot_val(pgprot);                             \
  78                                                                              \
  79         pte;                                                                 \
  80 })
  81
  82 #define pte_page(x)                                                     \
  83 ({                                                                      \
  84         unsigned long kvirt;                                            \
  85         struct page * __xx;                                             \
  86                                                                         \
  87         kvirt = (unsigned long)__va(pte_val(x) >> (32-PAGE_SHIFT));     \
  88         __xx = virt_to_page(kvirt);                                     \
  89                                                                         \
  90         __xx;                                                           \
  91 })
  92
  93 #define pfn_to_nid(pfn)         pa_to_nid(((u64)(pfn) << PAGE_SHIFT))
  94 #define pfn_valid(pfn)                                                  \
  95         (((pfn) - node_start_pfn(pfn_to_nid(pfn))) <                    \
  96          node_spanned_pages(pfn_to_nid(pfn)))                                   \
  97
  98 #endif /* CONFIG_DISCONTIGMEM */
  99
 100 #endif /* _ASM_MMZONE_H_ */