LXR linux/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#include <asm/smp.h>
  10
  11/*
  12 * Following are macros that are specific to this numa platform.
  13 */
  14
  15extern pg_data_t node_data[];
  16
  17#define alpha_pa_to_nid(pa)             \
  18        (alpha_mv.pa_to_nid             \
  19         ? alpha_mv.pa_to_nid(pa)       \
  20         : (0))
  21#define node_mem_start(nid)             \
  22        (alpha_mv.node_mem_start        \
  23         ? alpha_mv.node_mem_start(nid) \
  24         : (0UL))
  25#define node_mem_size(nid)              \
  26        (alpha_mv.node_mem_size         \
  27         ? alpha_mv.node_mem_size(nid)  \
  28         : ((nid) ? (0UL) : (~0UL)))
  29
  30#define pa_to_nid(pa)           alpha_pa_to_nid(pa)
  31#define NODE_DATA(nid)          (&node_data[(nid)])
  32
  33#define node_localnr(pfn, nid)  ((pfn) - NODE_DATA(nid)->node_start_pfn)
  34
  35#if 1
  36#define PLAT_NODE_DATA_LOCALNR(p, n)    \
  37        (((p) >> PAGE_SHIFT) - PLAT_NODE_DATA(n)->gendata.node_start_pfn)
  38#else
  39static inline unsigned long
  40PLAT_NODE_DATA_LOCALNR(unsigned long p, int n)
  41{
  42        unsigned long temp;
  43        temp = p >> PAGE_SHIFT;
  44        return temp - PLAT_NODE_DATA(n)->gendata.node_start_pfn;
  45}
  46#endif
  47
  48#ifdef CONFIG_DISCONTIGMEM
  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 virt_to_page(kaddr)     pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
  72
  73#define pmd_page(pmd)           (pfn_to_page(pmd_val(pmd) >> 32))
  74#define pte_pfn(pte)            (pte_val(pte) >> 32)
  75
  76#define mk_pte(page, pgprot)                                                 \
  77({                                                                           \
  78        pte_t pte;                                                           \
  79        unsigned long pfn;                                                   \
  80                                                                             \
  81        pfn = page_to_pfn(page) << 32; \
  82        pte_val(pte) = pfn | pgprot_val(pgprot);                             \
  83                                                                             \
  84        pte;                                                                 \
  85})
  86
  87#define pte_page(x)                                                     \
  88({                                                                      \
  89        unsigned long kvirt;                                            \
  90        struct page * __xx;                                             \
  91                                                                        \
  92        kvirt = (unsigned long)__va(pte_val(x) >> (32-PAGE_SHIFT));     \
  93        __xx = virt_to_page(kvirt);                                     \
  94                                                                        \
  95        __xx;                                                           \
  96})
  97
  98#define page_to_pa(page)                                                \
  99        (page_to_pfn(page) << PAGE_SHIFT)
 100
 101#define pfn_to_nid(pfn)         pa_to_nid(((u64)(pfn) << PAGE_SHIFT))
 102#define pfn_valid(pfn)                                                  \
 103        (((pfn) - node_start_pfn(pfn_to_nid(pfn))) <                    \
 104         node_spanned_pages(pfn_to_nid(pfn)))                                   \
 105
 106#define virt_addr_valid(kaddr)  pfn_valid((__pa(kaddr) >> PAGE_SHIFT))
 107
 108#endif /* CONFIG_DISCONTIGMEM */
 109
 110#endif /* _ASM_MMZONE_H_ */
 111