include/asm-mips64/mmzone.h

   1 /*
   2  * Written by Kanoj Sarcar (kanoj@sgi.com) Aug 99
   3  */
   4 #ifndef _ASM_MMZONE_H_
   5 #define _ASM_MMZONE_H_
   6
   7 #include <linux/config.h>
   8 #include <asm/sn/types.h>
   9 #include <asm/sn/addrs.h>
  10 #include <asm/sn/arch.h>
  11 #include <asm/sn/klkernvars.h>
  12
  13 typedef struct plat_pglist_data {
  14         pg_data_t       gendata;
  15         kern_vars_t     kern_vars;
  16 } plat_pg_data_t;
  17
  18 /*
  19  * Following are macros that are specific to this numa platform.
  20  */
  21
  22 extern int numa_debug(void);
  23 extern plat_pg_data_t *plat_node_data[];
  24
  25 #define PHYSADDR_TO_NID(pa)             NASID_TO_COMPACT_NODEID(NASID_GET(pa))
  26 #define PLAT_NODE_DATA(n)               (plat_node_data[n])
  27 #define PLAT_NODE_DATA_STARTNR(n)    (PLAT_NODE_DATA(n)->gendata.node_start_mapnr)
  28 #define PLAT_NODE_DATA_SIZE(n)       (PLAT_NODE_DATA(n)->gendata.node_size)
  29 #define PLAT_NODE_DATA_LOCALNR(p, n) \
  30                 (((p) - PLAT_NODE_DATA(n)->gendata.node_start_paddr) >> PAGE_SHIFT)
  31
  32 #define numa_node_id()  cputocnode(current->processor)
  33
  34 #ifdef CONFIG_DISCONTIGMEM
  35
  36 /*
  37  * Following are macros that each numa implmentation must define.
  38  */
  39
  40 /*
  41  * Given a kernel address, find the home node of the underlying memory.
  42  */
  43 #define KVADDR_TO_NID(kaddr) \
  44         ((NASID_TO_COMPACT_NODEID(NASID_GET(__pa(kaddr))) != -1) ? \
  45         (NASID_TO_COMPACT_NODEID(NASID_GET(__pa(kaddr)))) : \
  46         (printk("NUMABUG: %s line %d addr 0x%lx", __FILE__, __LINE__, kaddr), \
  47         numa_debug(), -1))
  48
  49 /*
  50  * Return a pointer to the node data for node n.
  51  */
  52 #define NODE_DATA(n)    (&((PLAT_NODE_DATA(n))->gendata))
  53
  54 /*
  55  * NODE_MEM_MAP gives the kaddr for the mem_map of the node.
  56  */
  57 #define NODE_MEM_MAP(nid)       (NODE_DATA(nid)->node_mem_map)
  58
  59 /*
  60  * Given a kaddr, ADDR_TO_MAPBASE finds the owning node of the memory
  61  * and returns the the mem_map of that node.
  62  */
  63 #define ADDR_TO_MAPBASE(kaddr) \
  64                         NODE_MEM_MAP(KVADDR_TO_NID((unsigned long)(kaddr)))
  65
  66 /*
  67  * Given a kaddr, LOCAL_BASE_ADDR finds the owning node of the memory
  68  * and returns the kaddr corresponding to first physical page in the
  69  * node's mem_map.
  70  */
  71 #define LOCAL_BASE_ADDR(kaddr)  ((unsigned long)(kaddr) & ~(NODE_MAX_MEM_SIZE-1))
  72
  73 #define LOCAL_MAP_NR(kvaddr) \
  74         (((unsigned long)(kvaddr)-LOCAL_BASE_ADDR((kvaddr))) >> PAGE_SHIFT)
  75
  76 #define MIPS64_NR(kaddr) (((unsigned long)(kaddr) > (unsigned long)high_memory)\
  77                 ? (max_mapnr + 1) : (LOCAL_MAP_NR((kaddr)) + \
  78                 (((unsigned long)ADDR_TO_MAPBASE((kaddr)) - PAGE_OFFSET) / \
  79                 sizeof(mem_map_t))))
  80
  81 #define kern_addr_valid(addr)   ((KVADDR_TO_NID((unsigned long)addr) > \
  82         -1) ? 0 : (test_bit(LOCAL_MAP_NR((addr)), \
  83         NODE_DATA(KVADDR_TO_NID((unsigned long)addr))->valid_addr_bitmap)))
  84
  85 #define virt_to_page(kaddr)     (mem_map + MIPS64_NR(kaddr))
  86 #define VALID_PAGE(page)        ((page - mem_map) < max_mapnr)
  87
  88 #endif /* CONFIG_DISCONTIGMEM */
  89
  90 #endif /* _ASM_MMZONE_H_ */