1 #ifndef _PARISC_MMZONE_H 2 #define _PARISC_MMZONE_H 3 4 #define MAX_PHYSMEM_RANGES 8 /* Fix the size for now (current known max is 3) */ 5 6 #ifdef CONFIG_DISCONTIGMEM 7 8 extern int npmem_ranges; 9 10 struct node_map_data { 11 pg_data_t pg_data; 12 }; 13 14 extern struct node_map_data node_data[]; 15 16 #define NODE_DATA(nid) (&node_data[nid].pg_data) 17 18 /* We have these possible memory map layouts: 19 * Astro: 0-3.75, 67.75-68, 4-64 20 * zx1: 0-1, 257-260, 4-256 21 * Stretch (N-class): 0-2, 4-32, 34-xxx 22 */ 23 24 /* Since each 1GB can only belong to one region (node), we can create 25 * an index table for pfn to nid lookup; each entry in pfnnid_map 26 * represents 1GB, and contains the node that the memory belongs to. */ 27 28 #define PFNNID_SHIFT (30 - PAGE_SHIFT) 29 #define PFNNID_MAP_MAX 512 /* support 512GB */ 30 extern signed char pfnnid_map[PFNNID_MAP_MAX]; 31 32 #ifndef CONFIG_64BIT 33 #define pfn_is_io(pfn) ((pfn & (0xf0000000UL >> PAGE_SHIFT)) == (0xf0000000UL >> PAGE_SHIFT)) 34 #else 35 /* io can be 0xf0f0f0f0f0xxxxxx or 0xfffffffff0000000 */ 36 #define pfn_is_io(pfn) ((pfn & (0xf000000000000000UL >> PAGE_SHIFT)) == (0xf000000000000000UL >> PAGE_SHIFT)) 37 #endif 38 pfn_to_nid(unsigned long pfn)39 static inline int pfn_to_nid(unsigned long pfn) 40 { 41 unsigned int i; 42 43 if (unlikely(pfn_is_io(pfn))) 44 return 0; 45 46 i = pfn >> PFNNID_SHIFT; 47 BUG_ON(i >= ARRAY_SIZE(pfnnid_map)); 48 49 return pfnnid_map[i]; 50 } 51 pfn_valid(int pfn)52 static inline int pfn_valid(int pfn) 53 { 54 int nid = pfn_to_nid(pfn); 55 56 if (nid >= 0) 57 return (pfn < node_end_pfn(nid)); 58 return 0; 59 } 60 61 #endif 62 #endif /* _PARISC_MMZONE_H */ 63