1 #ifndef _PARISC_MMZONE_H 2 #define _PARISC_MMZONE_H 3 4 #ifdef CONFIG_DISCONTIGMEM 5 6 #define MAX_PHYSMEM_RANGES 8 /* Fix the size for now (current known max is 3) */ 7 extern int npmem_ranges; 8 9 struct node_map_data { 10 pg_data_t pg_data; 11 }; 12 13 extern struct node_map_data node_data[]; 14 15 #define NODE_DATA(nid) (&node_data[nid].pg_data) 16 17 /* We have these possible memory map layouts: 18 * Astro: 0-3.75, 67.75-68, 4-64 19 * zx1: 0-1, 257-260, 4-256 20 * Stretch (N-class): 0-2, 4-32, 34-xxx 21 */ 22 23 /* Since each 1GB can only belong to one region (node), we can create 24 * an index table for pfn to nid lookup; each entry in pfnnid_map 25 * represents 1GB, and contains the node that the memory belongs to. */ 26 27 #define PFNNID_SHIFT (30 - PAGE_SHIFT) 28 #define PFNNID_MAP_MAX 512 /* support 512GB */ 29 extern unsigned char pfnnid_map[PFNNID_MAP_MAX]; 30 31 #ifndef CONFIG_64BIT 32 #define pfn_is_io(pfn) ((pfn & (0xf0000000UL >> PAGE_SHIFT)) == (0xf0000000UL >> PAGE_SHIFT)) 33 #else 34 /* io can be 0xf0f0f0f0f0xxxxxx or 0xfffffffff0000000 */ 35 #define pfn_is_io(pfn) ((pfn & (0xf000000000000000UL >> PAGE_SHIFT)) == (0xf000000000000000UL >> PAGE_SHIFT)) 36 #endif 37 38 static inline int pfn_to_nid(unsigned long pfn) 39 { 40 unsigned int i; 41 unsigned char r; 42 43 if (unlikely(pfn_is_io(pfn))) 44 return 0; 45 46 i = pfn >> PFNNID_SHIFT; 47 BUG_ON(i >= sizeof(pfnnid_map) / sizeof(pfnnid_map[0])); 48 r = pfnnid_map[i]; 49 BUG_ON(r == 0xff); 50 51 return (int)r; 52 } 53 54 static inline int pfn_valid(int pfn) 55 { 56 int nid = pfn_to_nid(pfn); 57 58 if (nid >= 0) 59 return (pfn < node_end_pfn(nid)); 60 return 0; 61 } 62 63 #else /* !CONFIG_DISCONTIGMEM */ 64 #define MAX_PHYSMEM_RANGES 1 65 #endif 66 #endif /* _PARISC_MMZONE_H */ 67