1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _PARISC_MMZONE_H 3 #define _PARISC_MMZONE_H 4 5 #define MAX_PHYSMEM_RANGES 8 /* Fix the size for now (current known max is 3) */ 6 7 #ifdef CONFIG_DISCONTIGMEM 8 9 extern int npmem_ranges; 10 11 struct node_map_data { 12 pg_data_t pg_data; 13 }; 14 15 extern struct node_map_data node_data[]; 16 17 #define NODE_DATA(nid) (&node_data[nid].pg_data) 18 19 /* We have these possible memory map layouts: 20 * Astro: 0-3.75, 67.75-68, 4-64 21 * zx1: 0-1, 257-260, 4-256 22 * Stretch (N-class): 0-2, 4-32, 34-xxx 23 */ 24 25 /* Since each 1GB can only belong to one region (node), we can create 26 * an index table for pfn to nid lookup; each entry in pfnnid_map 27 * represents 1GB, and contains the node that the memory belongs to. */ 28 29 #define PFNNID_SHIFT (30 - PAGE_SHIFT) 30 #define PFNNID_MAP_MAX 512 /* support 512GB */ 31 extern signed char pfnnid_map[PFNNID_MAP_MAX]; 32 33 #ifndef CONFIG_64BIT 34 #define pfn_is_io(pfn) ((pfn & (0xf0000000UL >> PAGE_SHIFT)) == (0xf0000000UL >> PAGE_SHIFT)) 35 #else 36 /* io can be 0xf0f0f0f0f0xxxxxx or 0xfffffffff0000000 */ 37 #define pfn_is_io(pfn) ((pfn & (0xf000000000000000UL >> PAGE_SHIFT)) == (0xf000000000000000UL >> PAGE_SHIFT)) 38 #endif 39 pfn_to_nid(unsigned long pfn)40static inline int pfn_to_nid(unsigned long pfn) 41 { 42 unsigned int i; 43 44 if (unlikely(pfn_is_io(pfn))) 45 return 0; 46 47 i = pfn >> PFNNID_SHIFT; 48 BUG_ON(i >= ARRAY_SIZE(pfnnid_map)); 49 50 return pfnnid_map[i]; 51 } 52 pfn_valid(int pfn)53static inline int pfn_valid(int pfn) 54 { 55 int nid = pfn_to_nid(pfn); 56 57 if (nid >= 0) 58 return (pfn < node_end_pfn(nid)); 59 return 0; 60 } 61 62 #endif 63 #endif /* _PARISC_MMZONE_H */ 64
