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#ifndef _PARISC_MMZONE_H #define _PARISC_MMZONE_H #ifdef CONFIG_DISCONTIGMEM #define MAX_PHYSMEM_RANGES 8 /* Fix the size for now (current known max is 3) */ extern int npmem_ranges; struct node_map_data { pg_data_t pg_data; }; extern struct node_map_data node_data[]; #define NODE_DATA(nid) (&node_data[nid].pg_data) #define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn) #define node_end_pfn(nid) \ ({ \ pg_data_t *__pgdat = NODE_DATA(nid); \ __pgdat->node_start_pfn + __pgdat->node_spanned_pages; \ }) /* We have these possible memory map layouts: * Astro: 0-3.75, 67.75-68, 4-64 * zx1: 0-1, 257-260, 4-256 * Stretch (N-class): 0-2, 4-32, 34-xxx */ /* Since each 1GB can only belong to one region (node), we can create * an index table for pfn to nid lookup; each entry in pfnnid_map * represents 1GB, and contains the node that the memory belongs to. */ #define PFNNID_SHIFT (30 - PAGE_SHIFT) #define PFNNID_MAP_MAX 512 /* support 512GB */ extern unsigned char pfnnid_map[PFNNID_MAP_MAX]; #ifndef CONFIG_64BIT #define pfn_is_io(pfn) ((pfn & (0xf0000000UL >> PAGE_SHIFT)) == (0xf0000000UL >> PAGE_SHIFT)) #else /* io can be 0xf0f0f0f0f0xxxxxx or 0xfffffffff0000000 */ #define pfn_is_io(pfn) ((pfn & (0xf000000000000000UL >> PAGE_SHIFT)) == (0xf000000000000000UL >> PAGE_SHIFT)) #endif static inline int pfn_to_nid(unsigned long pfn) { unsigned int i; unsigned char r; if (unlikely(pfn_is_io(pfn))) return 0; i = pfn >> PFNNID_SHIFT; BUG_ON(i >= sizeof(pfnnid_map) / sizeof(pfnnid_map[0])); r = pfnnid_map[i]; BUG_ON(r == 0xff); return (int)r; } static inline int pfn_valid(int pfn) { int nid = pfn_to_nid(pfn); if (nid >= 0) return (pfn < node_end_pfn(nid)); return 0; } #else /* !CONFIG_DISCONTIGMEM */ #define MAX_PHYSMEM_RANGES 1 #endif #endif /* _PARISC_MMZONE_H */ |