#ifndef _PARISC_MMZONE_H
#define _PARISC_MMZONE_H

#define MAX_PHYSMEM_RANGES 8 /* Fix the size for now (current known max is 3) */

#ifdef CONFIG_DISCONTIGMEM

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)

/* 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 signed 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;

if (unlikely(pfn_is_io(pfn)))
return 0;

i = pfn >> PFNNID_SHIFT;
BUG_ON(i >= ARRAY_SIZE(pfnnid_map));

return pfnnid_map[i];
}

static inline int pfn_valid(int pfn)
{
int nid = pfn_to_nid(pfn);

if (nid >= 0)
return (pfn < node_end_pfn(nid));
return 0;
}

#endif
#endif /* _PARISC_MMZONE_H */