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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)
/*
* Given a kernel address, find the home node of the underlying memory.
*/
#define kvaddr_to_nid(kaddr) pfn_to_nid(__pa(kaddr) >> PAGE_SHIFT)
#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; \
})
#define node_localnr(pfn, nid) ((pfn) - node_start_pfn(nid))
#define pfn_to_page(pfn) \
({ \
unsigned long __pfn = (pfn); \
int __node = pfn_to_nid(__pfn); \
&NODE_DATA(__node)->node_mem_map[node_localnr(__pfn,__node)]; \
})
#define page_to_pfn(pg) \
({ \
struct page *__page = pg; \
struct zone *__zone = page_zone(__page); \
BUG_ON(__zone == NULL); \
(unsigned long)(__page - __zone->zone_mem_map) \
+ __zone->zone_start_pfn; \
})
/* 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 __LP64__
#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 */
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