74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
#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 __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 */
|