mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
80 lines
2 KiB
C
80 lines
2 KiB
C
/*
|
|
* Written by Pat Gaughen (gone@us.ibm.com) Mar 2002
|
|
*
|
|
*/
|
|
|
|
#ifndef _ASM_MMZONE_H_
|
|
#define _ASM_MMZONE_H_
|
|
|
|
#include <asm/smp.h>
|
|
|
|
#ifdef CONFIG_DISCONTIGMEM
|
|
|
|
extern struct pglist_data *node_data[];
|
|
#define NODE_DATA(nid) (node_data[nid])
|
|
|
|
#define node_localnr(pfn, nid) ((pfn) - NODE_DATA(nid)->node_start_pfn)
|
|
#define node_mem_map(nid) (NODE_DATA(nid)->node_mem_map)
|
|
#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 - 1; \
|
|
})
|
|
|
|
#define local_mapnr(kvaddr) \
|
|
({ \
|
|
unsigned long __pfn = __pa(kvaddr) >> PAGE_SHIFT; \
|
|
(__pfn - node_start_pfn(pfn_to_nid(__pfn))); \
|
|
})
|
|
|
|
#define pfn_to_page(pfn) \
|
|
({ \
|
|
unsigned long __pfn = pfn; \
|
|
int __node = pfn_to_nid(__pfn); \
|
|
&node_mem_map(__node)[node_localnr(__pfn,__node)]; \
|
|
})
|
|
|
|
#define page_to_pfn(pg) \
|
|
({ \
|
|
struct page *__page = pg; \
|
|
struct zone *__zone = page_zone(__page); \
|
|
(unsigned long)(__page - __zone->zone_mem_map) \
|
|
+ __zone->zone_start_pfn; \
|
|
})
|
|
#define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
|
|
/*
|
|
* pfn_valid should be made as fast as possible, and the current definition
|
|
* is valid for machines that are NUMA, but still contiguous, which is what
|
|
* is currently supported. A more generalised, but slower definition would
|
|
* be something like this - mbligh:
|
|
* ( pfn_to_pgdat(pfn) && ((pfn) < node_end_pfn(pfn_to_nid(pfn))) )
|
|
*/
|
|
#if 1 /* M32R_FIXME */
|
|
#define pfn_valid(pfn) (1)
|
|
#else
|
|
#define pfn_valid(pfn) ((pfn) < num_physpages)
|
|
#endif
|
|
|
|
/*
|
|
* generic node memory support, the following assumptions apply:
|
|
*/
|
|
|
|
static __inline__ int pfn_to_nid(unsigned long pfn)
|
|
{
|
|
int node;
|
|
|
|
for (node = 0 ; node < MAX_NUMNODES ; node++)
|
|
if (pfn >= node_start_pfn(node) && pfn <= node_end_pfn(node))
|
|
break;
|
|
|
|
return node;
|
|
}
|
|
|
|
static __inline__ struct pglist_data *pfn_to_pgdat(unsigned long pfn)
|
|
{
|
|
return(NODE_DATA(pfn_to_nid(pfn)));
|
|
}
|
|
|
|
#endif /* CONFIG_DISCONTIGMEM */
|
|
#endif /* _ASM_MMZONE_H_ */
|