100 lines
2.1 KiB
C
100 lines
2.1 KiB
C
|
/*
|
||
|
|
* Written by Pat Gaughen (gone@us.ibm.com) Mar 2002
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _ASM_X86_MMZONE_32_H
|
||
|
|
#define _ASM_X86_MMZONE_32_H
|
||
|
|
|
||
|
|
#include <asm/smp.h>
|
||
|
|
|
||
|
|
#ifdef CONFIG_NUMA
|
||
|
|
extern struct pglist_data *node_data[];
|
||
|
|
#define NODE_DATA(nid) (node_data[nid])
|
||
|
|
|
||
|
|
#include <asm/numaq.h>
|
||
|
|
/* summit or generic arch */
|
||
|
|
#include <asm/srat.h>
|
||
|
|
|
||
|
|
extern int get_memcfg_numa_flat(void);
|
||
|
|
/*
|
||
|
|
* This allows any one NUMA architecture to be compiled
|
||
|
|
* for, and still fall back to the flat function if it
|
||
|
|
* fails.
|
||
|
|
*/
|
||
|
|
static inline void get_memcfg_numa(void)
|
||
|
|
{
|
||
|
|
|
||
|
|
if (get_memcfg_numaq())
|
||
|
|
return;
|
||
|
|
if (get_memcfg_from_srat())
|
||
|
|
return;
|
||
|
|
get_memcfg_numa_flat();
|
||
|
|
}
|
||
|
|
|
||
|
|
extern void resume_map_numa_kva(pgd_t *pgd);
|
||
|
|
|
||
|
|
#else /* !CONFIG_NUMA */
|
||
|
|
|
||
|
|
#define get_memcfg_numa get_memcfg_numa_flat
|
||
|
|
|
||
|
|
static inline void resume_map_numa_kva(pgd_t *pgd) {}
|
||
|
|
|
||
|
|
#endif /* CONFIG_NUMA */
|
||
|
|
|
||
|
|
#ifdef CONFIG_DISCONTIGMEM
|
||
|
|
|
||
|
|
/*
|
||
|
|
* generic node memory support, the following assumptions apply:
|
||
|
|
*
|
||
|
|
* 1) memory comes in 64Mb contigious chunks which are either present or not
|
||
|
|
* 2) we will not have more than 64Gb in total
|
||
|
|
*
|
||
|
|
* for now assume that 64Gb is max amount of RAM for whole system
|
||
|
|
* 64Gb / 4096bytes/page = 16777216 pages
|
||
|
|
*/
|
||
|
|
#define MAX_NR_PAGES 16777216
|
||
|
|
#define MAX_ELEMENTS 1024
|
||
|
|
#define PAGES_PER_ELEMENT (MAX_NR_PAGES/MAX_ELEMENTS)
|
||
|
|
|
||
|
|
extern s8 physnode_map[];
|
||
|
|
|
||
|
|
static inline int pfn_to_nid(unsigned long pfn)
|
||
|
|
{
|
||
|
|
#ifdef CONFIG_NUMA
|
||
|
|
return((int) physnode_map[(pfn) / PAGES_PER_ELEMENT]);
|
||
|
|
#else
|
||
|
|
return 0;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Following are macros that each numa implmentation must define.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#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; \
|
||
|
|
})
|
||
|
|
|
||
|
|
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 /* CONFIG_DISCONTIGMEM */
|
||
|
|
|
||
|
|
#ifdef CONFIG_NEED_MULTIPLE_NODES
|
||
|
|
/* always use node 0 for bootmem on this numa platform */
|
||
|
|
#define bootmem_arch_preferred_node(__bdata, size, align, goal, limit) \
|
||
|
|
(NODE_DATA(0)->bdata)
|
||
|
|
#endif /* CONFIG_NEED_MULTIPLE_NODES */
|
||
|
|
|
||
|
|
#endif /* _ASM_X86_MMZONE_32_H */
|