mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
/* K8 NUMA support */
|
|
/* Copyright 2002,2003 by Andi Kleen, SuSE Labs */
|
|
/* 2.5 Version loosely based on the NUMAQ Code by Pat Gaughen. */
|
|
#ifndef _ASM_X86_64_MMZONE_H
|
|
#define _ASM_X86_64_MMZONE_H 1
|
|
|
|
#include <linux/config.h>
|
|
|
|
#ifdef CONFIG_NUMA
|
|
|
|
#define VIRTUAL_BUG_ON(x)
|
|
|
|
#include <asm/smp.h>
|
|
|
|
#define NODEMAPSIZE 0xfff
|
|
|
|
/* Simple perfect hash to map physical addresses to node numbers */
|
|
extern int memnode_shift;
|
|
extern u8 memnodemap[NODEMAPSIZE];
|
|
|
|
extern struct pglist_data *node_data[];
|
|
|
|
static inline __attribute__((pure)) int phys_to_nid(unsigned long addr)
|
|
{
|
|
unsigned nid;
|
|
VIRTUAL_BUG_ON((addr >> memnode_shift) >= NODEMAPSIZE);
|
|
nid = memnodemap[addr >> memnode_shift];
|
|
VIRTUAL_BUG_ON(nid >= MAX_NUMNODES || !node_data[nid]);
|
|
return nid;
|
|
}
|
|
|
|
#define NODE_DATA(nid) (node_data[nid])
|
|
|
|
#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
|
|
#define node_end_pfn(nid) (NODE_DATA(nid)->node_start_pfn + \
|
|
NODE_DATA(nid)->node_spanned_pages)
|
|
|
|
#ifdef CONFIG_DISCONTIGMEM
|
|
|
|
#define pfn_to_nid(pfn) phys_to_nid((unsigned long)(pfn) << PAGE_SHIFT)
|
|
#define kvaddr_to_nid(kaddr) phys_to_nid(__pa(kaddr))
|
|
|
|
/* Requires pfn_valid(pfn) to be true */
|
|
#define pfn_to_page(pfn) ({ \
|
|
int nid = phys_to_nid(((unsigned long)(pfn)) << PAGE_SHIFT); \
|
|
((pfn) - node_start_pfn(nid)) + NODE_DATA(nid)->node_mem_map; \
|
|
})
|
|
|
|
#define page_to_pfn(page) \
|
|
(long)(((page) - page_zone(page)->zone_mem_map) + page_zone(page)->zone_start_pfn)
|
|
|
|
#define pfn_valid(pfn) ((pfn) >= num_physpages ? 0 : \
|
|
({ u8 nid__ = pfn_to_nid(pfn); \
|
|
nid__ != 0xff && (pfn) >= node_start_pfn(nid__) && (pfn) < node_end_pfn(nid__); }))
|
|
#endif
|
|
|
|
#define local_mapnr(kvaddr) \
|
|
( (__pa(kvaddr) >> PAGE_SHIFT) - node_start_pfn(kvaddr_to_nid(kvaddr)) )
|
|
#endif
|
|
#endif
|