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/* 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
#ifdef CONFIG_NUMA
#define VIRTUAL_BUG_ON(x)
#include <asm/smp.h>
/* Simple perfect hash to map physical addresses to node numbers */
struct memnode {
int shift;
unsigned int mapsize;
u8 *map;
u8 embedded_map[64-16];
} ____cacheline_aligned; /* total size = 64 bytes */
extern struct memnode memnode;
#define memnode_shift memnode.shift
#define memnodemap memnode.map
#define memnodemapsize memnode.mapsize
extern struct pglist_data *node_data[];
static inline __attribute__((pure)) int phys_to_nid(unsigned long addr)
{
unsigned nid;
VIRTUAL_BUG_ON(!memnodemap);
VIRTUAL_BUG_ON((addr >> memnode_shift) >= memnodemapsize);
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)
extern int early_pfn_to_nid(unsigned long pfn);
#ifdef CONFIG_NUMA_EMU
#define FAKE_NODE_MIN_SIZE (64*1024*1024)
#define FAKE_NODE_MIN_HASH_MASK (~(FAKE_NODE_MIN_SIZE - 1uL))
#endif
#endif
#endif
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