Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* K8 NUMA support */ |
| 2 | /* Copyright 2002,2003 by Andi Kleen, SuSE Labs */ |
| 3 | /* 2.5 Version loosely based on the NUMAQ Code by Pat Gaughen. */ |
| 4 | #ifndef _ASM_X86_64_MMZONE_H |
| 5 | #define _ASM_X86_64_MMZONE_H 1 |
| 6 | |
| 7 | #include <linux/config.h> |
| 8 | |
Matt Tolentino | 2b97690 | 2005-06-23 00:08:06 -0700 | [diff] [blame] | 9 | #ifdef CONFIG_NUMA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | |
| 11 | #define VIRTUAL_BUG_ON(x) |
| 12 | |
| 13 | #include <asm/smp.h> |
| 14 | |
Andi Kleen | 6fa679f | 2006-04-18 12:35:16 +0200 | [diff] [blame] | 15 | /* Should really switch to dynamic allocation at some point */ |
| 16 | #define NODEMAPSIZE 0x4fff |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | |
| 18 | /* Simple perfect hash to map physical addresses to node numbers */ |
Eric Dumazet | dcf36bf | 2006-03-25 16:31:46 +0100 | [diff] [blame] | 19 | struct memnode { |
| 20 | int shift; |
| 21 | u8 map[NODEMAPSIZE]; |
| 22 | } ____cacheline_aligned; |
| 23 | extern struct memnode memnode; |
| 24 | #define memnode_shift memnode.shift |
| 25 | #define memnodemap memnode.map |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
| 27 | extern struct pglist_data *node_data[]; |
| 28 | |
| 29 | static inline __attribute__((pure)) int phys_to_nid(unsigned long addr) |
| 30 | { |
Andi Kleen | e90f22e | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 31 | unsigned nid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | VIRTUAL_BUG_ON((addr >> memnode_shift) >= NODEMAPSIZE); |
| 33 | nid = memnodemap[addr >> memnode_shift]; |
Andi Kleen | e90f22e | 2005-11-05 17:25:54 +0100 | [diff] [blame] | 34 | VIRTUAL_BUG_ON(nid >= MAX_NUMNODES || !node_data[nid]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | return nid; |
| 36 | } |
| 37 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #define NODE_DATA(nid) (node_data[nid]) |
| 39 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn) |
| 41 | #define node_end_pfn(nid) (NODE_DATA(nid)->node_start_pfn + \ |
| 42 | NODE_DATA(nid)->node_spanned_pages) |
| 43 | |
Matt Tolentino | 2b97690 | 2005-06-23 00:08:06 -0700 | [diff] [blame] | 44 | #ifdef CONFIG_DISCONTIGMEM |
Matt Tolentino | 2b97690 | 2005-06-23 00:08:06 -0700 | [diff] [blame] | 45 | #define pfn_to_nid(pfn) phys_to_nid((unsigned long)(pfn) << PAGE_SHIFT) |
| 46 | #define kvaddr_to_nid(kaddr) phys_to_nid(__pa(kaddr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
Andi Kleen | cf05013 | 2006-01-11 22:46:27 +0100 | [diff] [blame] | 48 | extern int pfn_valid(unsigned long pfn); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | #endif |
Matt Tolentino | 2b97690 | 2005-06-23 00:08:06 -0700 | [diff] [blame] | 50 | |
Matt Tolentino | 2b97690 | 2005-06-23 00:08:06 -0700 | [diff] [blame] | 51 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | #endif |