Chris Metcalf | 867e359 | 2010-05-28 23:09:12 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2010 Tilera Corporation. All Rights Reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation, version 2. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
| 11 | * NON INFRINGEMENT. See the GNU General Public License for |
| 12 | * more details. |
| 13 | */ |
| 14 | |
| 15 | #ifndef _ASM_TILE_MMZONE_H |
| 16 | #define _ASM_TILE_MMZONE_H |
| 17 | |
| 18 | extern struct pglist_data node_data[]; |
| 19 | #define NODE_DATA(nid) (&node_data[nid]) |
| 20 | |
| 21 | extern void get_memcfg_numa(void); |
| 22 | |
| 23 | #ifdef CONFIG_DISCONTIGMEM |
| 24 | |
| 25 | #include <asm/page.h> |
| 26 | |
| 27 | /* |
| 28 | * Generally, memory ranges are always doled out by the hypervisor in |
| 29 | * fixed-size, power-of-two increments. That would make computing the node |
| 30 | * very easy. We could just take a couple high bits of the PA, which |
| 31 | * denote the memory shim, and we'd be done. However, when we're doing |
| 32 | * memory striping, this may not be true; PAs with different high bit |
| 33 | * values might be in the same node. Thus, we keep a lookup table to |
| 34 | * translate the high bits of the PFN to the node number. |
| 35 | */ |
| 36 | extern int highbits_to_node[]; |
| 37 | |
| 38 | static inline int pfn_to_nid(unsigned long pfn) |
| 39 | { |
| 40 | return highbits_to_node[__pfn_to_highbits(pfn)]; |
| 41 | } |
| 42 | |
| 43 | /* |
| 44 | * Following are macros that each numa implmentation must define. |
| 45 | */ |
| 46 | |
| 47 | #define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn) |
| 48 | #define node_end_pfn(nid) \ |
| 49 | ({ \ |
| 50 | pg_data_t *__pgdat = NODE_DATA(nid); \ |
| 51 | __pgdat->node_start_pfn + __pgdat->node_spanned_pages; \ |
| 52 | }) |
| 53 | |
| 54 | #define kern_addr_valid(kaddr) virt_addr_valid((void *)kaddr) |
| 55 | |
| 56 | static inline int pfn_valid(int pfn) |
| 57 | { |
| 58 | int nid = pfn_to_nid(pfn); |
| 59 | |
| 60 | if (nid >= 0) |
| 61 | return (pfn < node_end_pfn(nid)); |
| 62 | return 0; |
| 63 | } |
| 64 | |
| 65 | /* Information on the NUMA nodes that we compute early */ |
| 66 | extern unsigned long node_start_pfn[]; |
| 67 | extern unsigned long node_end_pfn[]; |
| 68 | extern unsigned long node_memmap_pfn[]; |
| 69 | extern unsigned long node_percpu_pfn[]; |
| 70 | extern unsigned long node_free_pfn[]; |
| 71 | #ifdef CONFIG_HIGHMEM |
| 72 | extern unsigned long node_lowmem_end_pfn[]; |
| 73 | #endif |
| 74 | #ifdef CONFIG_PCI |
| 75 | extern unsigned long pci_reserve_start_pfn; |
| 76 | extern unsigned long pci_reserve_end_pfn; |
| 77 | #endif |
| 78 | |
| 79 | #endif /* CONFIG_DISCONTIGMEM */ |
| 80 | |
| 81 | #endif /* _ASM_TILE_MMZONE_H */ |