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 18extern struct pglist_data node_data[]; 19#define NODE_DATA(nid) (&node_data[nid]) 20 21extern 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 */ 36extern int highbits_to_node[]; 37 38static 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 56static 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 */ 66extern unsigned long node_start_pfn[]; 67extern unsigned long node_end_pfn[]; 68extern unsigned long node_memmap_pfn[]; 69extern unsigned long node_percpu_pfn[]; 70extern unsigned long node_free_pfn[]; 71#ifdef CONFIG_HIGHMEM 72extern unsigned long node_lowmem_end_pfn[]; 73#endif 74#ifdef CONFIG_PCI 75extern unsigned long pci_reserve_start_pfn; 76extern unsigned long pci_reserve_end_pfn; 77#endif 78 79#endif /* CONFIG_DISCONTIGMEM */ 80 81#endif /* _ASM_TILE_MMZONE_H */ 82