/* * Copyright 2010 Tilera Corporation. All Rights Reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation, version 2. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or * NON INFRINGEMENT. See the GNU General Public License for * more details. */ #ifndef _ASM_TILE_MMZONE_H #define _ASM_TILE_MMZONE_H extern struct pglist_data node_data[]; #define NODE_DATA(nid) (&node_data[nid]) extern void get_memcfg_numa(void); #ifdef CONFIG_DISCONTIGMEM #include <asm/page.h> /* * Generally, memory ranges are always doled out by the hypervisor in * fixed-size, power-of-two increments. That would make computing the node * very easy. We could just take a couple high bits of the PA, which * denote the memory shim, and we'd be done. However, when we're doing * memory striping, this may not be true; PAs with different high bit * values might be in the same node. Thus, we keep a lookup table to * translate the high bits of the PFN to the node number. */ extern int highbits_to_node[]; static inline int pfn_to_nid(unsigned long pfn) { return highbits_to_node[__pfn_to_highbits(pfn)]; } /* * Following are macros that each numa implmentation must define. */ #define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn) #define node_end_pfn(nid) \ ({ \ pg_data_t *__pgdat = NODE_DATA(nid); \ __pgdat->node_start_pfn + __pgdat->node_spanned_pages; \ }) #define kern_addr_valid(kaddr) virt_addr_valid((void *)kaddr) static inline int pfn_valid(int pfn) { int nid = pfn_to_nid(pfn); if (nid >= 0) return (pfn < node_end_pfn(nid)); return 0; } /* Information on the NUMA nodes that we compute early */ extern unsigned long node_start_pfn[]; extern unsigned long node_end_pfn[]; extern unsigned long node_memmap_pfn[]; extern unsigned long node_percpu_pfn[]; extern unsigned long node_free_pfn[]; #ifdef CONFIG_HIGHMEM extern unsigned long node_lowmem_end_pfn[]; #endif #ifdef CONFIG_PCI extern unsigned long pci_reserve_start_pfn; extern unsigned long pci_reserve_end_pfn; #endif #endif /* CONFIG_DISCONTIGMEM */ #endif /* _ASM_TILE_MMZONE_H */