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