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/*
* 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)];
}
#define kern_addr_valid(kaddr) virt_addr_valid((void *)kaddr)
static inline int pfn_valid(unsigned long 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 */