Release 4.10 arch/arc/include/asm/mmzone.h

/*
 * Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef _ASM_ARC_MMZONE_H

#define _ASM_ARC_MMZONE_H

#ifdef CONFIG_DISCONTIGMEM

extern struct pglist_data node_data[];

#define NODE_DATA(nid) (&node_data[nid])



static inline int pfn_to_nid(unsigned long pfn)
{
	int is_end_low = 1;

	if (IS_ENABLED(CONFIG_ARC_HAS_PAE40))
		is_end_low = pfn <= virt_to_pfn(0xFFFFFFFFUL);

	/*
         * node 0: lowmem:             0x8000_0000   to 0xFFFF_FFFF
         * node 1: HIGHMEM w/o  PAE40: 0x0           to 0x7FFF_FFFF
         *         HIGHMEM with PAE40: 0x1_0000_0000 to ...
         */
	if (pfn >= ARCH_PFN_OFFSET && is_end_low)
		return 0;

	return 1;
}

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static inline int pfn_valid(unsigned long pfn)
{
	int nid = pfn_to_nid(pfn);

	return (pfn <= node_end_pfn(nid));
}
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#endif /* CONFIG_DISCONTIGMEM  */

#endif
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Directory: arch/arc/include/asm

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