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- /*
- * 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;
- }
- static inline int pfn_valid(unsigned long pfn)
- {
- int nid = pfn_to_nid(pfn);
- return (pfn <= node_end_pfn(nid));
- }
- #endif /* CONFIG_DISCONTIGMEM */
- #endif
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