| /* | |
| * 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 |