| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com) |
| */ |
| |
| #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 |
