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40 lines
843 B
40 lines
843 B
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (C) 2016 Synopsys, Inc. (www.synopsys.com) |
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*/ |
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#ifndef _ASM_ARC_MMZONE_H |
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#define _ASM_ARC_MMZONE_H |
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#ifdef CONFIG_DISCONTIGMEM |
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extern struct pglist_data node_data[]; |
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#define NODE_DATA(nid) (&node_data[nid]) |
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static inline int pfn_to_nid(unsigned long pfn) |
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{ |
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int is_end_low = 1; |
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if (IS_ENABLED(CONFIG_ARC_HAS_PAE40)) |
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is_end_low = pfn <= virt_to_pfn(0xFFFFFFFFUL); |
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/* |
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* node 0: lowmem: 0x8000_0000 to 0xFFFF_FFFF |
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* node 1: HIGHMEM w/o PAE40: 0x0 to 0x7FFF_FFFF |
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* HIGHMEM with PAE40: 0x1_0000_0000 to ... |
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*/ |
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if (pfn >= ARCH_PFN_OFFSET && is_end_low) |
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return 0; |
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return 1; |
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} |
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static inline int pfn_valid(unsigned long pfn) |
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{ |
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int nid = pfn_to_nid(pfn); |
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return (pfn <= node_end_pfn(nid)); |
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} |
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#endif /* CONFIG_DISCONTIGMEM */ |
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#endif
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