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32 lines
736 B
32 lines
736 B
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copyright (C) 2012 ARM Ltd. |
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*/ |
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#ifndef __ASM_SPARSEMEM_H |
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#define __ASM_SPARSEMEM_H |
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#ifdef CONFIG_SPARSEMEM |
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#define MAX_PHYSMEM_BITS CONFIG_ARM64_PA_BITS |
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/* |
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* Section size must be at least 512MB for 64K base |
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* page size config. Otherwise it will be less than |
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* (MAX_ORDER - 1) and the build process will fail. |
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*/ |
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#ifdef CONFIG_ARM64_64K_PAGES |
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#define SECTION_SIZE_BITS 29 |
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#else |
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/* |
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* Section size must be at least 128MB for 4K base |
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* page size config. Otherwise PMD based huge page |
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* entries could not be created for vmemmap mappings. |
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* 16K follows 4K for simplicity. |
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*/ |
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#define SECTION_SIZE_BITS 27 |
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#endif /* CONFIG_ARM64_64K_PAGES */ |
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#endif /* CONFIG_SPARSEMEM*/ |
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#endif
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