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Diffstat (limited to '')
| -rw-r--r-- | arch/arm64/include/asm/sparsemem.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/sparsemem.h b/arch/arm64/include/asm/sparsemem.h new file mode 100644 index 000000000..4b7346342 --- /dev/null +++ b/arch/arm64/include/asm/sparsemem.h @@ -0,0 +1,29 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2012 ARM Ltd. + */ +#ifndef __ASM_SPARSEMEM_H +#define __ASM_SPARSEMEM_H + +#define MAX_PHYSMEM_BITS CONFIG_ARM64_PA_BITS + +/* + * Section size must be at least 512MB for 64K base + * page size config. Otherwise it will be less than + * (MAX_ORDER - 1) and the build process will fail. + */ +#ifdef CONFIG_ARM64_64K_PAGES +#define SECTION_SIZE_BITS 29 + +#else + +/* + * Section size must be at least 128MB for 4K base + * page size config. Otherwise PMD based huge page + * entries could not be created for vmemmap mappings. + * 16K follows 4K for simplicity. + */ +#define SECTION_SIZE_BITS 27 +#endif /* CONFIG_ARM64_64K_PAGES */ + +#endif |