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9849a5697d
If an architecture uses 4level-fixup.h we don't need to do anything as it includes 5level-fixup.h. If an architecture uses pgtable-nop*d.h, define __ARCH_USE_5LEVEL_HACK before inclusion of the header. It makes asm-generic code to use 5level-fixup.h. If an architecture has 4-level paging or folds levels on its own, include 5level-fixup.h directly. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Michal Hocko <mhocko@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
25 lines
559 B
C
25 lines
559 B
C
#ifndef __ASM_SH_PGTABLE_2LEVEL_H
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#define __ASM_SH_PGTABLE_2LEVEL_H
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#define __ARCH_USE_5LEVEL_HACK
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#include <asm-generic/pgtable-nopmd.h>
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/*
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* traditional two-level paging structure
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*/
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#define PAGETABLE_LEVELS 2
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/* PTE bits */
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#define PTE_MAGNITUDE 2 /* 32-bit PTEs */
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#define PTE_SHIFT PAGE_SHIFT
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#define PTE_BITS (PTE_SHIFT - PTE_MAGNITUDE)
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/* PGD bits */
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#define PGDIR_SHIFT (PTE_SHIFT + PTE_BITS)
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#define PTRS_PER_PGD (PAGE_SIZE / (1 << PTE_MAGNITUDE))
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#define USER_PTRS_PER_PGD (TASK_SIZE/PGDIR_SIZE)
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#endif /* __ASM_SH_PGTABLE_2LEVEL_H */
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