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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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06743521d0
This patch add documentation and missing accessors. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
#ifndef _ASM_POWERPC_PGTABLE_PPC64_64K_H
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#define _ASM_POWERPC_PGTABLE_PPC64_64K_H
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#include <asm-generic/pgtable-nopud.h>
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#define PTE_INDEX_SIZE 8
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#define PMD_INDEX_SIZE 10
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#define PUD_INDEX_SIZE 0
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#define PGD_INDEX_SIZE 12
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#ifndef __ASSEMBLY__
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#define PTE_TABLE_SIZE (sizeof(real_pte_t) << PTE_INDEX_SIZE)
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#define PMD_TABLE_SIZE (sizeof(pmd_t) << PMD_INDEX_SIZE)
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#define PGD_TABLE_SIZE (sizeof(pgd_t) << PGD_INDEX_SIZE)
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#endif /* __ASSEMBLY__ */
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#define PTRS_PER_PTE (1 << PTE_INDEX_SIZE)
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#define PTRS_PER_PMD (1 << PMD_INDEX_SIZE)
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#define PTRS_PER_PGD (1 << PGD_INDEX_SIZE)
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/* With 4k base page size, hugepage PTEs go at the PMD level */
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#define MIN_HUGEPTE_SHIFT PAGE_SHIFT
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/* PMD_SHIFT determines what a second-level page table entry can map */
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#define PMD_SHIFT (PAGE_SHIFT + PTE_INDEX_SIZE)
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#define PMD_SIZE (1UL << PMD_SHIFT)
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#define PMD_MASK (~(PMD_SIZE-1))
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/* PGDIR_SHIFT determines what a third-level page table entry can map */
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#define PGDIR_SHIFT (PMD_SHIFT + PMD_INDEX_SIZE)
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#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
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#define PGDIR_MASK (~(PGDIR_SIZE-1))
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/* Bits to mask out from a PMD to get to the PTE page */
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/* PMDs point to PTE table fragments which are 4K aligned. */
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#define PMD_MASKED_BITS 0xfff
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/* Bits to mask out from a PGD/PUD to get to the PMD page */
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#define PUD_MASKED_BITS 0x1ff
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#define pgd_pte(pgd) (pud_pte(((pud_t){ pgd })))
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#define pte_pgd(pte) ((pgd_t)pte_pud(pte))
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#endif /* _ASM_POWERPC_PGTABLE_PPC64_64K_H */
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