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69 lines
1.5 KiB
69 lines
1.5 KiB
/* |
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* MIPS Huge TLB Page Support for Kernel. |
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* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file "COPYING" in the main directory of this archive |
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* for more details. |
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* |
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* Copyright (C) 2002, Rohit Seth <[email protected]> |
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* Copyright 2005, Embedded Alley Solutions, Inc. |
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* Matt Porter <[email protected]> |
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* Copyright (C) 2008, 2009 Cavium Networks, Inc. |
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*/ |
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#include <linux/fs.h> |
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#include <linux/mm.h> |
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#include <linux/hugetlb.h> |
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#include <linux/pagemap.h> |
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#include <linux/err.h> |
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#include <linux/sysctl.h> |
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#include <asm/mman.h> |
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#include <asm/tlb.h> |
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#include <asm/tlbflush.h> |
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pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr, |
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unsigned long sz) |
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{ |
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pgd_t *pgd; |
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p4d_t *p4d; |
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pud_t *pud; |
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pte_t *pte = NULL; |
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pgd = pgd_offset(mm, addr); |
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p4d = p4d_alloc(mm, pgd, addr); |
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pud = pud_alloc(mm, p4d, addr); |
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if (pud) |
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pte = (pte_t *)pmd_alloc(mm, pud, addr); |
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return pte; |
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} |
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pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr, |
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unsigned long sz) |
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{ |
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pgd_t *pgd; |
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p4d_t *p4d; |
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pud_t *pud; |
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pmd_t *pmd = NULL; |
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pgd = pgd_offset(mm, addr); |
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if (pgd_present(*pgd)) { |
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p4d = p4d_offset(pgd, addr); |
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if (p4d_present(*p4d)) { |
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pud = pud_offset(p4d, addr); |
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if (pud_present(*pud)) |
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pmd = pmd_offset(pud, addr); |
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} |
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} |
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return (pte_t *) pmd; |
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} |
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int pmd_huge(pmd_t pmd) |
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{ |
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return (pmd_val(pmd) & _PAGE_HUGE) != 0; |
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} |
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int pud_huge(pud_t pud) |
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{ |
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return (pud_val(pud) & _PAGE_HUGE) != 0; |
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}
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