/* * arch/sh/mm/hugetlbpage.c * * SuperH HugeTLB page support. * * Cloned from sparc64 by Paul Mundt. * * Copyright (C) 2002, 2003 David S. Miller (davem@redhat.com) */ #include <linux/init.h> #include <linux/fs.h> #include <linux/mm.h> #include <linux/hugetlb.h> #include <linux/pagemap.h> #include <linux/slab.h> #include <linux/sysctl.h> #include <asm/mman.h> #include <asm/pgalloc.h> #include <asm/tlb.h> #include <asm/tlbflush.h> #include <asm/cacheflush.h> pte_t *huge_pte_alloc(struct mm_struct *mm, unsigned long addr, unsigned long sz) { pgd_t *pgd; pud_t *pud; pmd_t *pmd; pte_t *pte = NULL; pgd = pgd_offset(mm, addr); if (pgd) { pud = pud_alloc(mm, pgd, addr); if (pud) { pmd = pmd_alloc(mm, pud, addr); if (pmd) pte = pte_alloc_map(mm, pmd, addr); } } return pte; } pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr) { pgd_t *pgd; pud_t *pud; pmd_t *pmd; pte_t *pte = NULL; pgd = pgd_offset(mm, addr); if (pgd) { pud = pud_offset(pgd, addr); if (pud) { pmd = pmd_offset(pud, addr); if (pmd) pte = pte_offset_map(pmd, addr); } } return pte; } int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep) { return 0; } struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address, int write) { return ERR_PTR(-EINVAL); } int pmd_huge(pmd_t pmd) { return 0; } int pud_huge(pud_t pud) { return 0; } struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, pmd_t *pmd, int write) { return NULL; }