1 /* 2 * arch/sh/mm/hugetlbpage.c 3 * 4 * SuperH HugeTLB page support. 5 * 6 * Cloned from sparc64 by Paul Mundt. 7 * 8 * Copyright (C) 2002, 2003 David S. Miller (davem@redhat.com) 9 */ 10 11 #include <linux/init.h> 12 #include <linux/fs.h> 13 #include <linux/mm.h> 14 #include <linux/hugetlb.h> 15 #include <linux/pagemap.h> 16 #include <linux/sysctl.h> 17 18 #include <asm/mman.h> 19 #include <asm/pgalloc.h> 20 #include <asm/tlb.h> 21 #include <asm/tlbflush.h> 22 #include <asm/cacheflush.h> 23 24 pte_t *huge_pte_alloc(struct mm_struct *mm, 25 unsigned long addr, unsigned long sz) 26 { 27 pgd_t *pgd; 28 pud_t *pud; 29 pmd_t *pmd; 30 pte_t *pte = NULL; 31 32 pgd = pgd_offset(mm, addr); 33 if (pgd) { 34 pud = pud_alloc(mm, pgd, addr); 35 if (pud) { 36 pmd = pmd_alloc(mm, pud, addr); 37 if (pmd) 38 pte = pte_alloc_map(mm, pmd, addr); 39 } 40 } 41 42 return pte; 43 } 44 45 pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr) 46 { 47 pgd_t *pgd; 48 pud_t *pud; 49 pmd_t *pmd; 50 pte_t *pte = NULL; 51 52 pgd = pgd_offset(mm, addr); 53 if (pgd) { 54 pud = pud_offset(pgd, addr); 55 if (pud) { 56 pmd = pmd_offset(pud, addr); 57 if (pmd) 58 pte = pte_offset_map(pmd, addr); 59 } 60 } 61 62 return pte; 63 } 64 65 int pmd_huge(pmd_t pmd) 66 { 67 return 0; 68 } 69 70 int pud_huge(pud_t pud) 71 { 72 return 0; 73 } 74