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, 46 unsigned long addr, unsigned long sz) 47 { 48 pgd_t *pgd; 49 pud_t *pud; 50 pmd_t *pmd; 51 pte_t *pte = NULL; 52 53 pgd = pgd_offset(mm, addr); 54 if (pgd) { 55 pud = pud_offset(pgd, addr); 56 if (pud) { 57 pmd = pmd_offset(pud, addr); 58 if (pmd) 59 pte = pte_offset_map(pmd, addr); 60 } 61 } 62 63 return pte; 64 } 65 66 int pmd_huge(pmd_t pmd) 67 { 68 return 0; 69 } 70 71 int pud_huge(pud_t pud) 72 { 73 return 0; 74 } 75