Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Andi Kleen | a551643 | 2008-07-23 21:27:41 -0700 | [diff] [blame] | 24 | pte_t *huge_pte_alloc(struct mm_struct *mm, |
| 25 | unsigned long addr, unsigned long sz) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | { |
| 27 | pgd_t *pgd; |
Paul Mundt | 3f787fe | 2006-09-27 13:11:57 +0900 | [diff] [blame] | 28 | pud_t *pud; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | pmd_t *pmd; |
| 30 | pte_t *pte = NULL; |
| 31 | |
| 32 | pgd = pgd_offset(mm, addr); |
| 33 | if (pgd) { |
Paul Mundt | 3f787fe | 2006-09-27 13:11:57 +0900 | [diff] [blame] | 34 | pud = pud_alloc(mm, pgd, addr); |
| 35 | if (pud) { |
| 36 | pmd = pmd_alloc(mm, pud, addr); |
| 37 | if (pmd) |
Andrea Arcangeli | 8ac1f83 | 2011-01-13 15:46:43 -0800 | [diff] [blame] | 38 | pte = pte_alloc_map(mm, NULL, pmd, addr); |
Paul Mundt | 3f787fe | 2006-09-27 13:11:57 +0900 | [diff] [blame] | 39 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | } |
Paul Mundt | 3f787fe | 2006-09-27 13:11:57 +0900 | [diff] [blame] | 41 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | return pte; |
| 43 | } |
| 44 | |
David Gibson | 63551ae | 2005-06-21 17:14:44 -0700 | [diff] [blame] | 45 | pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | { |
| 47 | pgd_t *pgd; |
Paul Mundt | 3f787fe | 2006-09-27 13:11:57 +0900 | [diff] [blame] | 48 | pud_t *pud; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | pmd_t *pmd; |
| 50 | pte_t *pte = NULL; |
| 51 | |
| 52 | pgd = pgd_offset(mm, addr); |
| 53 | if (pgd) { |
Paul Mundt | 3f787fe | 2006-09-27 13:11:57 +0900 | [diff] [blame] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | } |
Paul Mundt | 3f787fe | 2006-09-27 13:11:57 +0900 | [diff] [blame] | 61 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | return pte; |
| 63 | } |
| 64 | |
Chen, Kenneth W | 39dde65 | 2006-12-06 20:32:03 -0800 | [diff] [blame] | 65 | int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep) |
| 66 | { |
| 67 | return 0; |
| 68 | } |
| 69 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | struct page *follow_huge_addr(struct mm_struct *mm, |
| 71 | unsigned long address, int write) |
| 72 | { |
| 73 | return ERR_PTR(-EINVAL); |
| 74 | } |
| 75 | |
| 76 | int pmd_huge(pmd_t pmd) |
| 77 | { |
| 78 | return 0; |
| 79 | } |
| 80 | |
Andi Kleen | ceb8687 | 2008-07-23 21:27:50 -0700 | [diff] [blame] | 81 | int pud_huge(pud_t pud) |
| 82 | { |
| 83 | return 0; |
| 84 | } |
| 85 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address, |
| 87 | pmd_t *pmd, int write) |
| 88 | { |
| 89 | return NULL; |
| 90 | } |