| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * arch/sh/mm/hugetlbpage.c |
| 4 | * |
| 5 | * SuperH HugeTLB page support. |
| 6 | * |
| 7 | * Cloned from sparc64 by Paul Mundt. |
| 8 | * |
| 9 | * Copyright (C) 2002, 2003 David S. Miller (davem@redhat.com) |
| 10 | */ |
| 11 | |
| 12 | #include <linux/init.h> |
| 13 | #include <linux/fs.h> |
| 14 | #include <linux/mm.h> |
| 15 | #include <linux/hugetlb.h> |
| 16 | #include <linux/pagemap.h> |
| 17 | #include <linux/sysctl.h> |
| 18 | |
| 19 | #include <asm/mman.h> |
| 20 | #include <asm/pgalloc.h> |
| 21 | #include <asm/tlb.h> |
| 22 | #include <asm/tlbflush.h> |
| 23 | #include <asm/cacheflush.h> |
| 24 | |
| 25 | pte_t *huge_pte_alloc(struct mm_struct *mm, |
| 26 | unsigned long addr, unsigned long sz) |
| 27 | { |
| 28 | pgd_t *pgd; |
| 29 | pud_t *pud; |
| 30 | pmd_t *pmd; |
| 31 | pte_t *pte = NULL; |
| 32 | |
| 33 | pgd = pgd_offset(mm, addr); |
| 34 | if (pgd) { |
| 35 | pud = pud_alloc(mm, pgd, addr); |
| 36 | if (pud) { |
| 37 | pmd = pmd_alloc(mm, pud, addr); |
| 38 | if (pmd) |
| 39 | pte = pte_alloc_map(mm, pmd, addr); |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | return pte; |
| 44 | } |
| 45 | |
| 46 | pte_t *huge_pte_offset(struct mm_struct *mm, |
| 47 | unsigned long addr, unsigned long sz) |
| 48 | { |
| 49 | pgd_t *pgd; |
| 50 | pud_t *pud; |
| 51 | pmd_t *pmd; |
| 52 | pte_t *pte = NULL; |
| 53 | |
| 54 | pgd = pgd_offset(mm, addr); |
| 55 | if (pgd) { |
| 56 | pud = pud_offset(pgd, addr); |
| 57 | if (pud) { |
| 58 | pmd = pmd_offset(pud, addr); |
| 59 | if (pmd) |
| 60 | pte = pte_offset_map(pmd, addr); |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | return pte; |
| 65 | } |
| 66 | |
| 67 | int pmd_huge(pmd_t pmd) |
| 68 | { |
| 69 | return 0; |
| 70 | } |
| 71 | |
| 72 | int pud_huge(pud_t pud) |
| 73 | { |
| 74 | return 0; |
| 75 | } |