tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 2013-15 Synopsys, Inc. (www.synopsys.com)
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 */
8
9
10#ifndef _ASM_ARC_HUGEPAGE_H
11#define _ASM_ARC_HUGEPAGE_H
12
13#include <linux/types.h>
14#define __ARCH_USE_5LEVEL_HACK
15#include <asm-generic/pgtable-nopmd.h>
16
17static inline pte_t pmd_pte(pmd_t pmd)
18{
19 return __pte(pmd_val(pmd));
20}
21
22static inline pmd_t pte_pmd(pte_t pte)
23{
24 return __pmd(pte_val(pte));
25}
26
27#define pmd_wrprotect(pmd) pte_pmd(pte_wrprotect(pmd_pte(pmd)))
28#define pmd_mkwrite(pmd) pte_pmd(pte_mkwrite(pmd_pte(pmd)))
29#define pmd_mkdirty(pmd) pte_pmd(pte_mkdirty(pmd_pte(pmd)))
30#define pmd_mkold(pmd) pte_pmd(pte_mkold(pmd_pte(pmd)))
31#define pmd_mkyoung(pmd) pte_pmd(pte_mkyoung(pmd_pte(pmd)))
32#define pmd_mkhuge(pmd) pte_pmd(pte_mkhuge(pmd_pte(pmd)))
33#define pmd_mknotpresent(pmd) pte_pmd(pte_mknotpresent(pmd_pte(pmd)))
34#define pmd_mkclean(pmd) pte_pmd(pte_mkclean(pmd_pte(pmd)))
35
36#define pmd_write(pmd) pte_write(pmd_pte(pmd))
37#define pmd_young(pmd) pte_young(pmd_pte(pmd))
38#define pmd_pfn(pmd) pte_pfn(pmd_pte(pmd))
39#define pmd_dirty(pmd) pte_dirty(pmd_pte(pmd))
40
41#define mk_pmd(page, prot) pte_pmd(mk_pte(page, prot))
42
43#define pmd_trans_huge(pmd) (pmd_val(pmd) & _PAGE_HW_SZ)
44
45#define pfn_pmd(pfn, prot) (__pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)))
46
47static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
48{
49 /*
50 * open-coded pte_modify() with additional retaining of HW_SZ bit
51 * so that pmd_trans_huge() remains true for this PMD
52 */
53 return __pmd((pmd_val(pmd) & (_PAGE_CHG_MASK | _PAGE_HW_SZ)) | pgprot_val(newprot));
54}
55
56static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
57 pmd_t *pmdp, pmd_t pmd)
58{
59 *pmdp = pmd;
60}
61
62extern void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
63 pmd_t *pmd);
64
65/* Generic variants assume pgtable_t is struct page *, hence need for these */
66#define __HAVE_ARCH_PGTABLE_DEPOSIT
67extern void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
68 pgtable_t pgtable);
69
70#define __HAVE_ARCH_PGTABLE_WITHDRAW
71extern pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
72
73#define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE
74extern void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
75 unsigned long end);
76
77#endif