xref: /openbmc/linux/arch/arc/include/asm/hugepage.h (revision 0edbfea5)
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 #include <asm-generic/pgtable-nopmd.h>
15 
16 static inline pte_t pmd_pte(pmd_t pmd)
17 {
18 	return __pte(pmd_val(pmd));
19 }
20 
21 static inline pmd_t pte_pmd(pte_t pte)
22 {
23 	return __pmd(pte_val(pte));
24 }
25 
26 #define pmd_wrprotect(pmd)	pte_pmd(pte_wrprotect(pmd_pte(pmd)))
27 #define pmd_mkwrite(pmd)	pte_pmd(pte_mkwrite(pmd_pte(pmd)))
28 #define pmd_mkdirty(pmd)	pte_pmd(pte_mkdirty(pmd_pte(pmd)))
29 #define pmd_mkold(pmd)		pte_pmd(pte_mkold(pmd_pte(pmd)))
30 #define pmd_mkyoung(pmd)	pte_pmd(pte_mkyoung(pmd_pte(pmd)))
31 #define pmd_mkhuge(pmd)		pte_pmd(pte_mkhuge(pmd_pte(pmd)))
32 #define pmd_mknotpresent(pmd)	pte_pmd(pte_mknotpresent(pmd_pte(pmd)))
33 #define pmd_mkclean(pmd)	pte_pmd(pte_mkclean(pmd_pte(pmd)))
34 
35 #define pmd_write(pmd)		pte_write(pmd_pte(pmd))
36 #define pmd_young(pmd)		pte_young(pmd_pte(pmd))
37 #define pmd_pfn(pmd)		pte_pfn(pmd_pte(pmd))
38 #define pmd_dirty(pmd)		pte_dirty(pmd_pte(pmd))
39 
40 #define mk_pmd(page, prot)	pte_pmd(mk_pte(page, prot))
41 
42 #define pmd_trans_huge(pmd)	(pmd_val(pmd) & _PAGE_HW_SZ)
43 
44 #define pfn_pmd(pfn, prot)	(__pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot)))
45 
46 static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
47 {
48         /*
49          * open-coded pte_modify() with additional retaining of HW_SZ bit
50          * so that pmd_trans_huge() remains true for this PMD
51          */
52         return __pmd((pmd_val(pmd) & (_PAGE_CHG_MASK | _PAGE_HW_SZ)) | pgprot_val(newprot));
53 }
54 
55 static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
56 			      pmd_t *pmdp, pmd_t pmd)
57 {
58 	*pmdp = pmd;
59 }
60 
61 extern void update_mmu_cache_pmd(struct vm_area_struct *vma, unsigned long addr,
62 				 pmd_t *pmd);
63 
64 /* Generic variants assume pgtable_t is struct page *, hence need for these */
65 #define __HAVE_ARCH_PGTABLE_DEPOSIT
66 extern void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,
67 				       pgtable_t pgtable);
68 
69 #define __HAVE_ARCH_PGTABLE_WITHDRAW
70 extern pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp);
71 
72 #define __HAVE_ARCH_FLUSH_PMD_TLB_RANGE
73 extern void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
74 				unsigned long end);
75 
76 #endif
77