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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - arch/s390/include/asm/pgalloc.h
3 * Copyright IBM Corp. 1999, 2000
4 * Author(s): Hartmut Penner (hp@de.ibm.com)
5 * Martin Schwidefsky (schwidefsky@de.ibm.com)
7 * Derived from "include/asm-i386/pgalloc.h"
8 * Copyright (C) 1994 Linus Torvalds
11 #ifndef _S390_PGALLOC_H
12 #define _S390_PGALLOC_H
14 #include <linux/threads.h>
15 #include <linux/gfp.h>
18 unsigned long *crst_table_alloc(struct mm_struct
*);
19 void crst_table_free(struct mm_struct
*, unsigned long *);
21 unsigned long *page_table_alloc(struct mm_struct
*);
22 void page_table_free(struct mm_struct
*, unsigned long *);
23 void page_table_free_rcu(struct mmu_gather
*, unsigned long *, unsigned long);
25 int set_guest_storage_key(struct mm_struct
*mm
, unsigned long addr
,
26 unsigned long key
, bool nq
);
27 unsigned long get_guest_storage_key(struct mm_struct
*mm
, unsigned long addr
);
29 static inline void clear_table(unsigned long *s
, unsigned long val
, size_t n
)
31 typedef struct { char _
[n
]; } addrtype
;
36 " mvc 8(248,%0),0(%0)\n"
37 "0: mvc 256(256,%0),0(%0)\n"
40 : "+a" (s
), "+d" (n
), "=m" (*(addrtype
*) s
)
41 : "m" (*(addrtype
*) s
));
44 static inline void crst_table_init(unsigned long *crst
, unsigned long entry
)
46 clear_table(crst
, entry
, sizeof(unsigned long)*2048);
49 static inline unsigned long pgd_entry_type(struct mm_struct
*mm
)
51 if (mm
->context
.asce_limit
<= (1UL << 31))
52 return _SEGMENT_ENTRY_EMPTY
;
53 if (mm
->context
.asce_limit
<= (1UL << 42))
54 return _REGION3_ENTRY_EMPTY
;
55 return _REGION2_ENTRY_EMPTY
;
58 int crst_table_upgrade(struct mm_struct
*, unsigned long limit
);
59 void crst_table_downgrade(struct mm_struct
*, unsigned long limit
);
61 static inline pud_t
*pud_alloc_one(struct mm_struct
*mm
, unsigned long address
)
63 unsigned long *table
= crst_table_alloc(mm
);
65 crst_table_init(table
, _REGION3_ENTRY_EMPTY
);
66 return (pud_t
*) table
;
68 #define pud_free(mm, pud) crst_table_free(mm, (unsigned long *) pud)
70 static inline pmd_t
*pmd_alloc_one(struct mm_struct
*mm
, unsigned long vmaddr
)
72 unsigned long *table
= crst_table_alloc(mm
);
76 crst_table_init(table
, _SEGMENT_ENTRY_EMPTY
);
77 if (!pgtable_pmd_page_ctor(virt_to_page(table
))) {
78 crst_table_free(mm
, table
);
81 return (pmd_t
*) table
;
84 static inline void pmd_free(struct mm_struct
*mm
, pmd_t
*pmd
)
86 pgtable_pmd_page_dtor(virt_to_page(pmd
));
87 crst_table_free(mm
, (unsigned long *) pmd
);
90 static inline void pgd_populate(struct mm_struct
*mm
, pgd_t
*pgd
, pud_t
*pud
)
92 pgd_val(*pgd
) = _REGION2_ENTRY
| __pa(pud
);
95 static inline void pud_populate(struct mm_struct
*mm
, pud_t
*pud
, pmd_t
*pmd
)
97 pud_val(*pud
) = _REGION3_ENTRY
| __pa(pmd
);
100 static inline pgd_t
*pgd_alloc(struct mm_struct
*mm
)
102 spin_lock_init(&mm
->context
.list_lock
);
103 INIT_LIST_HEAD(&mm
->context
.pgtable_list
);
104 INIT_LIST_HEAD(&mm
->context
.gmap_list
);
105 return (pgd_t
*) crst_table_alloc(mm
);
107 #define pgd_free(mm, pgd) crst_table_free(mm, (unsigned long *) pgd)
109 static inline void pmd_populate(struct mm_struct
*mm
,
110 pmd_t
*pmd
, pgtable_t pte
)
112 pmd_val(*pmd
) = _SEGMENT_ENTRY
+ __pa(pte
);
115 #define pmd_populate_kernel(mm, pmd, pte) pmd_populate(mm, pmd, pte)
117 #define pmd_pgtable(pmd) \
118 (pgtable_t)(pmd_val(pmd) & -sizeof(pte_t)*PTRS_PER_PTE)
121 * page table entry allocation/free routines.
123 #define pte_alloc_one_kernel(mm, vmaddr) ((pte_t *) page_table_alloc(mm))
124 #define pte_alloc_one(mm, vmaddr) ((pte_t *) page_table_alloc(mm))
126 #define pte_free_kernel(mm, pte) page_table_free(mm, (unsigned long *) pte)
127 #define pte_free(mm, pte) page_table_free(mm, (unsigned long *) pte)
129 extern void rcu_table_freelist_finish(void);
131 #endif /* _S390_PGALLOC_H */