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Diffstat (limited to 'include/asm-s390/pgalloc.h')
| -rw-r--r-- | include/asm-s390/pgalloc.h | 174 |
1 files changed, 0 insertions, 174 deletions
diff --git a/include/asm-s390/pgalloc.h b/include/asm-s390/pgalloc.h deleted file mode 100644 index f5b2bf3..0000000 --- a/include/asm-s390/pgalloc.h +++ /dev/null @@ -1,174 +0,0 @@ -/* - * include/asm-s390/pgalloc.h - * - * S390 version - * Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation - * Author(s): Hartmut Penner (hp@de.ibm.com) - * Martin Schwidefsky (schwidefsky@de.ibm.com) - * - * Derived from "include/asm-i386/pgalloc.h" - * Copyright (C) 1994 Linus Torvalds - */ - -#ifndef _S390_PGALLOC_H -#define _S390_PGALLOC_H - -#include <linux/threads.h> -#include <linux/gfp.h> -#include <linux/mm.h> - -#define check_pgt_cache() do {} while (0) - -unsigned long *crst_table_alloc(struct mm_struct *, int); -void crst_table_free(struct mm_struct *, unsigned long *); - -unsigned long *page_table_alloc(struct mm_struct *); -void page_table_free(struct mm_struct *, unsigned long *); -void disable_noexec(struct mm_struct *, struct task_struct *); - -static inline void clear_table(unsigned long *s, unsigned long val, size_t n) -{ - *s = val; - n = (n / 256) - 1; - asm volatile( -#ifdef CONFIG_64BIT - " mvc 8(248,%0),0(%0)\n" -#else - " mvc 4(252,%0),0(%0)\n" -#endif - "0: mvc 256(256,%0),0(%0)\n" - " la %0,256(%0)\n" - " brct %1,0b\n" - : "+a" (s), "+d" (n)); -} - -static inline void crst_table_init(unsigned long *crst, unsigned long entry) -{ - clear_table(crst, entry, sizeof(unsigned long)*2048); - crst = get_shadow_table(crst); - if (crst) - clear_table(crst, entry, sizeof(unsigned long)*2048); -} - -#ifndef __s390x__ - -static inline unsigned long pgd_entry_type(struct mm_struct *mm) -{ - return _SEGMENT_ENTRY_EMPTY; -} - -#define pud_alloc_one(mm,address) ({ BUG(); ((pud_t *)2); }) -#define pud_free(mm, x) do { } while (0) - -#define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); }) -#define pmd_free(mm, x) do { } while (0) - -#define pgd_populate(mm, pgd, pud) BUG() -#define pgd_populate_kernel(mm, pgd, pud) BUG() - -#define pud_populate(mm, pud, pmd) BUG() -#define pud_populate_kernel(mm, pud, pmd) BUG() - -#else /* __s390x__ */ - -static inline unsigned long pgd_entry_type(struct mm_struct *mm) -{ - if (mm->context.asce_limit <= (1UL << 31)) - return _SEGMENT_ENTRY_EMPTY; - if (mm->context.asce_limit <= (1UL << 42)) - return _REGION3_ENTRY_EMPTY; - return _REGION2_ENTRY_EMPTY; -} - -int crst_table_upgrade(struct mm_struct *, unsigned long limit); -void crst_table_downgrade(struct mm_struct *, unsigned long limit); - -static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address) -{ - unsigned long *table = crst_table_alloc(mm, mm->context.noexec); - if (table) - crst_table_init(table, _REGION3_ENTRY_EMPTY); - return (pud_t *) table; -} -#define pud_free(mm, pud) crst_table_free(mm, (unsigned long *) pud) - -static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long vmaddr) -{ - unsigned long *table = crst_table_alloc(mm, mm->context.noexec); - if (table) - crst_table_init(table, _SEGMENT_ENTRY_EMPTY); - return (pmd_t *) table; -} -#define pmd_free(mm, pmd) crst_table_free(mm, (unsigned long *) pmd) - -static inline void pgd_populate_kernel(struct mm_struct *mm, - pgd_t *pgd, pud_t *pud) -{ - pgd_val(*pgd) = _REGION2_ENTRY | __pa(pud); -} - -static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud) -{ - pgd_populate_kernel(mm, pgd, pud); - if (mm->context.noexec) { - pgd = get_shadow_table(pgd); - pud = get_shadow_table(pud); - pgd_populate_kernel(mm, pgd, pud); - } -} - -static inline void pud_populate_kernel(struct mm_struct *mm, - pud_t *pud, pmd_t *pmd) -{ - pud_val(*pud) = _REGION3_ENTRY | __pa(pmd); -} - -static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd) -{ - pud_populate_kernel(mm, pud, pmd); - if (mm->context.noexec) { - pud = get_shadow_table(pud); - pmd = get_shadow_table(pmd); - pud_populate_kernel(mm, pud, pmd); - } -} - -#endif /* __s390x__ */ - -static inline pgd_t *pgd_alloc(struct mm_struct *mm) -{ - INIT_LIST_HEAD(&mm->context.crst_list); - INIT_LIST_HEAD(&mm->context.pgtable_list); - return (pgd_t *) crst_table_alloc(mm, s390_noexec); -} -#define pgd_free(mm, pgd) crst_table_free(mm, (unsigned long *) pgd) - -static inline void pmd_populate_kernel(struct mm_struct *mm, - pmd_t *pmd, pte_t *pte) -{ - pmd_val(*pmd) = _SEGMENT_ENTRY + __pa(pte); -} - -static inline void pmd_populate(struct mm_struct *mm, - pmd_t *pmd, pgtable_t pte) -{ - pmd_populate_kernel(mm, pmd, pte); - if (mm->context.noexec) { - pmd = get_shadow_table(pmd); - pmd_populate_kernel(mm, pmd, pte + PTRS_PER_PTE); - } -} - -#define pmd_pgtable(pmd) \ - (pgtable_t)(pmd_val(pmd) & -sizeof(pte_t)*PTRS_PER_PTE) - -/* - * page table entry allocation/free routines. - */ -#define pte_alloc_one_kernel(mm, vmaddr) ((pte_t *) page_table_alloc(mm)) -#define pte_alloc_one(mm, vmaddr) ((pte_t *) page_table_alloc(mm)) - -#define pte_free_kernel(mm, pte) page_table_free(mm, (unsigned long *) pte) -#define pte_free(mm, pte) page_table_free(mm, (unsigned long *) pte) - -#endif /* _S390_PGALLOC_H */ |