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a53c8fab3f
Remove the file name from the comment at top of many files. In most cases the file name was wrong anyway, so it's rather pointless. Also unify the IBM copyright statement. We did have a lot of sightly different statements and wanted to change them one after another whenever a file gets touched. However that never happened. Instead people start to take the old/"wrong" statements to use as a template for new files. So unify all of them in one go. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
141 lines
3.8 KiB
C
141 lines
3.8 KiB
C
/*
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* S390 version
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* Copyright IBM Corp. 1999, 2000
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* Author(s): Hartmut Penner (hp@de.ibm.com)
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* Martin Schwidefsky (schwidefsky@de.ibm.com)
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*
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* Derived from "include/asm-i386/pgalloc.h"
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* Copyright (C) 1994 Linus Torvalds
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*/
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#ifndef _S390_PGALLOC_H
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#define _S390_PGALLOC_H
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#include <linux/threads.h>
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#include <linux/gfp.h>
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#include <linux/mm.h>
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unsigned long *crst_table_alloc(struct mm_struct *);
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void crst_table_free(struct mm_struct *, unsigned long *);
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unsigned long *page_table_alloc(struct mm_struct *, unsigned long);
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void page_table_free(struct mm_struct *, unsigned long *);
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void page_table_free_rcu(struct mmu_gather *, unsigned long *);
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static inline void clear_table(unsigned long *s, unsigned long val, size_t n)
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{
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typedef struct { char _[n]; } addrtype;
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*s = val;
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n = (n / 256) - 1;
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asm volatile(
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#ifdef CONFIG_64BIT
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" mvc 8(248,%0),0(%0)\n"
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#else
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" mvc 4(252,%0),0(%0)\n"
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#endif
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"0: mvc 256(256,%0),0(%0)\n"
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" la %0,256(%0)\n"
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" brct %1,0b\n"
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: "+a" (s), "+d" (n), "=m" (*(addrtype *) s)
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: "m" (*(addrtype *) s));
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}
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static inline void crst_table_init(unsigned long *crst, unsigned long entry)
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{
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clear_table(crst, entry, sizeof(unsigned long)*2048);
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}
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#ifndef CONFIG_64BIT
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static inline unsigned long pgd_entry_type(struct mm_struct *mm)
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{
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return _SEGMENT_ENTRY_EMPTY;
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}
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#define pud_alloc_one(mm,address) ({ BUG(); ((pud_t *)2); })
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#define pud_free(mm, x) do { } while (0)
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#define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); })
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#define pmd_free(mm, x) do { } while (0)
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#define pgd_populate(mm, pgd, pud) BUG()
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#define pud_populate(mm, pud, pmd) BUG()
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#else /* CONFIG_64BIT */
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static inline unsigned long pgd_entry_type(struct mm_struct *mm)
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{
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if (mm->context.asce_limit <= (1UL << 31))
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return _SEGMENT_ENTRY_EMPTY;
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if (mm->context.asce_limit <= (1UL << 42))
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return _REGION3_ENTRY_EMPTY;
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return _REGION2_ENTRY_EMPTY;
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}
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int crst_table_upgrade(struct mm_struct *, unsigned long limit);
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void crst_table_downgrade(struct mm_struct *, unsigned long limit);
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static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long address)
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{
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unsigned long *table = crst_table_alloc(mm);
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if (table)
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crst_table_init(table, _REGION3_ENTRY_EMPTY);
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return (pud_t *) table;
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}
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#define pud_free(mm, pud) crst_table_free(mm, (unsigned long *) pud)
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static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long vmaddr)
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{
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unsigned long *table = crst_table_alloc(mm);
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if (table)
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crst_table_init(table, _SEGMENT_ENTRY_EMPTY);
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return (pmd_t *) table;
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}
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#define pmd_free(mm, pmd) crst_table_free(mm, (unsigned long *) pmd)
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static inline void pgd_populate(struct mm_struct *mm, pgd_t *pgd, pud_t *pud)
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{
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pgd_val(*pgd) = _REGION2_ENTRY | __pa(pud);
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}
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static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
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{
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pud_val(*pud) = _REGION3_ENTRY | __pa(pmd);
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}
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#endif /* CONFIG_64BIT */
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static inline pgd_t *pgd_alloc(struct mm_struct *mm)
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{
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spin_lock_init(&mm->context.list_lock);
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INIT_LIST_HEAD(&mm->context.pgtable_list);
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INIT_LIST_HEAD(&mm->context.gmap_list);
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return (pgd_t *) crst_table_alloc(mm);
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}
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#define pgd_free(mm, pgd) crst_table_free(mm, (unsigned long *) pgd)
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static inline void pmd_populate(struct mm_struct *mm,
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pmd_t *pmd, pgtable_t pte)
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{
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pmd_val(*pmd) = _SEGMENT_ENTRY + __pa(pte);
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}
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#define pmd_populate_kernel(mm, pmd, pte) pmd_populate(mm, pmd, pte)
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#define pmd_pgtable(pmd) \
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(pgtable_t)(pmd_val(pmd) & -sizeof(pte_t)*PTRS_PER_PTE)
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/*
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* page table entry allocation/free routines.
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*/
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#define pte_alloc_one_kernel(mm, vmaddr) ((pte_t *) page_table_alloc(mm, vmaddr))
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#define pte_alloc_one(mm, vmaddr) ((pte_t *) page_table_alloc(mm, vmaddr))
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#define pte_free_kernel(mm, pte) page_table_free(mm, (unsigned long *) pte)
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#define pte_free(mm, pte) page_table_free(mm, (unsigned long *) pte)
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extern void rcu_table_freelist_finish(void);
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#endif /* _S390_PGALLOC_H */
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