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-rw-r--r--include/asm-s390/hugetlb.h184
1 files changed, 0 insertions, 184 deletions
diff --git a/include/asm-s390/hugetlb.h b/include/asm-s390/hugetlb.h
deleted file mode 100644
index 670a1d1745d2..000000000000
--- a/include/asm-s390/hugetlb.h
+++ /dev/null
@@ -1,184 +0,0 @@
-/*
- * IBM System z Huge TLB Page Support for Kernel.
- *
- * Copyright IBM Corp. 2008
- * Author(s): Gerald Schaefer <gerald.schaefer@de.ibm.com>
- */
-
-#ifndef _ASM_S390_HUGETLB_H
-#define _ASM_S390_HUGETLB_H
-
-#include <asm/page.h>
-#include <asm/pgtable.h>
-
-
-#define is_hugepage_only_range(mm, addr, len) 0
-#define hugetlb_free_pgd_range free_pgd_range
-
-void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
- pte_t *ptep, pte_t pte);
-
-/*
- * If the arch doesn't supply something else, assume that hugepage
- * size aligned regions are ok without further preparation.
- */
-static inline int prepare_hugepage_range(struct file *file,
- unsigned long addr, unsigned long len)
-{
- if (len & ~HPAGE_MASK)
- return -EINVAL;
- if (addr & ~HPAGE_MASK)
- return -EINVAL;
- return 0;
-}
-
-#define hugetlb_prefault_arch_hook(mm) do { } while (0)
-
-int arch_prepare_hugepage(struct page *page);
-void arch_release_hugepage(struct page *page);
-
-static inline pte_t pte_mkhuge(pte_t pte)
-{
- /*
- * PROT_NONE needs to be remapped from the pte type to the ste type.
- * The HW invalid bit is also different for pte and ste. The pte
- * invalid bit happens to be the same as the ste _SEGMENT_ENTRY_LARGE
- * bit, so we don't have to clear it.
- */
- if (pte_val(pte) & _PAGE_INVALID) {
- if (pte_val(pte) & _PAGE_SWT)
- pte_val(pte) |= _HPAGE_TYPE_NONE;
- pte_val(pte) |= _SEGMENT_ENTRY_INV;
- }
- /*
- * Clear SW pte bits SWT and SWX, there are no SW bits in a segment
- * table entry.
- */
- pte_val(pte) &= ~(_PAGE_SWT | _PAGE_SWX);
- /*
- * Also set the change-override bit because we don't need dirty bit
- * tracking for hugetlbfs pages.
- */
- pte_val(pte) |= (_SEGMENT_ENTRY_LARGE | _SEGMENT_ENTRY_CO);
- return pte;
-}
-
-static inline pte_t huge_pte_wrprotect(pte_t pte)
-{
- pte_val(pte) |= _PAGE_RO;
- return pte;
-}
-
-static inline int huge_pte_none(pte_t pte)
-{
- return (pte_val(pte) & _SEGMENT_ENTRY_INV) &&
- !(pte_val(pte) & _SEGMENT_ENTRY_RO);
-}
-
-static inline pte_t huge_ptep_get(pte_t *ptep)
-{
- pte_t pte = *ptep;
- unsigned long mask;
-
- if (!MACHINE_HAS_HPAGE) {
- ptep = (pte_t *) (pte_val(pte) & _SEGMENT_ENTRY_ORIGIN);
- if (ptep) {
- mask = pte_val(pte) &
- (_SEGMENT_ENTRY_INV | _SEGMENT_ENTRY_RO);
- pte = pte_mkhuge(*ptep);
- pte_val(pte) |= mask;
- }
- }
- return pte;
-}
-
-static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
- unsigned long addr, pte_t *ptep)
-{
- pte_t pte = huge_ptep_get(ptep);
-
- pmd_clear((pmd_t *) ptep);
- return pte;
-}
-
-static inline void __pmd_csp(pmd_t *pmdp)
-{
- register unsigned long reg2 asm("2") = pmd_val(*pmdp);
- register unsigned long reg3 asm("3") = pmd_val(*pmdp) |
- _SEGMENT_ENTRY_INV;
- register unsigned long reg4 asm("4") = ((unsigned long) pmdp) + 5;
-
- asm volatile(
- " csp %1,%3"
- : "=m" (*pmdp)
- : "d" (reg2), "d" (reg3), "d" (reg4), "m" (*pmdp) : "cc");
- pmd_val(*pmdp) = _SEGMENT_ENTRY_INV | _SEGMENT_ENTRY;
-}
-
-static inline void __pmd_idte(unsigned long address, pmd_t *pmdp)
-{
- unsigned long sto = (unsigned long) pmdp -
- pmd_index(address) * sizeof(pmd_t);
-
- if (!(pmd_val(*pmdp) & _SEGMENT_ENTRY_INV)) {
- asm volatile(
- " .insn rrf,0xb98e0000,%2,%3,0,0"
- : "=m" (*pmdp)
- : "m" (*pmdp), "a" (sto),
- "a" ((address & HPAGE_MASK))
- );
- }
- pmd_val(*pmdp) = _SEGMENT_ENTRY_INV | _SEGMENT_ENTRY;
-}
-
-static inline void huge_ptep_invalidate(struct mm_struct *mm,
- unsigned long address, pte_t *ptep)
-{
- pmd_t *pmdp = (pmd_t *) ptep;
-
- if (!MACHINE_HAS_IDTE) {
- __pmd_csp(pmdp);
- if (mm->context.noexec) {
- pmdp = get_shadow_table(pmdp);
- __pmd_csp(pmdp);
- }
- return;
- }
-
- __pmd_idte(address, pmdp);
- if (mm->context.noexec) {
- pmdp = get_shadow_table(pmdp);
- __pmd_idte(address, pmdp);
- }
- return;
-}
-
-#define huge_ptep_set_access_flags(__vma, __addr, __ptep, __entry, __dirty) \
-({ \
- int __changed = !pte_same(huge_ptep_get(__ptep), __entry); \
- if (__changed) { \
- huge_ptep_invalidate((__vma)->vm_mm, __addr, __ptep); \
- set_huge_pte_at((__vma)->vm_mm, __addr, __ptep, __entry); \
- } \
- __changed; \
-})
-
-#define huge_ptep_set_wrprotect(__mm, __addr, __ptep) \
-({ \
- pte_t __pte = huge_ptep_get(__ptep); \
- if (pte_write(__pte)) { \
- if (atomic_read(&(__mm)->mm_users) > 1 || \
- (__mm) != current->active_mm) \
- huge_ptep_invalidate(__mm, __addr, __ptep); \
- set_huge_pte_at(__mm, __addr, __ptep, \
- huge_pte_wrprotect(__pte)); \
- } \
-})
-
-static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
- unsigned long address, pte_t *ptep)
-{
- huge_ptep_invalidate(vma->vm_mm, address, ptep);
-}
-
-#endif /* _ASM_S390_HUGETLB_H */