1 files changed, 155 insertions, 0 deletions

diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h
new file mode 100644
index 000000000000..991ba939408c
--- /dev/null
+++ b/arch/s390/include/asm/page.h
@@ -0,0 +1,155 @@
+/*
+ *  include/asm-s390/page.h
+ *
+ *  S390 version
+ *    Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Author(s): Hartmut Penner (hp@de.ibm.com)
+ */
+
+#ifndef _S390_PAGE_H
+#define _S390_PAGE_H
+
+#include <linux/const.h>
+#include <asm/types.h>
+
+/* PAGE_SHIFT determines the page size */
+#define PAGE_SHIFT      12
+#define PAGE_SIZE       (_AC(1,UL) << PAGE_SHIFT)
+#define PAGE_MASK       (~(PAGE_SIZE-1))
+#define PAGE_DEFAULT_ACC        0
+#define PAGE_DEFAULT_KEY        (PAGE_DEFAULT_ACC << 4)
+
+#define HPAGE_SHIFT     20
+#define HPAGE_SIZE      (1UL << HPAGE_SHIFT)
+#define HPAGE_MASK      (~(HPAGE_SIZE - 1))
+#define HUGETLB_PAGE_ORDER      (HPAGE_SHIFT - PAGE_SHIFT)
+
+#define ARCH_HAS_SETCLEAR_HUGE_PTE
+#define ARCH_HAS_HUGE_PTE_TYPE
+#define ARCH_HAS_PREPARE_HUGEPAGE
+#define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH
+
+#include <asm/setup.h>
+#ifndef __ASSEMBLY__
+
+static inline void clear_page(void *page)
+{
+        if (MACHINE_HAS_PFMF) {
+                asm volatile(
+                        "       .insn   rre,0xb9af0000,%0,%1"
+                        : : "d" (0x10000), "a" (page) : "memory", "cc");
+        } else {
+                register unsigned long reg1 asm ("1") = 0;
+                register void *reg2 asm ("2") = page;
+                register unsigned long reg3 asm ("3") = 4096;
+                asm volatile(
+                        "       mvcl    2,0"
+                        : "+d" (reg2), "+d" (reg3) : "d" (reg1)
+                        : "memory", "cc");
+        }
+}
+
+static inline void copy_page(void *to, void *from)
+{
+        if (MACHINE_HAS_MVPG) {
+                register unsigned long reg0 asm ("0") = 0;
+                asm volatile(
+                        "       mvpg    %0,%1"
+                        : : "a" (to), "a" (from), "d" (reg0)
+                        : "memory", "cc");
+        } else
+                asm volatile(
+                        "       mvc     0(256,%0),0(%1)\n"
+                        "       mvc     256(256,%0),256(%1)\n"
+                        "       mvc     512(256,%0),512(%1)\n"
+                        "       mvc     768(256,%0),768(%1)\n"
+                        "       mvc     1024(256,%0),1024(%1)\n"
+                        "       mvc     1280(256,%0),1280(%1)\n"
+                        "       mvc     1536(256,%0),1536(%1)\n"
+                        "       mvc     1792(256,%0),1792(%1)\n"
+                        "       mvc     2048(256,%0),2048(%1)\n"
+                        "       mvc     2304(256,%0),2304(%1)\n"
+                        "       mvc     2560(256,%0),2560(%1)\n"
+                        "       mvc     2816(256,%0),2816(%1)\n"
+                        "       mvc     3072(256,%0),3072(%1)\n"
+                        "       mvc     3328(256,%0),3328(%1)\n"
+                        "       mvc     3584(256,%0),3584(%1)\n"
+                        "       mvc     3840(256,%0),3840(%1)\n"
+                        : : "a" (to), "a" (from) : "memory");
+}
+
+#define clear_user_page(page, vaddr, pg)        clear_page(page)
+#define copy_user_page(to, from, vaddr, pg)     copy_page(to, from)
+
+#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
+        alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
+#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
+
+/*
+ * These are used to make use of C type-checking..
+ */
+
+typedef struct { unsigned long pgprot; } pgprot_t;
+typedef struct { unsigned long pte; } pte_t;
+typedef struct { unsigned long pmd; } pmd_t;
+typedef struct { unsigned long pud; } pud_t;
+typedef struct { unsigned long pgd; } pgd_t;
+typedef pte_t *pgtable_t;
+
+#define pgprot_val(x)   ((x).pgprot)
+#define pte_val(x)      ((x).pte)
+#define pmd_val(x)      ((x).pmd)
+#define pud_val(x)      ((x).pud)
+#define pgd_val(x)      ((x).pgd)
+
+#define __pte(x)        ((pte_t) { (x) } )
+#define __pmd(x)        ((pmd_t) { (x) } )
+#define __pgd(x)        ((pgd_t) { (x) } )
+#define __pgprot(x)     ((pgprot_t) { (x) } )
+
+/* default storage key used for all pages */
+extern unsigned int default_storage_key;
+
+static inline void
+page_set_storage_key(unsigned long addr, unsigned int skey)
+{
+        asm volatile("sske %0,%1" : : "d" (skey), "a" (addr));
+}
+
+static inline unsigned int
+page_get_storage_key(unsigned long addr)
+{
+        unsigned int skey;
+
+        asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr), "0" (0));
+        return skey;
+}
+
+#ifdef CONFIG_PAGE_STATES
+
+struct page;
+void arch_free_page(struct page *page, int order);
+void arch_alloc_page(struct page *page, int order);
+
+#define HAVE_ARCH_FREE_PAGE
+#define HAVE_ARCH_ALLOC_PAGE
+
+#endif
+
+#endif /* !__ASSEMBLY__ */
+
+#define __PAGE_OFFSET           0x0UL
+#define PAGE_OFFSET             0x0UL
+#define __pa(x)                 (unsigned long)(x)
+#define __va(x)                 (void *)(unsigned long)(x)
+#define virt_to_page(kaddr)     pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
+#define page_to_phys(page)      (page_to_pfn(page) << PAGE_SHIFT)
+#define virt_addr_valid(kaddr)  pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+
+#define VM_DATA_DEFAULT_FLAGS   (VM_READ | VM_WRITE | \
+                                 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#include <asm-generic/memory_model.h>
+#include <asm-generic/page.h>
+
+#endif /* _S390_PAGE_H */