| /* |
| * S390 version |
| * Copyright IBM Corp. 1999, 2000 |
| * 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 unsigned long pfmf(unsigned long function, unsigned long address) |
| { |
| asm volatile( |
| " .insn rre,0xb9af0000,%[function],%[address]" |
| : [address] "+a" (address) |
| : [function] "d" (function) |
| : "memory"); |
| return address; |
| } |
| |
| static inline void clear_page(void *page) |
| { |
| if (MACHINE_HAS_PFMF) { |
| pfmf(0x10000, (unsigned long)page); |
| } 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 pgste; } pgste_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 pgste_val(x) ((x).pgste) |
| #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 __pgste(x) ((pgste_t) { (x) } ) |
| #define __pte(x) ((pte_t) { (x) } ) |
| #define __pmd(x) ((pmd_t) { (x) } ) |
| #define __pud(x) ((pud_t) { (x) } ) |
| #define __pgd(x) ((pgd_t) { (x) } ) |
| #define __pgprot(x) ((pgprot_t) { (x) } ) |
| |
| static inline void page_set_storage_key(unsigned long addr, |
| unsigned char skey, int mapped) |
| { |
| if (!mapped) |
| asm volatile(".insn rrf,0xb22b0000,%0,%1,8,0" |
| : : "d" (skey), "a" (addr)); |
| else |
| asm volatile("sske %0,%1" : : "d" (skey), "a" (addr)); |
| } |
| |
| static inline unsigned char page_get_storage_key(unsigned long addr) |
| { |
| unsigned char skey; |
| |
| asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr)); |
| return skey; |
| } |
| |
| static inline int page_reset_referenced(unsigned long addr) |
| { |
| unsigned int ipm; |
| |
| asm volatile( |
| " rrbe 0,%1\n" |
| " ipm %0\n" |
| : "=d" (ipm) : "a" (addr) : "cc"); |
| return !!(ipm & 0x20000000); |
| } |
| |
| /* Bits int the storage key */ |
| #define _PAGE_CHANGED 0x02 /* HW changed bit */ |
| #define _PAGE_REFERENCED 0x04 /* HW referenced bit */ |
| #define _PAGE_FP_BIT 0x08 /* HW fetch protection bit */ |
| #define _PAGE_ACC_BITS 0xf0 /* HW access control bits */ |
| |
| /* |
| * Test and clear dirty bit in storage key. |
| * We can't clear the changed bit atomically. This is a potential |
| * race against modification of the referenced bit. This function |
| * should therefore only be called if it is not mapped in any |
| * address space. |
| */ |
| #define __HAVE_ARCH_PAGE_TEST_AND_CLEAR_DIRTY |
| static inline int page_test_and_clear_dirty(unsigned long pfn, int mapped) |
| { |
| unsigned char skey; |
| |
| skey = page_get_storage_key(pfn << PAGE_SHIFT); |
| if (!(skey & _PAGE_CHANGED)) |
| return 0; |
| page_set_storage_key(pfn << PAGE_SHIFT, skey & ~_PAGE_CHANGED, mapped); |
| return 1; |
| } |
| |
| /* |
| * Test and clear referenced bit in storage key. |
| */ |
| #define __HAVE_ARCH_PAGE_TEST_AND_CLEAR_YOUNG |
| static inline int page_test_and_clear_young(unsigned long pfn) |
| { |
| return page_reset_referenced(pfn << PAGE_SHIFT); |
| } |
| |
| struct page; |
| void arch_free_page(struct page *page, int order); |
| void arch_alloc_page(struct page *page, int order); |
| void arch_set_page_states(int make_stable); |
| |
| static inline int devmem_is_allowed(unsigned long pfn) |
| { |
| return 0; |
| } |
| |
| #define HAVE_ARCH_FREE_PAGE |
| #define HAVE_ARCH_ALLOC_PAGE |
| |
| #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/getorder.h> |
| |
| #define __HAVE_ARCH_GATE_AREA 1 |
| |
| #endif /* _S390_PAGE_H */ |