page.h 5.2 KB

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  1. /*
  2. * S390 version
  3. * Copyright IBM Corp. 1999, 2000
  4. * Author(s): Hartmut Penner (hp@de.ibm.com)
  5. */
  6. #ifndef _S390_PAGE_H
  7. #define _S390_PAGE_H
  8. #include <linux/const.h>
  9. #include <asm/types.h>
  10. /* PAGE_SHIFT determines the page size */
  11. #define PAGE_SHIFT 12
  12. #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
  13. #define PAGE_MASK (~(PAGE_SIZE-1))
  14. #define PAGE_DEFAULT_ACC 0
  15. #define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4)
  16. #define HPAGE_SHIFT 20
  17. #define HPAGE_SIZE (1UL << HPAGE_SHIFT)
  18. #define HPAGE_MASK (~(HPAGE_SIZE - 1))
  19. #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
  20. #define ARCH_HAS_SETCLEAR_HUGE_PTE
  21. #define ARCH_HAS_HUGE_PTE_TYPE
  22. #define ARCH_HAS_PREPARE_HUGEPAGE
  23. #define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH
  24. #include <asm/setup.h>
  25. #ifndef __ASSEMBLY__
  26. void storage_key_init_range(unsigned long start, unsigned long end);
  27. static inline unsigned long pfmf(unsigned long function, unsigned long address)
  28. {
  29. asm volatile(
  30. " .insn rre,0xb9af0000,%[function],%[address]"
  31. : [address] "+a" (address)
  32. : [function] "d" (function)
  33. : "memory");
  34. return address;
  35. }
  36. static inline void clear_page(void *page)
  37. {
  38. register unsigned long reg1 asm ("1") = 0;
  39. register void *reg2 asm ("2") = page;
  40. register unsigned long reg3 asm ("3") = 4096;
  41. asm volatile(
  42. " mvcl 2,0"
  43. : "+d" (reg2), "+d" (reg3) : "d" (reg1)
  44. : "memory", "cc");
  45. }
  46. static inline void copy_page(void *to, void *from)
  47. {
  48. if (MACHINE_HAS_MVPG) {
  49. register unsigned long reg0 asm ("0") = 0;
  50. asm volatile(
  51. " mvpg %0,%1"
  52. : : "a" (to), "a" (from), "d" (reg0)
  53. : "memory", "cc");
  54. } else
  55. asm volatile(
  56. " mvc 0(256,%0),0(%1)\n"
  57. " mvc 256(256,%0),256(%1)\n"
  58. " mvc 512(256,%0),512(%1)\n"
  59. " mvc 768(256,%0),768(%1)\n"
  60. " mvc 1024(256,%0),1024(%1)\n"
  61. " mvc 1280(256,%0),1280(%1)\n"
  62. " mvc 1536(256,%0),1536(%1)\n"
  63. " mvc 1792(256,%0),1792(%1)\n"
  64. " mvc 2048(256,%0),2048(%1)\n"
  65. " mvc 2304(256,%0),2304(%1)\n"
  66. " mvc 2560(256,%0),2560(%1)\n"
  67. " mvc 2816(256,%0),2816(%1)\n"
  68. " mvc 3072(256,%0),3072(%1)\n"
  69. " mvc 3328(256,%0),3328(%1)\n"
  70. " mvc 3584(256,%0),3584(%1)\n"
  71. " mvc 3840(256,%0),3840(%1)\n"
  72. : : "a" (to), "a" (from) : "memory");
  73. }
  74. #define clear_user_page(page, vaddr, pg) clear_page(page)
  75. #define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
  76. #define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
  77. alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
  78. #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
  79. /*
  80. * These are used to make use of C type-checking..
  81. */
  82. typedef struct { unsigned long pgprot; } pgprot_t;
  83. typedef struct { unsigned long pgste; } pgste_t;
  84. typedef struct { unsigned long pte; } pte_t;
  85. typedef struct { unsigned long pmd; } pmd_t;
  86. typedef struct { unsigned long pud; } pud_t;
  87. typedef struct { unsigned long pgd; } pgd_t;
  88. typedef pte_t *pgtable_t;
  89. #define pgprot_val(x) ((x).pgprot)
  90. #define pgste_val(x) ((x).pgste)
  91. #define pte_val(x) ((x).pte)
  92. #define pmd_val(x) ((x).pmd)
  93. #define pud_val(x) ((x).pud)
  94. #define pgd_val(x) ((x).pgd)
  95. #define __pgste(x) ((pgste_t) { (x) } )
  96. #define __pte(x) ((pte_t) { (x) } )
  97. #define __pmd(x) ((pmd_t) { (x) } )
  98. #define __pud(x) ((pud_t) { (x) } )
  99. #define __pgd(x) ((pgd_t) { (x) } )
  100. #define __pgprot(x) ((pgprot_t) { (x) } )
  101. static inline void page_set_storage_key(unsigned long addr,
  102. unsigned char skey, int mapped)
  103. {
  104. if (!mapped)
  105. asm volatile(".insn rrf,0xb22b0000,%0,%1,8,0"
  106. : : "d" (skey), "a" (addr));
  107. else
  108. asm volatile("sske %0,%1" : : "d" (skey), "a" (addr));
  109. }
  110. static inline unsigned char page_get_storage_key(unsigned long addr)
  111. {
  112. unsigned char skey;
  113. asm volatile("iske %0,%1" : "=d" (skey) : "a" (addr));
  114. return skey;
  115. }
  116. static inline int page_reset_referenced(unsigned long addr)
  117. {
  118. unsigned int ipm;
  119. asm volatile(
  120. " rrbe 0,%1\n"
  121. " ipm %0\n"
  122. : "=d" (ipm) : "a" (addr) : "cc");
  123. return !!(ipm & 0x20000000);
  124. }
  125. /* Bits int the storage key */
  126. #define _PAGE_CHANGED 0x02 /* HW changed bit */
  127. #define _PAGE_REFERENCED 0x04 /* HW referenced bit */
  128. #define _PAGE_FP_BIT 0x08 /* HW fetch protection bit */
  129. #define _PAGE_ACC_BITS 0xf0 /* HW access control bits */
  130. /*
  131. * Test and clear referenced bit in storage key.
  132. */
  133. #define __HAVE_ARCH_PAGE_TEST_AND_CLEAR_YOUNG
  134. static inline int page_test_and_clear_young(unsigned long pfn)
  135. {
  136. return page_reset_referenced(pfn << PAGE_SHIFT);
  137. }
  138. struct page;
  139. void arch_free_page(struct page *page, int order);
  140. void arch_alloc_page(struct page *page, int order);
  141. void arch_set_page_states(int make_stable);
  142. static inline int devmem_is_allowed(unsigned long pfn)
  143. {
  144. return 0;
  145. }
  146. #define HAVE_ARCH_FREE_PAGE
  147. #define HAVE_ARCH_ALLOC_PAGE
  148. #endif /* !__ASSEMBLY__ */
  149. #define __PAGE_OFFSET 0x0UL
  150. #define PAGE_OFFSET 0x0UL
  151. #define __pa(x) (unsigned long)(x)
  152. #define __va(x) (void *)(unsigned long)(x)
  153. #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
  154. #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
  155. #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
  156. #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \
  157. VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
  158. #include <asm-generic/memory_model.h>
  159. #include <asm-generic/getorder.h>
  160. #define __HAVE_ARCH_GATE_AREA 1
  161. #endif /* _S390_PAGE_H */