1 #ifndef _SPARC64_PAGE_H
2 #define _SPARC64_PAGE_H
4 #include <linux/const.h>
8 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
9 #define PAGE_MASK (~(PAGE_SIZE-1))
11 /* Flushing for D-cache alias handling is only needed if
12 * the page size is smaller than 16K.
15 #define DCACHE_ALIASING_POSSIBLE
18 #define HPAGE_SHIFT 23
19 #define REAL_HPAGE_SHIFT 22
20 #define HPAGE_256MB_SHIFT 28
21 #define HPAGE_64K_SHIFT 16
22 #define REAL_HPAGE_SIZE (_AC(1,UL) << REAL_HPAGE_SHIFT)
24 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
25 #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
26 #define HPAGE_MASK (~(HPAGE_SIZE - 1UL))
27 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
28 #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
29 #define REAL_HPAGE_PER_HPAGE (_AC(1,UL) << (HPAGE_SHIFT - REAL_HPAGE_SHIFT))
30 #define HUGE_MAX_HSTATE 3
35 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
37 void hugetlb_setup(struct pt_regs *regs);
40 #define WANT_PAGE_VIRTUAL
42 void _clear_page(void *page);
43 #define clear_page(X) _clear_page((void *)(X))
45 void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
46 #define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE)
47 void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage);
49 /* Unlike sparc32, sparc64's parameter passing API is more
50 * sane in that structures which as small enough are passed
51 * in registers instead of on the stack. Thus, setting
52 * STRICT_MM_TYPECHECKS does not generate worse code so
53 * let's enable it to get the type checking.
56 #define STRICT_MM_TYPECHECKS
58 #ifdef STRICT_MM_TYPECHECKS
59 /* These are used to make use of C type-checking.. */
60 typedef struct { unsigned long pte; } pte_t;
61 typedef struct { unsigned long iopte; } iopte_t;
62 typedef struct { unsigned long pmd; } pmd_t;
63 typedef struct { unsigned long pud; } pud_t;
64 typedef struct { unsigned long pgd; } pgd_t;
65 typedef struct { unsigned long pgprot; } pgprot_t;
67 #define pte_val(x) ((x).pte)
68 #define iopte_val(x) ((x).iopte)
69 #define pmd_val(x) ((x).pmd)
70 #define pud_val(x) ((x).pud)
71 #define pgd_val(x) ((x).pgd)
72 #define pgprot_val(x) ((x).pgprot)
74 #define __pte(x) ((pte_t) { (x) } )
75 #define __iopte(x) ((iopte_t) { (x) } )
76 #define __pmd(x) ((pmd_t) { (x) } )
77 #define __pud(x) ((pud_t) { (x) } )
78 #define __pgd(x) ((pgd_t) { (x) } )
79 #define __pgprot(x) ((pgprot_t) { (x) } )
82 /* .. while these make it easier on the compiler */
83 typedef unsigned long pte_t;
84 typedef unsigned long iopte_t;
85 typedef unsigned long pmd_t;
86 typedef unsigned long pud_t;
87 typedef unsigned long pgd_t;
88 typedef unsigned long pgprot_t;
90 #define pte_val(x) (x)
91 #define iopte_val(x) (x)
92 #define pmd_val(x) (x)
93 #define pud_val(x) (x)
94 #define pgd_val(x) (x)
95 #define pgprot_val(x) (x)
98 #define __iopte(x) (x)
102 #define __pgprot(x) (x)
104 #endif /* (STRICT_MM_TYPECHECKS) */
106 typedef pte_t *pgtable_t;
108 extern unsigned long sparc64_va_hole_top;
109 extern unsigned long sparc64_va_hole_bottom;
111 /* The next two defines specify the actual exclusion region we
112 * enforce, wherein we use a 4GB red zone on each side of the VA hole.
114 #define VA_EXCLUDE_START (sparc64_va_hole_bottom - (1UL << 32UL))
115 #define VA_EXCLUDE_END (sparc64_va_hole_top + (1UL << 32UL))
117 #define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \
118 _AC(0x0000000070000000,UL) : \
121 #include <asm-generic/memory_model.h>
123 extern unsigned long PAGE_OFFSET;
125 #endif /* !(__ASSEMBLY__) */
127 /* The maximum number of physical memory address bits we support. The
128 * largest value we can support is whatever "KPGD_SHIFT + KPTE_BITS"
131 #define MAX_PHYS_ADDRESS_BITS 53
134 #define ILOG2_256MB 28
138 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
139 #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
141 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
143 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)
145 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
147 #define virt_to_phys __pa
148 #define phys_to_virt __va
150 #endif /* !(__ASSEMBLY__) */
152 #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
153 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
155 #include <asm-generic/getorder.h>
157 #endif /* _SPARC64_PAGE_H */