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Linux/arch/sparc/include/asm/page_64.h

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 #ifndef _SPARC64_PAGE_H
  3 #define _SPARC64_PAGE_H
  4 
  5 #include <linux/const.h>
  6 
  7 #define PAGE_SHIFT   13
  8 
  9 #define PAGE_SIZE    (_AC(1,UL) << PAGE_SHIFT)
 10 #define PAGE_MASK    (~(PAGE_SIZE-1))
 11 
 12 /* Flushing for D-cache alias handling is only needed if
 13  * the page size is smaller than 16K.
 14  */
 15 #if PAGE_SHIFT < 14
 16 #define DCACHE_ALIASING_POSSIBLE
 17 #endif
 18 
 19 #define HPAGE_SHIFT             23
 20 #define REAL_HPAGE_SHIFT        22
 21 #define HPAGE_16GB_SHIFT        34
 22 #define HPAGE_2GB_SHIFT         31
 23 #define HPAGE_256MB_SHIFT       28
 24 #define HPAGE_64K_SHIFT         16
 25 #define REAL_HPAGE_SIZE         (_AC(1,UL) << REAL_HPAGE_SHIFT)
 26 
 27 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
 28 #define HPAGE_SIZE              (_AC(1,UL) << HPAGE_SHIFT)
 29 #define HPAGE_MASK              (~(HPAGE_SIZE - 1UL))
 30 #define HUGETLB_PAGE_ORDER      (HPAGE_SHIFT - PAGE_SHIFT)
 31 #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
 32 #define REAL_HPAGE_PER_HPAGE    (_AC(1,UL) << (HPAGE_SHIFT - REAL_HPAGE_SHIFT))
 33 #define HUGE_MAX_HSTATE         5
 34 #endif
 35 
 36 #ifndef __ASSEMBLY__
 37 
 38 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
 39 struct pt_regs;
 40 void hugetlb_setup(struct pt_regs *regs);
 41 #endif
 42 
 43 #define WANT_PAGE_VIRTUAL
 44 
 45 void _clear_page(void *page);
 46 #define clear_page(X)   _clear_page((void *)(X))
 47 struct page;
 48 void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
 49 #define copy_page(X,Y)  memcpy((void *)(X), (void *)(Y), PAGE_SIZE)
 50 void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage);
 51 
 52 /* Unlike sparc32, sparc64's parameter passing API is more
 53  * sane in that structures which as small enough are passed
 54  * in registers instead of on the stack.  Thus, setting
 55  * STRICT_MM_TYPECHECKS does not generate worse code so
 56  * let's enable it to get the type checking.
 57  */
 58 
 59 #define STRICT_MM_TYPECHECKS
 60 
 61 #ifdef STRICT_MM_TYPECHECKS
 62 /* These are used to make use of C type-checking.. */
 63 typedef struct { unsigned long pte; } pte_t;
 64 typedef struct { unsigned long iopte; } iopte_t;
 65 typedef struct { unsigned long pmd; } pmd_t;
 66 typedef struct { unsigned long pud; } pud_t;
 67 typedef struct { unsigned long pgd; } pgd_t;
 68 typedef struct { unsigned long pgprot; } pgprot_t;
 69 
 70 #define pte_val(x)      ((x).pte)
 71 #define iopte_val(x)    ((x).iopte)
 72 #define pmd_val(x)      ((x).pmd)
 73 #define pud_val(x)      ((x).pud)
 74 #define pgd_val(x)      ((x).pgd)
 75 #define pgprot_val(x)   ((x).pgprot)
 76 
 77 #define __pte(x)        ((pte_t) { (x) } )
 78 #define __iopte(x)      ((iopte_t) { (x) } )
 79 #define __pmd(x)        ((pmd_t) { (x) } )
 80 #define __pud(x)        ((pud_t) { (x) } )
 81 #define __pgd(x)        ((pgd_t) { (x) } )
 82 #define __pgprot(x)     ((pgprot_t) { (x) } )
 83 
 84 #else
 85 /* .. while these make it easier on the compiler */
 86 typedef unsigned long pte_t;
 87 typedef unsigned long iopte_t;
 88 typedef unsigned long pmd_t;
 89 typedef unsigned long pud_t;
 90 typedef unsigned long pgd_t;
 91 typedef unsigned long pgprot_t;
 92 
 93 #define pte_val(x)      (x)
 94 #define iopte_val(x)    (x)
 95 #define pmd_val(x)      (x)
 96 #define pud_val(x)      (x)
 97 #define pgd_val(x)      (x)
 98 #define pgprot_val(x)   (x)
 99 
100 #define __pte(x)        (x)
101 #define __iopte(x)      (x)
102 #define __pmd(x)        (x)
103 #define __pud(x)        (x)
104 #define __pgd(x)        (x)
105 #define __pgprot(x)     (x)
106 
107 #endif /* (STRICT_MM_TYPECHECKS) */
108 
109 typedef pte_t *pgtable_t;
110 
111 extern unsigned long sparc64_va_hole_top;
112 extern unsigned long sparc64_va_hole_bottom;
113 
114 /* The next two defines specify the actual exclusion region we
115  * enforce, wherein we use a 4GB red zone on each side of the VA hole.
116  */
117 #define VA_EXCLUDE_START (sparc64_va_hole_bottom - (1UL << 32UL))
118 #define VA_EXCLUDE_END   (sparc64_va_hole_top + (1UL << 32UL))
119 
120 #define TASK_UNMAPPED_BASE      (test_thread_flag(TIF_32BIT) ? \
121                                  _AC(0x0000000070000000,UL) : \
122                                  VA_EXCLUDE_END)
123 
124 #include <asm-generic/memory_model.h>
125 
126 extern unsigned long PAGE_OFFSET;
127 
128 #endif /* !(__ASSEMBLY__) */
129 
130 /* The maximum number of physical memory address bits we support.  The
131  * largest value we can support is whatever "KPGD_SHIFT + KPTE_BITS"
132  * evaluates to.
133  */
134 #define MAX_PHYS_ADDRESS_BITS   53
135 
136 #define ILOG2_4MB               22
137 #define ILOG2_256MB             28
138 
139 #ifndef __ASSEMBLY__
140 
141 #define __pa(x)                 ((unsigned long)(x) - PAGE_OFFSET)
142 #define __va(x)                 ((void *)((unsigned long) (x) + PAGE_OFFSET))
143 
144 #define pfn_to_kaddr(pfn)       __va((pfn) << PAGE_SHIFT)
145 
146 #define virt_to_page(kaddr)     pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)
147 
148 #define virt_addr_valid(kaddr)  pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
149 
150 #define virt_to_phys __pa
151 #define phys_to_virt __va
152 
153 #endif /* !(__ASSEMBLY__) */
154 
155 #define VM_DATA_DEFAULT_FLAGS   (VM_READ | VM_WRITE | VM_EXEC | \
156                                  VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
157 
158 #include <asm-generic/getorder.h>
159 
160 #endif /* _SPARC64_PAGE_H */
161 

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