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 CONFIG_PAGE_SHIFT
8 #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
9 #define PAGE_MASK (~(PAGE_SIZE-1))
10
11 /* Flushing for D-cache alias handling is only needed if
12 * the page size is smaller than 16K.
13 */
14 #if PAGE_SHIFT < 14
15 #define DCACHE_ALIASING_POSSIBLE
16 #endif
17
18 #define HPAGE_SHIFT 23
19 #define REAL_HPAGE_SHIFT 22
20 #define HPAGE_16GB_SHIFT 34
21 #define HPAGE_2GB_SHIFT 31
22 #define HPAGE_256MB_SHIFT 28
23 #define HPAGE_64K_SHIFT 16
24 #define REAL_HPAGE_SIZE (_AC(1,UL) << REAL_HPAGE_SHIFT)
25
26 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
27 #define HPAGE_SIZE (_AC(1,UL) << HPAGE_SHIFT)
28 #define HPAGE_MASK (~(HPAGE_SIZE - 1UL))
29 #define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
30 #define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
31 #define REAL_HPAGE_PER_HPAGE (_AC(1,UL) << (HPAGE_SHIFT - REAL_HPAGE_SHIFT))
32 #define HUGE_MAX_HSTATE 5
33 #endif
34
35 #ifndef __ASSEMBLY__
36
37 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
38 struct pt_regs;
39 void hugetlb_setup(struct pt_regs *regs);
40 #endif
41
42 #define WANT_PAGE_VIRTUAL
43
44 void _clear_page(void *page);
45 #define clear_page(X) _clear_page((void *)(X))
46 struct page;
47 void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
48 #define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE)
49 void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage);
50 #define __HAVE_ARCH_COPY_USER_HIGHPAGE
51 struct vm_area_struct;
52 void copy_user_highpage(struct page *to, struct page *from,
53 unsigned long vaddr, struct vm_area_struct *vma);
54 #define __HAVE_ARCH_COPY_HIGHPAGE
55 void copy_highpage(struct page *to, struct page *from);
56
57 /* Unlike sparc32, sparc64's parameter passing API is more
58 * sane in that structures which as small enough are passed
59 * in registers instead of on the stack. Thus, setting
60 * STRICT_MM_TYPECHECKS does not generate worse code so
61 * let's enable it to get the type checking.
62 */
63
64 #define STRICT_MM_TYPECHECKS
65
66 #ifdef STRICT_MM_TYPECHECKS
67 /* These are used to make use of C type-checking.. */
68 typedef struct { unsigned long pte; } pte_t;
69 typedef struct { unsigned long iopte; } iopte_t;
70 typedef struct { unsigned long pmd; } pmd_t;
71 typedef struct { unsigned long pud; } pud_t;
72 typedef struct { unsigned long pgd; } pgd_t;
73 typedef struct { unsigned long pgprot; } pgprot_t;
74
75 #define pte_val(x) ((x).pte)
76 #define iopte_val(x) ((x).iopte)
77 #define pmd_val(x) ((x).pmd)
78 #define pud_val(x) ((x).pud)
79 #define pgd_val(x) ((x).pgd)
80 #define pgprot_val(x) ((x).pgprot)
81
82 #define __pte(x) ((pte_t) { (x) } )
83 #define __iopte(x) ((iopte_t) { (x) } )
84 #define __pmd(x) ((pmd_t) { (x) } )
85 #define __pud(x) ((pud_t) { (x) } )
86 #define __pgd(x) ((pgd_t) { (x) } )
87 #define __pgprot(x) ((pgprot_t) { (x) } )
88
89 #else
90 /* .. while these make it easier on the compiler */
91 typedef unsigned long pte_t;
92 typedef unsigned long iopte_t;
93 typedef unsigned long pmd_t;
94 typedef unsigned long pud_t;
95 typedef unsigned long pgd_t;
96 typedef unsigned long pgprot_t;
97
98 #define pte_val(x) (x)
99 #define iopte_val(x) (x)
100 #define pmd_val(x) (x)
101 #define pud_val(x) (x)
102 #define pgd_val(x) (x)
103 #define pgprot_val(x) (x)
104
105 #define __pte(x) (x)
106 #define __iopte(x) (x)
107 #define __pmd(x) (x)
108 #define __pud(x) (x)
109 #define __pgd(x) (x)
110 #define __pgprot(x) (x)
111
112 #endif /* (STRICT_MM_TYPECHECKS) */
113
114 typedef pte_t *pgtable_t;
115
116 extern unsigned long sparc64_va_hole_top;
117 extern unsigned long sparc64_va_hole_bottom;
118
119 /* The next two defines specify the actual exclusion region we
120 * enforce, wherein we use a 4GB red zone on each side of the VA hole.
121 */
122 #define VA_EXCLUDE_START (sparc64_va_hole_bottom - (1UL << 32UL))
123 #define VA_EXCLUDE_END (sparc64_va_hole_top + (1UL << 32UL))
124
125 #define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \
126 _AC(0x0000000070000000,UL) : \
127 VA_EXCLUDE_END)
128
129 #include <asm-generic/memory_model.h>
130
131 extern unsigned long PAGE_OFFSET;
132
133 #endif /* !(__ASSEMBLY__) */
134
135 /* The maximum number of physical memory address bits we support. The
136 * largest value we can support is whatever "KPGD_SHIFT + KPTE_BITS"
137 * evaluates to.
138 */
139 #define MAX_PHYS_ADDRESS_BITS 53
140
141 #define ILOG2_4MB 22
142 #define ILOG2_256MB 28
143
144 #ifndef __ASSEMBLY__
145
146 #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
147 #define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
148
149 #define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
150
151 #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)
152
153 #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
154
155 #define virt_to_phys __pa
156 #define phys_to_virt __va
157
158 #endif /* !(__ASSEMBLY__) */
159
160 #include <asm-generic/getorder.h>
161
162 #endif /* _SPARC64_PAGE_H */
163
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