xref: /openbmc/linux/arch/sparc/include/asm/page_64.h (revision c62da0c3)
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 #define __HAVE_ARCH_COPY_USER_HIGHPAGE
52 struct vm_area_struct;
53 void copy_user_highpage(struct page *to, struct page *from,
54 			unsigned long vaddr, struct vm_area_struct *vma);
55 #define __HAVE_ARCH_COPY_HIGHPAGE
56 void copy_highpage(struct page *to, struct page *from);
57 
58 /* Unlike sparc32, sparc64's parameter passing API is more
59  * sane in that structures which as small enough are passed
60  * in registers instead of on the stack.  Thus, setting
61  * STRICT_MM_TYPECHECKS does not generate worse code so
62  * let's enable it to get the type checking.
63  */
64 
65 #define STRICT_MM_TYPECHECKS
66 
67 #ifdef STRICT_MM_TYPECHECKS
68 /* These are used to make use of C type-checking.. */
69 typedef struct { unsigned long pte; } pte_t;
70 typedef struct { unsigned long iopte; } iopte_t;
71 typedef struct { unsigned long pmd; } pmd_t;
72 typedef struct { unsigned long pud; } pud_t;
73 typedef struct { unsigned long pgd; } pgd_t;
74 typedef struct { unsigned long pgprot; } pgprot_t;
75 
76 #define pte_val(x)	((x).pte)
77 #define iopte_val(x)	((x).iopte)
78 #define pmd_val(x)      ((x).pmd)
79 #define pud_val(x)      ((x).pud)
80 #define pgd_val(x)	((x).pgd)
81 #define pgprot_val(x)	((x).pgprot)
82 
83 #define __pte(x)	((pte_t) { (x) } )
84 #define __iopte(x)	((iopte_t) { (x) } )
85 #define __pmd(x)        ((pmd_t) { (x) } )
86 #define __pud(x)        ((pud_t) { (x) } )
87 #define __pgd(x)	((pgd_t) { (x) } )
88 #define __pgprot(x)	((pgprot_t) { (x) } )
89 
90 #else
91 /* .. while these make it easier on the compiler */
92 typedef unsigned long pte_t;
93 typedef unsigned long iopte_t;
94 typedef unsigned long pmd_t;
95 typedef unsigned long pud_t;
96 typedef unsigned long pgd_t;
97 typedef unsigned long pgprot_t;
98 
99 #define pte_val(x)	(x)
100 #define iopte_val(x)	(x)
101 #define pmd_val(x)      (x)
102 #define pud_val(x)      (x)
103 #define pgd_val(x)	(x)
104 #define pgprot_val(x)	(x)
105 
106 #define __pte(x)	(x)
107 #define __iopte(x)	(x)
108 #define __pmd(x)        (x)
109 #define __pud(x)        (x)
110 #define __pgd(x)	(x)
111 #define __pgprot(x)	(x)
112 
113 #endif /* (STRICT_MM_TYPECHECKS) */
114 
115 typedef pte_t *pgtable_t;
116 
117 extern unsigned long sparc64_va_hole_top;
118 extern unsigned long sparc64_va_hole_bottom;
119 
120 /* The next two defines specify the actual exclusion region we
121  * enforce, wherein we use a 4GB red zone on each side of the VA hole.
122  */
123 #define VA_EXCLUDE_START (sparc64_va_hole_bottom - (1UL << 32UL))
124 #define VA_EXCLUDE_END   (sparc64_va_hole_top + (1UL << 32UL))
125 
126 #define TASK_UNMAPPED_BASE	(test_thread_flag(TIF_32BIT) ? \
127 				 _AC(0x0000000070000000,UL) : \
128 				 VA_EXCLUDE_END)
129 
130 #include <asm-generic/memory_model.h>
131 
132 extern unsigned long PAGE_OFFSET;
133 
134 #endif /* !(__ASSEMBLY__) */
135 
136 /* The maximum number of physical memory address bits we support.  The
137  * largest value we can support is whatever "KPGD_SHIFT + KPTE_BITS"
138  * evaluates to.
139  */
140 #define MAX_PHYS_ADDRESS_BITS	53
141 
142 #define ILOG2_4MB		22
143 #define ILOG2_256MB		28
144 
145 #ifndef __ASSEMBLY__
146 
147 #define __pa(x)			((unsigned long)(x) - PAGE_OFFSET)
148 #define __va(x)			((void *)((unsigned long) (x) + PAGE_OFFSET))
149 
150 #define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)
151 
152 #define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr)>>PAGE_SHIFT)
153 
154 #define virt_addr_valid(kaddr)	pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
155 
156 #define virt_to_phys __pa
157 #define phys_to_virt __va
158 
159 #endif /* !(__ASSEMBLY__) */
160 
161 #include <asm-generic/getorder.h>
162 
163 #endif /* _SPARC64_PAGE_H */
164