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