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)
38struct pt_regs;
39void hugetlb_setup(struct pt_regs *regs);
40#endif
41
42#define WANT_PAGE_VIRTUAL
43
44void _clear_page(void *page);
45#define clear_page(X)	_clear_page((void *)(X))
46struct page;
47void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
48#define copy_page(X,Y)	memcpy((void *)(X), (void *)(Y), PAGE_SIZE)
49void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage);
50#define __HAVE_ARCH_COPY_USER_HIGHPAGE
51struct vm_area_struct;
52void copy_user_highpage(struct page *to, struct page *from,
53			unsigned long vaddr, struct vm_area_struct *vma);
54#define __HAVE_ARCH_COPY_HIGHPAGE
55void 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.. */
68typedef struct { unsigned long pte; } pte_t;
69typedef struct { unsigned long iopte; } iopte_t;
70typedef struct { unsigned long pmd; } pmd_t;
71typedef struct { unsigned long pud; } pud_t;
72typedef struct { unsigned long pgd; } pgd_t;
73typedef 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 */
91typedef unsigned long pte_t;
92typedef unsigned long iopte_t;
93typedef unsigned long pmd_t;
94typedef unsigned long pud_t;
95typedef unsigned long pgd_t;
96typedef 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
114typedef pte_t *pgtable_t;
115
116extern unsigned long sparc64_va_hole_top;
117extern 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
131extern 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