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)
39struct pt_regs;
40void hugetlb_setup(struct pt_regs *regs);
41#endif
42
43#define WANT_PAGE_VIRTUAL
44
45void _clear_page(void *page);
46#define clear_page(X)	_clear_page((void *)(X))
47struct page;
48void clear_user_page(void *addr, unsigned long vaddr, struct page *page);
49#define copy_page(X,Y)	memcpy((void *)(X), (void *)(Y), PAGE_SIZE)
50void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *topage);
51#define __HAVE_ARCH_COPY_USER_HIGHPAGE
52struct vm_area_struct;
53void copy_user_highpage(struct page *to, struct page *from,
54			unsigned long vaddr, struct vm_area_struct *vma);
55#define __HAVE_ARCH_COPY_HIGHPAGE
56void 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.. */
69typedef struct { unsigned long pte; } pte_t;
70typedef struct { unsigned long iopte; } iopte_t;
71typedef struct { unsigned long pmd; } pmd_t;
72typedef struct { unsigned long pud; } pud_t;
73typedef struct { unsigned long pgd; } pgd_t;
74typedef 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 */
92typedef unsigned long pte_t;
93typedef unsigned long iopte_t;
94typedef unsigned long pmd_t;
95typedef unsigned long pud_t;
96typedef unsigned long pgd_t;
97typedef 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
115typedef pte_t *pgtable_t;
116
117extern unsigned long sparc64_va_hole_top;
118extern 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
132extern 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