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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
f5e706ad SR |
2 | /* |
3 | * page.h: Various defines and such for MMU operations on the Sparc for | |
4 | * the Linux kernel. | |
5 | * | |
6 | * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) | |
7 | */ | |
8 | ||
9 | #ifndef _SPARC_PAGE_H | |
10 | #define _SPARC_PAGE_H | |
11 | ||
a4b4f437 | 12 | #include <linux/const.h> |
5110bd21 | 13 | |
a4b4f437 SR |
14 | #define PAGE_SHIFT 12 |
15 | #define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT) | |
f5e706ad SR |
16 | #define PAGE_MASK (~(PAGE_SIZE-1)) |
17 | ||
f5e706ad SR |
18 | #ifndef __ASSEMBLY__ |
19 | ||
20 | #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) | |
21 | #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) | |
22 | #define clear_user_page(addr, vaddr, page) \ | |
23 | do { clear_page(addr); \ | |
24 | sparc_flush_page_to_ram(page); \ | |
25 | } while (0) | |
26 | #define copy_user_page(to, from, vaddr, page) \ | |
27 | do { copy_page(to, from); \ | |
28 | sparc_flush_page_to_ram(page); \ | |
29 | } while (0) | |
30 | ||
31 | /* The following structure is used to hold the physical | |
32 | * memory configuration of the machine. This is filled in | |
33 | * prom_meminit() and is later used by mem_init() to set up | |
34 | * mem_map[]. We statically allocate SPARC_PHYS_BANKS+1 of | |
35 | * these structs, this is arbitrary. The entry after the | |
36 | * last valid one has num_bytes==0. | |
37 | */ | |
38 | struct sparc_phys_banks { | |
39 | unsigned long base_addr; | |
40 | unsigned long num_bytes; | |
41 | }; | |
42 | ||
43 | #define SPARC_PHYS_BANKS 32 | |
44 | ||
45 | extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1]; | |
46 | ||
f5e706ad SR |
47 | /* passing structs on the Sparc slow us down tremendously... */ |
48 | ||
49 | /* #define STRICT_MM_TYPECHECKS */ | |
50 | ||
51 | #ifdef STRICT_MM_TYPECHECKS | |
52 | /* | |
53 | * These are used to make use of C type-checking.. | |
54 | */ | |
55 | typedef struct { unsigned long pte; } pte_t; | |
56 | typedef struct { unsigned long iopte; } iopte_t; | |
57 | typedef struct { unsigned long pmdv[16]; } pmd_t; | |
58 | typedef struct { unsigned long pgd; } pgd_t; | |
59 | typedef struct { unsigned long ctxd; } ctxd_t; | |
60 | typedef struct { unsigned long pgprot; } pgprot_t; | |
61 | typedef struct { unsigned long iopgprot; } iopgprot_t; | |
62 | ||
63 | #define pte_val(x) ((x).pte) | |
64 | #define iopte_val(x) ((x).iopte) | |
65 | #define pmd_val(x) ((x).pmdv[0]) | |
66 | #define pgd_val(x) ((x).pgd) | |
67 | #define ctxd_val(x) ((x).ctxd) | |
68 | #define pgprot_val(x) ((x).pgprot) | |
69 | #define iopgprot_val(x) ((x).iopgprot) | |
70 | ||
71 | #define __pte(x) ((pte_t) { (x) } ) | |
9157259d | 72 | #define __pmd(x) ((pmd_t) { { (x) }, }) |
f5e706ad | 73 | #define __iopte(x) ((iopte_t) { (x) } ) |
f5e706ad SR |
74 | #define __pgd(x) ((pgd_t) { (x) } ) |
75 | #define __ctxd(x) ((ctxd_t) { (x) } ) | |
76 | #define __pgprot(x) ((pgprot_t) { (x) } ) | |
77 | #define __iopgprot(x) ((iopgprot_t) { (x) } ) | |
78 | ||
79 | #else | |
80 | /* | |
81 | * .. while these make it easier on the compiler | |
82 | */ | |
83 | typedef unsigned long pte_t; | |
84 | typedef unsigned long iopte_t; | |
85 | typedef struct { unsigned long pmdv[16]; } pmd_t; | |
86 | typedef unsigned long pgd_t; | |
87 | typedef unsigned long ctxd_t; | |
88 | typedef unsigned long pgprot_t; | |
89 | typedef unsigned long iopgprot_t; | |
90 | ||
91 | #define pte_val(x) (x) | |
92 | #define iopte_val(x) (x) | |
93 | #define pmd_val(x) ((x).pmdv[0]) | |
94 | #define pgd_val(x) (x) | |
95 | #define ctxd_val(x) (x) | |
96 | #define pgprot_val(x) (x) | |
97 | #define iopgprot_val(x) (x) | |
98 | ||
99 | #define __pte(x) (x) | |
9157259d | 100 | #define __pmd(x) ((pmd_t) { { (x) }, }) |
f5e706ad | 101 | #define __iopte(x) (x) |
f5e706ad SR |
102 | #define __pgd(x) (x) |
103 | #define __ctxd(x) (x) | |
104 | #define __pgprot(x) (x) | |
105 | #define __iopgprot(x) (x) | |
106 | ||
107 | #endif | |
108 | ||
109 | typedef struct page *pgtable_t; | |
110 | ||
c966a337 | 111 | #define TASK_UNMAPPED_BASE 0x50000000 |
f5e706ad SR |
112 | |
113 | #else /* !(__ASSEMBLY__) */ | |
114 | ||
115 | #define __pgprot(x) (x) | |
116 | ||
117 | #endif /* !(__ASSEMBLY__) */ | |
118 | ||
f5e706ad SR |
119 | #define PAGE_OFFSET 0xf0000000 |
120 | #ifndef __ASSEMBLY__ | |
121 | extern unsigned long phys_base; | |
122 | extern unsigned long pfn_base; | |
123 | #endif | |
124 | #define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + phys_base) | |
125 | #define __va(x) ((void *)((unsigned long) (x) - phys_base + PAGE_OFFSET)) | |
126 | ||
127 | #define virt_to_phys __pa | |
128 | #define phys_to_virt __va | |
129 | ||
130 | #define ARCH_PFN_OFFSET (pfn_base) | |
8654164f | 131 | #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) |
f5e706ad SR |
132 | |
133 | #define pfn_valid(pfn) (((pfn) >= (pfn_base)) && (((pfn)-(pfn_base)) < max_mapnr)) | |
134 | #define virt_addr_valid(kaddr) ((((unsigned long)(kaddr)-PAGE_OFFSET)>>PAGE_SHIFT) < max_mapnr) | |
135 | ||
136 | #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ | |
137 | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) | |
138 | ||
139 | #include <asm-generic/memory_model.h> | |
5b17e1cd | 140 | #include <asm-generic/getorder.h> |
f5e706ad SR |
141 | |
142 | #endif /* _SPARC_PAGE_H */ |