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1/* SPDX-License-Identifier: GPL-2.0 */
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
12#include <linux/const.h>
13
14#define PAGE_SHIFT 12
15#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
16#define PAGE_MASK (~(PAGE_SIZE-1))
17
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 */
38struct sparc_phys_banks {
39 unsigned long base_addr;
40 unsigned long num_bytes;
41};
42
43#define SPARC_PHYS_BANKS 32
44
45extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1];
46
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 */
55typedef struct { unsigned long pte; } pte_t;
56typedef struct { unsigned long iopte; } iopte_t;
57typedef struct { unsigned long pmd; } pmd_t;
58typedef struct { unsigned long pgd; } pgd_t;
59typedef struct { unsigned long ctxd; } ctxd_t;
60typedef struct { unsigned long pgprot; } pgprot_t;
61typedef 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).pmd)
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) } )
72#define __pmd(x) ((pmd_t) { { (x) }, })
73#define __iopte(x) ((iopte_t) { (x) } )
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 */
83typedef unsigned long pte_t;
84typedef unsigned long iopte_t;
85typedef unsigned long pmd_t;
86typedef unsigned long pgd_t;
87typedef unsigned long ctxd_t;
88typedef unsigned long pgprot_t;
89typedef unsigned long iopgprot_t;
90
91#define pte_val(x) (x)
92#define iopte_val(x) (x)
93#define pmd_val(x) (x)
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)
100#define __pmd(x) (x)
101#define __iopte(x) (x)
102#define __pgd(x) (x)
103#define __ctxd(x) (x)
104#define __pgprot(x) (x)
105#define __iopgprot(x) (x)
106
107#endif
108
109typedef pte_t *pgtable_t;
110
111#define TASK_UNMAPPED_BASE 0x50000000
112
113#else /* !(__ASSEMBLY__) */
114
115#define __pgprot(x) (x)
116
117#endif /* !(__ASSEMBLY__) */
118
119#define PAGE_OFFSET 0xf0000000
120#ifndef __ASSEMBLY__
121extern unsigned long phys_base;
122extern 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)
131#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
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#include <asm-generic/memory_model.h>
137#include <asm-generic/getorder.h>
138
139#endif /* _SPARC_PAGE_H */
1/* SPDX-License-Identifier: GPL-2.0 */
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
12#include <linux/const.h>
13
14#define PAGE_SHIFT 12
15#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
16#define PAGE_MASK (~(PAGE_SIZE-1))
17
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 */
38struct sparc_phys_banks {
39 unsigned long base_addr;
40 unsigned long num_bytes;
41};
42
43#define SPARC_PHYS_BANKS 32
44
45extern struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1];
46
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 */
55typedef struct { unsigned long pte; } pte_t;
56typedef struct { unsigned long iopte; } iopte_t;
57typedef struct { unsigned long pmdv[16]; } pmd_t;
58typedef struct { unsigned long pgd; } pgd_t;
59typedef struct { unsigned long ctxd; } ctxd_t;
60typedef struct { unsigned long pgprot; } pgprot_t;
61typedef 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) } )
72#define __pmd(x) ((pmd_t) { { (x) }, })
73#define __iopte(x) ((iopte_t) { (x) } )
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 */
83typedef unsigned long pte_t;
84typedef unsigned long iopte_t;
85typedef struct { unsigned long pmdv[16]; } pmd_t;
86typedef unsigned long pgd_t;
87typedef unsigned long ctxd_t;
88typedef unsigned long pgprot_t;
89typedef 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)
100#define __pmd(x) ((pmd_t) { { (x) }, })
101#define __iopte(x) (x)
102#define __pgd(x) (x)
103#define __ctxd(x) (x)
104#define __pgprot(x) (x)
105#define __iopgprot(x) (x)
106
107#endif
108
109typedef struct page *pgtable_t;
110
111#define TASK_UNMAPPED_BASE 0x50000000
112
113#else /* !(__ASSEMBLY__) */
114
115#define __pgprot(x) (x)
116
117#endif /* !(__ASSEMBLY__) */
118
119#define PAGE_OFFSET 0xf0000000
120#ifndef __ASSEMBLY__
121extern unsigned long phys_base;
122extern 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)
131#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
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>
140#include <asm-generic/getorder.h>
141
142#endif /* _SPARC_PAGE_H */