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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _M68K_PAGE_MM_H
3#define _M68K_PAGE_MM_H
4
5#ifndef __ASSEMBLY__
6
7#include <linux/compiler.h>
8#include <asm/module.h>
9
10/*
11 * We don't need to check for alignment etc.
12 */
13#ifdef CPU_M68040_OR_M68060_ONLY
14static inline void copy_page(void *to, void *from)
15{
16 unsigned long tmp;
17
18 __asm__ __volatile__("1:\t"
19 ".chip 68040\n\t"
20 "move16 %1@+,%0@+\n\t"
21 "move16 %1@+,%0@+\n\t"
22 ".chip 68k\n\t"
23 "dbra %2,1b\n\t"
24 : "=a" (to), "=a" (from), "=d" (tmp)
25 : "0" (to), "1" (from), "2" (PAGE_SIZE / 32 - 1));
26}
27
28static inline void clear_page(void *page)
29{
30 unsigned long tmp;
31 unsigned long *sp = page;
32
33 *sp++ = 0;
34 *sp++ = 0;
35 *sp++ = 0;
36 *sp++ = 0;
37
38 __asm__ __volatile__("1:\t"
39 ".chip 68040\n\t"
40 "move16 %2@+,%0@+\n\t"
41 ".chip 68k\n\t"
42 "subqw #8,%2\n\t"
43 "subqw #8,%2\n\t"
44 "dbra %1,1b\n\t"
45 : "=a" (sp), "=d" (tmp)
46 : "a" (page), "0" (sp),
47 "1" ((PAGE_SIZE - 16) / 16 - 1));
48}
49
50#else
51#define clear_page(page) memset((page), 0, PAGE_SIZE)
52#define copy_page(to,from) memcpy((to), (from), PAGE_SIZE)
53#endif
54
55#define clear_user_page(addr, vaddr, page) \
56 do { clear_page(addr); \
57 flush_dcache_page(page); \
58 } while (0)
59#define copy_user_page(to, from, vaddr, page) \
60 do { copy_page(to, from); \
61 flush_dcache_page(page); \
62 } while (0)
63
64extern unsigned long m68k_memoffset;
65
66#ifndef CONFIG_SUN3
67
68#define WANT_PAGE_VIRTUAL
69
70static inline unsigned long ___pa(void *vaddr)
71{
72 unsigned long paddr;
73 asm (
74 "1: addl #0,%0\n"
75 m68k_fixup(%c2, 1b+2)
76 : "=r" (paddr)
77 : "0" (vaddr), "i" (m68k_fixup_memoffset));
78 return paddr;
79}
80#define __pa(vaddr) ___pa((void *)(long)(vaddr))
81static inline void *__va(unsigned long paddr)
82{
83 void *vaddr;
84 asm (
85 "1: subl #0,%0\n"
86 m68k_fixup(%c2, 1b+2)
87 : "=r" (vaddr)
88 : "0" (paddr), "i" (m68k_fixup_memoffset));
89 return vaddr;
90}
91
92#else /* !CONFIG_SUN3 */
93/* This #define is a horrible hack to suppress lots of warnings. --m */
94#define __pa(x) ___pa((unsigned long)(x))
95static inline unsigned long ___pa(unsigned long x)
96{
97 if (x == 0)
98 return 0;
99 if (x >= PAGE_OFFSET)
100 return (x - PAGE_OFFSET);
101 else
102 return (x + 0x2000000);
103}
104
105static inline void *__va(unsigned long x)
106{
107 if (x == 0)
108 return (void *)0;
109
110 if (x < 0x2000000)
111 return (void *)(x + PAGE_OFFSET);
112 else
113 return (void *)(x - 0x2000000);
114}
115#endif /* CONFIG_SUN3 */
116
117/*
118 * NOTE: virtual isn't really correct, actually it should be the offset into the
119 * memory node, but we have no highmem, so that works for now.
120 * TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots
121 * of the shifts unnecessary.
122 */
123static inline unsigned long virt_to_pfn(const void *kaddr)
124{
125 return __pa(kaddr) >> PAGE_SHIFT;
126}
127
128static inline void *pfn_to_virt(unsigned long pfn)
129{
130 return __va(pfn << PAGE_SHIFT);
131}
132
133extern int m68k_virt_to_node_shift;
134
135#define virt_to_page(addr) ({ \
136 pfn_to_page(virt_to_pfn(addr)); \
137})
138#define page_to_virt(page) ({ \
139 pfn_to_virt(page_to_pfn(page)); \
140})
141
142#define ARCH_PFN_OFFSET (m68k_memory[0].addr >> PAGE_SHIFT)
143
144#define virt_addr_valid(kaddr) ((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory)
145#define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn))
146
147#endif /* __ASSEMBLY__ */
148
149#endif /* _M68K_PAGE_MM_H */
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _M68K_PAGE_MM_H
3#define _M68K_PAGE_MM_H
4
5#ifndef __ASSEMBLY__
6
7#include <linux/compiler.h>
8#include <asm/module.h>
9
10/*
11 * We don't need to check for alignment etc.
12 */
13#ifdef CPU_M68040_OR_M68060_ONLY
14static inline void copy_page(void *to, void *from)
15{
16 unsigned long tmp;
17
18 __asm__ __volatile__("1:\t"
19 ".chip 68040\n\t"
20 "move16 %1@+,%0@+\n\t"
21 "move16 %1@+,%0@+\n\t"
22 ".chip 68k\n\t"
23 "dbra %2,1b\n\t"
24 : "=a" (to), "=a" (from), "=d" (tmp)
25 : "0" (to), "1" (from) , "2" (PAGE_SIZE / 32 - 1)
26 );
27}
28
29static inline void clear_page(void *page)
30{
31 unsigned long tmp;
32 unsigned long *sp = page;
33
34 *sp++ = 0;
35 *sp++ = 0;
36 *sp++ = 0;
37 *sp++ = 0;
38
39 __asm__ __volatile__("1:\t"
40 ".chip 68040\n\t"
41 "move16 %2@+,%0@+\n\t"
42 ".chip 68k\n\t"
43 "subqw #8,%2\n\t"
44 "subqw #8,%2\n\t"
45 "dbra %1,1b\n\t"
46 : "=a" (sp), "=d" (tmp)
47 : "a" (page), "0" (sp),
48 "1" ((PAGE_SIZE - 16) / 16 - 1));
49}
50
51#else
52#define clear_page(page) memset((page), 0, PAGE_SIZE)
53#define copy_page(to,from) memcpy((to), (from), PAGE_SIZE)
54#endif
55
56#define clear_user_page(addr, vaddr, page) \
57 do { clear_page(addr); \
58 flush_dcache_page(page); \
59 } while (0)
60#define copy_user_page(to, from, vaddr, page) \
61 do { copy_page(to, from); \
62 flush_dcache_page(page); \
63 } while (0)
64
65extern unsigned long m68k_memoffset;
66
67#ifndef CONFIG_SUN3
68
69#define WANT_PAGE_VIRTUAL
70
71static inline unsigned long ___pa(void *vaddr)
72{
73 unsigned long paddr;
74 asm (
75 "1: addl #0,%0\n"
76 m68k_fixup(%c2, 1b+2)
77 : "=r" (paddr)
78 : "0" (vaddr), "i" (m68k_fixup_memoffset));
79 return paddr;
80}
81#define __pa(vaddr) ___pa((void *)(long)(vaddr))
82static inline void *__va(unsigned long paddr)
83{
84 void *vaddr;
85 asm (
86 "1: subl #0,%0\n"
87 m68k_fixup(%c2, 1b+2)
88 : "=r" (vaddr)
89 : "0" (paddr), "i" (m68k_fixup_memoffset));
90 return vaddr;
91}
92
93#else /* !CONFIG_SUN3 */
94/* This #define is a horrible hack to suppress lots of warnings. --m */
95#define __pa(x) ___pa((unsigned long)(x))
96static inline unsigned long ___pa(unsigned long x)
97{
98 if(x == 0)
99 return 0;
100 if(x >= PAGE_OFFSET)
101 return (x-PAGE_OFFSET);
102 else
103 return (x+0x2000000);
104}
105
106static inline void *__va(unsigned long x)
107{
108 if(x == 0)
109 return (void *)0;
110
111 if(x < 0x2000000)
112 return (void *)(x+PAGE_OFFSET);
113 else
114 return (void *)(x-0x2000000);
115}
116#endif /* CONFIG_SUN3 */
117
118/*
119 * NOTE: virtual isn't really correct, actually it should be the offset into the
120 * memory node, but we have no highmem, so that works for now.
121 * TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots
122 * of the shifts unnecessary.
123 */
124#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
125#define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
126
127extern int m68k_virt_to_node_shift;
128
129#define virt_to_page(addr) ({ \
130 pfn_to_page(virt_to_pfn(addr)); \
131})
132#define page_to_virt(page) ({ \
133 pfn_to_virt(page_to_pfn(page)); \
134})
135
136#define ARCH_PFN_OFFSET (m68k_memory[0].addr >> PAGE_SHIFT)
137#include <asm-generic/memory_model.h>
138
139#define virt_addr_valid(kaddr) ((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory)
140#define pfn_valid(pfn) virt_addr_valid(pfn_to_virt(pfn))
141
142#endif /* __ASSEMBLY__ */
143
144#endif /* _M68K_PAGE_MM_H */