1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Cache management functions for Hexagon
4 *
5 * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
6 */
7
8 #include <linux/mm.h>
9 #include <asm/cacheflush.h>
10 #include <asm/hexagon_vm.h>
11
12 #define spanlines(start, end) \
13 (((end - (start & ~(LINESIZE - 1))) >> LINEBITS) + 1)
14
15 void flush_dcache_range(unsigned long start, unsigned long end)
16 {
17 unsigned long lines = spanlines(start, end-1);
18 unsigned long i, flags;
19
20 start &= ~(LINESIZE - 1);
21
22 local_irq_save(flags);
23
24 for (i = 0; i < lines; i++) {
25 __asm__ __volatile__ (
26 " dccleaninva(%0); "
27 :
28 : "r" (start)
29 );
30 start += LINESIZE;
31 }
32 local_irq_restore(flags);
33 }
34
35 void flush_icache_range(unsigned long start, unsigned long end)
36 {
37 unsigned long lines = spanlines(start, end-1);
38 unsigned long i, flags;
39
40 start &= ~(LINESIZE - 1);
41
42 local_irq_save(flags);
43
44 for (i = 0; i < lines; i++) {
45 __asm__ __volatile__ (
46 " dccleana(%0); "
47 " icinva(%0); "
48 :
49 : "r" (start)
50 );
51 start += LINESIZE;
52 }
53 __asm__ __volatile__ (
54 "isync"
55 );
56 local_irq_restore(flags);
57 }
58 EXPORT_SYMBOL(flush_icache_range);
59
60 void hexagon_clean_dcache_range(unsigned long start, unsigned long end)
61 {
62 unsigned long lines = spanlines(start, end-1);
63 unsigned long i, flags;
64
65 start &= ~(LINESIZE - 1);
66
67 local_irq_save(flags);
68
69 for (i = 0; i < lines; i++) {
70 __asm__ __volatile__ (
71 " dccleana(%0); "
72 :
73 : "r" (start)
74 );
75 start += LINESIZE;
76 }
77 local_irq_restore(flags);
78 }
79
80 void hexagon_inv_dcache_range(unsigned long start, unsigned long end)
81 {
82 unsigned long lines = spanlines(start, end-1);
83 unsigned long i, flags;
84
85 start &= ~(LINESIZE - 1);
86
87 local_irq_save(flags);
88
89 for (i = 0; i < lines; i++) {
90 __asm__ __volatile__ (
91 " dcinva(%0); "
92 :
93 : "r" (start)
94 );
95 start += LINESIZE;
96 }
97 local_irq_restore(flags);
98 }
99
100
101
102
103 /*
104 * This is just really brutal and shouldn't be used anyways,
105 * especially on V2. Left here just in case.
106 */
107 void flush_cache_all_hexagon(void)
108 {
109 unsigned long flags;
110 local_irq_save(flags);
111 __vmcache_ickill();
112 __vmcache_dckill();
113 __vmcache_l2kill();
114 local_irq_restore(flags);
115 mb();
116 }
117
118 void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
119 unsigned long vaddr, void *dst, void *src, int len)
120 {
121 memcpy(dst, src, len);
122 if (vma->vm_flags & VM_EXEC) {
123 flush_icache_range((unsigned long) dst,
124 (unsigned long) dst + len);
125 }
126 }
127
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