Loading...
1/*
2 * Cache management functions for Hexagon
3 *
4 * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 and
8 * only version 2 as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
18 * 02110-1301, USA.
19 */
20
21#include <linux/mm.h>
22#include <asm/cacheflush.h>
23#include <asm/hexagon_vm.h>
24
25#define spanlines(start, end) \
26 (((end - (start & ~(LINESIZE - 1))) >> LINEBITS) + 1)
27
28void flush_dcache_range(unsigned long start, unsigned long end)
29{
30 unsigned long lines = spanlines(start, end-1);
31 unsigned long i, flags;
32
33 start &= ~(LINESIZE - 1);
34
35 local_irq_save(flags);
36
37 for (i = 0; i < lines; i++) {
38 __asm__ __volatile__ (
39 " dccleaninva(%0); "
40 :
41 : "r" (start)
42 );
43 start += LINESIZE;
44 }
45 local_irq_restore(flags);
46}
47
48void flush_icache_range(unsigned long start, unsigned long end)
49{
50 unsigned long lines = spanlines(start, end-1);
51 unsigned long i, flags;
52
53 start &= ~(LINESIZE - 1);
54
55 local_irq_save(flags);
56
57 for (i = 0; i < lines; i++) {
58 __asm__ __volatile__ (
59 " dccleana(%0); "
60 " icinva(%0); "
61 :
62 : "r" (start)
63 );
64 start += LINESIZE;
65 }
66 __asm__ __volatile__ (
67 "isync"
68 );
69 local_irq_restore(flags);
70}
71EXPORT_SYMBOL(flush_icache_range);
72
73void hexagon_clean_dcache_range(unsigned long start, unsigned long end)
74{
75 unsigned long lines = spanlines(start, end-1);
76 unsigned long i, flags;
77
78 start &= ~(LINESIZE - 1);
79
80 local_irq_save(flags);
81
82 for (i = 0; i < lines; i++) {
83 __asm__ __volatile__ (
84 " dccleana(%0); "
85 :
86 : "r" (start)
87 );
88 start += LINESIZE;
89 }
90 local_irq_restore(flags);
91}
92
93void hexagon_inv_dcache_range(unsigned long start, unsigned long end)
94{
95 unsigned long lines = spanlines(start, end-1);
96 unsigned long i, flags;
97
98 start &= ~(LINESIZE - 1);
99
100 local_irq_save(flags);
101
102 for (i = 0; i < lines; i++) {
103 __asm__ __volatile__ (
104 " dcinva(%0); "
105 :
106 : "r" (start)
107 );
108 start += LINESIZE;
109 }
110 local_irq_restore(flags);
111}
112
113
114
115
116/*
117 * This is just really brutal and shouldn't be used anyways,
118 * especially on V2. Left here just in case.
119 */
120void flush_cache_all_hexagon(void)
121{
122 unsigned long flags;
123 local_irq_save(flags);
124 __vmcache_ickill();
125 __vmcache_dckill();
126 __vmcache_l2kill();
127 local_irq_restore(flags);
128 mb();
129}
130
131void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
132 unsigned long vaddr, void *dst, void *src, int len)
133{
134 memcpy(dst, src, len);
135 if (vma->vm_flags & VM_EXEC) {
136 flush_icache_range((unsigned long) dst,
137 (unsigned long) dst + len);
138 }
139}
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
15void 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
35void 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}
58EXPORT_SYMBOL(flush_icache_range);
59
60void 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
80void 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 */
107void 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
118void 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}