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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/*
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}