]>
Commit | Line | Data |
---|---|---|
2d3cbc78 RK |
1 | /* |
2 | * Cache management functions for Hexagon | |
3 | * | |
e1858b2a | 4 | * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. |
2d3cbc78 RK |
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 | ||
28 | void 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 | ||
48 | void 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 | } | |
71 | ||
72 | void hexagon_clean_dcache_range(unsigned long start, unsigned long end) | |
73 | { | |
74 | unsigned long lines = spanlines(start, end-1); | |
75 | unsigned long i, flags; | |
76 | ||
77 | start &= ~(LINESIZE - 1); | |
78 | ||
79 | local_irq_save(flags); | |
80 | ||
81 | for (i = 0; i < lines; i++) { | |
82 | __asm__ __volatile__ ( | |
83 | " dccleana(%0); " | |
84 | : | |
85 | : "r" (start) | |
86 | ); | |
87 | start += LINESIZE; | |
88 | } | |
89 | local_irq_restore(flags); | |
90 | } | |
91 | ||
92 | void hexagon_inv_dcache_range(unsigned long start, unsigned long end) | |
93 | { | |
94 | unsigned long lines = spanlines(start, end-1); | |
95 | unsigned long i, flags; | |
96 | ||
97 | start &= ~(LINESIZE - 1); | |
98 | ||
99 | local_irq_save(flags); | |
100 | ||
101 | for (i = 0; i < lines; i++) { | |
102 | __asm__ __volatile__ ( | |
103 | " dcinva(%0); " | |
104 | : | |
105 | : "r" (start) | |
106 | ); | |
107 | start += LINESIZE; | |
108 | } | |
109 | local_irq_restore(flags); | |
110 | } | |
111 | ||
112 | ||
113 | ||
114 | ||
115 | /* | |
116 | * This is just really brutal and shouldn't be used anyways, | |
117 | * especially on V2. Left here just in case. | |
118 | */ | |
119 | void flush_cache_all_hexagon(void) | |
120 | { | |
121 | unsigned long flags; | |
122 | local_irq_save(flags); | |
123 | __vmcache_ickill(); | |
124 | __vmcache_dckill(); | |
125 | __vmcache_l2kill(); | |
126 | local_irq_restore(flags); | |
127 | mb(); | |
128 | } |