2 * Cache management functions for Hexagon
4 * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
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.
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.
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
22 #include <asm/cacheflush.h>
23 #include <asm/hexagon_vm.h>
25 #define spanlines(start, end) \
26 (((end - (start & ~(LINESIZE - 1))) >> LINEBITS) + 1)
28 void flush_dcache_range(unsigned long start
, unsigned long end
)
30 unsigned long lines
= spanlines(start
, end
-1);
31 unsigned long i
, flags
;
33 start
&= ~(LINESIZE
- 1);
35 local_irq_save(flags
);
37 for (i
= 0; i
< lines
; i
++) {
38 __asm__
__volatile__ (
45 local_irq_restore(flags
);
48 void flush_icache_range(unsigned long start
, unsigned long end
)
50 unsigned long lines
= spanlines(start
, end
-1);
51 unsigned long i
, flags
;
53 start
&= ~(LINESIZE
- 1);
55 local_irq_save(flags
);
57 for (i
= 0; i
< lines
; i
++) {
58 __asm__
__volatile__ (
66 __asm__
__volatile__ (
69 local_irq_restore(flags
);
72 void hexagon_clean_dcache_range(unsigned long start
, unsigned long end
)
74 unsigned long lines
= spanlines(start
, end
-1);
75 unsigned long i
, flags
;
77 start
&= ~(LINESIZE
- 1);
79 local_irq_save(flags
);
81 for (i
= 0; i
< lines
; i
++) {
82 __asm__
__volatile__ (
89 local_irq_restore(flags
);
92 void hexagon_inv_dcache_range(unsigned long start
, unsigned long end
)
94 unsigned long lines
= spanlines(start
, end
-1);
95 unsigned long i
, flags
;
97 start
&= ~(LINESIZE
- 1);
99 local_irq_save(flags
);
101 for (i
= 0; i
< lines
; i
++) {
102 __asm__
__volatile__ (
109 local_irq_restore(flags
);
116 * This is just really brutal and shouldn't be used anyways,
117 * especially on V2. Left here just in case.
119 void flush_cache_all_hexagon(void)
122 local_irq_save(flags
);
126 local_irq_restore(flags
);