6b13f685e
 김민수
BSP 최초 추가
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
/*
* Blackfin cache control code
*
* Copyright 2004-2008 Analog Devices Inc.
*
* Licensed under the GPL-2 or later.
*/
#include <linux/linkage.h>
#include <asm/blackfin.h>
#include <asm/cache.h>
#include <asm/page.h>
/* 05000443 - IFLUSH cannot be last instruction in hardware loop */
#if ANOMALY_05000443
# define BROK_FLUSH_INST "IFLUSH"
#else
# define BROK_FLUSH_INST "no anomaly! yeah!"
#endif
/* Since all L1 caches work the same way, we use the same method for flushing
* them. Only the actual flush instruction differs. We write this in asm as
* GCC can be hard to coax into writing nice hardware loops.
*
* Also, we assume the following register setup:
* R0 = start address
* R1 = end address
*/
.macro do_flush flushins:req label
R2 = -L1_CACHE_BYTES;
/* start = (start & -L1_CACHE_BYTES) */
R0 = R0 & R2;
/* end = ((end - 1) & -L1_CACHE_BYTES) + L1_CACHE_BYTES; */
R1 += -1;
R1 = R1 & R2;
R1 += L1_CACHE_BYTES;
/* count = (end - start) >> L1_CACHE_SHIFT */
R2 = R1 - R0;
R2 >>= L1_CACHE_SHIFT;
P1 = R2;
.ifnb \label
\label :
.endif
P0 = R0;
LSETUP (1f, 2f) LC1 = P1;
1:
.ifeqs "\flushins", BROK_FLUSH_INST
\flushins [P0++];
nop;
nop;
2: nop;
.else
2: \flushins [P0++];
.endif
RTS;
.endm
#ifdef CONFIG_ICACHE_FLUSH_L1
.section .l1.text
#else
.text
#endif
/* Invalidate all instruction cache lines assocoiated with this memory area */
#ifdef CONFIG_SMP
# define _blackfin_icache_flush_range _blackfin_icache_flush_range_l1
#endif
ENTRY(_blackfin_icache_flush_range)
do_flush IFLUSH
ENDPROC(_blackfin_icache_flush_range)
#ifdef CONFIG_SMP
.text
# undef _blackfin_icache_flush_range
ENTRY(_blackfin_icache_flush_range)
p0.L = LO(DSPID);
p0.H = HI(DSPID);
r3 = [p0];
r3 = r3.b (z);
p2 = r3;
p0.L = _blackfin_iflush_l1_entry;
p0.H = _blackfin_iflush_l1_entry;
p0 = p0 + (p2 << 2);
p1 = [p0];
jump (p1);
ENDPROC(_blackfin_icache_flush_range)
#endif
#ifdef CONFIG_DCACHE_FLUSH_L1
.section .l1.text
#else
.text
#endif
/* Throw away all D-cached data in specified region without any obligation to
* write them back. Since the Blackfin ISA does not have an "invalidate"
* instruction, we use flush/invalidate. Perhaps as a speed optimization we
* could bang on the DTEST MMRs ...
*/
ENTRY(_blackfin_dcache_invalidate_range)
do_flush FLUSHINV
ENDPROC(_blackfin_dcache_invalidate_range)
/* Flush all data cache lines assocoiated with this memory area */
ENTRY(_blackfin_dcache_flush_range)
do_flush FLUSH, .Ldfr
ENDPROC(_blackfin_dcache_flush_range)
/* Our headers convert the page structure to an address, so just need to flush
* its contents like normal. We know the start address is page aligned (which
* greater than our cache alignment), as is the end address. So just jump into
* the middle of the dcache flush function.
*/
ENTRY(_blackfin_dflush_page)
P1 = 1 << (PAGE_SHIFT - L1_CACHE_SHIFT);
jump .Ldfr;
ENDPROC(_blackfin_dflush_page)
|