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
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
/*
* gcmain.c
*
* Copyright (C) 2010-2011 Vivante Corporation.
*
* This package is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#include <plat/cpu.h>
#include "gcmain.h"
/*******************************************************************************
* BLTsville interface exposure.
*/
static struct bventry ops = {
.structsize = sizeof(struct bventry),
};
static void gcbv_clear(void)
{
ops.bv_map = NULL;
ops.bv_unmap = NULL;
ops.bv_blt = NULL;
ops.bv_cache = NULL;
}
static void gcbv_assign(void)
{
ops.bv_map = bv_map;
ops.bv_unmap = bv_unmap;
ops.bv_blt = bv_blt;
ops.bv_cache = bv_cache;
}
void gcbv_init(struct bventry *entry)
{
*entry = ops;
}
EXPORT_SYMBOL(gcbv_init);
/*******************************************************************************
* Convert floating point in 0..1 range to an 8-bit value in range 0..255.
*/
union gcfp {
struct {
unsigned int mantissa:23;
unsigned int exponent:8;
unsigned int sign:1;
} comp;
float value;
};
unsigned char gcfp2norm8(float value)
{
union gcfp gcfp;
int exponent;
unsigned int mantissa;
int shift;
/* Get access to components. */
gcfp.value = value;
/* Clamp negatives. */
if (gcfp.comp.sign)
return 0;
/* Get unbiased exponent. */
exponent = (int) gcfp.comp.exponent - 127;
/* Clamp if too large. */
if (exponent >= 0)
return 255;
/* Clamp if too small. */
if (exponent < -8)
return 0;
/* Determine the shift value. */
shift = (23 - 8) - exponent;
/* Compute the mantissa. */
mantissa = (gcfp.comp.mantissa | 0x00800000) >> shift;
/* Normalize. */
mantissa = (mantissa * 255) >> 8;
return (unsigned char) mantissa;
}
/*******************************************************************************
* Cache operation wrapper.
*/
enum bverror gcbvcacheop(int count, struct c2dmrgn rgn[],
enum bvcacheop cacheop)
{
enum bverror err = BVERR_NONE;
switch (cacheop) {
case DMA_FROM_DEVICE:
c2dm_l2cache(count, rgn, cacheop);
c2dm_l1cache(count, rgn, cacheop);
break;
case DMA_TO_DEVICE:
c2dm_l1cache(count, rgn, cacheop);
c2dm_l2cache(count, rgn, cacheop);
break;
case DMA_BIDIRECTIONAL:
c2dm_l1cache(count, rgn, cacheop);
c2dm_l2cache(count, rgn, cacheop);
break;
default:
err = BVERR_CACHEOP;
break;
}
return err;
}
/*******************************************************************************
* Device init/cleanup.
*/
static int __init mod_init(void)
{
bv_init();
/* Assign BV function parameters only if SoC contains a GC core */
if (cpu_is_omap447x())
gcbv_assign();
return 0;
}
static void __exit mod_exit(void)
{
gcbv_clear();
bv_exit();
}
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("www.vivantecorp.com");
MODULE_AUTHOR("www.ti.com");
module_init(mod_init);
module_exit(mod_exit);
|
