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
|
/* libpaf-dsc hwcap testing.
*
* Copyright IBM Corp. 2013
*
* The MIT License (MIT)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* Contributors:
* IBM Corporation, Edjunior Barbosa Machado - Initial implementation.
*/
#include <dlfcn.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include <paf/dsc.h>
#include "paf-hwcap.h"
#include "config.h"
int
attribute_hidden
check_hwcap(void)
{
struct hwcap_t hwcap;
if (__paf_get_hwcap (&hwcap) != 0)
{
DEBUG ("Error reading hardware capabilities");
return 0;
}
/* check for DSCR support on AT_HWCAP2, if available */
if (hwcap.hwcap2 & PPC_FEATURE2_ARCH_2_07 &&
hwcap.hwcap2 & PPC_FEATURE2_HAS_DSCR)
{
DEBUG("ISA 2.07 (POWER8) and PPC_FEATURE2_HAS_DSCR found");
return DSCR_ISA_2_07_MASK;
}
/* check for ISA version based on AT_HWCAP */
if (hwcap.hwcap1 & PPC_FEATURE_ARCH_2_06)
{
/* verify if 'power7+' checking AT_BASE_PLATFORM */
if (!strcmp(hwcap.platform, "power7+"))
{
DEBUG("ISA 2.06+ (POWER7+) found");
return DSCR_ISA_2_06P_MASK;
}
DEBUG("ISA 2.06 (POWER7) found");
return DSCR_ISA_2_06_MASK;
}
else if (hwcap.hwcap1 & PPC_FEATURE_ARCH_2_05)
{
DEBUG("ISA 2.05 (POWER6) found");
return DSCR_ISA_2_05_MASK;
}
/* no support available for machines previous then ISA 2.05 */
DEBUG("POWER5 or older (no support available)");
return 0;
}
|
