aboutsummaryrefslogtreecommitdiff
path: root/cache-utils.c
blob: b94013a8cb921cb4d90a5c007c74e243a42f8146 (plain)
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
#include "qemu/cache-utils.h"

#if defined(_ARCH_PPC)
struct qemu_cache_conf qemu_cache_conf = {
    .dcache_bsize = 16,
    .icache_bsize = 16
};

#if defined _AIX
#include <sys/systemcfg.h>

static void ppc_init_cacheline_sizes(void)
{
    qemu_cache_conf.icache_bsize = _system_configuration.icache_line;
    qemu_cache_conf.dcache_bsize = _system_configuration.dcache_line;
}

#elif defined __linux__

#define QEMU_AT_NULL        0
#define QEMU_AT_DCACHEBSIZE 19
#define QEMU_AT_ICACHEBSIZE 20

static void ppc_init_cacheline_sizes(char **envp)
{
    unsigned long *auxv;

    while (*envp++);

    for (auxv = (unsigned long *) envp; *auxv != QEMU_AT_NULL; auxv += 2) {
        switch (*auxv) {
        case QEMU_AT_DCACHEBSIZE: qemu_cache_conf.dcache_bsize = auxv[1]; break;
        case QEMU_AT_ICACHEBSIZE: qemu_cache_conf.icache_bsize = auxv[1]; break;
        default: break;
        }
    }
}

#elif defined __APPLE__
#include <stdio.h>
#include <sys/types.h>
#include <sys/sysctl.h>

static void ppc_init_cacheline_sizes(void)
{
    size_t len;
    unsigned cacheline;
    int name[2] = { CTL_HW, HW_CACHELINE };

    len = sizeof(cacheline);
    if (sysctl(name, 2, &cacheline, &len, NULL, 0)) {
        perror("sysctl CTL_HW HW_CACHELINE failed");
    } else {
        qemu_cache_conf.dcache_bsize = cacheline;
        qemu_cache_conf.icache_bsize = cacheline;
    }
}
#endif

#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/sysctl.h>

static void ppc_init_cacheline_sizes(void)
{
    size_t len = 4;
    unsigned cacheline;

    if (sysctlbyname ("machdep.cacheline_size", &cacheline, &len, NULL, 0)) {
        fprintf(stderr, "sysctlbyname machdep.cacheline_size failed: %s\n",
                strerror(errno));
        exit(1);
    }

    qemu_cache_conf.dcache_bsize = cacheline;
    qemu_cache_conf.icache_bsize = cacheline;
}
#endif

#ifdef __linux__
void qemu_cache_utils_init(char **envp)
{
    ppc_init_cacheline_sizes(envp);
}
#else
void qemu_cache_utils_init(char **envp)
{
    (void) envp;
    ppc_init_cacheline_sizes();
}
#endif

#endif /* _ARCH_PPC */