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100644 98 lines (80 sloc) 2.199 kb
68396ea @rmustacc Initial commit of d32e8d0b8d9e0ef7cf7ab2e74548982972789dfc from qemu-kvm
rmustacc authored
1 #include "cache-utils.h"
2
3 #if defined(_ARCH_PPC)
4 struct qemu_cache_conf qemu_cache_conf = {
5 .dcache_bsize = 16,
6 .icache_bsize = 16
7 };
8
9 #if defined _AIX
10 #include <sys/systemcfg.h>
11
12 static void ppc_init_cacheline_sizes(void)
13 {
14 qemu_cache_conf.icache_bsize = _system_configuration.icache_line;
15 qemu_cache_conf.dcache_bsize = _system_configuration.dcache_line;
16 }
17
18 #elif defined __linux__
19
20 #define QEMU_AT_NULL 0
21 #define QEMU_AT_DCACHEBSIZE 19
22 #define QEMU_AT_ICACHEBSIZE 20
23
24 static void ppc_init_cacheline_sizes(char **envp)
25 {
26 unsigned long *auxv;
27
28 while (*envp++);
29
30 for (auxv = (unsigned long *) envp; *auxv != QEMU_AT_NULL; auxv += 2) {
31 switch (*auxv) {
32 case QEMU_AT_DCACHEBSIZE: qemu_cache_conf.dcache_bsize = auxv[1]; break;
33 case QEMU_AT_ICACHEBSIZE: qemu_cache_conf.icache_bsize = auxv[1]; break;
34 default: break;
35 }
36 }
37 }
38
39 #elif defined __APPLE__
40 #include <stdio.h>
41 #include <sys/types.h>
42 #include <sys/sysctl.h>
43
44 static void ppc_init_cacheline_sizes(void)
45 {
46 size_t len;
47 unsigned cacheline;
48 int name[2] = { CTL_HW, HW_CACHELINE };
49
50 len = sizeof(cacheline);
51 if (sysctl(name, 2, &cacheline, &len, NULL, 0)) {
52 perror("sysctl CTL_HW HW_CACHELINE failed");
53 } else {
54 qemu_cache_conf.dcache_bsize = cacheline;
55 qemu_cache_conf.icache_bsize = cacheline;
56 }
57 }
58 #endif
59
60 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
61 #include <errno.h>
62 #include <stdio.h>
63 #include <stdlib.h>
64 #include <string.h>
65 #include <sys/types.h>
66 #include <sys/sysctl.h>
67
68 static void ppc_init_cacheline_sizes(void)
69 {
70 size_t len = 4;
71 unsigned cacheline;
72
73 if (sysctlbyname ("machdep.cacheline_size", &cacheline, &len, NULL, 0)) {
74 fprintf(stderr, "sysctlbyname machdep.cacheline_size failed: %s\n",
75 strerror(errno));
76 exit(1);
77 }
78
79 qemu_cache_conf.dcache_bsize = cacheline;
80 qemu_cache_conf.icache_bsize = cacheline;
81 }
82 #endif
83
84 #ifdef __linux__
85 void qemu_cache_utils_init(char **envp)
86 {
87 ppc_init_cacheline_sizes(envp);
88 }
89 #else
90 void qemu_cache_utils_init(char **envp)
91 {
92 (void) envp;
93 ppc_init_cacheline_sizes();
94 }
95 #endif
96
97 #endif /* _ARCH_PPC */
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