Don't require linux/auxvec.h, which isn't always installed with libc.
[qemu] / cache-utils.c
1 #include "cache-utils.h"
2
3 #ifdef __powerpc__
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 <sys/types.h>
41 #include <sys/sysctl.h>
42
43 static void ppc_init_cacheline_sizes(void)
44 {
45     size_t len;
46     unsigned cacheline;
47     int name[2] = { CTL_HW, HW_CACHELINE };
48
49     if (sysctl(name, 2, &cacheline, &len, NULL, 0)) {
50         perror("sysctl CTL_HW HW_CACHELINE failed");
51     } else {
52         qemu_cache_conf.dcache_bsize = cacheline;
53         qemu_cache_conf.icache_bsize = cacheline;
54     }
55 }
56 #endif
57
58 #ifdef __linux__
59 void qemu_cache_utils_init(char **envp)
60 {
61     ppc_init_cacheline_sizes(envp);
62 }
63 #else
64 void qemu_cache_utils_init(char **envp)
65 {
66     (void) envp;
67     ppc_init_cacheline_sizes();
68 }
69 #endif
70
71 #endif /* __powerpc__ */