util/cache-utils.c

   1 #include "qemu-common.h"
   2 #include "qemu/cache-utils.h"
   3
   4 #if defined(_ARCH_PPC)
   5 struct qemu_cache_conf qemu_cache_conf = {
   6     .dcache_bsize = 16,
   7     .icache_bsize = 16
   8 };
   9
  10 #if defined _AIX
  11 #include <sys/systemcfg.h>
  12
  13 void qemu_cache_utils_init(void)
  14 {
  15     qemu_cache_conf.icache_bsize = _system_configuration.icache_line;
  16     qemu_cache_conf.dcache_bsize = _system_configuration.dcache_line;
  17 }
  18
  19 #elif defined __linux__
  20 #include "qemu/osdep.h"
  21 #include "elf.h"
  22
  23 void qemu_cache_utils_init(void)
  24 {
  25     unsigned long dsize = qemu_getauxval(AT_DCACHEBSIZE);
  26     unsigned long isize = qemu_getauxval(AT_ICACHEBSIZE);
  27
  28     if (dsize == 0 || isize == 0) {
  29         if (dsize == 0) {
  30             fprintf(stderr, "getauxval AT_DCACHEBSIZE failed\n");
  31         }
  32         if (isize == 0) {
  33             fprintf(stderr, "getauxval AT_ICACHEBSIZE failed\n");
  34         }
  35         exit(1);
  36
  37     }
  38     qemu_cache_conf.dcache_bsize = dsize;
  39     qemu_cache_conf.icache_bsize = isize;
  40 }
  41
  42 #elif defined __APPLE__
  43 #include <stdio.h>
  44 #include <sys/types.h>
  45 #include <sys/sysctl.h>
  46
  47 void qemu_cache_utils_init(void)
  48 {
  49     size_t len;
  50     unsigned cacheline;
  51     int name[2] = { CTL_HW, HW_CACHELINE };
  52
  53     len = sizeof(cacheline);
  54     if (sysctl(name, 2, &cacheline, &len, NULL, 0)) {
  55         perror("sysctl CTL_HW HW_CACHELINE failed");
  56     } else {
  57         qemu_cache_conf.dcache_bsize = cacheline;
  58         qemu_cache_conf.icache_bsize = cacheline;
  59     }
  60 }
  61
  62 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
  63 #include <errno.h>
  64 #include <stdio.h>
  65 #include <stdlib.h>
  66 #include <string.h>
  67 #include <sys/types.h>
  68 #include <sys/sysctl.h>
  69
  70 void qemu_cache_utils_init(void)
  71 {
  72     size_t len = 4;
  73     unsigned cacheline;
  74
  75     if (sysctlbyname ("machdep.cacheline_size", &cacheline, &len, NULL, 0)) {
  76         fprintf(stderr, "sysctlbyname machdep.cacheline_size failed: %s\n",
  77                 strerror(errno));
  78         exit(1);
  79     }
  80
  81     qemu_cache_conf.dcache_bsize = cacheline;
  82     qemu_cache_conf.icache_bsize = cacheline;
  83 }
  84 #endif
  85
  86 #endif /* _ARCH_PPC */