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 #include <linux/auxvec.h>
  20
  21 static void ppc_init_cacheline_sizes(char **envp)
  22 {
  23     unsigned long *auxv;
  24
  25     while (*envp++);
  26
  27     for (auxv = (unsigned long *) envp; *auxv != AT_NULL; auxv += 2) {
  28         switch (*auxv) {
  29         case AT_DCACHEBSIZE: qemu_cache_conf.dcache_bsize = auxv[1]; break;
  30         case AT_ICACHEBSIZE: qemu_cache_conf.icache_bsize = auxv[1]; break;
  31         default: break;
  32         }
  33     }
  34 }
  35
  36 #elif defined __APPLE__
  37 #include <sys/types.h>
  38 #include <sys/sysctl.h>
  39
  40 static void ppc_init_cacheline_sizes(void)
  41 {
  42     size_t len;
  43     unsigned cacheline;
  44     int name[2] = { CTL_HW, HW_CACHELINE };
  45
  46     if (sysctl(name, 2, &cacheline, &len, NULL, 0)) {
  47         perror("sysctl CTL_HW HW_CACHELINE failed");
  48     } else {
  49         qemu_cache_conf.dcache_bsize = cacheline;
  50         qemu_cache_conf.icache_bsize = cacheline;
  51     }
  52 }
  53 #endif
  54
  55 #ifdef __linux__
  56 void qemu_cache_utils_init(char **envp)
  57 {
  58     ppc_init_cacheline_sizes(envp);
  59 }
  60 #else
  61 void qemu_cache_utils_init(char **envp)
  62 {
  63     (void) envp;
  64     ppc_init_cacheline_sizes();
  65 }
  66 #endif
  67
  68 #endif /* __powerpc__ */