cache-utils.c

   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 <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 /* _ARCH_PPC */