qemu/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 <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 #ifdef __linux__
  61 void qemu_cache_utils_init(char **envp)
  62 {
  63     ppc_init_cacheline_sizes(envp);
  64 }
  65 #else
  66 void qemu_cache_utils_init(char **envp)
  67 {
  68     (void) envp;
  69     ppc_init_cacheline_sizes();
  70 }
  71 #endif
  72
  73 #endif /* _ARCH_PPC */