cache-utils.c

   1 #include <stdint.h>
   2 #include "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 static void ppc_init_cacheline_sizes(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
  21 #define QEMU_AT_NULL        0
  22 #define QEMU_AT_DCACHEBSIZE 19
  23 #define QEMU_AT_ICACHEBSIZE 20
  24
  25 static void ppc_init_cacheline_sizes(char **envp)
  26 {
  27     unsigned long *auxv;
  28
  29     while (*envp++);
  30
  31     for (auxv = (unsigned long *) envp; *auxv != QEMU_AT_NULL; auxv += 2) {
  32         switch (*auxv) {
  33         case QEMU_AT_DCACHEBSIZE: qemu_cache_conf.dcache_bsize = auxv[1]; break;
  34         case QEMU_AT_ICACHEBSIZE: qemu_cache_conf.icache_bsize = auxv[1]; break;
  35         default: break;
  36         }
  37     }
  38 }
  39
  40 #elif defined __APPLE__
  41 #include <stdio.h>
  42 #include <sys/types.h>
  43 #include <sys/sysctl.h>
  44
  45 static void ppc_init_cacheline_sizes(void)
  46 {
  47     size_t len;
  48     unsigned cacheline;
  49     int name[2] = { CTL_HW, HW_CACHELINE };
  50
  51     len = sizeof(cacheline);
  52     if (sysctl(name, 2, &cacheline, &len, NULL, 0)) {
  53         perror("sysctl CTL_HW HW_CACHELINE failed");
  54     } else {
  55         qemu_cache_conf.dcache_bsize = cacheline;
  56         qemu_cache_conf.icache_bsize = cacheline;
  57     }
  58 }
  59 #endif
  60
  61 #ifdef __linux__
  62 void qemu_cache_utils_init(char **envp)
  63 {
  64     ppc_init_cacheline_sizes(envp);
  65 }
  66 #else
  67 void qemu_cache_utils_init(char **envp)
  68 {
  69     (void) envp;
  70     ppc_init_cacheline_sizes();
  71 }
  72 #endif
  73
  74 #endif /* _ARCH_PPC */