diff options
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/x86_64/cacheinfo.c | 58 |
1 files changed, 56 insertions, 2 deletions
diff --git a/sysdeps/x86_64/cacheinfo.c b/sysdeps/x86_64/cacheinfo.c index 8855b6d45f..eef7fa8726 100644 --- a/sysdeps/x86_64/cacheinfo.c +++ b/sysdeps/x86_64/cacheinfo.c @@ -259,7 +259,8 @@ handle_amd (int name) : "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx) : "0" (0x80000000)); - if (name >= _SC_LEVEL3_CACHE_SIZE) + /* No level 4 cache (yet). */ + if (name > _SC_LEVEL3_CACHE_LINESIZE) return 0; unsigned int fn = 0x80000005 + (name >= _SC_LEVEL2_CACHE_SIZE); @@ -280,16 +281,20 @@ handle_amd (int name) { case _SC_LEVEL1_DCACHE_SIZE: return (ecx >> 14) & 0x3fc00; + case _SC_LEVEL1_DCACHE_ASSOC: ecx >>= 16; if ((ecx & 0xff) == 0xff) /* Fully associative. */ return (ecx << 2) & 0x3fc00; return ecx & 0xff; + case _SC_LEVEL1_DCACHE_LINESIZE: return ecx & 0xff; + case _SC_LEVEL2_CACHE_SIZE: return (ecx & 0xf000) == 0 ? 0 : (ecx >> 6) & 0x3fffc00; + case _SC_LEVEL2_CACHE_ASSOC: ecx >>= 12; switch (ecx & 0xf) @@ -303,13 +308,62 @@ handle_amd (int name) return 8; case 8: return 16; - case 0xf: + case 10: + return 32; + case 11: + return 48; + case 12: + return 64; + case 13: + return 96; + case 14: + return 128; + case 15: return (ecx << 6) & 0x3fffc00; default: return 0; } + /* NOTREACHED */ + case _SC_LEVEL2_CACHE_LINESIZE: return (ecx & 0xf000) == 0 ? 0 : ecx & 0xff; + + case _SC_LEVEL3_CACHE_SIZE: + return (edx & 0xf000) == 0 ? 0 : (edx & 0x3ffc0000) << 1; + + case _SC_LEVEL3_CACHE_ASSOC: + edx >>= 12; + switch (edx & 0xf) + { + case 0: + case 1: + case 2: + case 4: + return edx & 0xf; + case 6: + return 8; + case 8: + return 16; + case 10: + return 32; + case 11: + return 48; + case 12: + return 64; + case 13: + return 96; + case 14: + return 128; + case 15: + return (edx & 0x3ffc0) << 13; + default: + return 0; + } + /* NOTREACHED */ + + case _SC_LEVEL3_CACHE_LINESIZE: + return (edx & 0xf000) == 0 ? 0 : edx & 0xff; + default: assert (! "cannot happen"); } |