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refs #464. Fixed the bug of detecting L2 associative on x86.

This commit is contained in:
Zhang Xianyi 2014-11-10 17:15:34 +08:00
parent 695e0fa649
commit 2987bc7b40
1 changed files with 33 additions and 8 deletions
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25
cpuid_x86.c
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@ -853,13 +853,26 @@ int get_cacheinfo(int type, cache_info_t *cacheinfo){
if (get_vendor() == VENDOR_INTEL) {
cpuid(0x80000000, &cpuid_level, &ebx, &ecx, &edx);
if (cpuid_level >= 0x80000006) {
if(L2.size<=0){
//If we didn't detect L2 correctly before,
cpuid(0x80000006, &eax, &ebx, &ecx, &edx);
L2.size = BITMASK(ecx, 16, 0xffff);
L2.associative = BITMASK(ecx, 12, 0x0f);
switch (L2.associative){
case 0x06:
L2.associative = 8;
break;
case 0x08:
L2.associative = 16;
break;
}
L2.linesize = BITMASK(ecx, 0, 0xff);
}
}
}
if ((get_vendor() == VENDOR_AMD) || (get_vendor() == VENDOR_CENTAUR)) {
cpuid(0x80000005, &eax, &ebx, &ecx, &edx);
@ -916,10 +929,22 @@ int get_cacheinfo(int type, cache_info_t *cacheinfo){
if (L2ITB.associative == 0xff) L2ITB.associative = 0;
L2ITB.linesize = BITMASK(ebx, 0, 0xff);
if(L2.size <= 0){
//If we didn't detect L2 correctly before,
L2.size = BITMASK(ecx, 16, 0xffff);
L2.associative = BITMASK(ecx, 12, 0xf);
switch (L2.associative){
case 0x06:
L2.associative = 8;
break;
case 0x08:
L2.associative = 16;
break;
}
if (L2.associative == 0xff) L2.associative = 0;
L2.linesize = BITMASK(ecx, 0, 0xff);
}
L3.size = BITMASK(edx, 18, 0x3fff) * 512;
L3.associative = BITMASK(edx, 12, 0xf);