diff options
| author | Ahmed Samy <f.fallen45@gmail.com> | 2013-09-26 14:13:12 +0000 |
|---|---|---|
| committer | Ahmed Samy <f.fallen45@gmail.com> | 2013-09-26 14:13:12 +0000 |
| commit | c9345f68da9df5b5aa499d77cd31dc0bc9fc45d7 (patch) | |
| tree | 8b19745767b04088e6dc72756d160cde037c3265 | |
| parent | 2df53ae1a1705474cd776d24b03f12818f77b232 (diff) | |
cpuid: parse CPU L1 cache and TLB identifications
Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>
| -rw-r--r-- | ccan/cpuid/cpuid.c | 4 | ||||
| -rw-r--r-- | ccan/cpuid/cpuid.h | 20 |
2 files changed, 24 insertions, 0 deletions
diff --git a/ccan/cpuid/cpuid.c b/ccan/cpuid/cpuid.c index 8b2024cb..6133e13f 100644 --- a/ccan/cpuid/cpuid.c +++ b/ccan/cpuid/cpuid.c @@ -260,6 +260,10 @@ void cpuid(cpuid_t info, uint32_t *buf) buf[1] = ecx; break; case CPU_L1_CACHE_AND_TLB_IDS: + buf[0] = eax; + buf[1] = ebx; + buf[2] = ecx; + buf[3] = edx; break; case CPU_EXTENDED_L2_CACHE_FEATURES: *buf = ecx; diff --git a/ccan/cpuid/cpuid.h b/ccan/cpuid/cpuid.h index 8988949e..305d69aa 100644 --- a/ccan/cpuid/cpuid.h +++ b/ccan/cpuid/cpuid.h @@ -182,6 +182,23 @@ uint32_t cpuid_highest_ext_func_supported(void); * buf[3]: * Additional feature information. * + * For CPU_L1_CACHE_AND_TLB_IDS: + * buf[0]: (eax): + * - 7..0 Number of times to exec cpuid to get all descriptors. + * - 15..8 Instruction TLB: 4K Pages, 4-way set associtive, 128 entries. + * - 23..16 Data TLB: 4k Pages, 4-way set associtive, 128 entries. + * - 24..31 Instruction TLB: 4K Pages, 4-way set associtive, 2 entries. + * buf[1]: (ebx): + * - 7..0 64-byte prefetching + * - 8..31 Null descriptor + * buf[2]: (ecx): + * - 0..31 Null descriptor + * buf[3]: (edx): + * - 7..0 2nd-level cache, 2M, 8-way set associtive, 64-byte line size + * - 15..8 1st-level instruction cache: 32K, 8-way set associtive, 64 byte line size + * - 16..23 Data TLB: 4M Pages, 4-way set associtive, 8 entires. + * - 24..31 1st-level data cache: 32K, 8-way set associtive, 64 byte line size + * * For CPU_HIGHEST_EXTENDED_FUNCTION_SUPPORTED: * Returns the highest supported function in *buf (expects an integer ofc) * @@ -194,6 +211,9 @@ uint32_t cpuid_highest_ext_func_supported(void); * For CPU_PROC_BRAND_STRING: * Have a char array with at least 48 bytes assigned to it. * + * Here's a page which will help you parse the data provided by this function. + * http://www.flounder.com/cpuid_explorer2.htm + * * If an invalid flag has been passed a 0xbaadf00d is returned in *buf. */ void cpuid(cpuid_t info, uint32_t *buf); |