cpuid: parse L1 cache information for AMD.
authorAhmed Samy <f.fallen45@gmail.com>
Mon, 11 Nov 2013 16:21:31 +0000 (18:21 +0200)
committerAhmed Samy <f.fallen45@gmail.com>
Mon, 11 Nov 2013 16:21:31 +0000 (18:21 +0200)
Also take out additional feature information from processor information
and feature bits since they can be tested using cpuid_test_feature() and
cpuid_has_feature()

Signed-off-by: Ahmed Samy <f.fallen45@gmail.com>
ccan/cpuid/cpuid.c
ccan/cpuid/cpuid.h
ccan/cpuid/test/run.c

index 2ea522b71d64c489f2db4f0b5df28fca4bb5e2a5..a64b1575092ad0daa770cb90c0761ab54f85a32b 100644 (file)
@@ -310,14 +310,11 @@ void cpuid(cpuid_t info, uint32_t *buf)
                        buf[3] = (eax >> 16) & 0x0F;    /* Extended Model.  */
                        buf[4] = (eax >> 24) & 0x0F;    /* Extended Family.  */
 
-                       buf[5] = edx;                   /* Feature flags #1.  */
-                       buf[6] = ecx;                   /* Feature flags #2.  */
-
                        /* Additional Feature information.  */
-                       buf[7] = ebx & 0xFF;
-                       buf[8] = (ebx >> 8) & 0xFF;
-                       buf[9] = (ebx >> 16) & 0xFF;
-                       buf[10] = (ebx >> 24) & 0xFF;
+                       buf[5] = ebx & 0xFF;
+                       buf[6] = (ebx >> 8) & 0xFF;
+                       buf[7] = (ebx >> 16) & 0xFF;
+                       buf[8] = (ebx >> 24) & 0xFF;
                        break;
                case CPUID_CACHE_AND_TLBD_INFO:
                        buf[0] = eax;
@@ -330,10 +327,25 @@ void cpuid(cpuid_t info, uint32_t *buf)
                        buf[1] = ecx;
                        break;
                case CPUID_L1_CACHE_AND_TLB_IDS:
-                       buf[0] = eax;
-                       buf[1] = ebx;
-                       buf[2] = ecx;
-                       buf[3] = edx;
+                       buf[0] = eax & 0xFF;
+                       buf[1] = (eax >> 8) & 0xFF;
+                       buf[2] = (eax >> 16) & 0xFF;
+                       buf[3] = (eax >> 24) & 0xFF;
+
+                       buf[4] = ebx & 0xFF;
+                       buf[5] = (ebx >> 8) & 0xFF;
+                       buf[6] = (ebx >> 16) & 0xFF;
+                       buf[7] = (ebx >> 24) & 0xFF;
+
+                       buf[8] = ecx & 0xFF;
+                       buf[9] = (ecx >> 8) & 0xFF;
+                       buf[10] = (ecx >> 16) & 0xFF;
+                       buf[11] = (ecx >> 24) & 0xFF;
+
+                       buf[12] = edx & 0xFF;
+                       buf[13] = (edx >> 8) & 0xFF;
+                       buf[14] = (edx >> 16) & 0xFF;
+                       buf[15] = (edx >> 24) & 0xFF;
                        break;
                case CPUID_EXTENDED_L2_CACHE_FEATURES:
                        buf[0] = ecx & 0xFF;            /* Line size.  */
index 9bf4ff31d8cf516640706588b123d321fe3a7086..5de2ed157be15becafcb7ec488754d98e3cddf90 100644 (file)
@@ -38,6 +38,7 @@
  *
  * CPUID_CACHE_AND_TLBD_INFO
  *     Cache and TLBD Information.
+ *     For AMD: Use CPUID_EXTENDED_L2_CACHE_FEATURES
  *
  * CPUID_HIGHEST_EXTENDED_FUNCTION_SUPPORTED:
  *     Highest extended function supported address.
@@ -51,6 +52,7 @@
  *
  * CPUID_L1_CACHE_AND_TLB_IDS:
  *     L1 Cache and TLB Identifications.
+ *     AMD Only.
  *
  * CPUID_EXTENDED_L2_CACHE_FEATURES:
  *     Extended L2 Cache features.
@@ -217,29 +219,32 @@ uint32_t cpuid_highest_ext_func_supported(void);
  *     buf[2]: Family
  *     buf[3]: Extended Model
  *     buf[4]: Extended Family
- *     buf[5] and buf[6]:
- *             Feature flags
- *     buf[7]: Brand Index
- *     buf[8]: CL Flush Line Size
- *     buf[9]: Logical Processors
- *     buf[10]: Initial APICID
+ *     buf[5]: Brand Index
+ *     buf[6]: CL Flush Line Size
+ *     buf[7]: Logical Processors
+ *     buf[8]: Initial APICID
  *
  * For CPUID_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
+ *     buf[0] to buf[3]: 2M+4M page TLB info
+ *             0: Inst count
+ *             1: Inst Assoc
+ *             2: Data Count
+ *             3: Data Assoc
+ *     buf[4] to buf[7]: 4k page TLB info
+ *             0: Inst count
+ *             1: Inst Assoc
+ *             2: Data Count
+ *             3: Data Assoc
+ *     buf[8] to buf[11]: L1 data cache information
+ *             0: Line Size
+ *             1: LinesPerTag
+ *             2: Associativity
+ *             3: CacheSize
+ *     buf[12] to buf[15]: L1 instruction cache info
+ *             0: Line Size
+ *             1: LinesPerTag
+ *             2: Associativity
+ *             3: CacheSize
  *
  * For CPUID_HIGHEST_EXTENDED_FUNCTION_SUPPORTED:
  *     Returns the highest supported function in *buf (expects an integer ofc)
index f7b52e41676ba0bb056c0208fcec7e99aaa88d0a..0d2bebd6b05b7174bdb55f1fae1ca8cfc3e6b659 100644 (file)
@@ -18,12 +18,12 @@ int main(void)
        cpuid(CPUID_PROC_BRAND_STRING, (uint32_t *)buf);
        printf ("Processor Brand: %s\n", buf);
 
-       uint32_t procinfo[11];
+       uint32_t procinfo[9];
        cpuid(CPUID_PROCINFO_AND_FEATUREBITS, procinfo);
        printf("Stepping: %d Model: 0x%X Family: %d extended model: %d extended family: %d\n",
                procinfo[0], procinfo[1], procinfo[2], procinfo[3], procinfo[4]);
        printf("Brand Index: %d CL Flush Line Size: %d Logical Processors: %d Initial APICID: %d\n",
-               procinfo[7], procinfo[8], procinfo[9], procinfo[10]);
+               procinfo[5], procinfo[6], procinfo[7], procinfo[8]);
 
        printf ("Highest extended function supported: %#010x\n", cpuid_highest_ext_func_supported());