Author: tfaber Date: Fri Sep 4 20:33:37 2015 New Revision: 69012 URL: http://svn.reactos.org/svn/reactos?rev=69012&view=rev Log: [NTOS:KE] - Fix KiGetCacheInformation for Intel processors according to the latest Intel Instruction Set Reference
Modified:
trunk/reactos/ntoskrnl/ke/i386/cpu.c
Modified: trunk/reactos/ntoskrnl/ke/i386/cpu.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/ke/i386/cpu.c?rev=69012&r1=69011&r2=69012&view=diff
==============================================================================
--- trunk/reactos/ntoskrnl/ke/i386/cpu.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/ke/i386/cpu.c [iso-8859-1] Fri Sep 4
20:33:37 2015
@@ -525,149 +525,114 @@
CurrentRegister >>= 8;
if (!RegisterByte) continue;
- /*
- * Valid values are from 0x40 (0 bytes) to 0x49
- * (32MB), or from 0x80 to 0x89 (same size but
- * 8-way associative.
- */
- if (((RegisterByte > 0x40) && (RegisterByte <=
0x47)) ||
- ((RegisterByte > 0x78) && (RegisterByte <=
0x7C)) ||
- ((RegisterByte > 0x80) && (RegisterByte <=
0x85)))
+ Size = 0;
+ switch (RegisterByte)
{
- /* Compute associativity */
- Associativity = 4;
- if (RegisterByte >= 0x79) Associativity = 8;
-
- /* Mask out only the first nibble */
- RegisterByte &= 0x07;
-
- /* Check if this cache is bigger than the last
*/
- Size = 0x10000 << RegisterByte;
- if ((Size / Associativity) > CurrentSize)
- {
- /* Set the L2 Cache Size and Associativity
*/
- CurrentSize = Size / Associativity;
- Pcr->SecondLevelCacheSize = Size;
- Pcr->SecondLevelCacheAssociativity =
Associativity;
- }
+ case 0x06:
+ case 0x08:
+ KePrefetchNTAGranularity = 32;
+ break;
+ case 0x09:
+ KePrefetchNTAGranularity = 64;
+ break;
+ case 0x0a:
+ case 0x0c:
+ KePrefetchNTAGranularity = 32;
+ break;
+ case 0x0d:
+ case 0x0e:
+ KePrefetchNTAGranularity = 64;
+ break;
+ case 0x1d:
+ Size = 128 * 1024;
+ Associativity = 2;
+ break;
+ case 0x21:
+ Size = 256 * 1024;
+ Associativity = 8;
+ break;
+ case 0x24:
+ Size = 1024 * 1024;
+ Associativity = 16;
+ break;
+ case 0x2c:
+ case 0x30:
+ KePrefetchNTAGranularity = 64;
+ break;
+ case 0x41:
+ case 0x42:
+ case 0x43:
+ case 0x44:
+ case 0x45:
+ Size = (1 << (RegisterByte - 0x41)) * 128
* 1024;
+ Associativity = 4;
+ break;
+ case 0x48:
+ Size = 3 * 1024 * 1024;
+ Associativity = 12;
+ break;
+ case 0x49:
+ Size = 4 * 1024 * 1024;
+ Associativity = 16;
+ break;
+ case 0x4e:
+ Size = 6 * 1024 * 1024;
+ Associativity = 24;
+ break;
+ case 0x60:
+ case 0x66:
+ case 0x67:
+ case 0x68:
+ KePrefetchNTAGranularity = 64;
+ break;
+ case 0x78:
+ Size = 1024 * 1024;
+ Associativity = 4;
+ break;
+ case 0x79:
+ case 0x7a:
+ case 0x7b:
+ case 0x7c:
+ case 0x7d:
+ Size = (1 << (RegisterByte - 0x79)) * 128
* 1024;
+ Associativity = 8;
+ break;
+ case 0x7f:
+ Size = 512 * 1024;
+ Associativity = 2;
+ break;
+ case 0x80:
+ Size = 512 * 1024;
+ Associativity = 8;
+ break;
+ case 0x82:
+ case 0x83:
+ case 0x84:
+ case 0x85:
+ Size = (1 << (RegisterByte - 0x82)) * 256
* 1024;
+ Associativity = 8;
+ break;
+ case 0x86:
+ Size = 512 * 1024;
+ Associativity = 4;
+ break;
+ case 0x87:
+ Size = 1024 * 1024;
+ Associativity = 8;
+ break;
+ case 0xf0:
+ KePrefetchNTAGranularity = 64;
+ break;
+ case 0xf1:
+ KePrefetchNTAGranularity = 128;
+ break;
}
- else if ((RegisterByte > 0x21) && (RegisterByte <=
0x29))
+ if (Size && (Size / Associativity) > CurrentSize)
{
- /* Set minimum cache line size */
- if (CacheLine < 128) CacheLine = 128;
-
- /* Hard-code size/associativity */
- Associativity = 8;
- switch (RegisterByte)
- {
- case 0x22:
- Size = 512 * 1024;
- Associativity = 4;
- break;
-
- case 0x23:
- Size = 1024 * 1024;
- break;
-
- case 0x25:
- Size = 2048 * 1024;
- break;
-
- case 0x29:
- Size = 4096 * 1024;
- break;
-
- default:
- Size = 0;
- break;
- }
-
- /* Check if this cache is bigger than the last
*/
- if ((Size / Associativity) > CurrentSize)
- {
- /* Set the L2 Cache Size and Associativity
*/
- CurrentSize = Size / Associativity;
- Pcr->SecondLevelCacheSize = Size;
- Pcr->SecondLevelCacheAssociativity =
Associativity;
- }
- }
- else if (((RegisterByte > 0x65) && (RegisterByte <
0x69)) ||
- (RegisterByte == 0x2C) || (RegisterByte
== 0xF0))
- {
- /* Indicates L1 cache line of 64 bytes */
- KePrefetchNTAGranularity = 64;
- }
- else if (RegisterByte == 0xF1)
- {
- /* Indicates L1 cache line of 128 bytes */
- KePrefetchNTAGranularity = 128;
- }
- else if (((RegisterByte >= 0x4A) && (RegisterByte
<= 0x4C)) ||
- (RegisterByte == 0x78) ||
- (RegisterByte == 0x7D) ||
- (RegisterByte == 0x7F) ||
- (RegisterByte == 0x86) ||
- (RegisterByte == 0x87))
- {
- /* Set minimum cache line size */
- if (CacheLine < 64) CacheLine = 64;
-
- /* Hard-code size/associativity */
- switch (RegisterByte)
- {
- case 0x4A:
- Size = 4 * 1024 * 1024;
- Associativity = 8;
- break;
-
- case 0x4B:
- Size = 6 * 1024 * 1024;
- Associativity = 12;
- break;
-
- case 0x4C:
- Size = 8 * 1024 * 1024;
- Associativity = 16;
- break;
-
- case 0x78:
- Size = 1 * 1024 * 1024;
- Associativity = 4;
- break;
-
- case 0x7D:
- Size = 2 * 1024 * 1024;
- Associativity = 8;
- break;
-
- case 0x7F:
- Size = 512 * 1024;
- Associativity = 2;
- break;
-
- case 0x86:
- Size = 512 * 1024;
- Associativity = 4;
- break;
-
- case 0x87:
- Size = 1 * 1024 * 1024;
- Associativity = 8;
- break;
-
- default:
- Size = 0;
- break;
- }
-
- /* Check if this cache is bigger than the last
*/
- if ((Size / Associativity) > CurrentSize)
- {
- /* Set the L2 Cache Size and Associativity
*/
- CurrentSize = Size / Associativity;
- Pcr->SecondLevelCacheSize = Size;
- Pcr->SecondLevelCacheAssociativity =
Associativity;
- }
+ /* Set the L2 Cache Size and Associativity */
+ CurrentSize = Size / Associativity;
+ Pcr->SecondLevelCacheSize = Size;
+ Pcr->SecondLevelCacheAssociativity =
Associativity;
}
}
}
