[PATCH] describe Intel cache descriptors.

Describe what the Intel cache descriptors actually mean in comments.  Taken
from 24151827.pdf.

Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/arch/i386/kernel/cpu/intel.c b/arch/i386/kernel/cpu/intel.c
index 29a3326897ca12ded92a467c66442807b4edcf8c..d13f9bb470df0b9e4589f1360f7a9444cece7f48 100644 (file)
--- a/arch/i386/kernel/cpu/intel.c
+++ b/arch/i386/kernel/cpu/intel.c
@@ -72,44 +72,44 @@ struct _cache_table
 /* all the cache descriptor types we care about (no TLB or trace cache entries) */
 static struct _cache_table cache_table[] __initdata =
 {
-       { 0x06, LVL_1_INST, 8 },
-       { 0x08, LVL_1_INST, 16 },
-       { 0x0a, LVL_1_DATA, 8 },
-       { 0x0c, LVL_1_DATA, 16 },
-       { 0x22, LVL_3,      512 },
-       { 0x23, LVL_3,      1024 },
-       { 0x25, LVL_3,      2048 },
-       { 0x29, LVL_3,      4096 },
-       { 0x2c, LVL_1_DATA, 32 },
-       { 0x30, LVL_1_INST, 32 },
-       { 0x39, LVL_2,      128 },
-       { 0x3b, LVL_2,      128 },
-       { 0x3c, LVL_2,      256 },
-       { 0x41, LVL_2,      128 },
-       { 0x42, LVL_2,      256 },
-       { 0x43, LVL_2,      512 },
-       { 0x44, LVL_2,      1024 },
-       { 0x45, LVL_2,      2048 },
-       { 0x60, LVL_1_DATA, 16 },
-       { 0x66, LVL_1_DATA, 8 },
-       { 0x67, LVL_1_DATA, 16 },
-       { 0x68, LVL_1_DATA, 32 },
-       { 0x70, LVL_TRACE,  12 },
-       { 0x71, LVL_TRACE,  16 },
-       { 0x72, LVL_TRACE,  32 },
-       { 0x78, LVL_2,      1024 },
-       { 0x79, LVL_2,      128 },
-       { 0x7a, LVL_2,      256 },
-       { 0x7b, LVL_2,      512 },
-       { 0x7c, LVL_2,      1024 },
-       { 0x7d, LVL_2,      2048 },
-       { 0x7f, LVL_2,      512 },
-       { 0x82, LVL_2,      256 },
-       { 0x83, LVL_2,      512 },
-       { 0x84, LVL_2,      1024 },
-       { 0x85, LVL_2,      2048 },
-       { 0x86, LVL_2,      512 },
-       { 0x87, LVL_2,      1024 },
+       { 0x06, LVL_1_INST, 8 },        /* 4-way set assoc, 32 byte line size */
+       { 0x08, LVL_1_INST, 16 },       /* 4-way set assoc, 32 byte line size */
+       { 0x0a, LVL_1_DATA, 8 },        /* 2 way set assoc, 32 byte line size */
+       { 0x0c, LVL_1_DATA, 16 },       /* 4-way set assoc, 32 byte line size */
+       { 0x22, LVL_3,      512 },      /* 4-way set assoc, sectored cache, 64 byte line size */
+       { 0x23, LVL_3,      1024 },     /* 8-way set assoc, sectored cache, 64 byte line size */
+       { 0x25, LVL_3,      2048 },     /* 8-way set assoc, sectored cache, 64 byte line size */
+       { 0x29, LVL_3,      4096 },     /* 8-way set assoc, sectored cache, 64 byte line size */
+       { 0x2c, LVL_1_DATA, 32 },       /* 8-way set assoc, 64 byte line size */
+       { 0x30, LVL_1_INST, 32 },       /* 8-way set assoc, 64 byte line size */
+       { 0x39, LVL_2,      128 },      /* 4-way set assoc, sectored cache, 64 byte line size */
+       { 0x3b, LVL_2,      128 },      /* 2-way set assoc, sectored cache, 64 byte line size */
+       { 0x3c, LVL_2,      256 },      /* 4-way set assoc, sectored cache, 64 byte line size */
+       { 0x41, LVL_2,      128 },      /* 4-way set assoc, 32 byte line size */
+       { 0x42, LVL_2,      256 },      /* 4-way set assoc, 32 byte line size */
+       { 0x43, LVL_2,      512 },      /* 4-way set assoc, 32 byte line size */
+       { 0x44, LVL_2,      1024 },     /* 4-way set assoc, 32 byte line size */
+       { 0x45, LVL_2,      2048 },     /* 4-way set assoc, 32 byte line size */
+       { 0x60, LVL_1_DATA, 16 },       /* 8-way set assoc, sectored cache, 64 byte line size */
+       { 0x66, LVL_1_DATA, 8 },        /* 4-way set assoc, sectored cache, 64 byte line size */
+       { 0x67, LVL_1_DATA, 16 },       /* 4-way set assoc, sectored cache, 64 byte line size */
+       { 0x68, LVL_1_DATA, 32 },       /* 4-way set assoc, sectored cache, 64 byte line size */
+       { 0x70, LVL_TRACE,  12 },       /* 8-way set assoc */
+       { 0x71, LVL_TRACE,  16 },       /* 8-way set assoc */
+       { 0x72, LVL_TRACE,  32 },       /* 8-way set assoc */
+       { 0x78, LVL_2,    1024 },       /* 4-way set assoc, 64 byte line size */
+       { 0x79, LVL_2,     128 },       /* 8-way set assoc, sectored cache, 64 byte line size */
+       { 0x7a, LVL_2,     256 },       /* 8-way set assoc, sectored cache, 64 byte line size */
+       { 0x7b, LVL_2,     512 },       /* 8-way set assoc, sectored cache, 64 byte line size */
+       { 0x7c, LVL_2,    1024 },       /* 8-way set assoc, sectored cache, 64 byte line size */
+       { 0x7d, LVL_2,    2048 },       /* 8-way set assoc, 64 byte line size */
+       { 0x7f, LVL_2,     512 },       /* 2-way set assoc, 64 byte line size */
+       { 0x82, LVL_2,     256 },       /* 8-way set assoc, 32 byte line size */
+       { 0x83, LVL_2,     512 },       /* 8-way set assoc, 32 byte line size */
+       { 0x84, LVL_2,    1024 },       /* 8-way set assoc, 32 byte line size */
+       { 0x85, LVL_2,    2048 },       /* 8-way set assoc, 32 byte line size */
+       { 0x86, LVL_2,     512 },       /* 4-way set assoc, 64 byte line size */
+       { 0x87, LVL_2,    1024 },       /* 8-way set assoc, 64 byte line size */
        { 0x00, 0, 0}
 };