This patch, against 2.3.99-pre6-7, adds VIA Cyrix III detection
code to arch/i386/kernel/setup.c. Code written from published
specs, but untested as I don't have a Cyrix III myself.
Anyone with a Cyrix III care to test it?
/Mikael
--- linux-2.3.99-pre6p7/arch/i386/kernel/setup.c.~1~ Wed Apr 26 21:45:33 2000
+++ linux-2.3.99-pre6p7/arch/i386/kernel/setup.c Thu Apr 27 01:11:44 2000
@@ -1070,6 +1070,40 @@
c->x86_capability |= X86_FEATURE_MTRR;
break;
+ case 8: /* Cyrix III */
+ /* Integrated 256KB L2 cache. */
+ c->x86_cache_size = 256;
+ /* Use extended CPUID levels to get extended feature
+ flags and CPU marketing name. */
+ get_model_name(c);
+ /* Emulate MTRRs using Cyrix' ARRs. */
+ c->x86_capability |= X86_FEATURE_MTRR;
+ /*
+ * Construct the multiplier string:
+ *
+ * dir0_lsn multiplier
+ * 0100 2.5
+ * 0001 3.0
+ * 0101 3.5
+ * 0010 4.0
+ * 0110 4.5
+ * 0011 5.0
+ * 0111 5.5
+ * 1000 6.0
+ * 1010 6.5
+ * 1001 7.0
+ * 1011 7.5
+ */
+ if (dir0_lsn & 8) {
+ p = Cx86_cb + ((dir0_lsn & 2) ? 0 : 2);
+ p[0] = '6' + (dir0_lsn & 1);
+ } else {
+ p = Cx86_cb + ((dir0_lsn & 4) ? 0 : 2);
+ p[0] = '2' + (dir0_lsn & 3);
+ }
+ strcat(buf, p);
+ return;
+
case 0xf: /* Cyrix 486 without DEVID registers */
switch (dir0_lsn) {
case 0xd: /* either a 486SLC or DLC w/o DEVID */
@@ -1471,6 +1505,8 @@
case X86_VENDOR_CYRIX:
x86_cap_flags[24] = "cxmmx";
+ if (Cx86_dir0_msb >= 8) /* Cyrix III and above */
+ x86_cap_flags[31] = "3dnow";
break;
case X86_VENDOR_AMD:
-
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