target-i386: Add Core Duo Definition

This patch adds a CPU definition for the Core Duo CPU. I tried to
resemble the original as closely as possible and document what features
are missing still. This patch enables the use of a recent CPU definition
on 32 bit platforms.

It also fixes two issues that went along the line:

- invalid xlevel in core2duo spec
  While looking though the CPUIDs again, I found that xlevel is actually 8.

- non-PSE36 support
  The CoreDuo CPUID does not expose the PSE36 capability, but CPUID
0x80000008 is tied to 36 bits. This broke Windows XP installation for
me, so I just set it to 32 bits width when PSE36 is not available. The
original CPU also exposes 32 bit width in CPUID 0x80000008.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5488 c046a42c-6fe2-441c-8c8c-71466251a162

target-i386/op_helper.c

@@ -2026,7 +2026,10 @@ void helper_cpuid(void)
 #if defined(USE_KQEMU)
             EAX = 0x00000020;	/* 32 bits physical */
 #else
-            EAX = 0x00000024;	/* 36 bits physical */
+            if (env->cpuid_features & CPUID_PSE36)
+                EAX = 0x00000024; /* 36 bits physical */
+            else
+                EAX = 0x00000020; /* 32 bits physical */
 #endif
         }
         EBX = 0;