x86: cpu make amd.c more like amd_64.c v2

1. make 32bit have early_init_amd_mc and amd_detect_cmp
2. seperate init_amd_k5/k6/k7 ...

v2: fix compiling for !CONFIG_SMP
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/cpu/amd_64.c

@@ -174,17 +174,20 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
 	if (c->extended_cpuid_level >= 0x80000008)
 		amd_detect_cmp(c);
 
-	if (c->extended_cpuid_level >= 0x80000006 &&
-		(cpuid_edx(0x80000006) & 0xf000))
-		num_cache_leaves = 4;
-	else
-		num_cache_leaves = 3;
+	if (c->extended_cpuid_level >= 0x80000006) {
+		if ((c->x86 >= 0x0f) && (cpuid_edx(0x80000006) & 0xf000))
+			num_cache_leaves = 4;
+		else
+			num_cache_leaves = 3;
+	}
 
 	if (c->x86 >= 0xf && c->x86 <= 0x11)
 		set_cpu_cap(c, X86_FEATURE_K8);
 
-	/* MFENCE stops RDTSC speculation */
-	set_cpu_cap(c, X86_FEATURE_MFENCE_RDTSC);
+	if (cpu_has_xmm2) {
+		/* MFENCE stops RDTSC speculation */
+		set_cpu_cap(c, X86_FEATURE_MFENCE_RDTSC);
+	}
 
 	if (c->x86 == 0x10) {
 		/* do this for boot cpu */

arch/x86/kernel/cpu/common.c

@@ -629,8 +629,8 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
 	c->x86_vendor_id[0] = '\0'; /* Unset */
 	c->x86_model_id[0] = '\0';  /* Unset */
 	c->x86_max_cores = 1;
-#ifdef CONFIG_X86_64
 	c->x86_coreid_bits = 0;
+#ifdef CONFIG_X86_64
 	c->x86_clflush_size = 64;
 #else
 	c->cpuid_level = -1;	/* CPUID not detected */

include/asm-x86/processor.h

@@ -75,9 +75,9 @@ struct cpuinfo_x86 {
 	int			 x86_tlbsize;
 	__u8			x86_virt_bits;
 	__u8			x86_phys_bits;
+#endif
 	/* CPUID returned core id bits: */
 	__u8			x86_coreid_bits;
-#endif
 	/* Max extended CPUID function supported: */
 	__u32			extended_cpuid_level;
 	/* Maximum supported CPUID level, -1=no CPUID: */