x86/centaur: merge 32 & 64 bit version

there should be no difference, except:

 * the 64bit variant now also initializes the padlock unit.
 * ->c_early_init() is executed again from ->c_init()
 * the 64bit fixups made into 32bit path.

Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Cc: herbert@gondor.apana.org.au
LKML-Reference: <1237029843-28076-2-git-send-email-sebastian@breakpoint.cc>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

4 files changed, 29 insertions, 62 deletions

diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
index a95eaf0e582a..924e156a85ab 100644
--- a/arch/x86/Kconfig.cpu
+++ b/arch/x86/Kconfig.cpu
@@ -456,24 +456,9 @@ config CPU_SUP_AMD
 
           If unsure, say N.
 
-config CPU_SUP_CENTAUR_32
+config CPU_SUP_CENTAUR
         default y
         bool "Support Centaur processors" if PROCESSOR_SELECT
-        depends on !64BIT
-        ---help---
-          This enables detection, tunings and quirks for Centaur processors
-
-          You need this enabled if you want your kernel to run on a
-          Centaur CPU. Disabling this option on other types of CPUs
-          makes the kernel a tiny bit smaller. Disabling it on a Centaur
-          CPU might render the kernel unbootable.
-
-          If unsure, say N.
-
-config CPU_SUP_CENTAUR_64
-        default y
-        bool "Support Centaur processors" if PROCESSOR_SELECT
-        depends on 64BIT
         ---help---
           This enables detection, tunings and quirks for Centaur processors
 
diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile
index d4356f8b7522..4e242f9a06e4 100644
--- a/arch/x86/kernel/cpu/Makefile
+++ b/arch/x86/kernel/cpu/Makefile
@@ -19,8 +19,7 @@ obj-$(CONFIG_X86_CPU_DEBUG)		+= cpu_debug.o
 obj-$(CONFIG_CPU_SUP_INTEL)             += intel.o
 obj-$(CONFIG_CPU_SUP_AMD)               += amd.o
 obj-$(CONFIG_CPU_SUP_CYRIX_32)          += cyrix.o
-obj-$(CONFIG_CPU_SUP_CENTAUR_32)        += centaur.o
-obj-$(CONFIG_CPU_SUP_CENTAUR_64)        += centaur_64.o
+obj-$(CONFIG_CPU_SUP_CENTAUR)           += centaur.o
 obj-$(CONFIG_CPU_SUP_TRANSMETA_32)      += transmeta.o
 obj-$(CONFIG_CPU_SUP_UMC_32)            += umc.o
 
diff --git a/arch/x86/kernel/cpu/centaur.c b/arch/x86/kernel/cpu/centaur.c
index 983e0830f0da..c95e831bb095 100644
--- a/arch/x86/kernel/cpu/centaur.c
+++ b/arch/x86/kernel/cpu/centaur.c
@@ -1,11 +1,11 @@
+#include <linux/bitops.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
-#include <linux/bitops.h>
 
 #include <asm/processor.h>
-#include <asm/msr.h>
 #include <asm/e820.h>
 #include <asm/mtrr.h>
+#include <asm/msr.h>
 
 #include "cpu.h"
 
@@ -276,7 +276,7 @@ static void __cpuinit init_c3(struct cpuinfo_x86 *c)
                  */
                 c->x86_capability[5] = cpuid_edx(0xC0000001);
         }
-
+#ifdef CONFIG_X86_32
         /* Cyrix III family needs CX8 & PGE explicitly enabled. */
         if (c->x86_model >= 6 && c->x86_model <= 9) {
                 rdmsr(MSR_VIA_FCR, lo, hi);
@@ -288,6 +288,11 @@ static void __cpuinit init_c3(struct cpuinfo_x86 *c)
         /* Before Nehemiah, the C3's had 3dNOW! */
         if (c->x86_model >= 6 && c->x86_model < 9)
                 set_cpu_cap(c, X86_FEATURE_3DNOW);
+#endif
+        if (c->x86 == 0x6 && c->x86_model >= 0xf) {
+                c->x86_cache_alignment = c->x86_clflush_size * 2;
+                set_cpu_cap(c, X86_FEATURE_REP_GOOD);
+        }
 
         display_cacheinfo(c);
 }
@@ -316,16 +321,25 @@ enum {
 static void __cpuinit early_init_centaur(struct cpuinfo_x86 *c)
 {
         switch (c->x86) {
+#ifdef CONFIG_X86_32
         case 5:
                 /* Emulate MTRRs using Centaur's MCR. */
                 set_cpu_cap(c, X86_FEATURE_CENTAUR_MCR);
                 break;
+#endif
+        case 6:
+                if (c->x86_model >= 0xf)
+                        set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
+                break;
         }
+#ifdef CONFIG_X86_64
+        set_cpu_cap(c, X86_FEATURE_SYSENTER32);
+#endif
 }
 
 static void __cpuinit init_centaur(struct cpuinfo_x86 *c)
 {
-
+#ifdef CONFIG_X86_32
         char *name;
         u32  fcr_set = 0;
         u32  fcr_clr = 0;
@@ -337,8 +351,10 @@ static void __cpuinit init_centaur(struct cpuinfo_x86 *c)
          * 3DNow is IDd by bit 31 in extended CPUID (1*32+31) anyway
          */
         clear_cpu_cap(c, 0*32+31);
-
+#endif
+        early_init_centaur(c);
         switch (c->x86) {
+#ifdef CONFIG_X86_32
         case 5:
                 switch (c->x86_model) {
                 case 4:
@@ -442,16 +458,20 @@ static void __cpuinit init_centaur(struct cpuinfo_x86 *c)
                 }
                 sprintf(c->x86_model_id, "WinChip %s", name);
                 break;
-
+#endif
         case 6:
                 init_c3(c);
                 break;
         }
+#ifdef CONFIG_X86_64
+        set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
+#endif
 }
 
 static unsigned int __cpuinit
 centaur_size_cache(struct cpuinfo_x86 *c, unsigned int size)
 {
+#ifdef CONFIG_X86_32
         /* VIA C3 CPUs (670-68F) need further shifting. */
         if ((c->x86 == 6) && ((c->x86_model == 7) || (c->x86_model == 8)))
                 size >>= 8;
@@ -464,7 +484,7 @@ centaur_size_cache(struct cpuinfo_x86 *c, unsigned int size)
         if ((c->x86 == 6) && (c->x86_model == 9) &&
                                 (c->x86_mask == 1) && (size == 65))
                 size -= 1;
-
+#endif
         return size;
 }
 
diff --git a/arch/x86/kernel/cpu/centaur_64.c b/arch/x86/kernel/cpu/centaur_64.c
deleted file mode 100644
index 51b09c48c9c7..000000000000
--- a/arch/x86/kernel/cpu/centaur_64.c
+++ /dev/null
@@ -1,37 +0,0 @@
-#include <linux/init.h>
-#include <linux/smp.h>
-
-#include <asm/cpufeature.h>
-#include <asm/processor.h>
-
-#include "cpu.h"
-
-static void __cpuinit early_init_centaur(struct cpuinfo_x86 *c)
-{
-        if (c->x86 == 0x6 && c->x86_model >= 0xf)
-                set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
-
-        set_cpu_cap(c, X86_FEATURE_SYSENTER32);
-}
-
-static void __cpuinit init_centaur(struct cpuinfo_x86 *c)
-{
-        early_init_centaur(c);
-
-        if (c->x86 == 0x6 && c->x86_model >= 0xf) {
-                c->x86_cache_alignment = c->x86_clflush_size * 2;
-                set_cpu_cap(c, X86_FEATURE_REP_GOOD);
-        }
-        set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
-}
-
-static const struct cpu_dev centaur_cpu_dev __cpuinitconst = {
-        .c_vendor       = "Centaur",
-        .c_ident        = { "CentaurHauls" },
-        .c_early_init   = early_init_centaur,
-        .c_init         = init_centaur,
-        .c_x86_vendor   = X86_VENDOR_CENTAUR,
-};
-
-cpu_dev_register(centaur_cpu_dev);
-