Commit 48f4c485 authored by Sebastian Andrzej Siewior's avatar Sebastian Andrzej Siewior Committed by Ingo Molnar
Browse files

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: default avatarSebastian 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: default avatarIngo Molnar <mingo@elte.hu>
parent 0ca0f16f

arch/x86/Kconfig.cpu

+1 −16
Original line number Diff line number Diff line
@@ -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

arch/x86/kernel/cpu/Makefile

+1 −2
Original line number Diff line number Diff line
@@ -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

arch/x86/kernel/cpu/centaur.c

+27 −7
Original line number Diff line number Diff line 
#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;

}

arch/x86/kernel/cpu/centaur_64.c

deleted100644 → 0
+0 −37
Original line number Diff line number Diff line 
#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);

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