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Commit 69f24d17 authored by Ralf Baechle's avatar Ralf Baechle
Browse files

MIPS: Optimize current_cpu_type() for better code. 



 o Move current_cpu_type() to a separate header file
 o #ifdefing on supported CPU types lets modern GCC know that certain
   code in callers may be discarded ideally turning current_cpu_type() into
   a function returning a constant.
 o Use current_cpu_type() rather than direct access to struct cpuinfo_mips.

Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5833/
parent ff522058

arch/mips/cavium-octeon/csrc-octeon.c

+1 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
#include <linux/smp.h>



#include <asm/cpu-info.h>

#include <asm/cpu-type.h>

#include <asm/time.h>



#include <asm/octeon/octeon.h>

arch/mips/dec/prom/init.c

+1 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ 


#include <asm/bootinfo.h>

#include <asm/cpu.h>

#include <asm/cpu-type.h>

#include <asm/processor.h>



#include <asm/dec/prom.h>

arch/mips/include/asm/cpu-features.h

+0 −6
Original line number Diff line number Diff line
@@ -13,12 +13,6 @@ 
#include <asm/cpu-info.h>

#include <cpu-feature-overrides.h>



#ifndef current_cpu_type

#define current_cpu_type()	current_cpu_data.cputype

#endif



#define boot_cpu_type()		cpu_data[0].cputype



/*

 * SMP assumption: Options of CPU 0 are a superset of all processors.

 * This is true for all known MIPS systems.

arch/mips/include/asm/cpu-type.h

0 → 100644
+203 −0
Original line number Diff line number Diff line 
/*

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file "COPYING" in the main directory of this archive

 * for more details.

 *

 * Copyright (C) 2003, 2004 Ralf Baechle

 * Copyright (C) 2004  Maciej W. Rozycki

 */

#ifndef __ASM_CPU_TYPE_H

#define __ASM_CPU_TYPE_H



#include <linux/smp.h>

#include <linux/compiler.h>



static inline int __pure __get_cpu_type(const int cpu_type)

{

	switch (cpu_type) {

#if defined(CONFIG_SYS_HAS_CPU_LOONGSON2E) || \

    defined(CONFIG_SYS_HAS_CPU_LOONGSON2F)

	case CPU_LOONGSON2:

#endif



#ifdef CONFIG_SYS_HAS_CPU_LOONGSON1B

	case CPU_LOONGSON1:

#endif



#ifdef CONFIG_SYS_HAS_CPU_MIPS32_R1

	case CPU_4KC:

	case CPU_ALCHEMY:

	case CPU_BMIPS3300:

	case CPU_BMIPS4350:

	case CPU_PR4450:

	case CPU_BMIPS32:

	case CPU_JZRISC:

#endif



#if defined(CONFIG_SYS_HAS_CPU_MIPS32_R1) || \

    defined(CONFIG_SYS_HAS_CPU_MIPS32_R2)

	case CPU_4KEC:

#endif



#ifdef CONFIG_SYS_HAS_CPU_MIPS32_R2

	case CPU_4KSC:

	case CPU_24K:

	case CPU_34K:

	case CPU_1004K:

	case CPU_74K:

	case CPU_M14KC:

	case CPU_M14KEC:

#endif



#ifdef CONFIG_SYS_HAS_CPU_MIPS64_R1

	case CPU_5KC:

	case CPU_5KE:

	case CPU_20KC:

	case CPU_25KF:

	case CPU_SB1:

	case CPU_SB1A:

#endif



#ifdef CONFIG_SYS_HAS_CPU_MIPS64_R2

	/*

	 * All MIPS64 R2 processors have their own special symbols.  That is,

	 * there currently is no pure R2 core

	 */

#endif



#ifdef CONFIG_SYS_HAS_CPU_R3000

	case CPU_R2000:

	case CPU_R3000:

	case CPU_R3000A:

	case CPU_R3041:

	case CPU_R3051:

	case CPU_R3052:

	case CPU_R3081:

	case CPU_R3081E:

#endif



#ifdef CONFIG_SYS_HAS_CPU_TX39XX

	case CPU_TX3912:

	case CPU_TX3922:

	case CPU_TX3927:

#endif



#ifdef CONFIG_SYS_HAS_CPU_VR41XX

	case CPU_VR41XX:

	case CPU_VR4111:

	case CPU_VR4121:

	case CPU_VR4122:

	case CPU_VR4131:

	case CPU_VR4133:

	case CPU_VR4181:

	case CPU_VR4181A:

#endif



#ifdef CONFIG_SYS_HAS_CPU_R4300

	case CPU_R4300:

	case CPU_R4310:

#endif



#ifdef CONFIG_SYS_HAS_CPU_R4X00

	case CPU_R4000PC:

	case CPU_R4000SC:

	case CPU_R4000MC:

	case CPU_R4200:

	case CPU_R4400PC:

	case CPU_R4400SC:

	case CPU_R4400MC:

	case CPU_R4600:

	case CPU_R4700:

	case CPU_R4640:

	case CPU_R4650:

#endif



#ifdef CONFIG_SYS_HAS_CPU_TX49XX

	case CPU_TX49XX:

#endif



#ifdef CONFIG_SYS_HAS_CPU_R5000

	case CPU_R5000:

#endif



#ifdef CONFIG_SYS_HAS_CPU_R5432

	case CPU_R5432:

#endif



#ifdef CONFIG_SYS_HAS_CPU_R5500

	case CPU_R5500:

#endif



#ifdef CONFIG_SYS_HAS_CPU_R6000

	case CPU_R6000:

	case CPU_R6000A:

#endif



#ifdef CONFIG_SYS_HAS_CPU_NEVADA

	case CPU_NEVADA:

#endif



#ifdef CONFIG_SYS_HAS_CPU_R8000

	case CPU_R8000:

#endif



#ifdef CONFIG_SYS_HAS_CPU_R10000

	case CPU_R10000:

	case CPU_R12000:

	case CPU_R14000:

#endif

#ifdef CONFIG_SYS_HAS_CPU_RM7000

	case CPU_RM7000:

	case CPU_SR71000:

#endif

#ifdef CONFIG_SYS_HAS_CPU_RM9000

	case CPU_RM9000:

#endif

#ifdef CONFIG_SYS_HAS_CPU_SB1

	case CPU_SB1:

	case CPU_SB1A:

#endif

#ifdef CONFIG_SYS_HAS_CPU_CAVIUM_OCTEON

	case CPU_CAVIUM_OCTEON:

	case CPU_CAVIUM_OCTEON_PLUS:

	case CPU_CAVIUM_OCTEON2:

#endif



#ifdef CONFIG_SYS_HAS_CPU_BMIPS4380

	case CPU_BMIPS4380:

#endif



#ifdef CONFIG_SYS_HAS_CPU_BMIPS5000

	case CPU_BMIPS5000:

#endif



#ifdef CONFIG_SYS_HAS_CPU_XLP

	case CPU_XLP:

#endif



#ifdef CONFIG_SYS_HAS_CPU_XLR

	case CPU_XLR:

#endif

		break;

	default:

		unreachable();

	}



	return cpu_type;

}



static inline int __pure current_cpu_type(void)

{

	const int cpu_type = current_cpu_data.cputype;



	return __get_cpu_type(cpu_type);

}



static inline int __pure boot_cpu_type(void)

{

	const int cpu_type = cpu_data[0].cputype;



	return __get_cpu_type(cpu_type);

}



#endif /* __ASM_CPU_TYPE_H */

arch/mips/include/asm/mach-ip22/cpu-feature-overrides.h

+2 −0
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@@ -8,6 +8,8 @@ 
#ifndef __ASM_MACH_IP22_CPU_FEATURE_OVERRIDES_H

#define __ASM_MACH_IP22_CPU_FEATURE_OVERRIDES_H



#include <asm/cpu.h>



/*

 * IP22 with a variety of processors so we can't use defaults for everything.

 */