Commit a5203c4c authored by Paul Bolle's avatar Paul Bolle Committed by Russell King
Browse files

ARM: 7460/1: remove asm/locks.h 



Commit 64ac24e7 ("Generic semaphore
implementation") removed the last include of this header. Apparently it
was just an oversight to keep this header. It can safely be removed now.

Acked-by: default avatarWill Deacon <will.deacon@arm.com>
Signed-off-by: default avatarPaul Bolle <pebolle@tiscali.nl>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 9fa16b77

arch/arm/include/asm/locks.h

deleted100644 → 0
+0 −274
Original line number Diff line number Diff line 
/*

 *  arch/arm/include/asm/locks.h

 *

 *  Copyright (C) 2000 Russell King

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 *  Interrupt safe locking assembler. 

 */

#ifndef __ASM_PROC_LOCKS_H

#define __ASM_PROC_LOCKS_H



#if __LINUX_ARM_ARCH__ >= 6



#define __down_op(ptr,fail)			\

	({					\

	__asm__ __volatile__(			\

	"@ down_op\n"				\

"1:	ldrex	lr, [%0]\n"			\

"	sub	lr, lr, %1\n"			\

"	strex	ip, lr, [%0]\n"			\

"	teq	ip, #0\n"			\

"	bne	1b\n"				\

"	teq	lr, #0\n"			\

"	movmi	ip, %0\n"			\

"	blmi	" #fail				\

	:					\

	: "r" (ptr), "I" (1)			\

	: "ip", "lr", "cc");			\

	smp_mb();				\

	})



#define __down_op_ret(ptr,fail)			\

	({					\

		unsigned int ret;		\

	__asm__ __volatile__(			\

	"@ down_op_ret\n"			\

"1:	ldrex	lr, [%1]\n"			\

"	sub	lr, lr, %2\n"			\

"	strex	ip, lr, [%1]\n"			\

"	teq	ip, #0\n"			\

"	bne	1b\n"				\

"	teq	lr, #0\n"			\

"	movmi	ip, %1\n"			\

"	movpl	ip, #0\n"			\

"	blmi	" #fail "\n"			\

"	mov	%0, ip"				\

	: "=&r" (ret)				\

	: "r" (ptr), "I" (1)			\

	: "ip", "lr", "cc");			\

	smp_mb();				\

	ret;					\

	})



#define __up_op(ptr,wake)			\

	({					\

	smp_mb();				\

	__asm__ __volatile__(			\

	"@ up_op\n"				\

"1:	ldrex	lr, [%0]\n"			\

"	add	lr, lr, %1\n"			\

"	strex	ip, lr, [%0]\n"			\

"	teq	ip, #0\n"			\

"	bne	1b\n"				\

"	cmp	lr, #0\n"			\

"	movle	ip, %0\n"			\

"	blle	" #wake				\

	:					\

	: "r" (ptr), "I" (1)			\

	: "ip", "lr", "cc");			\

	})



/*

 * The value 0x01000000 supports up to 128 processors and

 * lots of processes.  BIAS must be chosen such that sub'ing

 * BIAS once per CPU will result in the long remaining

 * negative.

 */

#define RW_LOCK_BIAS      0x01000000

#define RW_LOCK_BIAS_STR "0x01000000"



#define __down_op_write(ptr,fail)		\

	({					\

	__asm__ __volatile__(			\

	"@ down_op_write\n"			\

"1:	ldrex	lr, [%0]\n"			\

"	sub	lr, lr, %1\n"			\

"	strex	ip, lr, [%0]\n"			\

"	teq	ip, #0\n"			\

"	bne	1b\n"				\

"	teq	lr, #0\n"			\

"	movne	ip, %0\n"			\

"	blne	" #fail				\

	:					\

	: "r" (ptr), "I" (RW_LOCK_BIAS)		\

	: "ip", "lr", "cc");			\

	smp_mb();				\

	})



#define __up_op_write(ptr,wake)			\

	({					\

	smp_mb();				\

	__asm__ __volatile__(			\

	"@ up_op_write\n"			\

"1:	ldrex	lr, [%0]\n"			\

"	adds	lr, lr, %1\n"			\

"	strex	ip, lr, [%0]\n"			\

"	teq	ip, #0\n"			\

"	bne	1b\n"				\

"	movcs	ip, %0\n"			\

"	blcs	" #wake				\

	:					\

	: "r" (ptr), "I" (RW_LOCK_BIAS)		\

	: "ip", "lr", "cc");			\

	})



#define __down_op_read(ptr,fail)		\

	__down_op(ptr, fail)



#define __up_op_read(ptr,wake)			\

	({					\

	smp_mb();				\

	__asm__ __volatile__(			\

	"@ up_op_read\n"			\

"1:	ldrex	lr, [%0]\n"			\

"	add	lr, lr, %1\n"			\

"	strex	ip, lr, [%0]\n"			\

"	teq	ip, #0\n"			\

"	bne	1b\n"				\

"	teq	lr, #0\n"			\

"	moveq	ip, %0\n"			\

"	bleq	" #wake				\

	:					\

	: "r" (ptr), "I" (1)			\

	: "ip", "lr", "cc");			\

	})



#else



#define __down_op(ptr,fail)			\

	({					\

	__asm__ __volatile__(			\

	"@ down_op\n"				\

"	mrs	ip, cpsr\n"			\

"	orr	lr, ip, #128\n"			\

"	msr	cpsr_c, lr\n"			\

"	ldr	lr, [%0]\n"			\

"	subs	lr, lr, %1\n"			\

"	str	lr, [%0]\n"			\

"	msr	cpsr_c, ip\n"			\

"	movmi	ip, %0\n"			\

"	blmi	" #fail				\

	:					\

	: "r" (ptr), "I" (1)			\

	: "ip", "lr", "cc");			\

	smp_mb();				\

	})



#define __down_op_ret(ptr,fail)			\

	({					\

		unsigned int ret;		\

	__asm__ __volatile__(			\

	"@ down_op_ret\n"			\

"	mrs	ip, cpsr\n"			\

"	orr	lr, ip, #128\n"			\

"	msr	cpsr_c, lr\n"			\

"	ldr	lr, [%1]\n"			\

"	subs	lr, lr, %2\n"			\

"	str	lr, [%1]\n"			\

"	msr	cpsr_c, ip\n"			\

"	movmi	ip, %1\n"			\

"	movpl	ip, #0\n"			\

"	blmi	" #fail "\n"			\

"	mov	%0, ip"				\

	: "=&r" (ret)				\

	: "r" (ptr), "I" (1)			\

	: "ip", "lr", "cc");			\

	smp_mb();				\

	ret;					\

	})



#define __up_op(ptr,wake)			\

	({					\

	smp_mb();				\

	__asm__ __volatile__(			\

	"@ up_op\n"				\

"	mrs	ip, cpsr\n"			\

"	orr	lr, ip, #128\n"			\

"	msr	cpsr_c, lr\n"			\

"	ldr	lr, [%0]\n"			\

"	adds	lr, lr, %1\n"			\

"	str	lr, [%0]\n"			\

"	msr	cpsr_c, ip\n"			\

"	movle	ip, %0\n"			\

"	blle	" #wake				\

	:					\

	: "r" (ptr), "I" (1)			\

	: "ip", "lr", "cc");			\

	})



/*

 * The value 0x01000000 supports up to 128 processors and

 * lots of processes.  BIAS must be chosen such that sub'ing

 * BIAS once per CPU will result in the long remaining

 * negative.

 */

#define RW_LOCK_BIAS      0x01000000

#define RW_LOCK_BIAS_STR "0x01000000"



#define __down_op_write(ptr,fail)		\

	({					\

	__asm__ __volatile__(			\

	"@ down_op_write\n"			\

"	mrs	ip, cpsr\n"			\

"	orr	lr, ip, #128\n"			\

"	msr	cpsr_c, lr\n"			\

"	ldr	lr, [%0]\n"			\

"	subs	lr, lr, %1\n"			\

"	str	lr, [%0]\n"			\

"	msr	cpsr_c, ip\n"			\

"	movne	ip, %0\n"			\

"	blne	" #fail				\

	:					\

	: "r" (ptr), "I" (RW_LOCK_BIAS)		\

	: "ip", "lr", "cc");			\

	smp_mb();				\

	})



#define __up_op_write(ptr,wake)			\

	({					\

	__asm__ __volatile__(			\

	"@ up_op_write\n"			\

"	mrs	ip, cpsr\n"			\

"	orr	lr, ip, #128\n"			\

"	msr	cpsr_c, lr\n"			\

"	ldr	lr, [%0]\n"			\

"	adds	lr, lr, %1\n"			\

"	str	lr, [%0]\n"			\

"	msr	cpsr_c, ip\n"			\

"	movcs	ip, %0\n"			\

"	blcs	" #wake				\

	:					\

	: "r" (ptr), "I" (RW_LOCK_BIAS)		\

	: "ip", "lr", "cc");			\

	smp_mb();				\

	})



#define __down_op_read(ptr,fail)		\

	__down_op(ptr, fail)



#define __up_op_read(ptr,wake)			\

	({					\

	smp_mb();				\

	__asm__ __volatile__(			\

	"@ up_op_read\n"			\

"	mrs	ip, cpsr\n"			\

"	orr	lr, ip, #128\n"			\

"	msr	cpsr_c, lr\n"			\

"	ldr	lr, [%0]\n"			\

"	adds	lr, lr, %1\n"			\

"	str	lr, [%0]\n"			\

"	msr	cpsr_c, ip\n"			\

"	moveq	ip, %0\n"			\

"	bleq	" #wake				\

	:					\

	: "r" (ptr), "I" (1)			\

	: "ip", "lr", "cc");			\

	})



#endif



#endif

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