/* SPDX-License-Identifier: GPL-2.0 */// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. #include <linux/linkage.h>#include <abi/entry.h> .text /* * int csky_cmpxchg(int oldval, int newval, int *ptr) * * If *ptr != oldval && return 1, * else *ptr = newval return 0. */ENTRY(csky_cmpxchg)	USPTOKSP	mfcr	a3, epc	addi	a3, TRAP0_SIZE 	subi    sp, 16	stw     a3, (sp, 0)	mfcr    a3, epsr	stw     a3, (sp, 4)	mfcr	a3, usp	stw     a3, (sp, 8) 	psrset	ee#ifdef CONFIG_CPU_HAS_LDSTEX1:	ldex	a3, (a2)	cmpne	a0, a3	bt16	2f	mov	a3, a1	stex	a3, (a2)	bez	a3, 1b2:	sync.is#else1:	ldw	a3, (a2)	cmpne	a0, a3	bt16	3f2:	stw	a1, (a2)3:#endif	mvc	a0	ldw	a3, (sp, 0)	mtcr	a3, epc	ldw     a3, (sp, 4)	mtcr	a3, epsr	ldw     a3, (sp, 8)	mtcr	a3, usp	addi	sp, 16	KSPTOUSP	rteEND(csky_cmpxchg) #ifndef CONFIG_CPU_HAS_LDSTEX/* * Called from tlbmodified exception */ENTRY(csky_cmpxchg_fixup)	mfcr	a0, epc	lrw	a1, 2b	cmpne	a1, a0	bt	1f	subi	a1, (2b - 1b)	stw	a1, (sp, LSAVE_PC)1:	rtsEND(csky_cmpxchg_fixup)#endif