/* SPDX-License-Identifier: GPL-2.0-only *//* *  linux/arch/arm/lib/delay.S * *  Copyright (C) 1995, 1996 Russell King */#include <linux/linkage.h>#include <linux/cfi_types.h>#include <asm/assembler.h>#include <asm/delay.h> #ifdef CONFIG_ARCH_RPC		.arch	armv4#endif 		.text .LC0:		.word	loops_per_jiffy.LC1:		.word	UDELAY_MULT /* * loops = r0 * HZ * loops_per_jiffy / 1000000 * * r0  <= 2000 * HZ  <= 1000 */ SYM_TYPED_FUNC_START(__loop_udelay)		ldr	r2, .LC1		mul	r0, r2, r0		@ r0 = delay_us * UDELAY_MULT		b	__loop_const_udelaySYM_FUNC_END(__loop_udelay) SYM_TYPED_FUNC_START(__loop_const_udelay)	@ 0 <= r0 <= 0xfffffaf0		ldr	r2, .LC0		ldr	r2, [r2]		umull	r1, r0, r2, r0		@ r0-r1 = r0 * loops_per_jiffy		adds	r1, r1, #0xffffffff	@ rounding up ...		adcs	r0, r0, r0		@ and right shift by 31		reteq	lr		b	__loop_delaySYM_FUNC_END(__loop_const_udelay) 		.align 3 @ Delay routineSYM_TYPED_FUNC_START(__loop_delay)		subs	r0, r0, #1#if 0		retls	lr		subs	r0, r0, #1		retls	lr		subs	r0, r0, #1		retls	lr		subs	r0, r0, #1		retls	lr		subs	r0, r0, #1		retls	lr		subs	r0, r0, #1		retls	lr		subs	r0, r0, #1		retls	lr		subs	r0, r0, #1#endif		bhi	__loop_delay		ret	lrSYM_FUNC_END(__loop_delay)