/* SPDX-License-Identifier: GPL-2.0-only *//* * Copyright (C) 2020 Synopsys, Inc. (www.synopsys.com) * * Author: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> */#ifndef __ASM_ARC_DSP_IMPL_H#define __ASM_ARC_DSP_IMPL_H #include <asm/dsp.h> #define DSP_CTRL_DISABLED_ALL		0 #ifdef __ASSEMBLER__ /* clobbers r5 register */.macro DSP_EARLY_INIT#ifdef CONFIG_ISA_ARCV2	lr	r5, [ARC_AUX_DSP_BUILD]	bmsk	r5, r5, 7	breq    r5, 0, 1f	mov	r5, DSP_CTRL_DISABLED_ALL	sr	r5, [ARC_AUX_DSP_CTRL]1:#endif.endm /* clobbers r10, r11 registers pair */.macro DSP_SAVE_REGFILE_IRQ#if defined(CONFIG_ARC_DSP_KERNEL)	/*	 * Drop any changes to DSP_CTRL made by userspace so userspace won't be	 * able to break kernel - reset it to DSP_CTRL_DISABLED_ALL value	 */	mov	r10, DSP_CTRL_DISABLED_ALL	sr	r10, [ARC_AUX_DSP_CTRL] #elif defined(CONFIG_ARC_DSP_SAVE_RESTORE_REGS)	/*	 * Save DSP_CTRL register and reset it to value suitable for kernel	 * (DSP_CTRL_DISABLED_ALL)	 */	mov	r10, DSP_CTRL_DISABLED_ALL	aex	r10, [ARC_AUX_DSP_CTRL]	st	r10, [sp, PT_DSP_CTRL] #endif.endm /* clobbers r10, r11 registers pair */.macro DSP_RESTORE_REGFILE_IRQ#if defined(CONFIG_ARC_DSP_SAVE_RESTORE_REGS)	ld	r10, [sp, PT_DSP_CTRL]	sr	r10, [ARC_AUX_DSP_CTRL] #endif.endm #else /* __ASEMBLY__ */ #include <linux/sched.h>#include <asm/asserts.h>#include <asm/switch_to.h> #ifdef CONFIG_ARC_DSP_SAVE_RESTORE_REGS /* * As we save new and restore old AUX register value in the same place we * can optimize a bit and use AEX instruction (swap contents of an auxiliary * register with a core register) instead of LR + SR pair. */#define AUX_SAVE_RESTORE(_saveto, _readfrom, _offt, _aux)		\do {									\	long unsigned int _scratch;					\									\	__asm__ __volatile__(						\		"ld	%0, [%2, %4]			\n"		\		"aex	%0, [%3]			\n"		\		"st	%0, [%1, %4]			\n"		\		:							\		  "=&r" (_scratch)	/* must be early clobber */	\		:							\		   "r" (_saveto),					\		   "r" (_readfrom),					\		   "Ir" (_aux),						\		   "Ir" (_offt)						\		:							\		  "memory"						\	);								\} while (0) #define DSP_AUX_SAVE_RESTORE(_saveto, _readfrom, _aux)			\	AUX_SAVE_RESTORE(_saveto, _readfrom,				\		offsetof(struct dsp_callee_regs, _aux),			\		ARC_AUX_##_aux) static inline void dsp_save_restore(struct task_struct *prev,					struct task_struct *next){	long unsigned int *saveto = &prev->thread.dsp.ACC0_GLO;	long unsigned int *readfrom = &next->thread.dsp.ACC0_GLO; 	DSP_AUX_SAVE_RESTORE(saveto, readfrom, ACC0_GLO);	DSP_AUX_SAVE_RESTORE(saveto, readfrom, ACC0_GHI); 	DSP_AUX_SAVE_RESTORE(saveto, readfrom, DSP_BFLY0);	DSP_AUX_SAVE_RESTORE(saveto, readfrom, DSP_FFT_CTRL); #ifdef CONFIG_ARC_DSP_AGU_USERSPACE	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_AP0);	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_AP1);	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_AP2);	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_AP3); 	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_OS0);	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_OS1); 	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_MOD0);	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_MOD1);	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_MOD2);	DSP_AUX_SAVE_RESTORE(saveto, readfrom, AGU_MOD3);#endif /* CONFIG_ARC_DSP_AGU_USERSPACE */} #else /* !CONFIG_ARC_DSP_SAVE_RESTORE_REGS */#define dsp_save_restore(p, n)#endif /* CONFIG_ARC_DSP_SAVE_RESTORE_REGS */ static inline bool dsp_exist(void){	struct bcr_generic bcr; 	READ_BCR(ARC_AUX_DSP_BUILD, bcr);	return !!bcr.ver;} static inline bool agu_exist(void){	struct bcr_generic bcr; 	READ_BCR(ARC_AUX_AGU_BUILD, bcr);	return !!bcr.ver;} static inline void dsp_config_check(void){	CHK_OPT_STRICT(CONFIG_ARC_DSP_HANDLED, dsp_exist());	CHK_OPT_WEAK(CONFIG_ARC_DSP_AGU_USERSPACE, agu_exist());} #endif /* __ASEMBLY__ */#endif /* __ASM_ARC_DSP_IMPL_H */