1 /* SPDX-License-Identifier: GPL-2.0-or-later */
17 #include <asm/cpu-features.h>
22 #include <asm/current.h>
30  * This enum specifies a mode in which we want the FPU to operate, for cores
54 static inline int __enable_fpu(enum fpu_mode mode)  in __enable_fpu()  argument
58 	switch (mode) {  in __enable_fpu()
60 		/* just enable the FPU in its current mode */  in __enable_fpu()
76 		/* we only have a 32-bit FPU */  in __enable_fpu()
87 		fr = (int)mode & FPU_FR_MASK;  in __enable_fpu()
120 	enum fpu_mode mode;  in __own_fpu()  local
124 		mode = FPU_HYBRID;  in __own_fpu()
126 		mode = !test_thread_flag(TIF_32BIT_FPREGS);  in __own_fpu()
128 	ret = __enable_fpu(mode);  in __own_fpu()
132 	if (current->thread.fpu.fcr31 & FPU_CSR_NAN2008) {  in __own_fpu()
144 	KSTK_STATUS(current) |= ST0_CU1;  in __own_fpu()
145 	if (mode == FPU_64BIT || mode == FPU_HYBRID)  in __own_fpu()
146 		KSTK_STATUS(current) |= ST0_FR;  in __own_fpu()
147 	else /* mode == FPU_32BIT */  in __own_fpu()
148 		KSTK_STATUS(current) &= ~ST0_FR;  in __own_fpu()
164 			_restore_fp(current);  in own_fpu_inatomic()
184 			tsk->thread.fpu.fcr31 =  in lose_fpu_inatomic()
206 	lose_fpu_inatomic(save, current);  in lose_fpu()
211  * init_fp_ctx() - Initialize task FP context
228 	memset(&target->thread.fpu.fpr, ~0, sizeof(target->thread.fpu.fpr));  in init_fp_ctx()
256 	if (tsk == current) {  in get_fpu_regs()
259 			_save_fp(current);  in get_fpu_regs()
263 	return tsk->thread.fpu.fpr;  in get_fpu_regs()
273 static inline int __enable_fpu(enum fpu_mode mode)  in __enable_fpu()  argument
280 	/* no-op */  in __disable_fpu()
291 	/* no-op */  in clear_fpu_owner()
306 	/* no-op */  in lose_fpu_inatomic()
311 	/* no-op */  in lose_fpu()