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 	KSTK_STATUS(current) |= ST0_CU1;  in __own_fpu()
133 	if (mode == FPU_64BIT || mode == FPU_HYBRID)  in __own_fpu()
134 		KSTK_STATUS(current) |= ST0_FR;  in __own_fpu()
135 	else /* mode == FPU_32BIT */  in __own_fpu()
136 		KSTK_STATUS(current) &= ~ST0_FR;  in __own_fpu()
149 			_restore_fp(current);  in own_fpu_inatomic()
169 			tsk->thread.fpu.fcr31 =  in lose_fpu_inatomic()
191 	lose_fpu_inatomic(save, current);  in lose_fpu()
196  * init_fp_ctx() - Initialize task FP context
213 	memset(&target->thread.fpu.fpr, ~0, sizeof(target->thread.fpu.fpr));  in init_fp_ctx()
241 	if (tsk == current) {  in get_fpu_regs()
244 			_save_fp(current);  in get_fpu_regs()
248 	return tsk->thread.fpu.fpr;  in get_fpu_regs()
258 static inline int __enable_fpu(enum fpu_mode mode)  in __enable_fpu()  argument
265 	/* no-op */  in __disable_fpu()
276 	/* no-op */  in clear_fpu_owner()
291 	/* no-op */  in lose_fpu_inatomic()
296 	/* no-op */  in lose_fpu()