Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #ifndef __ASM_SH_FPU_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #define __ASM_SH_FPU_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #ifndef __ASSEMBLY__
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <asm/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) struct task_struct;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #ifdef CONFIG_SH_FPU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) static inline void release_fpu(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	regs->sr |= SR_FD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) static inline void grab_fpu(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	regs->sr &= ~SR_FD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) extern void save_fpu(struct task_struct *__tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) extern void restore_fpu(struct task_struct *__tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) extern void fpu_state_restore(struct pt_regs *regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) extern void __fpu_state_restore(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define save_fpu(tsk)			do { } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define restore_fpu(tsk)		do { } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define release_fpu(regs)		do { } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define grab_fpu(regs)			do { } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define fpu_state_restore(regs)		do { } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define __fpu_state_restore(regs)	do { } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct user_regset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) extern int do_fpu_inst(unsigned short, struct pt_regs *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) extern int init_fpu(struct task_struct *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static inline void __unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	if (task_thread_info(tsk)->status & TS_USEDFPU) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 		task_thread_info(tsk)->status &= ~TS_USEDFPU;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		save_fpu(tsk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		release_fpu(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 		tsk->thread.fpu_counter = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static inline void unlazy_fpu(struct task_struct *tsk, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	preempt_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	__unlazy_fpu(tsk, regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	preempt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) static inline void clear_fpu(struct task_struct *tsk, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	preempt_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	if (task_thread_info(tsk)->status & TS_USEDFPU) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 		task_thread_info(tsk)->status &= ~TS_USEDFPU;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 		release_fpu(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	preempt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #endif /* __ASSEMBLY__ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) #endif /* __ASM_SH_FPU_H */