1 /* SPDX-License-Identifier: GPL-2.0 */ 2 3 #ifndef __ASM_CSKY_FPU_H 4 #define __ASM_CSKY_FPU_H 5 6 #include <asm/sigcontext.h> 7 #include <asm/ptrace.h> 8 9 int fpu_libc_helper(struct pt_regs *regs); 10 void fpu_fpe(struct pt_regs *regs); 11 init_fpu(void)12static inline void init_fpu(void) { mtcr("cr<1, 2>", 0); } 13 14 void save_to_user_fp(struct user_fp *user_fp); 15 void restore_from_user_fp(struct user_fp *user_fp); 16 17 /* 18 * Define the fesr bit for fpe handle. 19 */ 20 #define FPE_ILLE (1 << 16) /* Illegal instruction */ 21 #define FPE_FEC (1 << 7) /* Input float-point arithmetic exception */ 22 #define FPE_IDC (1 << 5) /* Input denormalized exception */ 23 #define FPE_IXC (1 << 4) /* Inexact exception */ 24 #define FPE_UFC (1 << 3) /* Underflow exception */ 25 #define FPE_OFC (1 << 2) /* Overflow exception */ 26 #define FPE_DZC (1 << 1) /* Divide by zero exception */ 27 #define FPE_IOC (1 << 0) /* Invalid operation exception */ 28 #define FPE_REGULAR_EXCEPTION (FPE_IXC | FPE_UFC | FPE_OFC | FPE_DZC | FPE_IOC) 29 30 #ifdef CONFIG_OPEN_FPU_IDE 31 #define IDE_STAT (1 << 5) 32 #else 33 #define IDE_STAT 0 34 #endif 35 36 #ifdef CONFIG_OPEN_FPU_IXE 37 #define IXE_STAT (1 << 4) 38 #else 39 #define IXE_STAT 0 40 #endif 41 42 #ifdef CONFIG_OPEN_FPU_UFE 43 #define UFE_STAT (1 << 3) 44 #else 45 #define UFE_STAT 0 46 #endif 47 48 #ifdef CONFIG_OPEN_FPU_OFE 49 #define OFE_STAT (1 << 2) 50 #else 51 #define OFE_STAT 0 52 #endif 53 54 #ifdef CONFIG_OPEN_FPU_DZE 55 #define DZE_STAT (1 << 1) 56 #else 57 #define DZE_STAT 0 58 #endif 59 60 #ifdef CONFIG_OPEN_FPU_IOE 61 #define IOE_STAT (1 << 0) 62 #else 63 #define IOE_STAT 0 64 #endif 65 66 #endif /* __ASM_CSKY_FPU_H */ 67