1 /* SPDX-License-Identifier: GPL-2.0 */
2 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
4 #ifndef __ASM_CSKY_FPU_H
5 #define __ASM_CSKY_FPU_H
7 #include <asm/sigcontext.h>
8 #include <asm/ptrace.h>
10 int fpu_libc_helper(struct pt_regs *regs);
11 void fpu_fpe(struct pt_regs *regs);
13 static inline void init_fpu(void) { mtcr("cr<1, 2>", 0); }
15 void save_to_user_fp(struct user_fp *user_fp);
16 void restore_from_user_fp(struct user_fp *user_fp);
19 * Define the fesr bit for fpe handle.
21 #define FPE_ILLE (1 << 16) /* Illegal instruction */
22 #define FPE_FEC (1 << 7) /* Input float-point arithmetic exception */
23 #define FPE_IDC (1 << 5) /* Input denormalized exception */
24 #define FPE_IXC (1 << 4) /* Inexact exception */
25 #define FPE_UFC (1 << 3) /* Underflow exception */
26 #define FPE_OFC (1 << 2) /* Overflow exception */
27 #define FPE_DZC (1 << 1) /* Divide by zero exception */
28 #define FPE_IOC (1 << 0) /* Invalid operation exception */
29 #define FPE_REGULAR_EXCEPTION (FPE_IXC | FPE_UFC | FPE_OFC | FPE_DZC | FPE_IOC)
31 #ifdef CONFIG_OPEN_FPU_IDE
32 #define IDE_STAT (1 << 5)
37 #ifdef CONFIG_OPEN_FPU_IXE
38 #define IXE_STAT (1 << 4)
43 #ifdef CONFIG_OPEN_FPU_UFE
44 #define UFE_STAT (1 << 3)
49 #ifdef CONFIG_OPEN_FPU_OFE
50 #define OFE_STAT (1 << 2)
55 #ifdef CONFIG_OPEN_FPU_DZE
56 #define DZE_STAT (1 << 1)
61 #ifdef CONFIG_OPEN_FPU_IOE
62 #define IOE_STAT (1 << 0)
67 #endif /* __ASM_CSKY_FPU_H */