xref: /openbmc/linux/arch/csky/abiv2/inc/abi/fpu.h (revision 6607aa6f)
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)12 static 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