diff options
Diffstat (limited to 'arch/nds32/include/uapi/asm')
| -rw-r--r-- | arch/nds32/include/uapi/asm/auxvec.h | 7 | ||||
| -rw-r--r-- | arch/nds32/include/uapi/asm/sigcontext.h | 14 | ||||
| -rw-r--r-- | arch/nds32/include/uapi/asm/udftrap.h | 13 | ||||
| -rw-r--r-- | arch/nds32/include/uapi/asm/unistd.h | 2 |
4 files changed, 36 insertions, 0 deletions
diff --git a/arch/nds32/include/uapi/asm/auxvec.h b/arch/nds32/include/uapi/asm/auxvec.h index 56043ce4972f..2d3213f5e595 100644 --- a/arch/nds32/include/uapi/asm/auxvec.h +++ b/arch/nds32/include/uapi/asm/auxvec.h @@ -4,6 +4,13 @@ #ifndef __ASM_AUXVEC_H #define __ASM_AUXVEC_H +/* + * This entry gives some information about the FPU initialization + * performed by the kernel. + */ +#define AT_FPUCW 18 /* Used FPU control word. */ + + /* VDSO location */ #define AT_SYSINFO_EHDR 33 diff --git a/arch/nds32/include/uapi/asm/sigcontext.h b/arch/nds32/include/uapi/asm/sigcontext.h index 00567b237b0c..58afc416473e 100644 --- a/arch/nds32/include/uapi/asm/sigcontext.h +++ b/arch/nds32/include/uapi/asm/sigcontext.h @@ -9,6 +9,19 @@ * before the signal handler was invoked. Note: only add new entries * to the end of the structure. */ +struct fpu_struct { + unsigned long long fd_regs[32]; + unsigned long fpcsr; + /* + * UDF_trap is used to recognize whether underflow trap is enabled + * or not. When UDF_trap == 1, this process will be traped and then + * get a SIGFPE signal when encountering an underflow exception. + * UDF_trap is only modified through setfputrap syscall. Therefore, + * UDF_trap needn't be saved or loaded to context in each context + * switch. + */ + unsigned long UDF_trap; +}; struct zol_struct { unsigned long nds32_lc; /* $LC */ @@ -54,6 +67,7 @@ struct sigcontext { unsigned long fault_address; unsigned long used_math_flag; /* FPU Registers */ + struct fpu_struct fpu; struct zol_struct zol; }; diff --git a/arch/nds32/include/uapi/asm/udftrap.h b/arch/nds32/include/uapi/asm/udftrap.h new file mode 100644 index 000000000000..433f79d679c0 --- /dev/null +++ b/arch/nds32/include/uapi/asm/udftrap.h @@ -0,0 +1,13 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (C) 2005-2018 Andes Technology Corporation */ +#ifndef _ASM_SETFPUTRAP +#define _ASM_SETFPUTRAP + +/* + * Options for setfputrap system call + */ +#define DISABLE_UDFTRAP 0 /* disable underflow exception trap */ +#define ENABLE_UDFTRAP 1 /* enable undeflos exception trap */ +#define GET_UDFTRAP 2 /* only get undeflos exception trap status */ + +#endif /* _ASM_CACHECTL */ diff --git a/arch/nds32/include/uapi/asm/unistd.h b/arch/nds32/include/uapi/asm/unistd.h index 603e826e0449..c2c3a3e34083 100644 --- a/arch/nds32/include/uapi/asm/unistd.h +++ b/arch/nds32/include/uapi/asm/unistd.h @@ -9,4 +9,6 @@ /* Additional NDS32 specific syscalls. */ #define __NR_cacheflush (__NR_arch_specific_syscall) +#define __NR_udftrap (__NR_arch_specific_syscall + 1) __SYSCALL(__NR_cacheflush, sys_cacheflush) +__SYSCALL(__NR_udftrap, sys_udftrap) |