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| author | Hendrik Brueckner <brueckner@linux.vnet.ibm.com> | 2015-10-06 13:25:59 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-10-16 10:41:12 +0300 |
| commit | b0753902d42f5cb01c33f0dec47ba2aa7ecfbb3f (patch) | |
| tree | ac0e87193afb0bfdfbae51fca2f67288849fd071 /arch/s390/include/asm/fpu/api.h | |
| parent | 6933c35a307cad0b8b847042346dde68866d3d2a (diff) | |
| download | linux-b0753902d42f5cb01c33f0dec47ba2aa7ecfbb3f.tar.xz | |
s390/fpu: split fpu-internal.h into fpu internals, api, and type headers
Split the API and FPU type definitions into separate header files
similar to "x86/fpu: Rename fpu-internal.h to fpu/internal.h" (78f7f1e54b).
The new header files and their meaning are:
asm/fpu/types.h:
FPU related data types, needed for 'struct thread_struct' and
'struct task_struct'.
asm/fpu/api.h:
FPU related 'public' functions for other subsystems and device
drivers.
asm/fpu/internal.h:
FPU internal functions mainly used to convert
FPU register contents in signal handling.
Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/fpu/api.h')
| -rw-r--r-- | arch/s390/include/asm/fpu/api.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/s390/include/asm/fpu/api.h b/arch/s390/include/asm/fpu/api.h new file mode 100644 index 000000000000..5e04f3cbd320 --- /dev/null +++ b/arch/s390/include/asm/fpu/api.h @@ -0,0 +1,30 @@ +/* + * In-kernel FPU support functions + * + * Copyright IBM Corp. 2015 + * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com> + */ + +#ifndef _ASM_S390_FPU_API_H +#define _ASM_S390_FPU_API_H + +void save_fpu_regs(void); + +static inline int test_fp_ctl(u32 fpc) +{ + u32 orig_fpc; + int rc; + + asm volatile( + " efpc %1\n" + " sfpc %2\n" + "0: sfpc %1\n" + " la %0,0\n" + "1:\n" + EX_TABLE(0b,1b) + : "=d" (rc), "=d" (orig_fpc) + : "d" (fpc), "0" (-EINVAL)); + return rc; +} + +#endif /* _ASM_S390_FPU_API_H */ |