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Diffstat (limited to 'arch/s390/include/asm/fpu/api.h')
-rw-r--r--arch/s390/include/asm/fpu/api.h30
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 */