1 files changed, 56 insertions, 0 deletions
diff --git a/arch/alpha/kernel/termios.c b/arch/alpha/kernel/termios.c
new file mode 100644
index 000000000..a4c29a22e
--- /dev/null
+++ b/arch/alpha/kernel/termios.c
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/termios_internal.h>
+
+int user_termio_to_kernel_termios(struct ktermios *termios,
+						struct termio __user *termio)
+{
+	struct termio v;
+	bool canon;
+
+	if (copy_from_user(&v, termio, sizeof(struct termio)))
+		return -EFAULT;
+
+	termios->c_iflag = (0xffff0000 & termios->c_iflag) | v.c_iflag;
+	termios->c_oflag = (0xffff0000 & termios->c_oflag) | v.c_oflag;
+	termios->c_cflag = (0xffff0000 & termios->c_cflag) | v.c_cflag;
+	termios->c_lflag = (0xffff0000 & termios->c_lflag) | v.c_lflag;
+	termios->c_line = (0xffff0000 & termios->c_lflag) | v.c_line;
+
+	canon = v.c_lflag & ICANON;
+	termios->c_cc[VINTR]  = v.c_cc[_VINTR];
+	termios->c_cc[VQUIT]  = v.c_cc[_VQUIT];
+	termios->c_cc[VERASE] = v.c_cc[_VERASE];
+	termios->c_cc[VKILL]  = v.c_cc[_VKILL];
+	termios->c_cc[VEOL2]  = v.c_cc[_VEOL2];
+	termios->c_cc[VSWTC]  = v.c_cc[_VSWTC];
+	termios->c_cc[canon ? VEOF : VMIN]  = v.c_cc[_VEOF];
+	termios->c_cc[canon ? VEOL : VTIME] = v.c_cc[_VEOL];
+
+	return 0;
+}
+
+int kernel_termios_to_user_termio(struct termio __user *termio,
+						struct ktermios *termios)
+{
+	struct termio v;
+	bool canon;
+
+	memset(&v, 0, sizeof(struct termio));
+	v.c_iflag = termios->c_iflag;
+	v.c_oflag = termios->c_oflag;
+	v.c_cflag = termios->c_cflag;
+	v.c_lflag = termios->c_lflag;
+	v.c_line = termios->c_line;
+
+	canon = v.c_lflag & ICANON;
+	v.c_cc[_VINTR]  = termios->c_cc[VINTR];
+	v.c_cc[_VQUIT]  = termios->c_cc[VQUIT];
+	v.c_cc[_VERASE] = termios->c_cc[VERASE];
+	v.c_cc[_VKILL]  = termios->c_cc[VKILL];
+	v.c_cc[_VEOF]   = termios->c_cc[canon ? VEOF : VMIN];
+	v.c_cc[_VEOL]   = termios->c_cc[canon ? VEOL : VTIME];
+	v.c_cc[_VEOL2]  = termios->c_cc[VEOL2];
+	v.c_cc[_VSWTC]  = termios->c_cc[VSWTC];
+
+	return copy_to_user(termio, &v, sizeof(struct termio));
+}