ARM: tty: Move HVC DCC assembly to arch/arm

Put architecture-specific assembly code where it belongs,
allowing for support of additional architectures such as arm64 in
the future.

Signed-off-by: Christopher Covington <cov@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/arm/include/asm/dcc.h b/arch/arm/include/asm/dcc.h
new file mode 100644 (file)
index 0000000..b74899d
--- /dev/null
+++ b/arch/arm/include/asm/dcc.h
@@ -0,0 +1,41 @@
+/* Copyright (c) 2010, 2014 The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <asm/barrier.h>
+
+static inline u32 __dcc_getstatus(void)
+{
+       u32 __ret;
+       asm volatile("mrc p14, 0, %0, c0, c1, 0 @ read comms ctrl reg"
+               : "=r" (__ret) : : "cc");
+
+       return __ret;
+}
+
+static inline char __dcc_getchar(void)
+{
+       char __c;
+
+       asm volatile("mrc p14, 0, %0, c0, c5, 0 @ read comms data reg"
+               : "=r" (__c));
+       isb();
+
+       return __c;
+}
+
+static inline void __dcc_putchar(char c)
+{
+       asm volatile("mcr p14, 0, %0, c0, c5, 0 @ write a char"
+               : /* no output register */
+               : "r" (c));
+       isb();
+}

diff --git a/drivers/tty/hvc/hvc_dcc.c b/drivers/tty/hvc/hvc_dcc.c
index 3502a7b..809920d 100644 (file)
--- a/drivers/tty/hvc/hvc_dcc.c
+++ b/drivers/tty/hvc/hvc_dcc.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
+/* Copyright (c) 2010, 2014 The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -8,20 +8,11 @@
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
  */
 
-#include <linux/console.h>
-#include <linux/delay.h>
-#include <linux/err.h>
 #include <linux/init.h>
-#include <linux/moduleparam.h>
-#include <linux/types.h>
 
+#include <asm/dcc.h>
 #include <asm/processor.h>
 
 #include "hvc_console.h"
@@ -30,35 +21,6 @@
 #define DCC_STATUS_RX          (1 << 30)
 #define DCC_STATUS_TX          (1 << 29)
 
-static inline u32 __dcc_getstatus(void)
-{
-       u32 __ret;
-       asm volatile("mrc p14, 0, %0, c0, c1, 0 @ read comms ctrl reg"
-               : "=r" (__ret) : : "cc");
-
-       return __ret;
-}
-
-
-static inline char __dcc_getchar(void)
-{
-       char __c;
-
-       asm volatile("mrc p14, 0, %0, c0, c5, 0 @ read comms data reg"
-               : "=r" (__c));
-       isb();
-
-       return __c;
-}
-
-static inline void __dcc_putchar(char c)
-{
-       asm volatile("mcr p14, 0, %0, c0, c5, 0 @ write a char"
-               : /* no output register */
-               : "r" (c));
-       isb();
-}
-
 static int hvc_dcc_put_chars(uint32_t vt, const char *buf, int count)
 {
        int i;