summaryrefslogtreecommitdiffstats
path: root/kernel/arch/hexagon/lib/io.c
diff options
context:
space:
mode:
authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/hexagon/lib/io.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/hexagon/lib/io.c')
-rw-r--r--kernel/arch/hexagon/lib/io.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/kernel/arch/hexagon/lib/io.c b/kernel/arch/hexagon/lib/io.c
new file mode 100644
index 000000000..885c9626d
--- /dev/null
+++ b/kernel/arch/hexagon/lib/io.c
@@ -0,0 +1,91 @@
+/*
+ * I/O access functions for Hexagon
+ *
+ * Copyright (c) 2010-2011, 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.
+ *
+ * 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 <asm/io.h>
+
+/* These are all FIFO routines! */
+
+/*
+ * __raw_readsw - read words a short at a time
+ * @addr: source address
+ * @data: data address
+ * @len: number of shorts to read
+ */
+void __raw_readsw(const void __iomem *addr, void *data, int len)
+{
+ const volatile short int *src = (short int *) addr;
+ short int *dst = (short int *) data;
+
+ if ((u32)data & 0x1)
+ panic("unaligned pointer to readsw");
+
+ while (len-- > 0)
+ *dst++ = *src;
+
+}
+
+/*
+ * __raw_writesw - read words a short at a time
+ * @addr: source address
+ * @data: data address
+ * @len: number of shorts to read
+ */
+void __raw_writesw(void __iomem *addr, const void *data, int len)
+{
+ const short int *src = (short int *)data;
+ volatile short int *dst = (short int *)addr;
+
+ if ((u32)data & 0x1)
+ panic("unaligned pointer to writesw");
+
+ while (len-- > 0)
+ *dst = *src++;
+
+
+}
+
+/* Pretty sure len is pre-adjusted for the length of the access already */
+void __raw_readsl(const void __iomem *addr, void *data, int len)
+{
+ const volatile long *src = (long *) addr;
+ long *dst = (long *) data;
+
+ if ((u32)data & 0x3)
+ panic("unaligned pointer to readsl");
+
+ while (len-- > 0)
+ *dst++ = *src;
+
+
+}
+
+void __raw_writesl(void __iomem *addr, const void *data, int len)
+{
+ const long *src = (long *)data;
+ volatile long *dst = (long *)addr;
+
+ if ((u32)data & 0x3)
+ panic("unaligned pointer to writesl");
+
+ while (len-- > 0)
+ *dst = *src++;
+
+
+}