summaryrefslogtreecommitdiff
path: root/include/linux/rpmsg
diff options
context:
space:
mode:
authorMathieu Poirier <mathieu.poirier@linaro.org>2020-11-21 00:42:38 +0300
committerBjorn Andersson <bjorn.andersson@linaro.org>2020-11-24 19:10:59 +0300
commit6bef038011a023db41f1b33f0776224729d52344 (patch)
treeede449c07bc07854db7eadf5e446bb44f35edbcd /include/linux/rpmsg
parent3650b228f83adda7e5ee532e2b90429c03f7b9ec (diff)
downloadlinux-6bef038011a023db41f1b33f0776224729d52344.tar.xz
rpmsg: Introduce __rpmsg{16|32|64} types
Introduce __rpmsg{16|32|64} types along with byte order conversion functions based on an rpmsg_device operation as a foundation to make RPMSG modular and transport agnostic. Tested-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com> Suggested-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Reviewed-by: Arnaud Pouliquen <arnaud.pouliquen@st.com> Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com> Link: https://lore.kernel.org/r/20201120214245.172963-2-mathieu.poirier@linaro.org Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'include/linux/rpmsg')
-rw-r--r--include/linux/rpmsg/byteorder.h67
1 files changed, 67 insertions, 0 deletions
diff --git a/include/linux/rpmsg/byteorder.h b/include/linux/rpmsg/byteorder.h
new file mode 100644
index 000000000000..c0f565dbad6d
--- /dev/null
+++ b/include/linux/rpmsg/byteorder.h
@@ -0,0 +1,67 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Follows implementation found in linux/virtio_byteorder.h
+ */
+#ifndef _LINUX_RPMSG_BYTEORDER_H
+#define _LINUX_RPMSG_BYTEORDER_H
+#include <linux/types.h>
+#include <uapi/linux/rpmsg_types.h>
+
+static inline bool rpmsg_is_little_endian(void)
+{
+#ifdef __LITTLE_ENDIAN
+ return true;
+#else
+ return false;
+#endif
+}
+
+static inline u16 __rpmsg16_to_cpu(bool little_endian, __rpmsg16 val)
+{
+ if (little_endian)
+ return le16_to_cpu((__force __le16)val);
+ else
+ return be16_to_cpu((__force __be16)val);
+}
+
+static inline __rpmsg16 __cpu_to_rpmsg16(bool little_endian, u16 val)
+{
+ if (little_endian)
+ return (__force __rpmsg16)cpu_to_le16(val);
+ else
+ return (__force __rpmsg16)cpu_to_be16(val);
+}
+
+static inline u32 __rpmsg32_to_cpu(bool little_endian, __rpmsg32 val)
+{
+ if (little_endian)
+ return le32_to_cpu((__force __le32)val);
+ else
+ return be32_to_cpu((__force __be32)val);
+}
+
+static inline __rpmsg32 __cpu_to_rpmsg32(bool little_endian, u32 val)
+{
+ if (little_endian)
+ return (__force __rpmsg32)cpu_to_le32(val);
+ else
+ return (__force __rpmsg32)cpu_to_be32(val);
+}
+
+static inline u64 __rpmsg64_to_cpu(bool little_endian, __rpmsg64 val)
+{
+ if (little_endian)
+ return le64_to_cpu((__force __le64)val);
+ else
+ return be64_to_cpu((__force __be64)val);
+}
+
+static inline __rpmsg64 __cpu_to_rpmsg64(bool little_endian, u64 val)
+{
+ if (little_endian)
+ return (__force __rpmsg64)cpu_to_le64(val);
+ else
+ return (__force __rpmsg64)cpu_to_be64(val);
+}
+
+#endif /* _LINUX_RPMSG_BYTEORDER_H */