Add EIM HAL.

The eim and i2c support are copied from core/platform/novena.
In future, we should maybe build a library there, and link it here.

1 files changed, 52 insertions, 0 deletions

diff --git a/src/novena-eim.h b/src/novena-eim.h
new file mode 100644
index 0000000..75613bf
--- /dev/null
+++ b/src/novena-eim.h
@@ -0,0 +1,52 @@
+/* 
+ * novena-eim.h
+ * ------------
+ * This module contains the userland magic to set up and use the EIM bus.
+ *
+ * 
+ * Author: Pavel Shatov
+ * Copyright (c) 2014-2015, NORDUnet A/S All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * - Redistributions of source code must retain the above copyright notice,
+ *   this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * - Neither the name of the NORDUnet nor the names of its contributors may
+ *   be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define EIM_BASE_ADDR 0x08000000
+
+/* Set up EIM bus.
+ * Returns 0 on success, -1 on failure.
+ */
+int  eim_setup(void);
+
+/* Write a 32-bit word to EIM.
+ * If EIM is not set up correctly, this will abort with a bus error.
+ */
+void eim_write_32(off_t, uint32_t *);
+
+/* Read a 32-bit word from EIM.
+ * If EIM is not set up correctly, this will abort with a bus error.
+ */
+void eim_read_32(off_t, uint32_t *);