Add code to access P9 CFAM registers
Change-Id: Idd98d016f0d6a246b516b4850e887991c771ae16
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
diff --git a/cfam_access.hpp b/cfam_access.hpp
new file mode 100644
index 0000000..88dcc77
--- /dev/null
+++ b/cfam_access.hpp
@@ -0,0 +1,65 @@
+#pragma once
+
+#include <memory>
+#include "targeting.hpp"
+
+namespace openpower
+{
+namespace cfam
+{
+namespace access
+{
+
+using cfam_address_t = uint16_t;
+using cfam_data_t = uint32_t;
+using cfam_mask_t = uint32_t;
+
+/**
+ * @brief Writes a CFAM (Common FRU Access Macro) register in a P9.
+ *
+ * Throws an exception on error.
+ *
+ * @param[in] target - The Target to perform the operation on
+ * @param[in] address - The register address to write to
+ * @param[in] data - The data to write
+ */
+void writeReg(const std::unique_ptr<openpower::targeting::Target>& target,
+ cfam_address_t address,
+ cfam_data_t data);
+
+
+/**
+ * @brief Reads a CFAM (Common FRU Access Macro) register in a P9.
+ *
+ * Throws an exception on error.
+ *
+ * @param[in] target - The Target to perform the operation on
+ * @param[in] address - The register address to read
+ * @return - The register data
+ */
+cfam_data_t readReg(
+ const std::unique_ptr<openpower::targeting::Target>& target,
+ cfam_address_t address);
+
+
+/**
+ * @brief Writes a CFAM (Common FRU Access Macro) register in a P9
+ * using a mask to specify the bits the modify.
+ *
+ * Only bits that are set in the mask parameter will be modified.
+ *
+ * Throws an exception on error.
+ *
+ * @param[in] target - The Target to perform the operation on
+ * @param[in] address - The register address to write to
+ * @param[in] data - The data to write
+ * @param[in] mask - The mask
+ */
+void writeRegWithMask(
+ const std::unique_ptr<openpower::targeting::Target>& target,
+ cfam_address_t address,
+ cfam_data_t data,
+ cfam_mask_t mask);
+}
+}
+}