Perform uboot mirroring operation during BMC boot

Add a function to call the "mirror u-boot" service when the BMC boots.
Since the BMC is booting, we know we had a good u-boot and u-boot
environment, so we can safely copy the current one to the alternate
chip.

Change-Id: Ib628ea4a5fc9ae8d80f1047bddf94eb3fa52cdba
Signed-off-by: Eddie James <eajames@us.ibm.com>

2 files changed, 22 insertions, 0 deletions

diff --git a/item_updater.cpp b/item_updater.cpp
index df73fc5..03bc591 100644
--- a/item_updater.cpp
+++ b/item_updater.cpp
@@ -255,6 +255,8 @@ void ItemUpdater::processBMCImage()
             log<level::ERR>(e.what());
         }
     }
+
+    mirrorUbootToAlt();
     return;
 }
 
@@ -640,6 +642,21 @@ void ItemUpdater::freeSpace()
     }
 }
 
+void ItemUpdater::mirrorUbootToAlt()
+{
+    auto method = bus.new_method_call(SYSTEMD_BUSNAME, SYSTEMD_PATH,
+                                      SYSTEMD_INTERFACE, "StartUnit");
+    auto mirrorUbootFile = "obmc-flash-bmc-mirroruboot.service";
+    method.append(mirrorUbootFile, "replace");
+    auto result = bus.call(method);
+
+    // Check that the bus call didn't result in an error
+    if (result.is_method_error())
+    {
+        log<level::ERR>("Failed to copy U-Boot to alternate chip");
+    }
+}
+
 } // namespace updater
 } // namespace software
 } // namespace phosphor
diff --git a/item_updater.hpp b/item_updater.hpp
index d4d72bd..9fda860 100644
--- a/item_updater.hpp
+++ b/item_updater.hpp
@@ -208,6 +208,11 @@ class ItemUpdater : public ItemUpdaterInherit
      * @param[in]  versionId - The version id.
      */
     void removeReadOnlyPartition(std::string versionId);
+
+    /** @brief Copies U-Boot from the currently booted BMC chip to the
+     *  alternate chip.
+     */
+    void mirrorUbootToAlt();
 };
 
 } // namespace updater