libguard: Adding function to check write flag

Change: Adding function checkWriteflag, which will read the write flag. Tested: In ipl code calling this function and its working as expected i.e. if flag is set to 0x00 return true else false. Signed-off-by: Chirag Sharma <[email protected]>
open-power · May 29, 2022 · 658570a · 658570a
1 parent e98a177
commit 658570a
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diff --git a/libguard/guard_interface.cpp b/libguard/guard_interface.cpp
@@ -434,6 +434,21 @@ void invalidateAll()
     }
 }
 
+bool checkWriteFlag()
+{
+    GuardFile file(guardFilePath);
+    GuardRecord_t guardRecord;
+    size_t headerFlagPos = 9;
+    file.read(headerPos, &guardRecord.iv_flags, sizeof(guardRecord.iv_flags));
+
+    if ((guardRecord.iv_flags & GARD_FLAG_MASK_PNOR_WRITE_IN_PROGRESS) ==
+        GARD_FLAG_PNOR_WRITE_IS_IN_PROGRESS)
+    {
+        return true;
+    }
+    return false;
+}
+
 void libguard_init(bool enableDevtree)
 {
     initialize();

diff --git a/libguard/guard_interface.hpp b/libguard/guard_interface.hpp
@@ -149,6 +149,13 @@ const fs::path& getGuardFilePath();
  */
 bool isEphemeralType(const uint8_t recordType);
 
+/**
+ * @brief Used to read the write flag of guard header
+ *
+ * @return true if bit is 0x00 else false.
+ */
+bool checkWriteFlag();
+
 namespace utest
 {
 void setGuardFile(const fs::path& file);