Add 32-bit word swap on Explorer inband structures

  Due to how the OpenCapi interface breaks up transactions into
  32-bit words, we need to swap the first and second 32 bits in a
  64-bit transfer

Change-Id: Ib32e6006fe607c05423fe18972a424b03f7a07d4
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/76771
Reviewed-by: Mark Pizzutillo <mark.pizzutillo@ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/76882
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/import/chips/ocmb/explorer/procedures/hwp/memory/exp_inband.C b/src/import/chips/ocmb/explorer/procedures/hwp/memory/exp_inband.C
index 4db9ebc12..46a0c04b5 100644
--- a/src/import/chips/ocmb/explorer/procedures/hwp/memory/exp_inband.C
+++ b/src/import/chips/ocmb/explorer/procedures/hwp/memory/exp_inband.C
@@ -674,6 +674,18 @@ fapi2::ReturnCode correctMMIOEndianForStruct(std::vector<uint8_t>& io_data)
         io_data.erase(io_data.begin(), io_data.begin() + BUFFER_TRANSACTION_SIZE);
     }
 
+    // Because of how the OpenCapi interface breaks up the transaction, we also need to swap 32-bit word order
+    for (size_t l_idx = 0; l_idx < io_data.size(); l_idx += BUFFER_TRANSACTION_SIZE)
+    {
+        for (size_t l_bidx = l_idx; l_bidx < l_idx + BUFFER_TRANSACTION_SIZE / 2; l_bidx++)
+        {
+            uint8_t l_temp_first_word = io_data.at(l_bidx);
+            uint8_t l_temp_second_word = io_data.at(l_bidx + BUFFER_TRANSACTION_SIZE / 2);
+            io_data[l_bidx] = l_temp_second_word;
+            io_data[l_bidx + BUFFER_TRANSACTION_SIZE / 2] = l_temp_first_word;
+        }
+    }
+
 fapi_try_exit:
     FAPI_DBG("Exiting with return code : 0x%08X...", (uint64_t) fapi2::current_err);
     return fapi2::current_err;