1 files changed, 62 insertions, 0 deletions
diff --git a/ReferenceCode/Chipset/SystemAgent/MemoryInit/Pei/Source/Services/MrcIoControl.c b/ReferenceCode/Chipset/SystemAgent/MemoryInit/Pei/Source/Services/MrcIoControl.c
new file mode 100644
index 0000000..dc6fc11
--- /dev/null
+++ b/ReferenceCode/Chipset/SystemAgent/MemoryInit/Pei/Source/Services/MrcIoControl.c
@@ -0,0 +1,62 @@
+/** @file
+  This file is used as a driver to all memory controller IO registers.
+  It includes all the functions that the MRC needs to configure the IO and do the training.
+
+@copyright
+  Copyright (c) 1999 - 2012 Intel Corporation. All rights reserved.
+  This software and associated documentation (if any) is furnished
+  under a license and may only be used or copied in accordance
+  with the terms of the license. Except as permitted by such
+  license, no part of this software or documentation may be
+  reproduced, stored in a retrieval system, or transmitted in any
+  form or by any means without the express written consent of
+  Intel Corporation.
+
+  This file contains an 'Intel Peripheral Driver' and uniquely
+  identified as "Intel Reference Module" and is
+  licensed for Intel CPUs and chipsets under the terms of your
+  license agreement with Intel or your vendor.  This file may
+  be modified by the user, subject to additional terms of the
+  license agreement.
+**/
+
+//
+// Include files
+//
+#include "MrcIoControl.h"
+
+/**
+@brief
+  Reset the MC IO module. The MC hardware will handle creating the 20 dclk pulse
+  after the bit is set and will also clear the bit.
+
+  @param[in] MrcData - Include all MRC global data.
+
+  @retval mrcSuccess    - IO Reset was done successfully
+  @retval mrcDeviceBusy - Timed out waiting for the IO to clear the bit
+**/
+MrcStatus
+IoReset (
+  IN MrcParameters *const MrcData
+  )
+{
+  MCDECS_CR_MC_INIT_STATE_G_MCMAIN_STRUCT McInitStateG;
+  BOOL                                    Busy;
+  U32                                     Timeout;
+
+  Timeout = (U32) MrcGetCpuTime () + 10000;   // 10 seconds timeout
+
+  McInitStateG.Data          = MrcReadCR (MrcData, MCDECS_CR_MC_INIT_STATE_G_MCMAIN_REG);
+  McInitStateG.Bits.reset_io = 1;
+  MrcWriteCR (MrcData, MCDECS_CR_MC_INIT_STATE_G_MCMAIN_REG, McInitStateG.Data);
+
+  //
+  // Wait until the bit is cleared by hardware
+  //
+  do {
+    McInitStateG.Data = MrcReadCR (MrcData, MCDECS_CR_MC_INIT_STATE_G_MCMAIN_REG);
+    Busy              = (McInitStateG.Bits.reset_io == 1);
+  } while (Busy && ((U32) MrcGetCpuTime () < Timeout));
+
+  return (Busy ? mrcDeviceBusy : mrcSuccess);
+}