1 files changed, 5 insertions, 1 deletions
diff --git a/EmbeddedPkg/Include/Protocol/MmcHost.h b/EmbeddedPkg/Include/Protocol/MmcHost.h
index d04be6595..08f2ad934 100644
--- a/EmbeddedPkg/Include/Protocol/MmcHost.h
+++ b/EmbeddedPkg/Include/Protocol/MmcHost.h
@@ -1,7 +1,7 @@
 /** @file
   Definition of the MMC Host Protocol
 
-  Copyright (c) 2011, ARM Limited. All rights reserved.
+  Copyright (c) 2011-2014, ARM Limited. All rights reserved.
   
   This program and the accompanying materials                          
   are licensed and made available under the terms and conditions of the BSD License         
@@ -64,6 +64,10 @@ typedef UINT32 MMC_CMD;
 #define MMC_CMD55             (MMC_INDX(55) | MMC_CMD_WAIT_RESPONSE)
 #define MMC_ACMD41            (MMC_INDX(41) | MMC_CMD_WAIT_RESPONSE | MMC_CMD_NO_CRC_RESPONSE)
 
+// Valid responses for CMD1 in eMMC
+#define EMMC_CMD1_CAPACITY_LESS_THAN_2GB 0x00FF8080 // Capacity <= 2GB, byte addressing used
+#define EMMC_CMD1_CAPACITY_GREATER_THAN_2GB 0x40FF8080 // Capacity > 2GB, 512-byte sector addressing used
+
 typedef enum _MMC_STATE {
     MmcInvalidState = 0,
     MmcHwInitializationState,