diff --git a/include/firm/pxi/common/pxi_firm.h b/include/firm/pxi/common/pxi_firm.h
new file mode 100644
index 00000000..5fc1f7f8
--- /dev/null
+++ b/include/firm/pxi/common/pxi_firm.h
@@ -0,0 +1,122 @@
+/*---------------------------------------------------------------------------*
+  Project:  TwlFirm - -include - PXI
+  File:     pxi_firm.h
+
+  Copyright 2007 Nintendo.  All rights reserved.
+
+  These coded instructions, statements, and computer programs contain
+  proprietary information of Nintendo of America Inc. and/or Nintendo
+  Company Ltd., and are protected by Federal copyright law.  They may
+  not be disclosed to third parties or copied or duplicated in any form,
+  in whole or in part, without the prior written consent of Nintendo.
+
+  $Log: $
+  $NoKeywords: $
+ *---------------------------------------------------------------------------*/
+
+#ifndef FIRM_PXI_COMMON_FIRM_H_
+#define FIRM_PXI_COMMON_FIRM_H_
+
+#include <firm/pxi.h>
+#include <twl/memorymap.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// PXI sync ID for bootrom
+typedef enum
+{
+    // from ARM7
+    FIRM_PXI_ID_COLDBOOT = 1,   // _start
+    FIRM_PXI_ID_WARMBOOT = 2,   // _start
+
+    FIRM_PXI_ID_INIT_ARM7 = 7,  // PXI_InitFifoFIRM
+
+    FIRM_PXI_ID_LOAD_HEADER = 6,    // FATFS_LoadHeader
+    FIRM_PXI_ID_LOAD_STATIC = 5,    // FATFS_LoadStatic
+
+    FIRM_PXI_ID_LOAD_PIRIOD = 1,    // *_LoadBuffer
+
+    // from ARM9
+    FIRM_PXI_ID_INIT_MMEM = 3,  // _start
+
+    FIRM_PXI_ID_INIT_ARM9 = 9,  // PXI_InitFifoFIRM
+
+    FIRM_PXI_ID_AUTH_HEADER = 10,   // MI_LoadHeader
+    FIRM_PXI_ID_AUTH_STATIC = 11,   // MI_LoadStatic
+
+    FIRM_PXI_ID_SET_PATH = 4,       // main (nandfirm)
+    FIRM_PXI_ID_DONE_HEADER = 5,    // main (nandfirm)
+    FIRM_PXI_ID_DONE_STATIC = 6,    // main (nandfirm)
+
+    // from both of ARM9 and ARM7
+    FIRM_PXI_ID_NULL = 0,
+    FIRM_PXI_ID_ERR = 0xF
+}
+FIRMPxiID;
+
+
+/*---------------------------------------------------------------------------*
+  Name:         PXI_InitFIRM
+
+  Description:  initialize PXI for firm
+
+  Arguments:    None.
+
+  Returns:      None.
+ *---------------------------------------------------------------------------*/
+void PXI_InitFIRM(void);
+
+/*---------------------------------------------------------------------------*
+  Name:         PXI_SendStream
+
+  Description:  Send data stream
+
+  Arguments:    buf         pointer to data buffer
+                size        transfer size
+
+  Returns:      None.
+ *---------------------------------------------------------------------------*/
+void PXI_SendStream( const void* buf, int size );
+
+/*---------------------------------------------------------------------------*
+  Name:         PXI_RecvStream
+
+  Description:  Receive data stream
+
+  Arguments:    buf         pointer to data buffer
+                size        transfer size
+
+  Returns:      None.
+ *---------------------------------------------------------------------------*/
+void PXI_RecvStream( void* buf, int size );
+
+/*---------------------------------------------------------------------------*
+  Name:         PXI_NotifyID
+
+  Description:  Send ID
+
+  Arguments:    id          id to send
+
+  Returns:      None.
+ *---------------------------------------------------------------------------*/
+void PXI_NotifyID( FIRMPxiID id );
+
+/*---------------------------------------------------------------------------*
+  Name:         PXI_RecvID
+
+  Description:  Receive ID
+
+  Arguments:    None
+
+  Returns:      Received ID
+ *---------------------------------------------------------------------------*/
+FIRMPxiID PXI_RecvID( void );
+
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /* FIRM_PXI_COMMON_FIRM_H_ */