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+++ b/packages/io/flash/current/include/flash_dev.h
@@ -0,0 +1,157 @@
+#ifndef CYGONCE_IO_FLASH_FLASH_DEV_H
+#define CYGONCE_IO_FLASH_FLASH_DEV_H
+//==========================================================================
+//
+//      flash_dev.h
+//
+//      Common flash device driver definitions
+//
+//==========================================================================
+//####COPYRIGHTBEGIN####
+//                                                                          
+// -------------------------------------------                              
+// The contents of this file are subject to the Red Hat eCos Public License 
+// Version 1.1 (the "License"); you may not use this file except in         
+// compliance with the License.  You may obtain a copy of the License at    
+// http://www.redhat.com/                                                   
+//                                                                          
+// Software distributed under the License is distributed on an "AS IS"      
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the 
+// License for the specific language governing rights and limitations under 
+// the License.                                                             
+//                                                                          
+// The Original Code is eCos - Embedded Configurable Operating System,      
+// released September 30, 1998.                                             
+//                                                                          
+// The Initial Developer of the Original Code is Red Hat.                   
+// Portions created by Red Hat are                                          
+// Copyright (C) 1998, 1999, 2000, 2001 Red Hat, Inc.
+// All Rights Reserved.                                                     
+// -------------------------------------------                              
+//                                                                          
+//####COPYRIGHTEND####
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):    hmt
+// Contributors: hmt, jskov
+// Date:         2001-02-22
+// Purpose:      Define common flash device driver definitions
+// Description:  The flash_data_t type is used for accessing
+//               devices at the correct width.
+//               The FLASHWORD macro must be used to create constants
+//               of suitable width.
+//               The FLASH_P2V macro can be used to fix up non-linear
+//               mappings of flash blocks (defaults to a linear 
+//               implementation).
+//              
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+
+#ifdef _FLASH_PRIVATE_
+
+// ------------------------------------------------------------------------
+//
+// No mapping on this target - but these casts would be needed if some
+// manipulation did occur.  An example of this might be:
+// // First 4K page of flash at physical address zero is
+// // virtually mapped at address 0xa0000000.
+// #define FLASH_P2V(x) ((volatile flash_t *)(((unsigned)(x) < 0x1000) ?
+//                            ((unsigned)(x) | 0xa0000000) :
+//                            (unsigned)(x)))
+
+#ifndef FLASH_P2V
+#define FLASH_P2V( _a_ ) ((volatile flash_t *)((unsigned int)(_a_)))
+#endif
+
+// ------------------------------------------------------------------------
+//
+// This generic code is intended to deal with all shapes and orientations
+// of Intel StrataFlash.  Trademarks &c belong to their respective owners.
+//
+// It therefore needs some trickery to define the constants and accessor
+// types that we use to interact with the device or devices.
+//
+// The assumptions are that
+//  o Parallel devices, we write to, with the "opcode" replicated per
+//    device
+//  o The "opcode" and status returns exist only in the low byte of the
+//    device's interface regardless of its width.
+//  o Hence opcodes and status are only one byte.
+// An exception is the test for succesfully erased data.
+//
+// ------------------------------------------------------------------------
+
+#if 8 == CYGNUM_FLASH_WIDTH
+
+# if 1 == CYGNUM_FLASH_INTERLEAVE
+#  define FLASHWORD( k ) ((flash_data_t)(k)) // To narrow a 16-bit constant
+typedef cyg_uint8 flash_data_t;
+# elif 2 == CYGNUM_FLASH_INTERLEAVE
+// 2 devices to make 16-bit
+#  define FLASHWORD( k ) ((k)+((k)<<8))
+typedef cyg_uint16 flash_data_t;
+# elif 4 == CYGNUM_FLASH_INTERLEAVE
+// 4 devices to make 32-bit
+#  define FLASHWORD( k ) ((k)+((k)<<8)+((k)<<16)+((k)<<24))
+typedef cyg_uint32 flash_data_t;
+# elif 8 == CYGNUM_FLASH_INTERLEAVE
+// 8 devices to make 64-bit - intermediate requires explicit widening
+#  define FLASHWORD32( k ) ((flash_data_t)((k)+((k)<<8)+((k)<<16)+((k)<<24)))
+#  define FLASHWORD( k ) (FLASHWORD32( k ) + (FLASHWORD32( k ) << 32));
+typedef cyg_uint64 flash_data_t;
+# else
+#  error How many 8-bit flash devices?
+# endif
+
+#elif 16 == CYGNUM_FLASH_WIDTH
+
+# if 1 == CYGNUM_FLASH_INTERLEAVE
+#  define FLASHWORD( k ) (k)
+typedef cyg_uin16 flash_data_t;
+# elif 2 == CYGNUM_FLASH_INTERLEAVE
+// 2 devices to make 32-bit
+#  define FLASHWORD( k ) ((k)+((k)<<16))
+typedef cyg_uint32 flash_data_t;
+# elif 2 == CYGNUM_FLASH_INTERLEAVE
+// 4 devices to make 64-bit - intermediate requires explicit widening
+#  define FLASHWORD32( k ) ((flash_data_t)((k)+((k)<<16)))
+#  define FLASHWORD( k ) (FLASHWORD32( k ) + (FLASHWORD32( k ) << 32));
+typedef cyg_uint64 flash_data_t;
+# else
+#  error How many 16-bit flash devices?
+# endif
+
+#elif 32 == CYGNUM_FLASH_WIDTH
+
+# if 1 == CYGNUM_FLASH_INTERLEAVE
+#  define FLASHWORD( k ) (k)
+typedef cyg_uint32 flash_data_t;
+# elif 2 == CYGNUM_FLASH_INTERLEAVE
+// 2 devices to make 64-bit - intermediate requires explicit widening
+#  define FLASHWORD32( k ) ((flash_data_t)(k))
+#  define FLASHWORD( k ) (FLASHWORD32( k ) + (FLASHWORD32( k ) << 32));
+typedef cyg_uint64 flash_data_t;
+# else
+#  error How many 32-bit flash devices?
+# endif
+
+#else
+# error What flash width?
+#endif
+
+// Data (not) that we read back:
+#if 0 == CYGNUM_FLASH_BLANK
+# define FLASH_BlankValue ((flash_data_t)0)
+#elif 1 == CYGNUM_FLASH_BLANK
+# define FLASH_BlankValue ((flash_data_t)(-1ll))
+#else
+# error What blank value?
+#endif
+
+#endif // _FLASH_PRIVATE_
+
+#endif // CYGONCE_IO_FLASH_FLASH_DEV_H
+//----------------------------------------------------------------------------
+// end of flash_dev.h