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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [io/] [flash/] [v2_0/] [include/] [flash_dev.h] - Rev 308
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#ifndef CYGONCE_IO_FLASH_FLASH_DEV_H #define CYGONCE_IO_FLASH_FLASH_DEV_H //========================================================================== // // flash_dev.h // // Common flash device driver definitions // //========================================================================== //####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. // // eCos is free software; you can redistribute it and/or modify it under // the terms of the GNU General Public License as published by the Free // Software Foundation; either version 2 or (at your option) any later version. // // eCos is distributed in the hope that it will be useful, but WITHOUT ANY // WARRANTY; without even the implied warranty of MERCHANTABILITY or // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License // for more details. // // You should have received a copy of the GNU General Public License along // with eCos; if not, write to the Free Software Foundation, Inc., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. // // As a special exception, if other files instantiate templates or use macros // or inline functions from this file, or you compile this file and link it // with other works to produce a work based on this file, this file does not // by itself cause the resulting work to be covered by the GNU General Public // License. However the source code for this file must still be made available // in accordance with section (3) of the GNU General Public License. // // This exception does not invalidate any other reasons why a work based on // this file might be covered by the GNU General Public License. // // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. // at http://sources.redhat.com/ecos/ecos-license/ // ------------------------------------------- //####ECOSGPLCOPYRIGHTEND#### //========================================================================== //#####DESCRIPTIONBEGIN#### // // Author(s): hmt // Contributors: hmt, jskov, Jose Pascual <josepascual@almudi.com> // 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 *)((CYG_ADDRWORD)(_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_uint16 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 4 == 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
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