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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [devs/] [flash/] [intel/] [strata/] [v2_0/] [src/] [flash_query.c] - Rev 27
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//========================================================================== // // flash_query.c // // Flash programming - query device // //========================================================================== //####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): gthomas, hmt // Contributors: gthomas // Date: 2001-02-14 // Purpose: // Description: // //####DESCRIPTIONEND#### // //========================================================================== #include "strata.h" #include <pkgconf/hal.h> #include <cyg/hal/hal_arch.h> #include <cyg/hal/hal_cache.h> #include CYGHWR_MEMORY_LAYOUT_H // // CAUTION! This code must be copied to RAM before execution. Therefore, // it must not contain any code which might be position dependent! // #define CNT 20*1000*10 // Approx 20ms int flash_query(unsigned char *data) { volatile flash_t *ROM; int i, cnt; int cache_on; HAL_DCACHE_IS_ENABLED(cache_on); if (cache_on) { HAL_DCACHE_SYNC(); HAL_DCACHE_DISABLE(); } // Get base address and map addresses to virtual addresses ROM = FLASH_P2V( CYGNUM_FLASH_BASE ); #ifdef CYGOPT_FLASH_IS_BOOTBLOCK // BootBlock flash does not support full Read_Query - we have do a // table oriented thing above, after getting just two bytes of results: ROM[0] = FLASH_Read_ID; i = 2; #else // StrataFlash supports the full Read_Query op: ROM[0] = FLASH_Read_Query; i = sizeof(struct FLASH_query); #endif // Not CYGOPT_FLASH_IS_BOOTBLOCK for (cnt = CNT; cnt > 0; cnt--) ; for ( /* i */; i > 0; i-- ) { // It is very deliberate that data is chars NOT flash_t: // The info comes out in bytes regardless of device. *data++ = (unsigned char) (*ROM++); #ifndef CYGOPT_FLASH_IS_BOOTBLOCK # if 8 == CYGNUM_FLASH_WIDTH // strata flash with 'byte-enable' contains the configuration data // at even addresses ++ROM; # endif #endif } ROM[0] = FLASH_Reset; if (cache_on) { HAL_DCACHE_ENABLE(); } return 0; }
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