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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [devs/] [flash/] [synth/] [v2_0/] [src/] [flash_erase_block.c] - Rev 174
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//========================================================================== // // flash_erase_block.c // // Flash programming // //========================================================================== //####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): andrew.lunn@ascom.ch // Contributors: andrew.lunn // Date: 2001-10-30 // Purpose: // Description: // //####DESCRIPTIONEND#### // //========================================================================== #include "synth.h" #include <cyg/hal/hal_io.h> #include <pkgconf/devs_flash_synth.h> #include <cyg/infra/cyg_ass.h> #include <cyg/io/flash.h> #include <string.h> // memset /* This helps speed up the erase. */ static char empty[4096]; static cyg_bool empty_inited = false; int flash_erase_block(volatile flash_t *block, unsigned int block_size) { int i; int offset = (int)block; offset -= (int)cyg_dev_flash_synth_base; cyg_hal_sys_lseek(cyg_dev_flash_synth_flashfd, offset, CYG_HAL_SYS_SEEK_SET); if (!empty_inited) { memset(empty, 0xff, sizeof(empty)); empty_inited = true; } CYG_ASSERT(sizeof(empty) < block_size, "Eckk! Can't work with such small blocks"); CYG_ASSERT((block_size % sizeof(empty)) == 0, "Eckk! Can't work with that odd size block"); for (i=0; (i * sizeof(empty)) < block_size; i++) { cyg_hal_sys_write(cyg_dev_flash_synth_flashfd, empty, sizeof(empty)); } return FLASH_ERR_OK; }