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skrzyp |
//==========================================================================
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//
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// flash_lock_block.c
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//
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// Flash programming
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//
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//==========================================================================
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// ####ECOSGPLCOPYRIGHTBEGIN####
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// -------------------------------------------
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// This file is part of eCos, the Embedded Configurable Operating System.
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// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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//
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// eCos is free software; you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free
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// Software Foundation; either version 2 or (at your option) any later
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// version.
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//
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// eCos is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with eCos; if not, write to the Free Software Foundation, Inc.,
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// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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// As a special exception, if other files instantiate templates or use
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// macros or inline functions from this file, or you compile this file
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// and link it with other works to produce a work based on this file,
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// this file does not by itself cause the resulting work to be covered by
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// the GNU General Public License. However the source code for this file
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// must still be made available in accordance with section (3) of the GNU
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// General Public License v2.
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//
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// This exception does not invalidate any other reasons why a work based
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// on this file might be covered by the GNU General Public License.
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// -------------------------------------------
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// ####ECOSGPLCOPYRIGHTEND####
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//==========================================================================
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//#####DESCRIPTIONBEGIN####
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//
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// Author(s): gthomas
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// Contributors: gthomas, msalter
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// Date: 2000-12-07
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// Purpose:
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// Description:
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//
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//####DESCRIPTIONEND####
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//
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//==========================================================================
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#include "flash.h"
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#include <cyg/hal/hal_arch.h>
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int
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flash_lock_block(volatile unsigned long *block)
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__attribute__ ((section (".2ram.flash_lock_block")));
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int
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flash_lock_block(volatile unsigned long *block)
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{
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volatile unsigned long *ROM;
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unsigned long stat;
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int timeout = 5000000;
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FLASH_WRITE_ENABLE();
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block = (volatile unsigned long *)CYGARC_UNCACHED_ADDRESS((unsigned long)block);
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ROM = (volatile unsigned long *)((unsigned long)block & FLASH_BASE_MASK);
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// Clear any error conditions
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ROM[0] = FLASH_Clear_Status;
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// Set lock bit
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block[0] = FLASH_Set_Lock;
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block[0] = FLASH_Set_Lock_Confirm; // Confirmation
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while(((stat = ROM[0]) & FLASH_Status_Ready) != FLASH_Status_Ready) {
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if (--timeout == 0) break;
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}
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// Restore ROM to "normal" mode
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ROM[0] = FLASH_Reset;
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FLASH_WRITE_DISABLE();
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return stat;
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}
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