Mercurial > ecos
diff packages/devs/flash/intel/bootblock/current/src/flash_program_buf.c @ 136:a9ac27ec7abc ecos-sw-2000-11-17
Merge from eCos master repository on 2000-11-17-18:24:25-GMT
| author | jlarmour |
|---|---|
| date | Fri, 17 Nov 2000 23:16:43 +0000 |
| parents | |
| children | e0c0827131d1 |
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new file mode 100644 --- /dev/null +++ b/packages/devs/flash/intel/bootblock/current/src/flash_program_buf.c @@ -0,0 +1,95 @@ +//========================================================================== +// +// flash_program_buf.c +// +// Flash programming +// +//========================================================================== +//####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 Red Hat, Inc. +// All Rights Reserved. +// ------------------------------------------- +// +//####COPYRIGHTEND#### +//========================================================================== +//#####DESCRIPTIONBEGIN#### +// +// Author(s): gthomas +// Contributors: gthomas +// Date: 2000-07-14 +// Purpose: +// Description: +// +//####DESCRIPTIONEND#### +// +//========================================================================== + +#include "flash.h" + +#include <pkgconf/hal.h> +#include <cyg/hal/hal_arch.h> +#include <cyg/hal/hal_cache.h> + +// +// CAUTION! This code must be copied to RAM before execution. Therefore, +// it must not contain any code which might be position dependent! +// + +int +flash_program_buf(volatile unsigned short *addr, unsigned short *data, int len) +{ + volatile unsigned short *ROM; + unsigned short stat = 0; + int timeout = 50000; + + GO_SLOW + + ROM = (volatile unsigned short *)((unsigned long)addr & 0xFF800000); + // Clear any error conditions + ROM[0] = FLASH_Clear_Status; + + while (len > 0) { + ROM[0] = FLASH_Program; + *addr = *data; + timeout = 5000000; + while(((stat = ROM[0]) & FLASH_Status_Ready) != FLASH_Status_Ready) { + if (--timeout == 0) { + goto bad; + } + } + if (stat & 0x007E) { + break; + } + ROM[0] = FLASH_Reset; + if (*addr++ != *data++) { + stat = 0x9910; + break; + } + len -= 2; + } + + // Restore ROM to "normal" mode + bad: + ROM[0] = FLASH_Reset; + + GO_FAST + + return stat; +}
