blob: 9407be6cf58254292f84c97fcfa0d0179afc03e6 [file] [log] [blame]
/* Copyright (c) 2009 Dmitry Xmelkov
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
* Neither the name of the copyright holders nor the names of
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE. */
/* $Id: eeupd_block.S 1979 2009-06-05 23:08:14Z dmix $ */
#ifndef __DOXYGEN__
#include <avr/io.h>
#if E2END && __AVR_ARCH__ > 1
#include <avr/eeprom.h>
#include "asmdef.h"
#include "eedef.h"
/* void eeprom_update_block (const void *sram, void *eepr, size_t n)
*/
#define sram_lo r24
#define eepr_lo r22
ENTRY eeprom_update_block
#if RAMEND > 0xFF || E2END > 0xFF
X_movw XL, sram_lo
add XL, n_lo
adc XH, n_hi
subi n_lo, lo8(1)
sbci n_hi, hi8(1)
#else
mov XL, sram_lo
add XL, n_lo
subi n_lo, lo8(1)
#endif
brlo 3f
#if E2END > 0xFF
X_movw addr_lo, eepr_lo
add addr_lo, n_lo
adc addr_hi, n_hi
#else
mov addr_lo, eepr_lo
add addr_lo, n_lo
#endif
1: ld r18, -X
XCALL eeprom_update_r18
2: subi n_lo, lo8(1)
#if RAMEND > 0xFF || E2END > 0xFF
sbci n_hi, hi8(1)
#endif
brsh 1b
3: ret
ENDFUNC
#endif /* E2END && __AVR_ARCH__ > 1 */
#endif /* !__DOXYGEN__ */