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/*
* Infineon XMC1000 flash sectors erase
*
* Copyright (c) 2016 Andreas Färber
*
* Based on XMC1100 AA-Step Reference Manual
*
* License: GPL-2.0+
*/
#include "xmc1xxx.S"
#define DUMMY_VALUE 0x42
.macro erase_page, nvmbase, addr, tmp, tmp2
movs \tmp, #DUMMY_VALUE
str \tmp, [\addr]
busy_wait \nvmbase, \tmp, \tmp2
.endm
.macro erase, nvmbase, addr, end, tmp, tmp2
movs \tmp, #NVMPROG_ACTION_PAGE_ERASE_CONTINUOUS
strh \tmp, [\nvmbase, #NVMPROG]
2001:
erase_page \nvmbase, \addr, \tmp, \tmp2
movs \tmp, #(NVM_PAGE_SIZE - 1)
adds \tmp, \tmp, #1
add \addr, \addr, \tmp
cmp \addr, \end
blt 2001b
movs \tmp, #NVMPROG_ACTION_IDLE
strh \tmp, [\nvmbase, #NVMPROG]
.endm
/*
* r0 = 0x40050000
* r1 = e.g. 0x10001000
* r2 = e.g. 0x10011000
* NVMPROG.ACTION = 0x00
*/
erase:
erase r0, r1, r2, r3, r4
bkpt #0
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