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/*
* Infineon XMC1000 flash sector erase check
*
* Copyright (c) 2016 Andreas Färber
*
* Based on XMC1100 AA-Step Reference Manual
*
* License: GPL-2.0+
*/
#include "xmc1xxx.S"
.macro verify_block, nvmbase, addr, tmp, tmp2
movs \tmp, #0x00
mvns \tmp, \tmp
str \tmp, [\addr, #0x0]
str \tmp, [\addr, #0x4]
str \tmp, [\addr, #0x8]
str \tmp, [\addr, #0xC]
busy_wait \nvmbase, \tmp, \tmp2
.endm
.macro erase_check, nvmbase, addr, end, tmp, tmp2
ldrh \tmp, [\nvmbase, #NVMCONF]
movs \tmp2, #NVMCONF_HRLEV_MASK
mvns \tmp2, \tmp2
ands \tmp, \tmp, \tmp2
movs \tmp2, #NVMCONF_HRLEV_HRE
orrs \tmp, \tmp, \tmp2
strh \tmp, [\nvmbase, #NVMCONF]
movs \tmp, #NVMPROG_ACTION_VERIFY_CONTINUOUS
strh \tmp, [\nvmbase, #NVMPROG]
2001:
verify_block \nvmbase, \addr, \tmp, \tmp2
ldrh \tmp, [\nvmbase, #NVMSTATUS]
movs \tmp2, #NVMSTATUS_VERR_MASK
ands \tmp, \tmp, \tmp2
cmp \tmp, #NVMSTATUS_VERR_NOFAIL
bne 2010f
adds \addr, \addr, #NVM_BLOCK_SIZE
cmp \addr, \end
blt 2001b
2010:
movs \tmp, #NVMPROG_ACTION_IDLE
strh \tmp, [\nvmbase, #NVMPROG]
.endm
/*
* r0 = 0x40050000
* r1 = e.g. 0x10001000
* r2 = e.g. 0x10002000
* NVMPROG.ACTION = 0x00
*/
erase_check:
erase_check r0, r1, r2, r3, r4
bkpt #0
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