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