54 lines
876 B
ArmAsm
54 lines
876 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
|
|
/*
|
|
* Infineon XMC1000 flash sectors erase
|
|
*
|
|
* Copyright (c) 2016 Andreas Färber
|
|
*
|
|
* Based on XMC1100 AA-Step Reference Manual
|
|
*/
|
|
|
|
#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
|