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/*
* Infineon XMC1000 flash
*
* Copyright (c) 2016 Andreas Färber
*
* Based on XMC1100 AA-Step Reference Manual
*
* License: GPL-2.0+
*/
.text
.syntax unified
.cpu cortex-m0
.thumb
.thumb_func
#define NVMSTATUS 0x00
#define NVMPROG 0x04
#define NVMCONF 0x08
#define NVMSTATUS_BUSY (1 << 0)
#define NVMSTATUS_VERR_NOFAIL (0x0 << 2)
#define NVMSTATUS_VERR_MASK (0x3 << 2)
#define NVMPROG_ACTION_IDLE 0x00
#define NVMPROG_ACTION_WRITE_CONTINUOUS 0xA1
#define NVMPROG_ACTION_PAGE_ERASE_CONTINUOUS 0xA2
#define NVMPROG_ACTION_VERIFY_CONTINUOUS 0xE0
#define NVMCONF_HRLEV_NR (0x0 << 1)
#define NVMCONF_HRLEV_HRE (0x2 << 1)
#define NVMCONF_HRLEV_MASK (0x3 << 1)
#define NVM_WORD_SIZE 4
#define NVM_BLOCK_SIZE (4 * NVM_WORD_SIZE)
#define NVM_PAGE_SIZE (16 * NVM_BLOCK_SIZE)
.macro busy_wait, nvmbase, tmp, tmp2
1:
ldrh \tmp, [\nvmbase, #NVMSTATUS]
movs \tmp2, #NVMSTATUS_BUSY
ands \tmp, \tmp, \tmp2
cmp \tmp, \tmp2
beq 1b
.endm
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