mirror of https://github.com/wolfSSL/wolfBoot.git
135 lines
3.5 KiB
C
135 lines
3.5 KiB
C
/* nrf52.c
|
|
*
|
|
* Copyright (C) 2018 wolfSSL Inc.
|
|
*
|
|
* This file is part of wolfBoot.
|
|
*
|
|
* wolfBoot is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* wolfBoot is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
|
|
/* Assembly helpers */
|
|
#define DMB() __asm__ volatile ("dmb")
|
|
|
|
|
|
/* Instantiation */
|
|
#define CLOCK_CONTROL_BASE (0x40000000)
|
|
#define NVMC_BASE (0x4001E000)
|
|
|
|
|
|
/* Flash write/erase control */
|
|
#define NVMC_CONFIG *((volatile uint32_t *)(NVMC_BASE + 0x504))
|
|
#define NVMC_ERASEPAGE *((volatile uint32_t *)(NVMC_BASE + 0x508))
|
|
#define NVMC_READY *((volatile uint32_t *)(NVMC_BASE + 0x400))
|
|
#define NVMC_CONFIG_REN 0
|
|
#define NVMC_CONFIG_WEN 1
|
|
#define NVMC_CONFIG_EEN 2
|
|
|
|
#define FLASH_PAGE_SIZE (4096)
|
|
|
|
/* Clock control */
|
|
#define TASKS_HFCLKSTART *((volatile uint32_t *)(CLOCK_CONTROL_BASE + 0x000))
|
|
#define TASKS_HFCLKSTOP *((volatile uint32_t *)(CLOCK_CONTROL_BASE + 0x004))
|
|
#define TASKS_HFCLKSTARTED *((volatile uint32_t *)(CLOCK_CONTROL_BASE + 0x100))
|
|
|
|
static void flash_wait_complete(void)
|
|
{
|
|
while (NVMC_READY == 0)
|
|
;
|
|
}
|
|
|
|
int hal_flash_write(uint32_t address, const uint8_t *data, int len)
|
|
{
|
|
int i;
|
|
uint8_t off = address & 0x03;
|
|
int words, align;
|
|
|
|
if (off != 0) {
|
|
uint32_t first = *((uint32_t *)(address - off));
|
|
uint8_t *firstbytes = (uint8_t *)(&first);
|
|
for (i = 0; i < 4 - off; i++) {
|
|
firstbytes[i + off] = data[i];
|
|
}
|
|
NVMC_CONFIG = NVMC_CONFIG_WEN;
|
|
flash_wait_complete();
|
|
*((uint32_t *)(address - off)) = first;
|
|
flash_wait_complete();
|
|
address += 4 - off;
|
|
data += off;
|
|
}
|
|
if (len > 3) {
|
|
uint32_t *src = (uint32_t *)data;
|
|
uint32_t *dst = (uint32_t *)address;
|
|
len -= off;
|
|
words = len / 4;
|
|
align = words * 4;
|
|
for (i = 0; i < words; i ++) {
|
|
NVMC_CONFIG = NVMC_CONFIG_WEN;
|
|
flash_wait_complete();
|
|
dst[i] = src[i];
|
|
flash_wait_complete();
|
|
}
|
|
if (len > align) {
|
|
uint32_t last = dst[words];
|
|
uint8_t *lastbytes = (uint8_t *)(&last);
|
|
for (i = off; i < 4; i++) {
|
|
if (i < len - align)
|
|
lastbytes[3 - i] = data[align + i];
|
|
}
|
|
NVMC_CONFIG = NVMC_CONFIG_WEN;
|
|
flash_wait_complete();
|
|
dst[words] = last;
|
|
flash_wait_complete();
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void hal_flash_unlock(void)
|
|
{
|
|
}
|
|
|
|
void hal_flash_lock(void)
|
|
{
|
|
}
|
|
|
|
|
|
int hal_flash_erase(uint32_t address, int len)
|
|
{
|
|
uint32_t end = address + len;
|
|
uint32_t p;
|
|
for (p = address; p <= end; p += FLASH_PAGE_SIZE) {
|
|
NVMC_CONFIG = NVMC_CONFIG_EEN;
|
|
flash_wait_complete();
|
|
NVMC_ERASEPAGE = p;
|
|
flash_wait_complete();
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void hal_init(void)
|
|
{
|
|
TASKS_HFCLKSTART = 1;
|
|
while(TASKS_HFCLKSTARTED == 0)
|
|
;
|
|
}
|
|
|
|
void hal_prepare_boot(void)
|
|
{
|
|
TASKS_HFCLKSTOP = 1;
|
|
}
|
|
|