mcuboot/boot/zephyr/flash_map_extended.c

102 lines
2.1 KiB
C

/*
* Copyright (c) 2018 Nordic Semiconductor ASA
* Copyright (c) 2015 Runtime Inc
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr.h>
#include <flash.h>
#include "target.h"
#include <flash_map_backend/flash_map_backend.h>
#include <sysflash/sysflash.h>
#include "bootutil/bootutil_log.h"
MCUBOOT_LOG_MODULE_DECLARE(mcuboot);
#if (!defined(CONFIG_XTENSA) && defined(DT_FLASH_DEV_NAME))
#define FLASH_DEVICE_ID SOC_FLASH_0_ID
#elif (defined(CONFIG_XTENSA) && defined(DT_SPI_NOR_DRV_NAME))
#define FLASH_DEVICE_ID SPI_FLASH_0_ID
#else
#error "FLASH_DEVICE_ID could not be determined"
#endif
#define FLASH_DEVICE_BASE CONFIG_FLASH_BASE_ADDRESS
static struct device *flash_dev;
struct device *flash_device_get_binding(char *dev_name)
{
if (!flash_dev) {
flash_dev = device_get_binding(dev_name);
}
return flash_dev;
}
int flash_device_base(uint8_t fd_id, uintptr_t *ret)
{
if (fd_id != FLASH_DEVICE_ID) {
BOOT_LOG_ERR("invalid flash ID %d; expected %d",
fd_id, FLASH_DEVICE_ID);
return -EINVAL;
}
*ret = FLASH_DEVICE_BASE;
return 0;
}
/*
* This depends on the mappings defined in sysflash.h, and assumes
* that slot 0, slot 1, and the scratch areas are contiguous.
*/
int flash_area_id_from_image_slot(int slot)
{
return slot + FLASH_AREA_IMAGE_0;
}
int flash_area_sector_from_off(off_t off, struct flash_sector *sector)
{
int rc;
struct flash_pages_info page;
rc = flash_get_page_info_by_offs(flash_dev, off, &page);
if (rc) {
return rc;
}
sector->fs_off = page.start_offset;
sector->fs_size = page.size;
return rc;
}
#define ERASED_VAL 0xff
uint8_t flash_area_erased_val(const struct flash_area *fap)
{
(void)fap;
return ERASED_VAL;
}
int flash_area_read_is_empty(const struct flash_area *fa, uint32_t off,
void *dst, uint32_t len)
{
uint8_t i;
uint8_t *u8dst;
int rc;
rc = flash_area_read(fa, off, dst, len);
if (rc) {
return -1;
}
for (i = 0, u8dst = (uint8_t *)dst; i < len; i++) {
if (u8dst[i] != ERASED_VAL) {
return 0;
}
}
return 1;
}