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sys/riotboot: add revert and invalidate slot functions

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Update the function description

update write function

refactor riotboot_flashwrite_invalidate function

minor changes

minor nitpicks
This commit is contained in:
Firas Hamdi 2020-11-30 14:54:41 +01:00
parent c337089de5
commit d4c32caaaa
2 changed files with 60 additions and 0 deletions
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26
sys/include/riotboot/flashwrite.h
View File

@ -224,6 +224,32 @@ static inline int riotboot_flashwrite_finish(riotboot_flashwrite_t *state)
RIOTBOOT_FLASHWRITE_SKIPLEN);
}
/**
* @brief Invalidate a slot header (riotboot version)
*
* This function invalidates the target slot.
*
* @note If this function is called with only one valid slot,
* the invalidation will fail in order to keep one valid
* image to run after reboot
*
* @param[in] slot Target slot to invalidate
*
* @returns 0 on success, <0 otherwise
*/
int riotboot_flashwrite_invalidate(int slot);
/**
* @brief Invalidate the latest firmware version (riotboot version)
*
* This function invalidates the slot having the most recent firmware revision
*
* @note This function requires two valid images to succeed
*
* @returns 0 on success, <0 otherwise
*/
int riotboot_flashwrite_invalidate_latest(void);
/**
* @brief Get a slot's size
*

34
sys/riotboot/flashwrite.c
View File

@ -24,11 +24,17 @@
#include <string.h>
#include "riotboot/flashwrite.h"
#include "riotboot/slot.h"
#include "od.h"
#define LOG_PREFIX "riotboot_flashwrite: "
#include "log.h"
/**
* @brief Magic number used to invalidate a slot
*/
#define INVALIDATE_HDR 0xAA
static inline size_t min(size_t a, size_t b)
{
return a <= b ? a : b;
@ -150,6 +156,34 @@ int riotboot_flashwrite_putbytes(riotboot_flashwrite_t *state,
return 0;
}
int riotboot_flashwrite_invalidate(int slot)
{
if (riotboot_slot_numof == 1) {
LOG_WARNING(LOG_PREFIX "abort, only one slot configured\n");
return -1;
}
if (riotboot_slot_validate(1 - slot) != 0) {
LOG_WARNING(LOG_PREFIX "abort, can not erase slot[%d], other slot[%d] is invalid\n",slot, 1 - slot);
return -2;
}
uint8_t data_flash[4];
memset(data_flash, INVALIDATE_HDR, sizeof(data_flash));
flashpage_write((void *)riotboot_slot_get_hdr(slot), data_flash, sizeof(data_flash));
return 0;
}
int riotboot_flashwrite_invalidate_latest(void)
{
int _slot_to_revert;
_slot_to_revert = (riotboot_slot_get_hdr(riotboot_slot_other())->version
> riotboot_slot_get_hdr(riotboot_slot_current())->version)
? riotboot_slot_other() : riotboot_slot_current();
return riotboot_flashwrite_invalidate(_slot_to_revert);
}
int riotboot_flashwrite_finish_raw(riotboot_flashwrite_t *state,
const uint8_t *bytes, size_t len)
{