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// Copyright 2022 Nick Brassel (@tzarc)
// SPDX-License-Identifier: GPL-2.0-or-later
#include <stdbool.h>
#include <hal.h>
#include "timer.h"
#include "wear_leveling.h"
#include "wear_leveling_internal.h"
#include "flash_stm32.h"
bool backing_store_init(void) {
bs_dprintf("Init\n");
return true;
}
bool backing_store_unlock(void) {
bs_dprintf("Unlock\n");
FLASH_Unlock();
return true;
}
bool backing_store_erase(void) {
#ifdef WEAR_LEVELING_DEBUG_OUTPUT
uint32_t start = timer_read32();
#endif
bool ret = true;
FLASH_Status status;
for (int i = 0; i < (WEAR_LEVELING_LEGACY_EMULATION_PAGE_COUNT); ++i) {
status = FLASH_ErasePage(WEAR_LEVELING_LEGACY_EMULATION_BASE_PAGE_ADDRESS + (i * (WEAR_LEVELING_LEGACY_EMULATION_PAGE_SIZE)));
if (status != FLASH_COMPLETE) {
ret = false;
}
}
bs_dprintf("Backing store erase took %ldms to complete\n", ((long)(timer_read32() - start)));
return ret;
}
bool backing_store_write(uint32_t address, backing_store_int_t value) {
uint32_t offset = ((WEAR_LEVELING_LEGACY_EMULATION_BASE_PAGE_ADDRESS) + address);
bs_dprintf("Write ");
wl_dump(offset, &value, sizeof(backing_store_int_t));
return FLASH_ProgramHalfWord(offset, ~value) == FLASH_COMPLETE;
}
bool backing_store_lock(void) {
bs_dprintf("Lock \n");
FLASH_Lock();
return true;
}
bool backing_store_read(uint32_t address, backing_store_int_t* value) {
uint32_t offset = ((WEAR_LEVELING_LEGACY_EMULATION_BASE_PAGE_ADDRESS) + address);
backing_store_int_t* loc = (backing_store_int_t*)offset;
*value = ~(*loc);
bs_dprintf("Read ");
wl_dump(offset, loc, sizeof(backing_store_int_t));
return true;
}
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