101 lines
3.3 KiB
C
101 lines
3.3 KiB
C
// Copyright 2022 Nick Brassel (@tzarc)
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include <stdbool.h>
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#include <hal.h>
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#include "util.h"
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#include "timer.h"
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#include "wear_leveling.h"
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#include "wear_leveling_internal.h"
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#ifndef WEAR_LEVELING_EXTERNAL_FLASH_BULK_COUNT
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# define WEAR_LEVELING_EXTERNAL_FLASH_BULK_COUNT 32
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#endif // WEAR_LEVELING_EXTERNAL_FLASH_BULK_COUNT
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bool backing_store_init(void) {
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bs_dprintf("Init\n");
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flash_init();
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return true;
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}
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bool backing_store_unlock(void) {
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bs_dprintf("Unlock\n");
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// No-op -- handled by the flash driver as it is.
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return true;
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}
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bool backing_store_erase(void) {
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#ifdef WEAR_LEVELING_DEBUG_OUTPUT
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uint32_t start = timer_read32();
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#endif
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bool ret = true;
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for (int i = 0; i < (WEAR_LEVELING_EXTERNAL_FLASH_BLOCK_COUNT); ++i) {
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flash_status_t status = flash_erase_block(((WEAR_LEVELING_EXTERNAL_FLASH_BLOCK_OFFSET) + i) * (EXTERNAL_FLASH_BLOCK_SIZE));
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if (status != FLASH_STATUS_SUCCESS) {
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ret = false;
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break;
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}
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}
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bs_dprintf("Backing store erase took %ldms to complete\n", ((long)(timer_read32() - start)));
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return ret;
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}
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bool backing_store_write(uint32_t address, backing_store_int_t value) {
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return backing_store_write_bulk(address, &value, 1);
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}
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bool backing_store_lock(void) {
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bs_dprintf("Lock \n");
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// No-op -- handled by the flash driver as it is.
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return true;
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}
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bool backing_store_read(uint32_t address, backing_store_int_t *value) {
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return backing_store_read_bulk(address, value, 1);
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}
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bool backing_store_read_bulk(uint32_t address, backing_store_int_t *values, size_t item_count) {
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bs_dprintf("Read ");
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uint32_t offset = (WEAR_LEVELING_EXTERNAL_FLASH_BLOCK_OFFSET) * (EXTERNAL_FLASH_BLOCK_SIZE) + address;
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flash_status_t status = flash_read_block(offset, values, sizeof(backing_store_int_t) * item_count);
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if (status == FLASH_STATUS_SUCCESS) {
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for (size_t i = 0; i < item_count; ++i) {
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values[i] = ~values[i];
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}
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wl_dump(offset, values, sizeof(backing_store_int_t) * item_count);
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}
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return status == FLASH_STATUS_SUCCESS;
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}
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bool backing_store_write_bulk(uint32_t address, backing_store_int_t *values, size_t item_count) {
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uint32_t offset = (WEAR_LEVELING_EXTERNAL_FLASH_BLOCK_OFFSET) * (EXTERNAL_FLASH_BLOCK_SIZE) + address;
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size_t index = 0;
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backing_store_int_t temp[WEAR_LEVELING_EXTERNAL_FLASH_BULK_COUNT];
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do {
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// Copy out the block of data we want to transmit first
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size_t this_loop = MIN(item_count, WEAR_LEVELING_EXTERNAL_FLASH_BULK_COUNT);
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for (size_t i = 0; i < this_loop; ++i) {
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temp[i] = values[index + i];
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}
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bs_dprintf("Write ");
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wl_dump(offset, temp, sizeof(backing_store_int_t) * this_loop);
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// Take the complement instead
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for (size_t i = 0; i < this_loop; ++i) {
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temp[i] = ~temp[i];
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}
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// Write out the block
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if (flash_write_block(offset, temp, sizeof(backing_store_int_t) * this_loop) != FLASH_STATUS_SUCCESS) {
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return false;
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}
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offset += this_loop * sizeof(backing_store_int_t);
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index += this_loop;
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item_count -= this_loop;
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} while (item_count > 0);
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return true;
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}
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