esp-idf/components/spi_flash/test/test_mmap.c

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <freertos/FreeRTOS.h>
#include <freertos/task.h>
#include <freertos/semphr.h>
#include <unity.h>
#include <esp_spi_flash.h>
#include <esp_attr.h>
#include <esp_flash_encrypt.h>
#include "test_config.h"
static uint32_t buffer[1024];
/* read-only region used for mmap tests */
static const uint32_t start = 0x100000;
static const uint32_t end = 0x200000;
TEST_CASE("Prepare data for mmap tests", "[mmap]")
{
srand(0);
for (int block = start / 0x10000; block < end / 0x10000; ++block) {
printf("Writing block %d\n", block);
for (int sector = 0; sector < 16; ++sector) {
for (uint32_t word = 0; word < 1024; ++word) {
uint32_t val = rand();
if (block == start / 0x10000 && sector == 0 && word == 0) {
printf("first word: %08x\n", val);
}
buffer[word] = val;
}
uint32_t abs_sector = (block) * 16 + sector;
printf("Writing sector %d\n", abs_sector);
ESP_ERROR_CHECK( spi_flash_erase_sector((uint16_t) abs_sector) );
ESP_ERROR_CHECK( spi_flash_write(abs_sector * SPI_FLASH_SEC_SIZE, (const uint8_t *) buffer, sizeof(buffer)) );
}
}
}
TEST_CASE("Can mmap into data address space", "[mmap]")
{
printf("Mapping %x (+%x)\n", start, end - start);
spi_flash_mmap_handle_t handle1;
const void *ptr1;
ESP_ERROR_CHECK( spi_flash_mmap(start, end - start, SPI_FLASH_MMAP_DATA, &ptr1, &handle1) );
printf("mmap_res: handle=%d ptr=%p\n", handle1, ptr1);
spi_flash_mmap_dump();
srand(0);
const uint32_t *data = (const uint32_t *) ptr1;
for (int block = 0; block < (end - start) / 0x10000; ++block) {
for (int sector = 0; sector < 16; ++sector) {
for (uint32_t word = 0; word < 1024; ++word) {
TEST_ASSERT_EQUAL_UINT32(rand(), data[(block * 16 + sector) * 1024 + word]);
}
}
}
printf("Mapping %x (+%x)\n", start - 0x10000, 0x20000);
spi_flash_mmap_handle_t handle2;
const void *ptr2;
ESP_ERROR_CHECK( spi_flash_mmap(start - 0x10000, 0x20000, SPI_FLASH_MMAP_DATA, &ptr2, &handle2) );
printf("mmap_res: handle=%d ptr=%p\n", handle2, ptr2);
spi_flash_mmap_dump();
printf("Mapping %x (+%x)\n", start, 0x10000);
spi_flash_mmap_handle_t handle3;
const void *ptr3;
ESP_ERROR_CHECK( spi_flash_mmap(start, 0x10000, SPI_FLASH_MMAP_DATA, &ptr3, &handle3) );
printf("mmap_res: handle=%d ptr=%p\n", handle3, ptr3);
spi_flash_mmap_dump();
printf("Unmapping handle1\n");
spi_flash_munmap(handle1);
spi_flash_mmap_dump();
printf("Unmapping handle2\n");
spi_flash_munmap(handle2);
spi_flash_mmap_dump();
printf("Unmapping handle3\n");
spi_flash_munmap(handle3);
}
TEST_CASE("flash_mmap invalidates just-written data", "[spi_flash]")
{
spi_flash_mmap_handle_t handle1;
const void *ptr1;
const size_t test_size = 128;
if (esp_flash_encryption_enabled()) {
TEST_IGNORE_MESSAGE("flash encryption enabled, spi_flash_write_encrypted() test won't pass as-is");
}
ESP_ERROR_CHECK( spi_flash_erase_sector(TEST_REGION_START / SPI_FLASH_SEC_SIZE) );
/* map erased test region to ptr1 */
ESP_ERROR_CHECK( spi_flash_mmap(TEST_REGION_START, test_size, SPI_FLASH_MMAP_DATA, &ptr1, &handle1) );
printf("mmap_res ptr1: handle=%d ptr=%p\n", handle1, ptr1);
/* verify it's all 0xFF */
for (int i = 0; i < test_size; i++) {
TEST_ASSERT_EQUAL_HEX(0xFF, ((uint8_t *)ptr1)[i]);
}
/* unmap the erased region */
spi_flash_munmap(handle1);
/* write flash region to 0xEE */
uint8_t buf[test_size];
memset(buf, 0xEE, test_size);
ESP_ERROR_CHECK( spi_flash_write(TEST_REGION_START, buf, test_size) );
/* re-map the test region at ptr1.
this is a fresh mmap call so should trigger a cache flush,
ensuring we see the updated flash.
*/
ESP_ERROR_CHECK( spi_flash_mmap(TEST_REGION_START, test_size, SPI_FLASH_MMAP_DATA, &ptr1, &handle1) );
printf("mmap_res ptr1 #2: handle=%d ptr=%p\n", handle1, ptr1);
/* assert that ptr1 now maps to the new values on flash,
ie contents of buf array.
*/
TEST_ASSERT_EQUAL_HEX8_ARRAY(buf, ptr1, test_size);
spi_flash_munmap(handle1);
}