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spi_flash: Flush flash cache if flash_mmap()ing a written-to page

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Without this, it's possible for stale information to be read from
cache via mmap, even if the MMU table entry had been invalidated
prior to writing flash (if  the same MMU table entry was re-used after
writing flash.)
This commit is contained in:
Angus Gratton
2017-01-05 15:51:02 +11:00
committed by Ivan Grokhotkov
parent 95c150fe2c
commit 36ccdee6ec
7 changed files with 170 additions and 6 deletions
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7
components/spi_flash/test/test_spi_flash.c
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@@ -7,6 +7,8 @@
#include <esp_spi_flash.h>
#include <esp_attr.h>
#include "test_config.h"
struct flash_test_ctx {
uint32_t offset;
bool fail;
@@ -31,8 +33,7 @@ static void flash_test_task(void *arg)
vTaskDelay(0 / portTICK_PERIOD_MS);
uint32_t val = 0xabcd1234;
const uint32_t n = 4096;
for (uint32_t offset = 0; offset < n; offset += 4) {
for (uint32_t offset = 0; offset < SPI_FLASH_SEC_SIZE; offset += 4) {
if (spi_flash_write(sector * SPI_FLASH_SEC_SIZE + offset, (const uint8_t *) &val, 4) != ESP_OK) {
printf("Write failed at offset=%d\r\n", offset);
ctx->fail = true;
@@ -44,7 +45,7 @@ static void flash_test_task(void *arg)
vTaskDelay(0 / portTICK_PERIOD_MS);
uint32_t val_read;
for (uint32_t offset = 0; offset < n; offset += 4) {
for (uint32_t offset = 0; offset < SPI_FLASH_SEC_SIZE; offset += 4) {
if (spi_flash_read(sector * SPI_FLASH_SEC_SIZE + offset, (uint8_t *) &val_read, 4) != ESP_OK) {
printf("Read failed at offset=%d\r\n", offset);
ctx->fail = true;