Mirrors/esp-idf
1
0
Fork 0
mirror of https://github.com/espressif/esp-idf.git synced 2026-10-01 18:50:34 +03:00
Code Issues Packages Projects Releases Wiki Activity

fix(mmap): fixed some API read wrong data via mmap when flash being erased/written while XIP on PSRAM

Browse Source 
Before:

The cache won't be disabled when XIP on psram. But during flash
erasing/programming, read data will be courrupt.

When XIP in psram is enabled, the image is not mapped to the cache so
usually there will be no flash access. The only way to read from flash
is via the driver or use mmap. The driver has protection during erasing,
while th mmap region not.

Now:

Mmap APIs provide a flag to make mmap->unmap region mutually exclusive
to flash erase/programming when XIP from psram. SPI Flash write APIs
will benefit from this. When the flag is used, no concurrent access to
mapped region will happen while writing; otherwise the cache will be
disable to avoid data corruption.

Most ESP-IDF APIs calls mmap with this flag. As for users calling
mmap-like APIs directly, they can choose whether to enable this by a
flag.

Closes https://github.com/espressif/esp-idf/issues/14897
This commit is contained in:
Xiao Xufeng
2026-08-31 01:37:44 +08:00
committed by Michael (XIAO Xufeng)
parent fd0b33dfda
commit 3d76ced5bb
73 changed files with 1673 additions and 487 deletions
Download Patch File Download Diff File Expand all files Collapse all files
examples/storage/partition_api/partition_mmap/main/main.c
+1 -1
View File
@@ -38,7 +38,7 @@ void app_main(void)
esp_partition_mmap_handle_t map_handle;
// Map the partition to data memory
ESP_ERROR_CHECK(esp_partition_mmap(partition, 0, partition->size, ESP_PARTITION_MMAP_DATA, &map_ptr, &map_handle));
ESP_ERROR_CHECK(esp_partition_mmap(partition, 0, partition->size, ESP_PARTITION_MMAP_DATA | ESP_PARTITION_MMAP_BLOCKS_WRITE, &map_ptr, &map_handle));
ESP_LOGI(TAG, "Mapped partition to data memory address %p", map_ptr);
// Read back the written verification data using the mapped memory pointer