Xiao Xufeng 789ce684c9 fix(mmap): fixed some API read wrong data via mmap when flash being erased/written while XIP on PSRAM ...

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

2026-06-16 01:00:43 +08:00

..

include

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

2026-06-16 01:00:43 +08:00

src

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

2026-06-16 01:00:43 +08:00