px4-firmware/nuttx/fs/mmap/Kconfig

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#
# For a description of the syntax of this configuration file,
# see misc/tools/kconfig-language.txt.
#
config FS_RAMMAP
bool "File mapping emulation"
default n
---help---
NuttX operates in a flat open address space and is focused on MCUs that do
support Memory Management Units (MMUs). Therefore, NuttX generally does not
require mmap() functionality and the MCUs generally cannot support true
memory-mapped files.
However, memory mapping of files is the mechanism used by NXFLAT, the NuttX
tiny binary format, to get files into memory in order to execute them.
mmap() support is therefore required to support NXFLAT.
If FS_RAMMAP is defined in the configuration, then mmap() will
support simulation of memory mapped files by copying files whole
into RAM. These copied files have some of the properties of
standard memory mapped files.
See nuttx/fs/mmap/README.txt for additonal information.
if FS_RAMMAP
endif