diff options
Diffstat (limited to 'nuttx/fs/mmap/Kconfig')
| -rw-r--r-- | nuttx/fs/mmap/Kconfig | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/nuttx/fs/mmap/Kconfig b/nuttx/fs/mmap/Kconfig index a7b696c6a..03482e2d8 100644 --- a/nuttx/fs/mmap/Kconfig +++ b/nuttx/fs/mmap/Kconfig @@ -3,4 +3,25 @@ # see misc/tools/kconfig-language.txt. # -comment "File mapping emulation" +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 |