Customizing an IPL
QNX SDP8.0Building Embedded SystemsConfigurationDeveloper
If you need to write a custom IPL, it's best to work from an existing one, and preferably one for an SoC similar to the one you are using for your project.
The source code for a QNX IPL is available in the QNX BSP for the relevant hardware
platform. It is stored in a directory under
bsp_working_dir/src/hardware/ipl/boards/.
The source tree structure looks like this:
Before you begin customizing an IPL, you should review and understand what it does. When
you have done so, you will need to complete the following tasks to create a custom IPL:
- Create a new directory under bsp_working_dir/src/hardware/ipl/boards with your board name.
- Copy all files and subdirectories from a similar board into the new directory.
- Modify the files as appropriate.
- Rebuild your BSP with the new IPL (see
Building a BSP
in the Using a BSP chapter, and the BSP User's Guide for the BSP from which you started your work).
Note:
Systems that boot from disk or over the network typically come with a BIOS or UEFI (x86)
or ROM monitor (ARM), which already contains a large part of the IPL. If this is the
case for your system, you can probably skip directly to the
Startup Programs chapter.
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