kiwamu has been targeting an arm cortex-m3 succesfully with jhc. this
is a CPU with 40k of RAM running Haskell code very much on bare metal.
:)
John
On Tue, Mar 19, 2013 at 6:07 PM, Jeremy Shaw
There have been at least a couple projects, such as hOp and HaLVM which attempt to run GHC on the bare metal or something similar.
Both these projects required a substantial set of patches against GHC to remove dependencies things like POSIX/libc. Due to the highly invasive nature, they are also highly prone to bitrot.
With GHC 7.8, I believe we will be able to cross-compile to the Raspberry Pi platform. But, what really appeals to me is going that extra step and avoiding the OS entirely and running on the bare metal. Obviously, you give up a lot -- such as drivers, network stacks, etc. But, there is also a lot of potential to do neat things, and not have to worry about properly shutting down an embedded linux box.
Also, since the raspberry pi is a very limited, uniform platform, (compared to general purpose PCs) it is feasible to create network drivers, etc, because only one chipset needs to be supported. (Ignoring issues regarding binary blobs, undocumented chipsets, usb WIFI, etc).
I'm wondering if things are any easier with cross-compilation support improving. My thought is that less of GHC needs to be tweaked?
- jeremy
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