On 8/7/2015 8:38 AM, Gedare Bloom wrote:
An x86_64 BSP would be a welcome addition for testing purposes, which
Amar is interested in, and for getting another 64-bit target ported.
The best place to start would be to read the CPU supplement and BSP
porting guide. Any new architecture will need a GCC toolchain, which
is relatively straightforward but takes some time to add the correct
config lines into GCC. I've CC'd Hesham, as he has the most recent
experience with porting RTEMS to new architectures, so he might know
where you can find more information.
That's about the task list. You definitely have to get the tools
for x86_64-rtems building. You will have to file FSF paperwork if
you do the port. I am pretty quick at these so can take a swing
at giving you a patch. Then you (like Hesham did) can figure out
if I missed anything or didn't tweak it correctly.
The next step is to get a stub port (score/cpu) and stub bsp
(libbsp/x86_64) building with the toolset. That gives you
a buildable framework to place code in.
Beyond that, I recommend starting at the linker script and
start code and just working straight through what is needed
for hello world. Then add the clock driver and run ticker.
Followed by a benchmark timer driver.
An early investigation step is running base code compiled
with x86_64-elf on qemu. If that works, you have great
executable references for linker script, start code, and
basic console IO.
setjmp/longjmp in newlib are a handy starting point for
context switch code.
Growth from there will likely be leveraging modern peripherals
from pc386.
Gedare
On Fri, Aug 7, 2015 at 2:19 AM, punit vara <punitv...@gmail.com> wrote:
I have thought of creating BSP for x86_64 but unfortunately I was busy
in my exam and class hectic schedule.Shall I create or work on BSP
for X86_64 ?
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