On 05/06/2019 12:20, Sachin Ghadi wrote:
Thanks Sebastian,
On Wed, Jun 5, 2019 at 10:41 AM Sebastian Huber
<sebastian.hu...@embedded-brains.de> wrote:
Hello Sachin,
On 05/06/2019 06:15, sachin.gh...@sifive.com wrote:
Hi RTEMS dev team,
I don’t know if I should send this query to users list or developer list.
I am working on the getting RTEMS BSP ported on the one of RISC-V
based SoC.
Current RTEMS has support only for Spike simulator.
we have also support for Qemu. At least at some point in time it worked
with a non-upstream Qemu. I am not sure how far the upstreaming of the
Qemu support progressed in the last months.
It looks like RTEMS does not fit very well on the systems having less RAM.
We have 64K of RAM on our standard FPGA development kit for our E
series embedded cores.
64KiB for code and data is a challenge for RTEMS. You have to tinker
with the configuration and reduce the feature set to get into this range.
Yes 64K is challenge,for both data and code.
I can use external xip flash for code and but I need to change linker
script and start up code to load data section from flash to RAM.
I see RTEMs uses some initialized global variables.
We have to adjust
bsps/riscv/riscv/start/linkcmds.in
so that a ROM can be optionally used for text and read-only data.
All of the RTEMS test does not fit within this given RAM and linker
throws error.
Regarding this I have few questions
1. Does RTEMS accept support for new core with limited tests passing?
Or one need full test suit passing to qualify complete test?
What do you mean with "new core"? I think we already support the
practically relevant ISA combinations:
I guess 'core' is wrong word I used..I mean new BSP for our RISCV
based hardware development kit(Arty100). Core is rv32imac.
The current BSP uses a device tree for initialization. Do you want to
use this also for this tiny system? If not, then we have to find a way
to initialize everything with a static configuration.
--
Sebastian Huber, embedded brains GmbH
Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone : +49 89 189 47 41-16
Fax : +49 89 189 47 41-09
E-Mail : sebastian.hu...@embedded-brains.de
PGP : Public key available on request.
Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
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