---------- Forwarded message --------- From: Deepak Mohan <usr...@gmail.com> Date: Wed, Jun 16, 2021 at 5:16 PM Subject: Re: [gem5-users] Making an address range uncacheable RISCV FS. To: Ayaz Akram <yazak...@ucdavis.edu>
Hi Ayaz, Thank you, it looks great, I was working with a previous version of gem5. I would like to know one more thing, is there any way to flush a cache line in gem5 RISCV, from my initial research I found that RISCV currently doesn't provide any instruction to achieve this, is there any way to achieve this in gem5 currently or should I try to add a new instruction for this. Thank you, Regards Deepak Mohan On Wed, Jun 16, 2021 at 2:20 AM Ayaz Akram <yazak...@ucdavis.edu> wrote: > > Hi Deepak, > > RISC-V PMA is supported in gem5. You can have a look at the source here: > https://gem5.googlesource.com/public/gem5/+/refs/heads/develop/src/arch/riscv/PMAChecker.py > > Also, here is an example of how this can be used in the gem5 config script: > > https://gem5.googlesource.com/public/gem5-resources/+/refs/heads/develop/src/riscv-fs/configs-riscv-fs/system/system.py#214 > > -Ayaz > > On Tue, Jun 15, 2021 at 1:23 PM Deepak Mohan via gem5-users > <gem5-users@gem5.org> wrote: >> >> Hi, >> I was writing an OS that can run on RISC-V FS mode in gem5. I want >> to make certain address ranges uncacheable (for some memory mapped >> devices). RISCV page table entries doesn't provide any flags to >> achieve this. The proper way to do this in RISCV seems to be using PMA >> (Physical Memory Attributes), but I couldn't find any implementations >> of PMA in gem5. Is PMA implemented for RISCV in gem5 ? Is this the >> right approach to solve this problem ? Can anybody give me any ideas >> to solve this problem ? It will be great if anyone can provide some >> ideas. >> >> Thanks, >> Deepak Mohan >> _______________________________________________ >> gem5-users mailing list -- gem5-users@gem5.org >> To unsubscribe send an email to gem5-users-le...@gem5.org >> %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s _______________________________________________ gem5-users mailing list -- gem5-users@gem5.org To unsubscribe send an email to gem5-users-le...@gem5.org %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s
