Hi Burak,
This is a python configuration problem. You need to make sure the table walker
port is connected.
Please double check the ArmMMU.walkerPorts() method is called in the FS script
Kind Regards
Giacomo
> -----Original Message-----
> From: Burak Öçalan via gem5-users <gem5-users@gem5.org>
> Sent: 22 August 2021 14:06
> To: gem5-users@gem5.org
> Cc: Burak Öçalan <burakocala...@gmail.com>
> Subject: [gem5-users] atomic translation error in ARM FS Mode
>
> Hello. I am trying to atomically translate some virtual addresses in my
> prefetcher. The function I have defined for this purpose is:
>
> Addr BFS::translateAddr(Addr vaddr, PacketPtr &pkt) {
> DPRINTF(BFS, "Entered translateAddr with vaddr: %#x\n", vaddr);
> RequestPtr req = std::make_shared<Request>(
> vaddr, blkSize, 0, requestorId, 0, pkt->req->contextId());
>
> Fault f = tlb->translateAtomic(req,
> cache->system->threads[req->contextId()],
> BaseTLB::Read);
>
> if ( f != NoFault )
> DPRINTF(BFS, "BFS Translation Failed.\n");
> else
> {
> DPRINTF(BFS, "BFS translation succeded with paddr: %#x\n", req-
> >getPaddr());
> }
> return req->getPaddr();
> }
>
> When executing this code in ARM SE mode, everything works fine. But in FS
> mode, I get this error:
> fatal: system.cpu.mmu.dtb.walker.dma: Unconnected port!
>
> I am sharing the last portion of the debug output with TLB flag:
> 1343690404500: system.cpu.dcache.prefetcher: Entered translateAddr with
> vaddr: 0x532d00
> 1343690404500: system.cpu.mmu.dtb: translateFs addr 0x532d00, mode 0,
> st2 0, scr 0 sctlr 0x3475d91d flags 0 tranType 0x0
> 1343690404500: system.cpu.mmu.dtb: TLB Miss: Starting hardware table
> walker for 0x532d00(91:0)
> 1343690404500: system.cpu.mmu.dtb.walker: Beginning table walk for
> address 0x532d00, TCR: 0x32b5593519
> 1343690404500: system.cpu.mmu.dtb.walker: - Selecting TTBR0 (AArch64)
>
> I am sure that my vaddr is a valid address.
>
> Can you please help me understanding the cause of the error? Thanks a lot.
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