Hi Experts,
We are trying to port sel4 to Shakti FPGA. It is similar to Rocket FPGA. The memory footprint is 256 mb [0x80000000 - 0x8fffffff]. Shakti support -march=imafd. A single core 64 bit design.
The run in FPGA stops at *"memcpy((char *)dest_vaddr + phys_virt_offset, (char *)elf + data_offset, data_size);*" called in the function " *unpack_elf_to_paddr()".* Earlier it stopped just at the memset (one line above). I manually commented out memset part and made it to run till memcpy. So I doubt it has something to do with wrong memory access. can someone please explain me the above said function (blue color) ? what could be reasons for memcpy to hung ?
Can someone please guide me to the area in code where memory related interrupts are coded ?
We have the latest upstream of SEL4 (Aug 10). It has the dornerworks upstream changes. We are trying to load at 0x88000000. The image works well in spike simulation.
*Commands to build:*
../init-build.sh -DPLATFORM=spike -DKernelPlatformSpikeRocketChip=ON -DSIMULATION=FALSE -DRISCV64=TRUE ninja
*Snapshot of the run in FPGA:*
DTB { #address-cells = <0x00000002>; #size-cells = <0x00000002>; compatible = "shakti,spike-bare-dev"; model = "shakti,spike-bare"; cpus { #address-cells = <0x00000001>; #size-cells = <0x00000000>; timebase-frequency = <0x00989680>; cpu@0 { device_type = "cpu"; reg = <0x00000000>; status = "okay"; compatible = "riscv"; riscv,isa = "rv64imafd"; mmu-type = "riscv,sv39"; clock-frequency = <0x3b9aca00>; interrupt-controller { #interrupt-cells = <0x00000001>; interrupt-controller; compatible = "riscv,cpu-intc"; linux,phandle = <0x00000001>; phandle = <0x00000001>; } } } memory@80000000 { device_type = "memory"; reg = <0x00000000 0x80000000 0x00000000 0x10000000>; } soc { #address-cells = <0x00000002>; #size-cells = <0x00000002>; compatible = "shakti,spike-bare-soc", "simple-bus"; ranges; } uart { compatible = "shakti,uart0"; reg = <0x00000000 0x00011200 0x00000000 0x00001000>; } htif { compatible = "ucb,htif0"; } } ELF-loader started on paddr=[80200000..8060e7d7] elf check file returned 1 elf check file returned 1 ELF-loading image 'kernel' paddr=[88000000..8802bfff] vaddr=[ffffffff80000000..ffffffff8002bfff] virt_entry=ffffffff80000000 configured page table levels = 3...... elf check file returned 1 image size 2b350 *(char *)dest_vaddr + phys_virt_offset = ffffffff88000000 * *phys_virt_offset = 8000000 * *(char *)elf + data_offset, = ffffffff8020f854* *started memcpy* ------------------------------------------------------------> *Hangs*