Hi Kirill, Yes I did manage to debug using GDB and found the issue is with the device tree dm-pre-reloc for CPU. Thanks for confirming this. I sent the patch so we can have fix for the 10m50 board. I am using the golden hardware reference design which has MMU enabled.
Best regards, Yau Wai -----Original Message----- From: Kirill Smirnov [mailto:[email protected]] Sent: Wednesday, July 26, 2017 6:00 PM To: Gan, Yau Wai <[email protected]>; [email protected] Subject: [U-Boot] Nios II 10m50 is not working Hi, Yau I had a very similar problem with my project. It was sufficient for me to add "u-boot,dm-pre-reloc" stanza to cpu node only. This is necessary to properly setup mmu/nommu-related memory mappings. Other nodes remain unchanged. The resulting cpu node (omitting details) is as follows: cpu: cpu@0x0 { device_type = "cpu"; compatible = "altr,nios2-16.0", "altr,nios2-1.1"; reg = <0x00000000>; u-boot,dm-pre-reloc; .... } This works for my custom no-mmu project. Unfortunately, I cannot test this solution on other boards. ----------- On Thu Jul 6 14:30:54 UTC 2017 Gan, Yau Wai wrote: I tried adding the dm-pre-reloc line to every node and sub-node, but it doesn’t help. On 06/07/2017, 8:26 PM, "Lothar Waßmann" <LW at KARO-electronics.de> wrote: >Hi, > >On Thu, 6 Jul 2017 10:32:57 +0000 Gan, Yau Wai wrote: >> U-boot for Nios II on the 10m50 dev board is not functioning. The serial >> terminal prints nothing upon booting up. The u-boot image is loaded via >> GDB/JTAG to the FPGA on-chip RAM. >> >> Bisect activities were carried and discovered that the change from using >> dm_scan_fdt_node to dm_scan_fdt_dev in the simple_bus.c. This leads to >> suspecting the 10m50_devboard.dts need update to include >> "u-boot,dm-pre-reloc". >> >u-boot,dm-pre-reloc has to be present in each item of the DT path >leading to the node where you need it. > > >Lothar Waßmann _______________________________________________ U-Boot mailing list [email protected] https://lists.denx.de/listinfo/u-boot
