| lkcl | well, what we are doing is borrowing bits from EXT01. | 14:09 |
|---|---|---|
| lkcl | EXT01 is the major opcode for Power ISA v3.1 "64-bit prefixing" | 14:09 |
| lkcl | in theeooorrryy there should be some patches to binutils to add 64-bit prefixing support already | 14:09 |
| lkcl | but | 14:09 |
| lkcl | i don't know how they decided to do it | 14:09 |
| tplaten | I now continue on the orangecrab port of ls2 | 14:10 |
| lkcl | tplaten, cool | 14:10 |
| tplaten | I assume that on an FPGA it boots from an SPI flash, which I will need to define first | 14:13 |
| lkcl | ah no. | 14:13 |
| tplaten | block ram used as rom, not sure | 14:13 |
| lkcl | a program is uploaded over DFI-UTIL which happens to contain a ROM-based (BRAM-based) version of coldboot.bin | 14:14 |
| lkcl | where coldboot.bin has been compiled to look, in *software*, for the SPI flash peripheral | 14:14 |
| lkcl | yes BRAM is used effectively as a ROM. | 14:15 |
| tplaten | I now have a look at coldboot.c, but assume that one can use hello_world for a first test instead | 14:21 |
| tplaten | because currently on the orangecrab I get | 14:22 |
| tplaten | ddr pins None | 14:22 |
| tplaten | spiflash pins None | 14:22 |
| lkcl | yes | 14:25 |
| lkcl | it's a good idea. | 14:25 |
| lkcl | hello_world.bin only needs BRAM and uart. | 14:26 |
| lkcl | from the verilator working you shouuuld be set up with the right start address | 14:27 |
| tplaten | I added SRAM (read-writeable BRAM) at 0x8000_0000 and still don't get any output from the hello world program. Something I must have forgotten. | 15:43 |
| tplaten | At least the Blinky module is working on ls2 on orangecrab. | 15:50 |
| tplaten | I compiled external_core_top.v with a matching --pc_reset and set BOOT_INIT_BASE to the correct address, still I do not get any UART output. | 15:58 |
| tplaten | I saw that ulx3s is using 40mhz, it now works. | 18:05 |
| tplaten | I get a "■ libre-soc, it works" output, now commiting the changes | 18:42 |
| tplaten | Tomorrow, I'll try to get SPI flash working | 18:52 |
Generated by irclog2html.py 2.17.1 by Marius Gedminas - find it at https://mg.pov.lt/irclog2html/!