background: currently Armbian linux use the 'mainline u-boot' https://source.denx.de/u-boot/u-boot however, it has a '1.5GB' problem in that boards with 1.5GB DRAM is detected incorrectly. It detects 2GB instead possibly due to address wraparound, so the boot crashes mid stream. I'm trying to build a custom u-boot for a 'hack' i.e. to return 1.5GB dram from the memory initialization and setup functions. in part to explore solutions
what I tried and issues: I'm building u-boot from https://source.denx.de/u-boot/u-boot basically following these instructions https://docs.u-boot.org/en/latest/board/allwinner/sunxi.html my shell script ot build u-boot is like #!/usr/bin/bash export BL31=../arm-trusted-firmware/build/sun50i_h616/release/bl31.bin make orangepi_zero3_defconfig CROSS_COMPILE=aarch64-linux-gnu- make where the bl31 module from arm-trusted-firmware is in its own directory build with make CROSS_COMPILE=aarch64-linux-gnu- PLAT=sun50i_h616 I did succeed with building u-boot and flashed the u-boot SPL into the sd card sudo dd if=u-boot-sunxi-with-spl.bin of=/de v/sde bs=1024 seek=8 and it actually boots, but : U-Boot SPL 2024.04-00757-gbeac958153-dirty (Apr 19 2024 - 12:46:06 +0800) DRAM: 0 MiB Trying to boot from MMC1 NOTICE: BL31: v2.10.0(release):v2.10.0-729-gc8be7c08c NOTICE: BL31: Built : 23:11:18, Apr 18 2024 NOTICE: BL31: Detected Allwinner H616 SoC (1823) NOTICE: BL31: Found U-Boot DTB at 0x4a0be348, model: OrangePi Zero3 ERROR: RSB: set run-time address: 0x10003 U-Boot 2024.04-00757-gbeac958153-dirty (Apr 19 2024 - 12:46:06 +0800) Allwinner Technology size=30, ptr=590, limit=2000: 26370 CPU: Allwinner H616 (SUN50I) Model: OrangePi Zero3 DRAM: 0 Bytes So apparently the DRAM is not detected. I tried tracing flow execution by placing debug("tag"); or log_info("tag") in board_init_f() https://source.denx.de/u-boot/u-boot/-/blob/master/arch/arm/mach-sunxi/board.c?ref_type=heads#L457 and sunxi_dram_init() https://source.denx.de/u-boot/u-boot/-/blob/master/arch/arm/mach-sunxi/dram_sun50i_h616.c?ref_type=heads#L1377 however, none of my tags are printed, which implies that the initialization routines for both the board and sunxi_dram_init() are not called. I did configure logging to be pretty verbose in .config # # Logging # CONFIG_LOG=y CONFIG_LOG_MAX_LEVEL=8 CONFIG_LOG_DEFAULT_LEVEL=8 CONFIG_LOG_CONSOLE=y I'm not sure what else could be wrong or how to go about it further. -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/linux-sunxi/d4c8f022-d793-47cf-a6de-6a79fc7e9cefn%40googlegroups.com.
