How should I build u-boot for qemu_arm64_defconfig and run it on arm64 qemu virt machine?

[Chan Kim]

Hello all,

I found by compiling u-boot-spl to start at 0x40200000 and using -kernel option, I can make u-boot-spl start loaded and started from 0x40200000. And then by loading the .itb file (FIT file) which contains u-boot proper binary at 0x40400000 using -device loader option, and setting CONFIG_SPL_LOAD_FIT_ADDERSS to 0x40400000 and I could make u-boot-spl execute u-boot at the end. To make .itb file, I used 'firmware = "uboot"' int the configuration, and 'type = "standalone"', 'os = "U-Boot"' and the 'uboot' image node. And I turned off SPL_BOOT_OS of course. I referenced the sample its files in u-boot.
(I can't copy-paste the file now so I just tell you the key lines)
Hope this helps someone layter. 
Thank you.

Chan Kim

>-----Original Message-----
>From: U-Boot <u-boot-bounces at lists.denx.de> On Behalf Of 김찬
>Sent: Tuesday, May 9, 2023 3:13 PM
>To: U-Boot Mailing List <u-boot at lists.denx.de>; qemu-discuss at nongnu.org
>Subject: RE: How should I build u-boot for qemu_arm64_defconfig and run it
>on arm64 qemu virt machine?
>
>
>Hi all,
>
>Hope someone who know this top reads this.
>I made the pflashs.img with u-boot-spl and used it as the flash memory (from
>address 0x00000000 ~). So the u-boot-spl program runs.
>And I guess I have to load (using qemu command option) a kind of image that
>contains u-boot proper and make the u-boot-spl to load u-boot proper at
>another address from that image and jump to that address.
>How can I make that image using mkimage if I have the u-boot.bin file?
>I think the command should start like 'mkimage -O u-boot -T ... ' but I
>don't know what type I should give for -T option.
>I will be very much grateful If anyone tells me how to do it.
>By the way, I want to check pci_init function once u-boot proper runs and I
>found pci_init is called in board_init_r when u-boot proper runs.
>
>Thank you!
>Chan Kim
>
>-----Original Message-----
>From:  "Chan Kim" <ckim at etri.re.kr>
>To:     "U-Boot Mailing List" <u-boot at lists.denx.de>;   <qemu-
>discuss at nongnu.org>;
>Cc:
>Sent:  2023-05-08 (월) 18:40:49 (UTC+09:00)
>Subject: How should I build u-boot for qemu_arm64_defconfig and run it on
>arm64 qemu virt machine?
>
>Hello experts,
>
>
>
>Today I tried this test from scratch.
>
>In my environment, CROSS_COMPILE=aarch64-none-elf.
>
>Under u-boot directory, when I do 'make CROSS_COMPILE=aarch64-none-elf-
>qemu_arm64_defconfig' and 'make -j28', I see this error at the end.
>
>
>
>aarch64-none-elf-ld.bfd: invalid length for memory region .sram
>
>
>
>after examining it, I added in include/configs/qemu-arm.h,
>
>
>
>#define CONFIG_SPL_MAX_SIZE value to 0x400000
>
>
>
>After fixing it, I got another similar error for .sdram and I added in
>include/configs/qemu-arm.h,
>
>
>
>#define CONFIG_SPL_BSS_START_ADDR 0x40800000
>
>#define CONFIG_SPL_BSS_MAX_SIZE 0x100000
>
>
>
>Now I can do 'make -j28' with no error.
>
>But I found I have both 'u-boot' and 'spl/u-boot-spl' generated and I
>realized for this qemu_arm64_defconfig, CONFIG_SPL=y and I get both u-boot
>proper and u-boot spl. (SPL: secondary program loader, proper: main
>bootloader. SPL runs first and the proper runs next).
>
>
>
>Until now I did objcopy of the u-boot(proper) and then extended it to
>0x400000 byte. (the pflash size of the virt machine which starts at address
>0x00000000).
>
>$ aarch64-none-elf-objcopy -O binary u-boot.v2022.07/u-boot pflashp.img
>
>$ dd if=/dev/zero of=pflashp.img bs=1c count=1 seek=67108863
>
>
>
>And the qemu command is :
>
>$ qemu-6.2.0/build/aarch64-softmmu/qemu-system-aarch64 -machine virt,gic-
>version=max,secure=on,virtualization=true -cpu max -drive
>if=pflash,file=pflashp.img -m 2G -nographic -device
>loader,file=linux-5.15.68/arch/arm64/boot/Image,addr=0x80200000
>
>
>
>The qemu virt machine has RAM from 0x40000000 until 0xbfffffff.
>
>And I could see u-boot runs and it waits input for 3 seconds and outputs the
>u-boot prompt.
>
>This is running u-boot (proper) from address 0 but since I have u-boot-spl
>too, I should run it from u-boot-spl first, shouldn't I?
>
>
>
>How am I supposed to run u-boot-spl and u-boot on this qemu machine? (from
>lds files, it looks like they both start at address 0).
>
>(qemu machine is arm64 virt machine, qemu 6.2.0).
>
>
>
>
>
>Thank you.
>
>
>
>Chan Kim
>
>
>