This includes various patches towards implementing the VBE abrec bootmeth in U-Boot. It mostly focuses on introducing a relocating SPL-loader so that VBE can run in the limited amount of SRAM available on many devices.
Another minor new feature is support in VBE for specifying the image phase when loading from a FIT. This allows a single FIT to include images for several boot phases, thus simplifying image-creation.
One lingering niggle in this series is that it has a different code path for sandbox, since it does not support the relocating jump. It should be possible to resolve this with additional work, but I have not attempted this so far.
Again, only MMC is supported so far.
Looking ahead, series G will have some more plumbing and H some rk3399 pieces. That should be enough to complete these feature.
Here is a run in my lab, with the VBE ABrec bootmeth. You can see that VPL runs before memory is set up. SPL sets up memory and can be upgraded in the field reliably.
$ ub-int vbe Building U-Boot in sourcedir for rk3399-generic Bootstrapping U-Boot from dir /tmp/b/rk3399-generic Writing U-Boot using method rockchip
U-Boot TPL 2025.01-rc3-00345-gdfbdbf1eb56c-dirty (Jan 08 2025 - 10:47:58) Trying to boot from vbe_abrec load: Firefly-RK3399 Board Using 'config-3' configuration Trying 'image-vpl' firmware subimage Using 'config-3' configuration Trying 'fdt-3' fdt subimage
U-Boot VPL 2025.01-rc3-00345-gdfbdbf1eb56c-dirty (Jan 08 2025 - 10:47:58) Trying to boot from vbe_abrec load: Firefly-RK3399 Board Starting with empty state VBE: Firmware pick A at 800000 Using 'config-3' configuration Trying 'spl' firmware subimage Using 'config-3' configuration Trying 'fdt-3' fdt subimage Channel 0: DDR3, 800MHz BW=32 Col=10 Bk=8 CS0 Row=15 CS1 Row=15 CS=2 Die BW=16 Size=2048MB Channel 1: DDR3, 800MHz BW=32 Col=10 Bk=8 CS0 Row=15 CS1 Row=15 CS=2 Die BW=16 Size=2048MB 256B stride
U-Boot SPL 2025.01-rc3-00345-gdfbdbf1eb56c-dirty (Jan 08 2025 - 10:47:58 -0700) Trying to boot from vbe_abrec load: Firefly-RK3399 Board VBE: Firmware pick A at 900000 load_simple_fit: Skip load 'atf-5': image size is 0! Relocating bloblist ff8eff00 to 100000: done ns16550_serial serial@ff1a0000: pinctrl_select_state_full: uclass_get_device_by_phandle_id: err=-19
U-Boot 2025.01-rc3-00345-gdfbdbf1eb56c-dirty (Jan 08 2025 - 10:47:58 -0700)
SoC: Rockchip rk3399 Reset cause: POR Model: Firefly-RK3399 Board DRAM: 4 GiB (effective 3.9 GiB) Core: 314 devices, 33 uclasses, devicetree: separate MMC: mmc@fe310000: 3, mmc@fe320000: 1, mmc@fe330000: 0 Loading Environment from SPIFlash... Invalid bus 0 (err=-19) *** Warning - spi_flash_probe_bus_cs() failed, using default environment
In: serial,usbkbd Out: serial,vidconsole Err: serial,vidconsole Model: Firefly-RK3399 Board Net: PMIC: RK808 eth0: ethernet@fe300000
starting USB... Bus usb@fe380000: USB EHCI 1.00 Bus usb@fe3a0000: USB OHCI 1.0 Bus usb@fe3c0000: USB EHCI 1.00 Bus usb@fe3e0000: USB OHCI 1.0 Bus usb@fe900000: Register 2000140 NbrPorts 2 Starting the controller USB XHCI 1.10 scanning bus usb@fe380000 for devices... 1 USB Device(s) found scanning bus usb@fe3a0000 for devices... 1 USB Device(s) found scanning bus usb@fe3c0000 for devices... 2 USB Device(s) found scanning bus usb@fe3e0000 for devices... 1 USB Device(s) found scanning bus usb@fe900000 for devices... 1 USB Device(s) found scanning usb for storage devices... 0 Storage Device(s) found Hit any key to stop autoboot: 0
Simon Glass (15): vbe: Split out some VBE code into a common file vbe: Split out reading a FIT into a common file vbe: Allocate space for the FIT header vbe: Allow VBE to load FITs on any architecture vbe: Tidy up error checking with blk_read() vbe: Handle loading from an unaligned offset vbe: Allow loading loadables if there is no firmware vbe: Support loading an FDT from the FIT spl: Add fields for VBE spl: Add a type for the jumper function spl: Add support for a relocating jump to the next phase spl: Plumb in the relocating loader vbe: Support loading an FDT with the relocating loader vbe: Support loading SPL images vbe: Update simple-fw to support using the SPL loader
boot/Makefile | 2 +- boot/vbe_common.c | 362 +++++++++++++++++++++++++++++++++++++++++ boot/vbe_common.h | 173 ++++++++++++++++++++ boot/vbe_simple.c | 99 +++-------- boot/vbe_simple.h | 15 +- boot/vbe_simple_fw.c | 207 +++++++++-------------- common/spl/Kconfig | 8 + common/spl/Kconfig.tpl | 8 + common/spl/Kconfig.vpl | 8 + common/spl/Makefile | 1 + common/spl/spl.c | 15 +- common/spl/spl_reloc.c | 183 +++++++++++++++++++++ include/spl.h | 90 +++++++++- 13 files changed, 948 insertions(+), 223 deletions(-) create mode 100644 boot/vbe_common.c create mode 100644 boot/vbe_common.h create mode 100644 common/spl/spl_reloc.c