Hi Kever, On Thu, Apr 18, 2019 at 12:37 PM Kever Yang <kever.y...@rock-chips.com> wrote: > > Hi Simon, > > > On 04/18/2019 12:32 PM, Simon Glass wrote: > > Hi Kever, > > > > On Mon, 1 Apr 2019 at 02:21, Kever Yang <kever.y...@rock-chips.com> wrote: > >> Rockchip platform suppose to use TPL(run in SRAM) as dram init and > >> SPL(run in DDR SDRAM) as pre-loader, so that the SPL would not be > >> limited by SRAM size. > >> This patch add rk3399-board-tpl.c and its common configs. > > So this means that TPL inits SDRAM? That seems strange to me...why > > have SPL at all, then? What is SPL supported to do on RK3399 > > platforms? > > The model is: > TPL's code in SRAM, load by BOOTROM, EL3 mode(armv8) ,and focus at DDR > SDRAM init, have code size limit by SRAM; > SPL's code in DDR, load by BOOTROM, EL3 mode(armv8), and main feature is: > - parse and load trust, eg, bl31, bl32, op-tee, which need to before U-Boot; > - parse and load firmware for next stage, eg. u-boot, kernel; > U-Boot proper code in DDR, load by SPL, EL2 mode(armv8), full feature; > > and we may add features like below for SPL: > - secure verify for u-boot.itb; > - relocate to support bl31 better; > - boot kernel in falcon mode directly from SPL; > - implement usb download mode(rockusb) in case u-boot is broken; > - enable partition support to support A/B system for U-Boot; > - more storage driver support at the same time other than mmc, eg. spi, > nand;
Agreed. I have tried for similar model to add falcon in rk3288. So the TPL can boot from ROM and SPL can be from boot device sd/emmc/ etc correct? Jagan. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
