On 8/17/20 8:28 PM, Alistair Francis wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know the > content is safe > > On Mon, Aug 17, 2020 at 11:12 AM via <qemu-devel@nongnu.org> wrote: >> Hi Anup, >> >> On 8/17/20 11:30 AM, Bin Meng wrote: >>> EXTERNAL EMAIL: Do not click links or open attachments unless you know the >>> content is safe >>> >>> Hi Anup, >>> >>> On Sat, Aug 15, 2020 at 1:44 AM Anup Patel <a...@brainfault.org> wrote: >>>> On Fri, Aug 14, 2020 at 10:12 PM Bin Meng <bmeng...@gmail.com> wrote: >>>>> From: Bin Meng <bin.m...@windriver.com> >>>>> >>>>> This adds support for Microchip PolarFire SoC Icicle Kit board. >>>>> The Icicle Kit board integrates a PolarFire SoC, with one SiFive's >>>>> E51 plus four U54 cores and many on-chip peripherals and an FPGA. >>>> Nice Work !!! This is very helpful. >>> Thanks! >>> >>>> The Microchip HSS is quite convoluted. It has: >>>> 1. DDR Init >>>> 2. Boot device support >>>> 3. SBI support using OpenSBI as library >>>> 4. Simple TEE support >>>> >>>> I think point 1) and 2) above should be part of U-Boot SPL. >>>> The point 3) can be OpenSBI FW_DYNAMIC. >>>> >>>> Lastly,for point 4), we are working on a new OpenSBI feature using >>>> which we can run independent Secure OS and Non-Secure OS using >>>> U-Boot_SPL+OpenSBI (for both SiFive Unleashed and Microchip >>>> PolarFire). >>>> >>>> Do you have plans for adding U-Boot SPL support for this board ?? >>> + Cyril Jean from Microchip >>> >>> I will have to leave this question to Cyril to comment. >>> >> I currently do not have a plan to support U-Boot SPL. The idea of the >> HSS is to contain all the silicon specific initialization and >> configuration code within the HSS before jumping to U-Boot S-mode. I >> would rather keep all this within the HSS for the time being. I would >> wait until we reach production silicon before attempting to move this to >> U-Boot SPL as the HSS is likely to contain some opaque silicon related >> changes for another while. > That is unfortunate, a lot of work has gone into making the boot flow > simple and easy to use. > > QEMU now includes OpenSBI by default to make it easy for users to boot > Linux. The Icicle Kit board is now the most difficult QEMU board to > boot Linux on. Not to mention it makes it hard to impossible to > support it in standard tool flows such as meta-riscv. > > Alistair
If it is such a problem we can add a U-Boot SPL stage and the HSS can be treated as standard SoC ROM code. Cyril.
