mkimage: allow zynqmp to use a register initialization file

[Sean Anderson]

On 6/3/26 12:25, Erich E. Hoover wrote:
> On Wed, Jun 3, 2026 at 9:55 AM Sean Anderson <seanga2 at gmail.com> wrote:
>> Please add a commit message.
> 
> My apologies to everyone.  The checkpatch.pl script caught that and,
> since I changed the title a little, I accidentally uploaded the wrong
> version.
> 
>> And isn't this already possible with -R ?
> 
> Yes, sort of, if you are using "zynqmpimage" instead of "zynqmpbif"

I've never seen the point of BIFs; I've been able to do everything I
want with zynqmpimage.

But this info would be good to put in the commit message.

> then you can add the register initialization with -R.  The patch
> leverages that existing capability to add support for the "[init]"
> attribute in the zynqmpbif backend:
> https://docs.amd.com/r/en-US/ug1283-bootgen-user-guide/init
> 
> We are using this feature, in combination with other zynqmpbif options, like so:
> ===
> image : {
>          [init] fsbl.int
>          [bootloader] fsbl.elf
>          [pmufw_image] pmufw.elf
>          [destination_cpu=none] fsbl.tcl
>          [destination_cpu=a53-0, exception_level=el-3] bl31.elf
>          [destination_cpu=a53-0, exception_level=el-2, load=0x08000000,
> startup=0x08000000] u-boot.bin
> }
> ===
> 
> Best,
> Erich