Binman how to build using Rockchip BL32 binary as OP-TEE

[Massimo Pegorer]

Il giorno mar 5 set 2023 alle ore 20:16 Simon Glass <sjg at chromium.org>
ha scritto:
>
> Hi Jonas,
>
> On Mon, 4 Sept 2023 at 10:52, Jonas Karlman <jonas at kwiboo.se> wrote:
> >
> > Hi Massimo,
> >
> > On 2023-09-04 17:05, Massimo Pegorer wrote:
> > > Hi,
> > >
> > > Is there any way for binman to package FIT with U-Boot TF-A and
> > > OP-TEE, using bl32 binary provided by Rockchip as TEE?
> > >
> > > I've tried with TEE=/path/to/rkbin/bin/rk33/xxx_bl32_vX.YZ.bin, but
> > > binman failed.
> > >
> > > In my poor understanding of Python code, it seems binman accepts only
> > > ELF format or a binary format starting with optee_v1_header, but
> > > binaries provided by Rockchip in rkbin repository do not have this
> > > header.
> >
> > One way that I have used/tested before was to create a tee.elf version
> > using something like:
> >
> > $ aarch64-linux-gnu-objcopy -B aarch64 -I binary -O elf64-littleaarch64 xxx_bl32_vX.YZ.bin bl32.o
> > $ aarch64-linux-gnu-ld bl32.o -T tee.ld -o tee.elf
> >
> > tee.ld:
> > ----
> > ENTRY(_binary_bl32_bin_start);
> >
> > SECTIONS
> > {
> >         . = 0x08400000;
> >         .data : {
> >                 *(.data)
> >         }
> > }
> > ----
> >
> > And then make with TEE=tee.elf, however keep in mind that U-Boot may not
> > treat the memory region used by OP-TEE properly for aarch64.
> >
> > Regards,
> > Jonas
> >
> > >
> > > Thanks in advance for any hints!
>
> Should we do something to support a 'flat' binary in the tee-os entry type? For example, we could allow it if so long as a fixed load address is provided? It might be a bit of a hack though.

I do not know how much fixed is the load address and how much it
depends on SoC and OP-TEE build, instead.

I think it would be preferable if Rokchip will provide also the
tee-header_v2.bin, so that binman could extract load address info as
it does when parsing tee.bin.

Regards,
Massimo

> Regards,
> Simon