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Given that we only support a single RISC-V board, this puts us in
a good position to make this a multi-image-only architecture.
This commit adds the necessary bits. It's highly inspired by the ARM PBL
support. Notable difference is that for relocations to be generated, it
was necessary to compile with -fpic. The relocation code assumes the
relocation entries to preprocessed. This is done at build-time by
means of the prelink-riscv script imported from U-Boot.
Actual migration to -fpic and prelinking is done along with porting
erizo in a follow-up commit.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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