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sunxi: binman: Add support for including SCP firmware

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Allwinner sun50i SoCs contain an OpenRISC 1000 CPU that functions as a
System Control Processor, or SCP. ARM Trusted Firmware (ATF)
communicates with the SCP over SCPI to implement the PSCI system
suspend, shutdown and reset functionality. Currently, SCP firmware is
optional; the system will boot and run without it, but system suspend
will be unavailable.

Since all communication with the SCP is mediated by ATF, the only thing
U-Boot needs to do is load the firmware into SRAM. The SCP firmware
occupies the last 16KiB of SRAM A2, immediately following ATF.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
This commit is contained in:
Samuel Holland
2020-10-21 21:12:16 -05:00
committed by Jagan Teki
parent 18bd45592c
commit e72a6be4fc
3 changed files with 60 additions and 8 deletions
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4
tools/binman/missing-blob-help
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@@ -13,3 +13,7 @@ Firmware and build with BL31=/path/to/bl31.bin
atf-bl31-sunxi:
Please read the section on ARM Trusted Firmware (ATF) in
board/sunxi/README.sunxi64
scp-sunxi:
SCP firmware is required for system suspend, but is otherwise optional.
Please read the section on SCP firmware in board/sunxi/README.sunxi64