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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>
20 lines
797 B
Plaintext
20 lines
797 B
Plaintext
# This file contains help messages for missing external blobs. Each message has
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# a tag (MUST be just lower-case text, digits and hyphens) starting in column 1,
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# followed by a colon (:) to indicate its start. The message can include any
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# number of lines, including blank lines.
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#
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# When looking for a tag, Binman uses the value of 'missing-msg' for the entry,
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# the entry name or the entry type, in that order
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atf-bl31:
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See the documentation for your board. You may need to build ARM Trusted
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Firmware and build with BL31=/path/to/bl31.bin
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atf-bl31-sunxi:
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Please read the section on ARM Trusted Firmware (ATF) in
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board/sunxi/README.sunxi64
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scp-sunxi:
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SCP firmware is required for system suspend, but is otherwise optional.
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Please read the section on SCP firmware in board/sunxi/README.sunxi64
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