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eed8adeb49
Enable the coreboot CMOS option table, which initializes CMOS if the checksum is not valid. There is now a checksum in the CMOS layout since 4.21, update it when updating the Mini v1/v2 EC power-on setting. coreboot 4.21 will reset the CMOS settings during the first boot, since there was no checksum in prior releases. Heads will restore the automatic power-on setting during init based on config.user. Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>
23 lines
620 B
Bash
Executable File
23 lines
620 B
Bash
Executable File
#!/bin/bash
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# Set the EC BRAM setting for automatic power-on.
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# If $1 is 'y', enable automatic power-on. Otherwise, disable it.
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# EC BRAM bank 1
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BRAMADDR=0x360
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BRAMDATA=0x361
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if [ "$1" = "y" ]; then
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BRAM_VALUE="0x00" # 0 -> automatic power-on
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else
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BRAM_VALUE="0x01" # 1 -> stay off
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fi
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outb "$BRAMADDR" 0x29 # Select byte at offset 29h
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outb "$BRAMDATA" "$BRAM_VALUE"
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# There's also a 16-bit checksum at offset 3eh in bank 1. The only byte
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# included in the checksum is the automatic power-on setting, so the value is
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# the same, and the upper 8 bits remain 0.
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outb "$BRAMADDR" 0x3e
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outb "$BRAMDATA" "$BRAM_VALUE"
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