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essence-os
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Use 0xcf9 write for system reset 

It's probably the most bulletproof way on modern systems. Old 0x64 writes
does nothing on some systems
This commit is contained in:
Vladimir Serbinenko 2025-02-25 11:22:54 +03:00
parent 0a70170952
commit caf377abcf
2 changed files with 8 additions and 0 deletions
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4
arch/x86_32/kernel.s
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@ -470,6 +470,10 @@ ProcessorIn32:
ret ret
ProcessorReset: ProcessorReset:
mov al, 0xe
mov dx, 0xcf9
out dx, al
in al,0x64 in al,0x64
test al,2 test al,2
jne ProcessorReset jne ProcessorReset

4
arch/x86_64/kernel.s
View File

@ -780,6 +780,10 @@ MMArchSafeCopy:
ret ret
ProcessorReset: ProcessorReset:
mov al, 0xe
mov dx, 0xcf9
out dx, al
in al,0x64 in al,0x64
test al,2 test al,2
jne ProcessorReset jne ProcessorReset