Setting bit 1 of ISA bridge register 4F does a system reset. I have these lines instead of /sbin/reboot in /etc/init.d/reboot (Debian system).
sleep 1 setpci -s 0:11.0 4f.b=9
From the datasheet:
Via VT8231 fn 0 Offset 4F –PCI Bus and CPU Interface Control ..........RW ----------------------------------------------------------
7-4 Reserved ................always reads 0 3 CPU Reset Source 0 Use CPURST as CPU Reset..default 1 Use INIT# as CPU Reset 2 Config Command Reg Rx04 Access (Test Only) 0 Normal:Bits 0-1=RO,Bit 3=RW...default 1 Test Mode:Bits 0-1=RW,Bit-3=RO 1 IRDY #Wait States 0 0 Wait States.............default 1 1 WaitState 0 Software PCI Reset ...write 1 to generate PCI reset
What about the ACPI I/O space (set same as Award BIOS, I think, 0x4000), in particular 0x4002, 0x4003? Anyway this can be used?
-Steve
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