On 09/08/2011 06:49 AM, Rudolf Marek wrote:
Hi
>no clue how TPM works, never played with it so far... :)
Well as far I know it is just a LPC device (if it is 1,1 device), make
sure the region for that chip is decoded and enable
decoding of 0xfed0_0000 (sorry do not remember right range out of my
head) in chipset which is needed for special LPC cycles. That is all I
know. This special cycles have something in common with SKINIT or
maybe with TPM 1.2
A TPM 1.2 device has its mmio region at fed4 0000 - fed4 4fff. I am not
sure whether coreboot needs to program some other hardware to enable
that region but in Qemu with TPM device model SeaBIOS either did that or
it 'just worked'.
Stefan
http://www.informit.com/articles/article.aspx?p=1154764&seqNum=3
Thanks
Rudolf
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