[coreboot] How to get support for amd southbridge rs780l

[Alexey Borovikov]

Hi, I porting Coreboot on the motherboard Asus m5a78l-m lx3 (AMD Fam10h + 760G (RS780L).
I cant set the correct memory map and launch the internal graphics core. I think the problem is an incorrect initialization Southbridge RS780L and gfx. The lack of documentation on the chipset RS780L and the source code to initialize it makes it impossible to complete the porting. 
How can I get support from AMD, get documentation or source code for initialize Southbridge RS780L and gfx?
All thanks!
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