Mike Banon has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/30987 )
Change subject: mb/asus: Add Asus A88XM-E FM2+ with documentation ......................................................................
Patch Set 45:
(1 comment)
https://review.coreboot.org/c/coreboot/+/30987/45/src/mainboard/asus/a88xm-e... File src/mainboard/asus/a88xm-e/OemCustomize.c:
https://review.coreboot.org/c/coreboot/+/30987/45/src/mainboard/asus/a88xm-e... PS45, Line 176: /* Set to 0x40 instead of 0xE0 to avoid the PCI resource allocation problems. */ : InitPost->MemConfig.BottomIo = 0x40; Here are the results of my today's research: 0xC0, 0xB0, 0xA0, 0x90, 0x80, 0x70, 0x60, 0x50, 0x40, 0x30, 0x28 - work great both with HD6670 and RX590 discrete GPU; 0x24, 0x20, 0x10, 0x00 - coreboot freezes before reaching a SeaBIOS. Although 0x28 works great on A88XM-E, this border value may fail on some other AGESA board. As I'm spreading this fix across the multiple AGESA boards and would like it to be the same value, I've decided to pick 0x40 for some extra safety.