Hi,
I've reverse engineered some registers in the CK804. I believe with this information all SATA ports can be enabled without any lost interrupts.
More on fixing the SATA issue later on, now what I've found.
----
LPC bridge PCI config registers:
0x7c:0x0000ffff - bitmap of masked pci irqs? - PIRQ[ABCD] possibly?
0x7c:0x00f00000 - sata at f8 - port 1
0x7c:0x0f000000 - sata at f7 - port 1
0x80:0xf0000000 - sata at f7 - port 0
0x80:0x0f000000 - sata at f8 - port 0
0x80:0x0000f000 - EHCI
0x84:0x00000f00 - NIC
0x84:0x0000000f - OHCI
known values of nibbles:
0 - unrouted? 1 - irq 23 8 - irq 20 c - irq 12 d - irq 21 e - irq 14 f - irq 15
-----
When the interrupts of both SATA ports on each controller are routed the same, the regular drivers should work. I've only tested this with NetBSD's viaide(4), I have no idea if these may also apply to the ADMA mode.
On many boards these registers are set in mptable.c.
I hope someone can make good use of this.
Jonathan Kollasch