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Re: [Qemu-ppc] [Qemu-devel] [PATCH 2/2] m48t59: add mem_base value to m4

From: Mark Cave-Ayland
Subject: Re: [Qemu-ppc] [Qemu-devel] [PATCH 2/2] m48t59: add mem_base value to m48t59_init_isa()
Date: Mon, 19 Jan 2015 16:57:11 +0000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Icedove/31.3.0

On 19/01/15 16:17, Artyom Tarasenko wrote:

>> Is there an "EBus bridge" PCI device similar to the PCI-to-ISA bridge?
> As physical devices there are integrated SBus-to-EBus and PCI-to-EBus bridges.
> But actually I may have been wrong about NVRAM always sitting on the
> EBus: looking at the page 28 of "UltraSPARC™-IIi User's Manual"
> (805-0087.pdf), I see that NVRAM, Serial and other controllers reside
> in a "PC compatible SuperIO" chip which sits on a PCI bus.

There's definitely a PCI device for a PCI-EBus bridge that we discover
during enumeration and attach to that (for example the EBus properties
in OpenBIOS can be found in the attach callback for the bridge PCI
device in drivers/pci.c).



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