Re: [Qemu-devel] [Qemu-ppc] [PATCH: RFC] Adding BAR0 for e500 PCI controller

["Andreas Färber" <afaerber@suse.de>]

Am 11.09.2012 14:27, schrieb Alexander Graf:
> On 09/11/2012 02:23 PM, Andreas Färber wrote:
>> For a reference to another object a QOM link<> property would be
>> preferred over a static qdev property.
> 
> How does that work? Can we do RPC to other objects to access its CCSR
> and/or enumerate the CCSR size? Or maybe even receive its memory api block?

What I had in mind was something like:

typedef struct CCSRState {
    Object *parent; /* or DeviceState or whatever */

    MemoryRegion *ccsr_region;
} CCSRState;

#define CCSR(obj) OBJECT_CHECK(CCSRState, (obj), TYPE_CCSR)

MemoryRegion pci_ccsr_region;
CCSRState *ccsr = CCSR(pointer_from_link_property_or_path);

memory_region_init_alias(&pci_ccsr_region, "pci-ccsr",
ccsr->ccsr_region, 0, memory_region_size(ccsr->ccsr_region));

Andreas

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