On 06/06/2011 11:53 PM, Arnd Bergmann wrote:
On Monday 06 June 2011 23:38:50 Hauke Mehrtens wrote:
Accessing chip common should be possible without scanning the hole bus
as it is at the first position and initializing most things just needs
chip common. For initializing the interrupts scanning is needed as we do
not know where the mips core is located.
As we can not use kalloc on early boot we could use a function which
uses kalloc under normal conditions and when on early boot the
architecture code which starts the bcma code should also provide a
function which returns a pointer to some memory in its text segment to
use. We need space for 16 cores in the architecture code.
In addition bcma_bus_register(struct bcma_bus *bus) has to be divided
into two parts. The first part will scan the bus and initialize chip
common and mips core. The second part will initialize pci core and
register the devices in the system. When using this under normal
conditions they will be called directly after each other.
Just split out the minimal low-level function from the bcma_bus_scan
then, to locate a single device based on some identifier. The
bcma_bus_scan() function can then repeatedly allocate one device
and pass it to the low-level function when doing the proper scan,
while the arch code calls the low-level function directly with static
data.
If going for this we should pass struct bcma_device_id as match
parameter as that identifies the core appropriately although you
probably only want to match manufacturer and core identifiers.
Gr. AvS
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