[POWERPC] 4xx: PLB to PCI Express support
This adds to the previous 2 patches the support for the 4xx PCI Express cells as found in the 440SPe revA, revB and 405EX. Unfortunately, due to significant differences between these, and other interesting "features" of those pieces of HW, the code isn't as simple as it is for PCI and PCI-X and some of the functions differ significantly between the 3 implementations. Thus, not only this code can only support those 3 implementations for now and will refuse to operate on any other, but there are added ifdef's to avoid the bloat of building a fairly large amount of code on platforms that don't need it. Also, this code currently only supports fully initializing root complex nodes, not endpoint. Some more code will have to be lifted from the arch/ppc implementation to add the endpoint support, though it's mostly differences in memory mapping, and the question on how to represent endpoint mode PCI in the device-tree is thus open. Many thanks to Stefan Roese for testing & fixing up the 405EX bits ! Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NStefan Roese <sr@denx.de> Signed-off-by: NJosh Boyer <jwboyer@linux.vnet.ibm.com>
Showing
arch/powerpc/sysdev/Kconfig
0 → 100644
想要评论请 注册 或 登录