[U-Boot] [PATCH] ppc4xx: Move 405EP pci code from cpu_init_f() to __pci_pre_init()

[Stefan Roese]

On Wednesday 08 July 2009 13:43:55 Matthias Fuchs wrote:
> This patch moves some basic PCI initialisation from the 4xx cpu_init_f()
> to cpu/ppc4xx/4xx_pci.c.
>
> The original cpu_init_f() function enabled the 405EP's internal arbiter
> in all situations. Also the HCE bit in cpc0_pci is always set.
> The first is not really wanted for PCI adapter designs and the latter
> is a general bug for PCI adapter U-Boots. Because it enables
> PCI configuration by the system CPU even when the PCI configuration has
> not been setup by the 405EP. The one and only correct place is
> in pci_405gp_init() (see "Set HCE bit" comment).
>
> So for compatibility reasons the arbiter is still enabled in any case,
> but from weak pci_pre_init() so that it can be replaced by board specific
> code.
>
> Signed-off-by: Matthias Fuchs <matthias.fuchs at esd.eu>

Applied to u-boot-ppc4xx. Thanks.

Best regards,
Stefan

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