• Matthias Fuchs's avatar
    ppc4xx: Move 405EP pci code from cpu_init_f() to __pci_pre_init() · 123f102e
    Matthias Fuchs authored
    
    
    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: default avatarMatthias Fuchs <matthias.fuchs@esd.eu>
    Signed-off-by: default avatarStefan Roese <sr@denx.de>
    123f102e
cpu_init.c 9.62 KB