diff options
Diffstat (limited to 'cpu/ppc4xx/4xx_pci.c')
-rw-r--r-- | cpu/ppc4xx/4xx_pci.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/cpu/ppc4xx/4xx_pci.c b/cpu/ppc4xx/4xx_pci.c index 31ca85dc555..33dd743aecb 100644 --- a/cpu/ppc4xx/4xx_pci.c +++ b/cpu/ppc4xx/4xx_pci.c @@ -87,6 +87,20 @@ DECLARE_GLOBAL_DATA_PTR; */ int __pci_pre_init(struct pci_controller *hose) { +#if defined (CONFIG_405EP) + /* + * Enable the internal PCI arbiter by default. + * + * On 405EP CPUs the internal arbiter can be controlled + * by the I2C strapping EEPROM. If you want to do so + * or if you want to disable the arbiter pci_pre_init() + * must be reimplemented without enabling the arbiter. + * The arbiter is enabled in this place because of + * compatibility reasons. + */ + mtdcr(cpc0_pci, mfdcr(cpc0_pci) | CPC0_PCI_ARBIT_EN); +#endif /* CONFIG_405EP */ + return 1; } int pci_pre_init(struct pci_controller *hose) __attribute__((weak, alias("__pci_pre_init"))); |