diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kernel/of_platform.c | 10 | ||||
| -rw-r--r-- | arch/powerpc/kernel/pci_64.c | 23 |
2 files changed, 28 insertions, 5 deletions
diff --git a/arch/powerpc/kernel/of_platform.c b/arch/powerpc/kernel/of_platform.c index 84c34d979a8..d501c23e515 100644 --- a/arch/powerpc/kernel/of_platform.c +++ b/arch/powerpc/kernel/of_platform.c @@ -427,11 +427,13 @@ static int __devinit of_pci_phb_probe(struct of_device *dev, /* Process "ranges" property */ pci_process_bridge_OF_ranges(phb, dev->node, 0); - /* Setup IO space. - * This will not work properly for ISA IOs, something needs to be done - * about it if we ever generalize that way of probing PCI brigdes + /* Setup IO space. We use the non-dynamic version of that code here, + * which doesn't quite support unplugging. Next kernel release will + * have a better fix for this. + * Note also that we don't do ISA, this will also be fixed with a + * more massive rework. */ - pci_setup_phb_io_dynamic(phb, 0); + pci_setup_phb_io(phb, 0); /* Init pci_dn data structures */ pci_devs_phb_init_dynamic(phb); diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c index b0409e19b1c..249cca27a9b 100644 --- a/arch/powerpc/kernel/pci_64.c +++ b/arch/powerpc/kernel/pci_64.c @@ -41,6 +41,7 @@ unsigned long pci_probe_only = 1; int pci_assign_all_buses = 0; +static int pci_initial_scan_done; static void fixup_resource(struct resource *res, struct pci_dev *dev); static void do_bus_setup(struct pci_bus *bus); @@ -604,6 +605,8 @@ static int __init pcibios_init(void) /* map in PCI I/O space */ phbs_remap_io(); + pci_initial_scan_done = 1; + printk(KERN_DEBUG "PCI: Probing PCI hardware done\n"); return 0; @@ -1042,13 +1045,16 @@ void __devinit pci_process_bridge_OF_ranges(struct pci_controller *hose, } } -void __init pci_setup_phb_io(struct pci_controller *hose, int primary) +void __devinit pci_setup_phb_io(struct pci_controller *hose, int primary) { unsigned long size = hose->pci_io_size; unsigned long io_virt_offset; struct resource *res; struct device_node *isa_dn; + if (size == 0) + return; + hose->io_base_virt = reserve_phb_iospace(size); DBG("phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n", hose->global_number, hose->io_base_phys, @@ -1069,6 +1075,15 @@ void __init pci_setup_phb_io(struct pci_controller *hose, int primary) res = &hose->io_resource; res->start += io_virt_offset; res->end += io_virt_offset; + + /* If this is called after the initial PCI scan, then we need to + * proceed to IO mappings now + */ + if (pci_initial_scan_done) + __ioremap_explicit(hose->io_base_phys, + (unsigned long)hose->io_base_virt, + hose->pci_io_size, + _PAGE_NO_CACHE | _PAGE_GUARDED); } void __devinit pci_setup_phb_io_dynamic(struct pci_controller *hose, @@ -1078,6 +1093,9 @@ void __devinit pci_setup_phb_io_dynamic(struct pci_controller *hose, unsigned long io_virt_offset; struct resource *res; + if (size == 0) + return; + hose->io_base_virt = __ioremap(hose->io_base_phys, size, _PAGE_NO_CACHE | _PAGE_GUARDED); DBG("phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n", @@ -1106,6 +1124,9 @@ static int get_bus_io_range(struct pci_bus *bus, unsigned long *start_phys, /* Root Bus */ res = &hose->io_resource; + if (res->end == 0 && res->start == 0) + return 1; + *start_virt = pci_io_base + res->start; *start_phys = *start_virt + hose->io_base_phys - (unsigned long) hose->io_base_virt; |