From 49a6cba4eb165dba65221eea4d555ec8a7c85800 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Fri, 28 Oct 2011 16:27:38 -0600 Subject: powerpc/PCI: split PHB part out of pcibios_map_io_space() No functional change. This is so we can use pcibios_phb_map_io_space() before we have a struct pci_bus. v2: fix map io phb typo CC: Benjamin Herrenschmidt Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes --- arch/powerpc/kernel/pci_64.c | 40 +++++++++++++++++++++------------------- 1 file changed, 21 insertions(+), 19 deletions(-) (limited to 'arch/powerpc') diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c index bcf4bf9e72d9..3318d39b7d4c 100644 --- a/arch/powerpc/kernel/pci_64.c +++ b/arch/powerpc/kernel/pci_64.c @@ -131,30 +131,13 @@ EXPORT_SYMBOL_GPL(pcibios_unmap_io_space); #endif /* CONFIG_HOTPLUG */ -int __devinit pcibios_map_io_space(struct pci_bus *bus) +static int __devinit pcibios_map_phb_io_space(struct pci_controller *hose) { struct vm_struct *area; unsigned long phys_page; unsigned long size_page; unsigned long io_virt_offset; - struct pci_controller *hose; - - WARN_ON(bus == NULL); - - /* If this not a PHB, nothing to do, page tables still exist and - * thus HPTEs will be faulted in when needed - */ - if (bus->self) { - pr_debug("IO mapping for PCI-PCI bridge %s\n", - pci_name(bus->self)); - pr_debug(" virt=0x%016llx...0x%016llx\n", - bus->resource[0]->start + _IO_BASE, - bus->resource[0]->end + _IO_BASE); - return 0; - } - /* Get the host bridge */ - hose = pci_bus_to_host(bus); phys_page = _ALIGN_DOWN(hose->io_base_phys, PAGE_SIZE); size_page = _ALIGN_UP(hose->pci_io_size, PAGE_SIZE); @@ -198,11 +181,30 @@ int __devinit pcibios_map_io_space(struct pci_bus *bus) return 0; } + +int __devinit pcibios_map_io_space(struct pci_bus *bus) +{ + WARN_ON(bus == NULL); + + /* If this not a PHB, nothing to do, page tables still exist and + * thus HPTEs will be faulted in when needed + */ + if (bus->self) { + pr_debug("IO mapping for PCI-PCI bridge %s\n", + pci_name(bus->self)); + pr_debug(" virt=0x%016llx...0x%016llx\n", + bus->resource[0]->start + _IO_BASE, + bus->resource[0]->end + _IO_BASE); + return 0; + } + + return pcibios_map_phb_io_space(pci_bus_to_host(bus)); +} EXPORT_SYMBOL_GPL(pcibios_map_io_space); void __devinit pcibios_setup_phb_io_space(struct pci_controller *hose) { - pcibios_map_io_space(hose->bus); + pcibios_map_phb_io_space(hose); } #define IOBASE_BRIDGE_NUMBER 0 -- cgit v1.2.3