diff options
Diffstat (limited to 'arch/powerpc/kernel/pci_32.c')
| -rw-r--r-- | arch/powerpc/kernel/pci_32.c | 42 |
1 files changed, 34 insertions, 8 deletions
diff --git a/arch/powerpc/kernel/pci_32.c b/arch/powerpc/kernel/pci_32.c index dfb165802529..beb6f0447d16 100644 --- a/arch/powerpc/kernel/pci_32.c +++ b/arch/powerpc/kernel/pci_32.c @@ -35,6 +35,9 @@ unsigned long isa_io_base = 0; unsigned long pci_dram_offset = 0; int pcibios_assign_bus_offset = 1; +/* Default PCI flags is 0 */ +unsigned int ppc_pci_flags; + void pcibios_make_OF_bus_map(void); static void pcibios_fixup_resources(struct pci_dev* dev); @@ -48,7 +51,7 @@ static u8* pci_to_OF_bus_map; /* By default, we don't re-assign bus numbers. We do this only on * some pmacs */ -int pci_assign_all_buses; +static int pci_assign_all_buses; LIST_HEAD(hose_list); @@ -174,6 +177,14 @@ void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res, } EXPORT_SYMBOL(pcibios_bus_to_resource); +static int skip_isa_ioresource_align(struct pci_dev *dev) +{ + if ((ppc_pci_flags & PPC_PCI_CAN_SKIP_ISA_ALIGN) && + !(dev->bus->bridge_ctl & PCI_BRIDGE_CTL_ISA)) + return 1; + return 0; +} + /* * We need to avoid collisions with `mirrored' VGA ports * and other strange ISA hardware, so we always want the @@ -195,6 +206,8 @@ void pcibios_align_resource(void *data, struct resource *res, if (res->flags & IORESOURCE_IO) { resource_size_t start = res->start; + if (skip_isa_ioresource_align(dev)) + return; if (start & 0x300) { start = (start + 0x3ff) & ~0x3ff; res->start = start; @@ -251,8 +264,13 @@ pcibios_allocate_bus_resources(struct list_head *bus_list) continue; if (bus->parent == NULL) pr = (res->flags & IORESOURCE_IO)? - &ioport_resource: &iomem_resource; + &ioport_resource : &iomem_resource; else { + /* Don't bother with non-root busses when + * re-assigning all resources. + */ + if (ppc_pci_flags & PPC_PCI_REASSIGN_ALL_RSRC) + continue; pr = pci_find_parent_resource(bus->self, res); if (pr == res) { /* this happens when the generic PCI @@ -720,6 +738,9 @@ pcibios_init(void) printk(KERN_INFO "PCI: Probing PCI hardware\n"); + if (ppc_pci_flags & PPC_PCI_REASSIGN_ALL_BUS) + pci_assign_all_buses = 1; + /* Scan all of the recorded PCI controllers. */ list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { if (pci_assign_all_buses) @@ -746,13 +767,18 @@ pcibios_init(void) if (ppc_md.pcibios_fixup) ppc_md.pcibios_fixup(); - /* Allocate and assign resources */ + /* Allocate and assign resources. If we re-assign everything, then + * we skip the allocate phase + */ pcibios_allocate_bus_resources(&pci_root_buses); - pcibios_allocate_resources(0); - pcibios_allocate_resources(1); - - DBG("PCI: Assigning unassigned resouces...\n"); - pci_assign_unassigned_resources(); + if (!(ppc_pci_flags & PPC_PCI_REASSIGN_ALL_RSRC)) { + pcibios_allocate_resources(0); + pcibios_allocate_resources(1); + } + if (!(ppc_pci_flags & PPC_PCI_PROBE_ONLY)) { + DBG("PCI: Assigning unassigned resouces...\n"); + pci_assign_unassigned_resources(); + } /* Call machine dependent post-init code */ if (ppc_md.pcibios_after_init) |