powerpc/pci: Use common PHB resource hookup
The 32-bit and 64-bit powerpc PCI code used to set up the resource
pointers of the root bus of a given PHB in completely different
places.
This unifies this in large part, by making 32-bit use a routine very
similar to what 64-bit does when initially scanning the PCI busses.
The actual setup of the PHB resources itself is then moved to a
common function in pci-common.c.
This should cause no functional change on 64-bit. On 32-bit, the
effect is that the PHB resources are going to be setup a bit earlier,
instead of being setup from pcibios_fixup_bus().
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 09ac98e..6d46bfa 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -1421,3 +1421,61 @@
return pci_enable_resources(dev, mask);
}
+
+void __devinit pcibios_setup_phb_resources(struct pci_controller *hose)
+{
+ struct pci_bus *bus = hose->bus;
+ struct resource *res;
+ int i;
+
+ /* Hookup PHB IO resource */
+ bus->resource[0] = res = &hose->io_resource;
+
+ if (!res->flags) {
+ printk(KERN_WARNING "PCI: I/O resource not set for host"
+ " bridge %s (domain %d)\n",
+ hose->dn->full_name, hose->global_number);
+#ifdef CONFIG_PPC32
+ /* Workaround for lack of IO resource only on 32-bit */
+ res->start = (unsigned long)hose->io_base_virt - isa_io_base;
+ res->end = res->start + IO_SPACE_LIMIT;
+ res->flags = IORESOURCE_IO;
+#endif /* CONFIG_PPC32 */
+ }
+
+ pr_debug("PCI: PHB IO resource = %016llx-%016llx [%lx]\n",
+ (unsigned long long)res->start,
+ (unsigned long long)res->end,
+ (unsigned long)res->flags);
+
+ /* Hookup PHB Memory resources */
+ for (i = 0; i < 3; ++i) {
+ res = &hose->mem_resources[i];
+ if (!res->flags) {
+ if (i > 0)
+ continue;
+ printk(KERN_ERR "PCI: Memory resource 0 not set for "
+ "host bridge %s (domain %d)\n",
+ hose->dn->full_name, hose->global_number);
+#ifdef CONFIG_PPC32
+ /* Workaround for lack of MEM resource only on 32-bit */
+ res->start = hose->pci_mem_offset;
+ res->end = (resource_size_t)-1LL;
+ res->flags = IORESOURCE_MEM;
+#endif /* CONFIG_PPC32 */
+ }
+ bus->resource[i+1] = res;
+
+ pr_debug("PCI: PHB MEM resource %d = %016llx-%016llx [%lx]\n", i,
+ (unsigned long long)res->start,
+ (unsigned long long)res->end,
+ (unsigned long)res->flags);
+ }
+
+ pr_debug("PCI: PHB MEM offset = %016llx\n",
+ (unsigned long long)hose->pci_mem_offset);
+ pr_debug("PCI: PHB IO offset = %08lx\n",
+ (unsigned long)hose->io_base_virt - _IO_BASE);
+
+}
+