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>

1 files changed, 58 insertions, 0 deletions

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 @@ int pcibios_enable_device(struct pci_dev *dev, int mask)
 
 	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);
+
+}
+