[POWERPC] pci32: Add flags modifying the PCI code behaviour

This adds to the 32 bits PCI code some flags, replacing the old
pci_assign_all_busses global, that allow us to control various
aspects of the PCI probing, such as whether to re-assign all
resources or not, or to not try to assign anything at all.

This also adds the flag x86 already has to avoid ISA alignment
on bridges that don't have ISA forwarding enabled (no legacy
devices on the top level bus) and sets it for PowerMacs.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

5 files changed, 9 insertions, 6 deletions

diff --git a/arch/powerpc/platforms/52xx/mpc52xx_pci.c b/arch/powerpc/platforms/52xx/mpc52xx_pci.c
index 4c6c82a684b..262eda8659d 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_pci.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_pci.c
@@ -363,7 +363,7 @@ mpc52xx_add_bridge(struct device_node *node)
 
 	pr_debug("Adding MPC52xx PCI host bridge %s\n", node->full_name);
 
-	pci_assign_all_buses = 1;
+	ppc_pci_flags |= PPC_PCI_REASSIGN_ALL_BUS;
 
 	if (of_address_to_resource(node, 0, &rsrc) != 0) {
 		printk(KERN_ERR "Can't get %s resources\n", node->full_name);
diff --git a/arch/powerpc/platforms/82xx/pq2.c b/arch/powerpc/platforms/82xx/pq2.c
index 11d1db8bb09..1b75902fad6 100644
--- a/arch/powerpc/platforms/82xx/pq2.c
+++ b/arch/powerpc/platforms/82xx/pq2.c
@@ -53,7 +53,7 @@ static void __init pq2_pci_add_bridge(struct device_node *np)
 	if (of_address_to_resource(np, 0, &r) || r.end - r.start < 0x10b)
 		goto err;
 
-	pci_assign_all_buses = 1;
+	ppc_pci_flags |= PPC_PCI_REASSIGN_ALL_BUS;
 
 	hose = pcibios_alloc_controller(np);
 	if (!hose)
diff --git a/arch/powerpc/platforms/83xx/pci.c b/arch/powerpc/platforms/83xx/pci.c
index 80425d7b14f..14f1080c6c9 100644
--- a/arch/powerpc/platforms/83xx/pci.c
+++ b/arch/powerpc/platforms/83xx/pci.c
@@ -54,7 +54,7 @@ int __init mpc83xx_add_bridge(struct device_node *dev)
 		       " bus 0\n", dev->full_name);
 	}
 
-	pci_assign_all_buses = 1;
+	ppc_pci_flags |= PPC_PCI_REASSIGN_ALL_BUS;
 	hose = pcibios_alloc_controller(dev);
 	if (!hose)
 		return -ENOMEM;
diff --git a/arch/powerpc/platforms/chrp/pci.c b/arch/powerpc/platforms/chrp/pci.c
index 0340a342f77..d51f83aeef7 100644
--- a/arch/powerpc/platforms/chrp/pci.c
+++ b/arch/powerpc/platforms/chrp/pci.c
@@ -198,7 +198,7 @@ static void __init setup_peg2(struct pci_controller *hose, struct device_node *d
 		printk ("RTAS supporting Pegasos OF not found, please upgrade"
 			" your firmware\n");
 	}
-	pci_assign_all_buses = 1;
+	ppc_pci_flags |= PPC_PCI_REASSIGN_ALL_BUS;
 	/* keep the reference to the root node */
 }
 
diff --git a/arch/powerpc/platforms/powermac/pci.c b/arch/powerpc/platforms/powermac/pci.c
index 589c613bcd3..a2e9b36f61e 100644
--- a/arch/powerpc/platforms/powermac/pci.c
+++ b/arch/powerpc/platforms/powermac/pci.c
@@ -725,7 +725,7 @@ static void __init setup_bandit(struct pci_controller *hose,
 static int __init setup_uninorth(struct pci_controller *hose,
 				 struct resource *addr)
 {
-	pci_assign_all_buses = 1;
+	ppc_pci_flags |= PPC_PCI_REASSIGN_ALL_BUS;
 	has_uninorth = 1;
 	hose->ops = &macrisc_pci_ops;
 	hose->cfg_addr = ioremap(addr->start + 0x800000, 0x1000);
@@ -994,6 +994,9 @@ void __init pmac_pci_init(void)
 	struct device_node *np, *root;
 	struct device_node *ht = NULL;
 
+#ifdef CONFIG_PPC32
+	ppc_pci_flags = PPC_PCI_CAN_SKIP_ISA_ALIGN;
+#endif
 	root = of_find_node_by_path("/");
 	if (root == NULL) {
 		printk(KERN_CRIT "pmac_pci_init: can't find root "
@@ -1051,7 +1054,7 @@ void __init pmac_pci_init(void)
 	 * some offset between bus number and domains for now when we
 	 * assign all busses should help for now
 	 */
-	if (pci_assign_all_buses)
+	if (ppc_pci_flags & PPC_PCI_REASSIGN_ALL_BUS)
 		pcibios_assign_bus_offset = 0x10;
 #endif
 }