[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>

1 files changed, 20 insertions, 0 deletions

diff --git a/include/asm-powerpc/pci-bridge.h b/include/asm-powerpc/pci-bridge.h
index 8245e84836c9..2972f0d3afaa 100644
--- a/include/asm-powerpc/pci-bridge.h
+++ b/include/asm-powerpc/pci-bridge.h
@@ -13,6 +13,26 @@
 
 struct device_node;
 
+extern unsigned int ppc_pci_flags;
+enum {
+        /* Force re-assigning all resources (ignore firmware
+         * setup completely)
+         */
+        PPC_PCI_REASSIGN_ALL_RSRC       = 0x00000001,
+
+        /* Re-assign all bus numbers */
+        PPC_PCI_REASSIGN_ALL_BUS        = 0x00000002,
+
+        /* Do not try to assign, just use existing setup */
+        PPC_PCI_PROBE_ONLY              = 0x00000004,
+
+        /* Don't bother with ISA alignment unless the bridge has
+         * ISA forwarding enabled
+         */
+        PPC_PCI_CAN_SKIP_ISA_ALIGN      = 0x00000008,
+};
+
+
 /*
  * Structure of a PCI controller (host bridge)
  */