[PATCH] powerpc: Detect prefetchable windows in pci_process_bridge_OF_ranges

Added the ability to determine if an outbound window in the PCI host
controller is for prefetchable memory and report it as such.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 7 insertions, 1 deletions

diff --git a/arch/ppc/kernel/pci.c b/arch/ppc/kernel/pci.c
index af364003880b..8de320308e87 100644
--- a/arch/ppc/kernel/pci.c
+++ b/arch/ppc/kernel/pci.c
@@ -941,7 +941,7 @@ pci_process_bridge_OF_ranges(struct pci_controller *hose,
         while (ranges && (rlen -= np * sizeof(unsigned int)) >= 0) {
                 res = NULL;
                 size = ranges[na+4];
-                switch (ranges[0] >> 24) {
+                switch ((ranges[0] >> 24) & 0x3) {
                 case 1:         /* I/O space */
                         if (ranges[2] != 0)
                                 break;
@@ -955,6 +955,8 @@ pci_process_bridge_OF_ranges(struct pci_controller *hose,
                         res = &hose->io_resource;
                         res->flags = IORESOURCE_IO;
                         res->start = ranges[2];
+                        DBG("PCI: IO 0x%lx -> 0x%lx\n",
+                                    res->start, res->start + size - 1);
                         break;
                 case 2:         /* memory space */
                         memno = 0;
@@ -972,7 +974,11 @@ pci_process_bridge_OF_ranges(struct pci_controller *hose,
                         if (memno < 3) {
                                 res = &hose->mem_resources[memno];
                                 res->flags = IORESOURCE_MEM;
+                                if(ranges[0] & 0x40000000)
+                                        res->flags |= IORESOURCE_PREFETCH;
                                 res->start = ranges[na+2];
+                                DBG("PCI: MEM[%d] 0x%lx -> 0x%lx\n", memno,
+                                            res->start, res->start + size - 1);
                         }
                         break;
                 }