[PATCH] powerpc: Detect prefetchable windows in pci_process_bridge_OF_ranges

[Kumar Gala]

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 at kernel.crashing.org>

---
commit 6a050a749ac14613057a2adec0e3dbaa7697a824
tree 254dedb89aac5444c6d387bd1b6ef20c954538a5
parent 761e102769add7e86d510f7605c06f4a82575015
author Kumar Gala <galak at kernel.crashing.org> Tue, 13 Dec 2005 14:46:34 -0600
committer Kumar Gala <galak at kernel.crashing.org> Tue, 13 Dec 2005 14:46:34 -0600

 arch/ppc/kernel/pci.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/arch/ppc/kernel/pci.c b/arch/ppc/kernel/pci.c
index df4b11c..8a58fe8 100644
--- a/arch/ppc/kernel/pci.c
+++ b/arch/ppc/kernel/pci.c
@@ -941,7 +941,7 @@ pci_process_bridge_OF_ranges(struct pci_
 	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_
 			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_
 			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;
 		}