[patch] Make SN2 PCI code use ioremap rather than manually mangle

[Jes Sorensen <jes@sgi.com>]

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Hi Tony,

This one changes the SN2 specific PCI drivers to use ioremap() for
obtaining the real address to access for the PCI registers instead of
manually calculating them with __IA64_UNCACHED_OFFSET.

The patch should have no real change when running on a normal Linux
kernel, but when running as a paravirtualized it is needed.

Thanks,
Jes


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Use ioremap() on SN2 specific PIC and TIO registers rather than
manually setting the __IA64_UNCACHED_OFFSET bits in the address we get
from the PROM.

Signed-off-by: Jes Sorensen <jes@sgi.com>

---
 arch/ia64/sn/pci/pcibr/pcibr_provider.c |    7 ++++---
 arch/ia64/sn/pci/tioca_provider.c       |    4 +++-
 arch/ia64/sn/pci/tioce_provider.c       |    4 +++-
 3 files changed, 10 insertions(+), 5 deletions(-)

Index: linux-2.6/arch/ia64/sn/pci/pcibr/pcibr_provider.c
===================================================================
--- linux-2.6.orig/arch/ia64/sn/pci/pcibr/pcibr_provider.c
+++ linux-2.6/arch/ia64/sn/pci/pcibr/pcibr_provider.c
@@ -15,6 +15,7 @@
 #include <asm/sn/pcibus_provider_defs.h>
 #include <asm/sn/pcidev.h>
 #include <asm/sn/sn_sal.h>
+#include <asm/sn/pic.h>
 #include <asm/sn/sn2/sn_hwperf.h>
 #include "xtalk/xwidgetdev.h"
 #include "xtalk/hubdev.h"
@@ -130,9 +131,9 @@ pcibr_bus_fixup(struct pcibus_bussoft *p
 	}
 
 	memcpy(soft, prom_bussoft, sizeof(struct pcibus_info));
-	soft->pbi_buscommon.bs_base =
-	    (((u64) soft->pbi_buscommon.
-	      bs_base << 4) >> 4) | __IA64_UNCACHED_OFFSET;
+	soft->pbi_buscommon.bs_base = (unsigned long)
+		ioremap(REGION_OFFSET(soft->pbi_buscommon.bs_base),
+			sizeof(struct pic));
 
 	spin_lock_init(&soft->pbi_lock);
 
Index: linux-2.6/arch/ia64/sn/pci/tioca_provider.c
===================================================================
--- linux-2.6.orig/arch/ia64/sn/pci/tioca_provider.c
+++ linux-2.6/arch/ia64/sn/pci/tioca_provider.c
@@ -610,7 +610,9 @@ tioca_bus_fixup(struct pcibus_bussoft *p
 		return NULL;
 
 	memcpy(tioca_common, prom_bussoft, sizeof(struct tioca_common));
-	tioca_common->ca_common.bs_base |= __IA64_UNCACHED_OFFSET;
+	tioca_common->ca_common.bs_base = (unsigned long)
+		ioremap(REGION_OFFSET(tioca_common->ca_common.bs_base),
+			sizeof(struct tioca_common));
 
 	/* init kernel-private area */
 
Index: linux-2.6/arch/ia64/sn/pci/tioce_provider.c
===================================================================
--- linux-2.6.orig/arch/ia64/sn/pci/tioce_provider.c
+++ linux-2.6/arch/ia64/sn/pci/tioce_provider.c
@@ -1002,7 +1002,9 @@ tioce_bus_fixup(struct pcibus_bussoft *p
 		return NULL;
 
 	memcpy(tioce_common, prom_bussoft, sizeof(struct tioce_common));
-	tioce_common->ce_pcibus.bs_base |= __IA64_UNCACHED_OFFSET;
+	tioce_common->ce_pcibus.bs_base = (unsigned long)
+		ioremap(REGION_OFFSET(tioce_common->ce_pcibus.bs_base),
+			sizeof(struct tioce_common));
 
 	tioce_kern = tioce_kern_init(tioce_common);
 	if (tioce_kern == NULL) {