1 files changed, 25 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/psycho_common.h b/arch/sparc64/kernel/psycho_common.h
index b53aa8dcad2c..092c278ef28d 100644
--- a/arch/sparc64/kernel/psycho_common.h
+++ b/arch/sparc64/kernel/psycho_common.h
@@ -1,6 +1,31 @@
 #ifndef _PSYCHO_COMMON_H
 #define _PSYCHO_COMMON_H
 
+/* U2P Programmer's Manual, page 13-55, configuration space
+ * address format:
+ * 
+ *  32             24 23 16 15    11 10       8 7   2  1 0
+ * ---------------------------------------------------------
+ * |0 0 0 0 0 0 0 0 1| bus | device | function | reg | 0 0 |
+ * ---------------------------------------------------------
+ */
+#define PSYCHO_CONFIG_BASE(PBM)	\
+	((PBM)->config_space | (1UL << 24))
+#define PSYCHO_CONFIG_ENCODE(BUS, DEVFN, REG)	\
+	(((unsigned long)(BUS)   << 16) |	\
+	 ((unsigned long)(DEVFN) << 8)  |	\
+	 ((unsigned long)(REG)))
+
+static inline void *psycho_pci_config_mkaddr(struct pci_pbm_info *pbm,
+					     unsigned char bus,
+					     unsigned int devfn,
+					     int where)
+{
+	return (void *)
+		(PSYCHO_CONFIG_BASE(pbm) |
+		 PSYCHO_CONFIG_ENCODE(bus, devfn, where));
+}
+
 enum psycho_error_type {
 	UE_ERR, CE_ERR, PCI_ERR
 };