powerpc/boot: Add mfdcrx

Needed for currituck support. Signed-off-by: Tony Breeds <tony@bakeyournoodle.com> Signed-off-by: Josh Boyer <jwboyer@gmail.com>
git-mirror · Dec 9, 2011 · 075bcf5 · 075bcf5
1 parent e32a032
commit 075bcf5
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/arch/powerpc/boot/dcr.h b/arch/powerpc/boot/dcr.h
@@ -9,6 +9,12 @@
 	})
 #define mtdcr(rn, val) \
 	asm volatile("mtdcr %0,%1" : : "i"(rn), "r"(val))
+#define mfdcrx(rn) \
+	({	\
+		unsigned long rval; \
+		asm volatile("mfdcrx %0,%1" : "=r"(rval) : "r"(rn)); \
+		rval; \
+	})
 
 /* 440GP/440GX SDRAM controller DCRs */
 #define DCRN_SDRAM0_CFGADDR				0x010