[PATCH 5/6] powerpc/boot: Add mfdcrx
From: Tony Breeds <hidden>
Date: 2011-11-30 05:23:59
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
Signed-off-by: Tony Breeds <redacted> --- arch/powerpc/boot/dcr.h | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/boot/dcr.h b/arch/powerpc/boot/dcr.h
index 645a7c9..51b5893 100644
--- 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) : "g"(rn)); \ + rval; \ + }) /* 440GP/440GX SDRAM controller DCRs */ #define DCRN_SDRAM0_CFGADDR 0x010
--
1.7.6.4