[PATCH 6/8] powerpc/boot: Add mfdcrx
From: Tony Breeds <hidden>
Date: 2011-12-01 07:39:22
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
Needed for currituck support. Signed-off-by: Tony Breeds <redacted> --- arch/powerpc/boot/dcr.h | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) I chose to use a #define to keep with the style of m[tf]dcr in the same file.
diff --git a/arch/powerpc/boot/dcr.h b/arch/powerpc/boot/dcr.h
index 645a7c9..cc73f7a 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) : "r"(rn)); \ + rval; \ + }) /* 440GP/440GX SDRAM controller DCRs */ #define DCRN_SDRAM0_CFGADDR 0x010
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1.7.6.4