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| author | Tony Breeds <tony@bakeyournoodle.com> | 2011-11-30 21:39:22 +0000 |
|---|---|---|
| committer | Josh Boyer <jwboyer@gmail.com> | 2011-12-09 07:49:50 -0500 |
| commit | 075bcf5879225d0c2a119c23d8046b890e051e81 (patch) | |
| tree | f6b3bb02bd859cd1ff7d8603296079e011ed5033 /arch/powerpc/boot/dcr.h | |
| parent | e32a03290c72773c304ffeebffed0a63c0a672ae (diff) | |
| download | lwn-075bcf5879225d0c2a119c23d8046b890e051e81.tar.gz lwn-075bcf5879225d0c2a119c23d8046b890e051e81.zip | |
powerpc/boot: Add mfdcrx
Needed for currituck support.
Signed-off-by: Tony Breeds <tony@bakeyournoodle.com>
Signed-off-by: Josh Boyer <jwboyer@gmail.com>
Diffstat (limited to 'arch/powerpc/boot/dcr.h')
| -rw-r--r-- | 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 645a7c964e5f..cc73f7a95e26 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 |