diff options
Diffstat (limited to 'src/northbridge/intel/sandybridge/raminit_common.h')
| -rw-r--r-- | src/northbridge/intel/sandybridge/raminit_common.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/northbridge/intel/sandybridge/raminit_common.h b/src/northbridge/intel/sandybridge/raminit_common.h index 3f094d0f52..0015a09819 100644 --- a/src/northbridge/intel/sandybridge/raminit_common.h +++ b/src/northbridge/intel/sandybridge/raminit_common.h @@ -433,6 +433,12 @@ typedef struct ramctr_timing_st { #define MAX_CAS 18 #define MIN_CAS 4 +/* + * 1 QCLK (quarter of a clock cycle) equals 64 PI (phase interpolator) ticks. + * Logic delay values in I/O register bitfields are expressed in QCLKs. + */ +#define QCLK_PI 64 + #define MAKE_ERR ((channel << 16) | (slotrank << 8) | 1) #define GET_ERR_CHANNEL(x) (x >> 16) |