diff options
| author | Aaron Durbin <adurbin@chromium.org> | 2012-11-12 10:14:55 -0600 |
|---|---|---|
| committer | Ronald G. Minnich <rminnich@gmail.com> | 2013-03-14 05:07:21 +0100 |
| commit | b9adf7ba4bf6e8f11bf174973230c5317cbb3b6d (patch) | |
| tree | 6dedc4658f2ec9ca30edd70277f86e57aef1112d /src | |
| parent | f6933a6f56f8bdc7e249b6629824acce646d5f6a (diff) | |
haswell: use #defines for constants in udelay.c
Change the hard coded values in udelay.c to use the #defines
for MSRs and BCLK.
Change-Id: I2bbeb0b478d2e3ca155e8f82006df86c29a4f018
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/2629
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/northbridge/intel/haswell/udelay.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/src/northbridge/intel/haswell/udelay.c b/src/northbridge/intel/haswell/udelay.c index 864e83915c..f5d541e8e1 100644 --- a/src/northbridge/intel/haswell/udelay.c +++ b/src/northbridge/intel/haswell/udelay.c @@ -21,10 +21,7 @@ #include <stdint.h> #include <cpu/x86/tsc.h> #include <cpu/x86/msr.h> - -/** - * Intel SandyBridge/IvyBridge CPUs always run the TSC at BCLK=100MHz - */ +#include "cpu/intel/haswell/haswell.h" /* Simple 32- to 64-bit multiplication. Uses 16-bit words to avoid overflow. */ static inline void multiply_to_tsc(tsc_t *const tsc, const u32 a, const u32 b) @@ -42,13 +39,13 @@ void udelay(u32 us) u32 dword; tsc_t tsc, tsc1, tscd; msr_t msr; - u32 fsb = 100, divisor; + u32 divisor; u32 d; /* ticks per us */ - msr = rdmsr(0xce); + msr = rdmsr(MSR_PLATFORM_INFO); divisor = (msr.lo >> 8) & 0xff; - d = fsb * divisor; /* On Core/Core2 this is divided by 4 */ + d = HASWELL_BCLK * divisor; multiply_to_tsc(&tscd, us, d); tsc1 = rdtsc(); |