summaryrefslogtreecommitdiff
path: root/MdePkg/Library/BaseMemoryLibSse2/SetMem32Wrapper.c
diff options
context:
space:
mode:
authorStar Zeng <star.zeng@intel.com>2016-08-17 10:08:31 +0800
committerStar Zeng <star.zeng@intel.com>2016-08-18 12:49:32 +0800
commit9430fb3e2a941439e06427558ba19bc7b39d8d49 (patch)
tree6a70eac8c48fe2b2efff937c915e1b48cec36dcb /MdePkg/Library/BaseMemoryLibSse2/SetMem32Wrapper.c
parent69f75ff0701e3907af7294f875a1a88528245dba (diff)
downloadedk2-platforms-9430fb3e2a941439e06427558ba19bc7b39d8d49.tar.xz
PcAtChipsetPkg AcpiTimerLib: Wait 363 ACPI timer counts to get TSC Freq
Compute the number of ticks to wait to measure TSC frequency. Instead of (ACPI_TIMER_FREQUENCY / 10000) = 357 and 357 * 10000 = 3570000, use 363 * 9861 = 3579543 Hz which is within 2 Hz of ACPI_TIMER_FREQUENCY. 363 counts is a calibration time of 101.4 uS. The idea comes from Michael and Paolo. Cc: Michael D Kinney <michael.d.kinney@intel.com> Cc: Liming Gao <liming.gao@intel.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Paul A Lohr <paul.a.lohr@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Star Zeng <star.zeng@intel.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com> (cherry picked from commit a012df5ec643a0c08c2b723a02919a5c9373ca74)
Diffstat (limited to 'MdePkg/Library/BaseMemoryLibSse2/SetMem32Wrapper.c')
0 files changed, 0 insertions, 0 deletions