Lee Leahy (leroy.p.leahy@intel.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/18002
-gerrit
commit 70a20a93f1565f8882a0b0d997ff3b20fc241949 Author: Lee Leahy leroy.p.leahy@intel.com Date: Sat Dec 31 08:21:56 2016 -0800
soc/intel/quark: Add monotonic timer support
Add the Kconfig value HAVE_MONOTONIC_TIMER and the routine to read the TSC for the monotonic timer. Simplify the routine to get the TSC frequency.
TEST=Build and run on Galileo Gen2
Change-Id: I806fb864b01e39277bf2d6276254b0543930c2f6 Signed-off-by: Lee Leahy leroy.p.leahy@intel.com --- src/soc/intel/quark/Kconfig | 1 + src/soc/intel/quark/tsc_freq.c | 16 +++++++--------- 2 files changed, 8 insertions(+), 9 deletions(-)
diff --git a/src/soc/intel/quark/Kconfig b/src/soc/intel/quark/Kconfig index c5efd4a..8182caa 100644 --- a/src/soc/intel/quark/Kconfig +++ b/src/soc/intel/quark/Kconfig @@ -29,6 +29,7 @@ config CPU_SPECIFIC_OPTIONS select BOOTBLOCK_SAVE_BIST_AND_TIMESTAMP select C_ENVIRONMENT_BOOTBLOCK select HAVE_HARD_RESET + select HAVE_MONOTONIC_TIMER select NO_MMCONF_SUPPORT select REG_SCRIPT select RELOCATABLE_RAMSTAGE diff --git a/src/soc/intel/quark/tsc_freq.c b/src/soc/intel/quark/tsc_freq.c index eb8c46e..e6d0369 100644 --- a/src/soc/intel/quark/tsc_freq.c +++ b/src/soc/intel/quark/tsc_freq.c @@ -17,20 +17,18 @@ #include <stdint.h> #include <cpu/x86/msr.h> #include <cpu/x86/tsc.h> +#include <timer.h>
-static unsigned long bus_freq_khz(void) +unsigned long tsc_freq_mhz(void) { /* CPU freq = 400 MHz */ - return 400 * 1000; + return 400; }
-unsigned long tsc_freq_mhz(void) +void timer_monotonic_get(struct mono_time *mt) { - /* assume ratio=1 */ - unsigned bclk_khz = bus_freq_khz(); - - if (!bclk_khz) - return 0; + uint64_t tsc_value;
- return (bclk_khz * 1) / 1000; + tsc_value = rdtscll(); + mt->microseconds = tsc_value / tsc_freq_mhz(); }