diff options
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/intel/haswell/Kconfig | 3 | ||||
| -rw-r--r-- | src/cpu/intel/haswell/Makefile.inc | 3 | ||||
| -rw-r--r-- | src/cpu/intel/haswell/tsc_freq.c | 31 |
3 files changed, 36 insertions, 1 deletions
diff --git a/src/cpu/intel/haswell/Kconfig b/src/cpu/intel/haswell/Kconfig index 13861f9185..152059fcbe 100644 --- a/src/cpu/intel/haswell/Kconfig +++ b/src/cpu/intel/haswell/Kconfig @@ -8,7 +8,8 @@ config CPU_SPECIFIC_OPTIONS def_bool y select SMP select SSE2 - select UDELAY_LAPIC + select UDELAY_TSC + select TSC_CONSTANT_RATE select SMM_TSEG select SMM_MODULES select RELOCATABLE_MODULES diff --git a/src/cpu/intel/haswell/Makefile.inc b/src/cpu/intel/haswell/Makefile.inc index 90ffd66699..60c061ddd7 100644 --- a/src/cpu/intel/haswell/Makefile.inc +++ b/src/cpu/intel/haswell/Makefile.inc @@ -1,7 +1,9 @@ ramstage-y += haswell_init.c subdirs-y += ../../x86/name ramstage-y += mp_init.c +ramstage-y += tsc_freq.c romstage-y += romstage.c +romstage-y += tsc_freq.c ramstage-$(CONFIG_GENERATE_ACPI_TABLES) += acpi.c ramstage-$(CONFIG_HAVE_SMI_HANDLER) += smmrelocate.c @@ -10,6 +12,7 @@ ramstage-$(CONFIG_MONOTONIC_TIMER_MSR) += monotonic_timer.c cpu_microcode-$(CONFIG_CPU_MICROCODE_CBFS_GENERATE) += microcode_blob.c smm-$(CONFIG_HAVE_SMI_HANDLER) += finalize.c +smm-$(CONFIG_HAVE_SMI_HANDLER) += tsc_freq.c cpu_incs += $(src)/cpu/intel/haswell/cache_as_ram.inc diff --git a/src/cpu/intel/haswell/tsc_freq.c b/src/cpu/intel/haswell/tsc_freq.c new file mode 100644 index 0000000000..0a7805319d --- /dev/null +++ b/src/cpu/intel/haswell/tsc_freq.c @@ -0,0 +1,31 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <stdint.h> +#include <cpu/x86/msr.h> +#include <cpu/x86/tsc.h> +#include "cpu/intel/haswell/haswell.h" + +unsigned long tsc_freq_mhz(void) +{ + msr_t platform_info; + + platform_info = rdmsr(MSR_PLATFORM_INFO); + return HASWELL_BCLK * ((platform_info.lo >> 8) & 0xff); +} |