diff options
Diffstat (limited to 'src/cpu/amd/family_10h-family_15h/monotonic_timer.c')
-rw-r--r-- | src/cpu/amd/family_10h-family_15h/monotonic_timer.c | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/src/cpu/amd/family_10h-family_15h/monotonic_timer.c b/src/cpu/amd/family_10h-family_15h/monotonic_timer.c deleted file mode 100644 index 51244b83ae..0000000000 --- a/src/cpu/amd/family_10h-family_15h/monotonic_timer.c +++ /dev/null @@ -1,91 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * 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. - */ -#include <stdint.h> -#include <arch/cpu.h> -#include <cpu/x86/msr.h> -#include <cpu/amd/msr.h> -#include <timer.h> -#include <device/pci.h> -#include <device/pci_ops.h> -#include <northbridge/amd/amdht/AsPsDefs.h> - -static struct monotonic_counter { - int initialized; - uint32_t core_frequency; - struct mono_time time; - uint64_t last_value; -} mono_counter; - -static inline uint64_t read_counter_msr(void) -{ - msr_t counter_msr; - - counter_msr = rdmsr(TSC_MSR); - - return ((uint64_t)counter_msr.hi << 32) | (uint64_t)counter_msr.lo; -} - -static void init_timer(void) -{ - uint8_t model; - uint32_t cpuid_fms; - uint8_t cpufid; - uint8_t cpudid; - uint8_t boost_capable = 0; - - /* Get CPU model */ - cpuid_fms = cpuid_eax(0x80000001); - model = ((cpuid_fms & 0xf0000) >> 16) | ((cpuid_fms & 0xf0) >> 4); - - /* Get boost capability */ - if ((model == 0x8) || (model == 0x9)) { /* revision D */ - boost_capable = (pci_read_config32(pcidev_on_root(0x18, 4), - 0x15c) & 0x4) >> 2; - } - - /* Set up TSC (BKDG v3.62 section 2.9.4)*/ - msr_t msr = rdmsr(HWCR_MSR); - msr.lo |= 0x1000000; - wrmsr(HWCR_MSR, msr); - - /* Get core Pstate 0 frequency in MHz */ - msr = rdmsr(PSTATE_0_MSR + boost_capable); - cpufid = (msr.lo & 0x3f); - cpudid = (msr.lo & 0x1c0) >> 6; - mono_counter.core_frequency = (100 * (cpufid + 0x10)) / (0x01 << cpudid); - - mono_counter.last_value = read_counter_msr(); - mono_counter.initialized = 1; -} - -void timer_monotonic_get(struct mono_time *mt) -{ - uint64_t current_tick; - uint32_t usecs_elapsed = 0; - - if (!mono_counter.initialized) - init_timer(); - - current_tick = read_counter_msr(); - if (mono_counter.core_frequency != 0) - usecs_elapsed = (current_tick - mono_counter.last_value) / mono_counter.core_frequency; - - /* Update current time and tick values only if a full tick occurred. */ - if (usecs_elapsed) { - mono_time_add_usecs(&mono_counter.time, usecs_elapsed); - mono_counter.last_value = current_tick; - } - - /* Save result. */ - *mt = mono_counter.time; -} |