static void __setup_APIC_LVTT(unsigned int clocks) { unsigned int lvtt_value, tmp_value, ver; int cpu = smp_processor_id(); ver = GET_APIC_VERSION(apic_read(APIC_LVR)); lvtt_value = APIC_LVT_TIMER_PERIODIC | LOCAL_TIMER_VECTOR; if (!APIC_INTEGRATED(ver)) lvtt_value |= SET_APIC_TIMER_BASE(APIC_TIMER_BASE_DIV); if (cpu_isset(cpu, timer_bcast_ipi)) lvtt_value |= APIC_LVT_MASKED; apic_write_around(APIC_LVTT, lvtt_value); /* * Divide PICLK by 16 */ tmp_value = apic_read(APIC_TDCR); apic_write_around(APIC_TDCR, (tmp_value & ~(APIC_TDR_DIV_1 | APIC_TDR_DIV_TMBASE)) | APIC_TDR_DIV_16); apic_write_around(APIC_TMICT, clocks/APIC_DIVISOR); }
/* * This function sets up the local APIC timer, with a timeout of * 'clocks' APIC bus clock. During calibration we actually call * this function twice on the boot CPU, once with a bogus timeout * value, second time for real. The other (noncalibrating) CPUs * call this function only once, with the real, calibrated value. * * We do reads before writes even if unnecessary, to get around the * P5 APIC double write bug. */ static void __setup_APIC_LVTT(unsigned int clocks, int oneshot, int irqen) { unsigned int lvtt_value, tmp_value; lvtt_value = LOCAL_TIMER_VECTOR; if (!oneshot) lvtt_value |= APIC_LVT_TIMER_PERIODIC; if (!lapic_is_integrated()) lvtt_value |= SET_APIC_TIMER_BASE(APIC_TIMER_BASE_DIV); if (!irqen) lvtt_value |= APIC_LVT_MASKED; apic_write_around(APIC_LVTT, lvtt_value); /* * Divide PICLK by 16 */ tmp_value = apic_read(APIC_TDCR); apic_write_around(APIC_TDCR, (tmp_value & ~(APIC_TDR_DIV_1 | APIC_TDR_DIV_TMBASE)) | APIC_TDR_DIV_16); if (!oneshot) apic_write_around(APIC_TMICT, clocks/APIC_DIVISOR); }
void __setup_APIC_LVTT(unsigned int clocks) { unsigned int lvtt1_value, tmp_value; lvtt1_value = SET_APIC_TIMER_BASE(APIC_TIMER_BASE_DIV) | APIC_LVT_TIMER_PERIODIC | LOCAL_TIMER_VECTOR; apic_write_around(APIC_LVTT, lvtt1_value); /* * Divide PICLK by 16 */ tmp_value = apic_read(APIC_TDCR); apic_write_around(APIC_TDCR, (tmp_value & ~(APIC_TDR_DIV_1 | APIC_TDR_DIV_TMBASE)) | APIC_TDR_DIV_16); apic_write_around(APIC_TMICT, clocks/APIC_DIVISOR); }
void __setup_APIC_LVTT(unsigned int clocks) { unsigned int lvtt_value, tmp_value, ver; ver = GET_APIC_VERSION(apic_read(APIC_LVR)); lvtt_value = APIC_LVT_TIMER_PERIODIC | LOCAL_TIMER_VECTOR; if (!APIC_INTEGRATED(ver)) lvtt_value |= SET_APIC_TIMER_BASE(APIC_TIMER_BASE_DIV); apic_write_around(APIC_LVTT, lvtt_value); /* * Divide PICLK by 16 */ tmp_value = apic_read(APIC_TDCR); apic_write_around(APIC_TDCR, (tmp_value & ~(APIC_TDR_DIV_1 | APIC_TDR_DIV_TMBASE)) | APIC_TDR_DIV_16); apic_write_around(APIC_TMICT, clocks/APIC_DIVISOR); }
/* * This function sets up the local APIC timer, with a timeout of * 'clocks' APIC bus clock. During calibration we actually call * this function twice on the boot CPU, once with a bogus timeout * value, second time for real. The other (noncalibrating) CPUs * call this function only once, with the real, calibrated value. * * We do reads before writes even if unnecessary, to get around the * P5 APIC double write bug. */ static void __setup_APIC_LVTT(unsigned int clocks, int oneshot, int irqen) { unsigned int lvtt_value, tmp_value; lvtt_value = LOCAL_TIMER_VECTOR; if (!oneshot) lvtt_value |= APIC_LVT_TIMER_PERIODIC; else if (boot_cpu_has(X86_FEATURE_TSC_DEADLINE_TIMER)) lvtt_value |= APIC_LVT_TIMER_TSCDEADLINE; if (!lapic_is_integrated()) lvtt_value |= SET_APIC_TIMER_BASE(APIC_TIMER_BASE_DIV); if (!irqen) lvtt_value |= APIC_LVT_MASKED; apic_write(APIC_LVTT, lvtt_value); if (lvtt_value & APIC_LVT_TIMER_TSCDEADLINE) { /* * See Intel SDM: TSC-Deadline Mode chapter. In xAPIC mode, * writing to the APIC LVTT and TSC_DEADLINE MSR isn't serialized. * According to Intel, MFENCE can do the serialization here. */ asm volatile("mfence" : : : "memory"); printk_once(KERN_DEBUG "TSC deadline timer enabled\n"); return; } /* * Divide PICLK by 16 */ tmp_value = apic_read(APIC_TDCR); apic_write(APIC_TDCR, (tmp_value & ~(APIC_TDR_DIV_1 | APIC_TDR_DIV_TMBASE)) | APIC_TDR_DIV_16); if (!oneshot) apic_write(APIC_TMICT, clocks / APIC_DIVISOR); }
static void __setup_APIC_LVTT(unsigned int clocks) { unsigned int lvtt_value, tmp_value, ver; ver = GET_APIC_VERSION(apic_read(APIC_LVR)); /* NB. Xen uses local APIC timer in one-shot mode. */ lvtt_value = /*APIC_TIMER_MODE_PERIODIC |*/ LOCAL_TIMER_VECTOR; if (!APIC_INTEGRATED(ver)) lvtt_value |= SET_APIC_TIMER_BASE(APIC_TIMER_BASE_DIV); if ( tdt_enabled ) { lvtt_value &= (~APIC_TIMER_MODE_MASK); lvtt_value |= APIC_TIMER_MODE_TSC_DEADLINE; } apic_write_around(APIC_LVTT, lvtt_value); tmp_value = apic_read(APIC_TDCR); apic_write_around(APIC_TDCR, (tmp_value | APIC_TDR_DIV_1)); apic_write_around(APIC_TMICT, clocks/APIC_DIVISOR); }