dac2857229
Move the ksCurTime assertions out of setDeadline, because they are not necessarily true there. Assert ksCurTime in setNextInterrupt instead. We only know that the deadline being set is at least ksCurTime - getTimerPrecision(), which can be slightly in the past (ksCurTime is already slightly in the past, at kernel entry). Signed-off-by: Gerwin Klein <gerwin.klein@proofcraft.systems>
60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
/*
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* Copyright 2020, Data61, CSIRO (ABN 41 687 119 230)
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*
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* SPDX-License-Identifier: GPL-2.0-only
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*/
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#pragma once
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#include <config.h>
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#include <mode/machine.h>
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/* ARM generic timer implementation */
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#ifdef CONFIG_KERNEL_MCS
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#include <model/statedata.h>
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#include <api/types.h>
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/** DONT_TRANSLATE **/
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static inline ticks_t getCurrentTime(void)
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{
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ticks_t time;
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SYSTEM_READ_64(CNT_CT, time);
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return time;
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}
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/** DONT_TRANSLATE **/
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static inline void setDeadline(ticks_t deadline)
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{
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SYSTEM_WRITE_64(CNT_CVAL, deadline);
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}
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static inline void ackDeadlineIRQ(void)
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{
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ticks_t deadline = UINT64_MAX;
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setDeadline(deadline);
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/* Ensure that the timer deasserts the IRQ before GIC EOIR/DIR.
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* This is sufficient to remove the pending state from the GICR
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* and avoid the interrupt happening twice because of the level
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* sensitive configuration. */
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isb();
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}
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#else /* CONFIG_KERNEL_MCS */
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#include <arch/machine/timer.h>
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static inline void resetTimer(void)
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{
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SYSTEM_WRITE_WORD(CNT_TVAL, TIMER_RELOAD);
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/* Ensure that the timer deasserts the IRQ before GIC EOIR/DIR.
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* This is sufficient to remove the pending state from the GICR
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* and avoid the interrupt happening twice because of the level
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* sensitive configuration. */
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isb();
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}
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#endif /* !CONFIG_KERNEL_MCS */
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BOOT_CODE void initGenericTimer(void);
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#ifdef CONFIG_ARM_HYPERVISOR_SUPPORT
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static uint64_t read_cntpct(void) UNUSED;
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static void save_virt_timer(vcpu_t *vcpu);
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static void restore_virt_timer(vcpu_t *vcpu);
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#endif /* CONFIG_ARM_HYPERVISOR_SUPPORT */
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