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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/arm64/vmm/io/vtimer.h
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/*-

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 * SPDX-License-Identifier: BSD-2-Clause

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 *

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 * Copyright (c) 2017 The FreeBSD Foundation

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 *

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 * Redistribution and use in source and binary forms, with or without

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 * modification, are permitted provided that the following conditions

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 * are met:

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 * 1. Redistributions of source code must retain the above copyright

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 *    notice, this list of conditions and the following disclaimer.

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 * 2. Redistributions in binary form must reproduce the above copyright

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 *    notice, this list of conditions and the following disclaimer in the

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 *    documentation and/or other materials provided with the distribution.

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 * 3. The name of the company nor the name of the author may be used to

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 *    endorse or promote products derived from this software without specific

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 *    prior written permission.

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 *

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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

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 * SUCH DAMAGE.

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 */

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#ifndef _VMM_VTIMER_H_

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#define _VMM_VTIMER_H_

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#define	GT_PHYS_NS_IRQ	30

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#define	GT_VIRT_IRQ	27

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struct hyp;

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struct hypctx;

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struct vtimer {

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	uint64_t	cnthctl_el2;

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	uint64_t	cntvoff_el2;

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};

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struct vtimer_timer {

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	struct callout	callout;

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	struct mtx	mtx;

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	uint32_t	irqid;

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	/*

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	 * These registers are either emulated for the physical timer, or

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	 * the guest has full access to them for the virtual timer.

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	 * CNTx_CTL_EL0:  Counter-timer Timer Control Register

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	 * CNTx_CVAL_EL0: Counter-timer Timer CompareValue Register

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	 */

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	uint64_t	cntx_cval_el0;

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	uint64_t	cntx_ctl_el0;

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};

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struct vtimer_cpu {

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	struct vtimer_timer phys_timer;

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	struct vtimer_timer virt_timer;

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	uint32_t	cntkctl_el1;

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};

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int 	vtimer_init(void);

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void 	vtimer_vminit(struct hyp *);

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void 	vtimer_cpuinit(struct hypctx *);

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void 	vtimer_cpucleanup(struct hypctx *);

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void	vtimer_vmcleanup(struct hyp *);

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void	vtimer_cleanup(void);

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void	vtimer_sync_hwstate(struct hypctx *hypctx);

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int 	vtimer_phys_ctl_read(struct vcpu *vcpu, uint64_t *rval, void *arg);

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int 	vtimer_phys_ctl_write(struct vcpu *vcpu, uint64_t wval, void *arg);

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int 	vtimer_phys_cnt_read(struct vcpu *vcpu, uint64_t *rval, void *arg);

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int 	vtimer_phys_cnt_write(struct vcpu *vcpu, uint64_t wval, void *arg);

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int 	vtimer_phys_cval_read(struct vcpu *vcpu, uint64_t *rval, void *arg);

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int 	vtimer_phys_cval_write(struct vcpu *vcpu, uint64_t wval, void *arg);

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int 	vtimer_phys_tval_read(struct vcpu *vcpu, uint64_t *rval, void *arg);

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int 	vtimer_phys_tval_write(struct vcpu *vcpu, uint64_t wval, void *arg);

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#endif

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