blob: 60261febf79b8c905db9b897e5582bec6c2be8d5 [file] [log] [blame]
/*
* Copyright 2018 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include "hf/arch/cpu.h"
#include "hf/addr.h"
#include "hf/spinlock.h"
enum vcpu_state {
/** The vcpu is switched off. */
vcpu_state_off,
/** The vcpu is ready to be run. */
vcpu_state_ready,
/** The vcpu is currently running. */
vcpu_state_running,
/** The vcpu is waiting for a message. */
vcpu_state_blocked_mailbox,
/** The vcpu is waiting for an interrupt. */
vcpu_state_blocked_interrupt,
};
struct vcpu {
struct spinlock lock;
enum vcpu_state state;
struct cpu *cpu;
struct vm *vm;
struct vcpu *mailbox_next;
struct arch_regs regs;
};
/* TODO: Update alignment such that cpus are in different cache lines. */
struct cpu {
/** CPU identifier. Doesn't have to be contiguous. */
size_t id;
/** Pointer to bottom of the stack. */
void *stack_bottom;
/**
* Enabling/disabling irqs are counted per-cpu. They are enabled when
* the count is zero, and disabled when it's non-zero.
*/
uint32_t irq_disable_count;
struct spinlock lock;
/** Determines whether or not the cpu is currently on. */
bool is_on;
};
void cpu_module_init(void);
void cpu_init(struct cpu *c);
size_t cpu_index(struct cpu *c);
void cpu_irq_enable(struct cpu *c);
void cpu_irq_disable(struct cpu *c);
bool cpu_on(struct cpu *c, ipaddr_t entry, uintreg_t arg);
void cpu_off(struct cpu *c);
struct cpu *cpu_find(size_t id);
void vcpu_init(struct vcpu *vcpu, struct vm *vm);
void vcpu_on(struct vcpu *vcpu);
void vcpu_off(struct vcpu *vcpu);
size_t vcpu_index(struct vcpu *vcpu);