inc/hf/cpu.h

/*
 * Copyright 2018 The Hafnium Authors.
 *
 * 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 "hf/arch/cpu.h"

/* TODO: Fix alignment such that `cpu` structs are in different cache lines. */
struct cpu {
	/** CPU identifier. Doesn't have to be contiguous. */
	cpu_id_t id;

	/** Pointer to bottom of the stack. */
	void *stack_bottom;

	/** See api.c for the partial ordering on locks. */
	struct spinlock lock;

	/** Determines whether the CPU is currently on. */
	bool is_on;
};

void cpu_module_init(const cpu_id_t *cpu_ids, size_t count);

size_t cpu_index(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(cpu_id_t id);
uint8_t *cpu_get_buffer(struct cpu *c);
uint32_t cpu_get_buffer_size(struct cpu *c);