/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
 * 
 *  http://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.
 */

#ifndef _OS_ARCH_SIM_H
#define _OS_ARCH_SIM_H

#include "mcu/mcu_sim.h"

#ifdef __cplusplus
extern "C" {
#endif

/* CPU status register */
typedef unsigned int os_sr_t;

/* Stack element */
typedef unsigned int os_stack_t;

#define OS_ALIGNMENT (4)
#define OS_STACK_ALIGNMENT (16)

/* Stack sizes for common OS tasks */
#define OS_SANITY_STACK_SIZE (1024)
#define OS_IDLE_STACK_SIZE (1024)

/*
 * The 'sim' architecture-specific code does not have as much control on
 * stack usage as the real embedded architectures.
 *
 * For e.g. the space occupied by the signal handler frame on the task
 * stack is entirely dependent on the host OS.
 *
 * Deal with this by scaling the stack size by a factor of 16. The scaling
 * factor can be arbitrarily large because the stacks are allocated from
 * BSS and thus don't add to either the executable size or resident
 * memory.
 */
#define OS_STACK_ALIGN(__nmemb) \
    (OS_ALIGN(((__nmemb) * 16), OS_STACK_ALIGNMENT))

/* Include common arch definitions and APIs */
#include "os/arch/common.h"

/* sim specific */
struct stack_frame;
void os_arch_frame_init(struct stack_frame *sf);

/* for unittests */
void os_arch_os_stop(void);

#ifdef __cplusplus
}
#endif

#endif /* _OS_ARCH_SIM_H */