/*
 * Copyright (c) 2016 Intel Corporation
 *
 * 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
 *
 *     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.
 */

/**
 * @file
 * @brief Nios II specific nanokernel interface header
 * This header contains the Nios II specific nanokernel interface.  It is
 * included by the generic nanokernel interface header (nanokernel.h)
 */

#ifndef _ARCH_IFACE_H
#define _ARCH_IFACE_H

#include <system.h>
#include "nios2.h"

#ifdef __cplusplus
extern "C" {
#endif

#define STACK_ALIGN  4

#define _NANO_ERR_HW_EXCEPTION (0)      /* MPU/Bus/Usage fault */
#define _NANO_ERR_INVALID_TASK_EXIT (1) /* Invalid task exit */
#define _NANO_ERR_STACK_CHK_FAIL (2)    /* Stack corruption detected */
#define _NANO_ERR_ALLOCATION_FAIL (3)   /* Kernel Allocation Failure */

#ifndef _ASMLANGUAGE
#include <stdint.h>
#include <irq.h>
#include <arch/nios2/asm_inline.h>

/* STUB. Eventually port ARC/ARM interrupt stuff */
#define _ARCH_IRQ_CONNECT(irq_p, priority_p, isr_p, isr_param_p, flags_p)

static ALWAYS_INLINE unsigned int _arch_irq_lock(void)
{
	/* STUB */

	return 0;
}

static ALWAYS_INLINE void _arch_irq_unlock(unsigned int key)
{
	/* STUB */
	ARG_UNUSED(key);
}

int _arch_irq_connect_dynamic(unsigned int irq, unsigned int priority,
			      void (*routine)(void *parameter), void *parameter,
			      uint32_t flags);
void _arch_irq_enable(unsigned int irq);
void _arch_irq_disable(unsigned int irq);

struct __esf {
	/* XXX - not defined yet */
	uint32_t placeholder;
};

typedef struct __esf NANO_ESF;
extern const NANO_ESF _default_esf;

FUNC_NORETURN void _SysFatalErrorHandler(unsigned int reason,
					 const NANO_ESF *esf);

#endif /* _ASMLANGUAGE */

#ifdef __cplusplus
}
#endif

#endif