/*
 * Copyright (c) 2014-2016 Wind River Systems, Inc.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

/**
 * @file
 * @brief Private kernel definitions
 *
 * This file contains private kernel structures definitions and various
 * other definitions for the ARCv2 processor architecture.
 *
 * This file is also included by assembly language files which must #define
 * _ASMLANGUAGE before including this header file.  Note that kernel
 * assembly source files obtains structure offset values via "absolute
 * symbols" in the offsets.o module.
 */

#ifndef ZEPHYR_ARCH_ARC_INCLUDE_KERNEL_ARCH_FUNC_H_
#define ZEPHYR_ARCH_ARC_INCLUDE_KERNEL_ARCH_FUNC_H_

#if !defined(_ASMLANGUAGE)

#include <kernel_arch_data.h>

#include <v2/irq.h>

#ifdef __cplusplus
extern "C" {
#endif

static ALWAYS_INLINE void arch_kernel_init(void)
{
	z_irq_setup();
}


/**
 *
 * @brief Indicates the interrupt number of the highest priority
 * active interrupt
 *
 * @return IRQ number
 */
static ALWAYS_INLINE int Z_INTERRUPT_CAUSE(void)
{
	uint32_t irq_num = z_arc_v2_aux_reg_read(_ARC_V2_ICAUSE);

	return irq_num;
}

static inline bool arch_is_in_isr(void)
{
	return z_arc_v2_irq_unit_is_in_isr();
}

extern void z_thread_entry_wrapper(void);
extern void z_user_thread_entry_wrapper(void);

extern void z_arc_userspace_enter(k_thread_entry_t user_entry, void *p1,
		 void *p2, void *p3, uint32_t stack, uint32_t size,
		 struct k_thread *thread);

extern void z_arc_fatal_error(unsigned int reason, const struct arch_esf *esf);

extern void z_arc_switch(void *switch_to, void **switched_from);

static inline void arch_switch(void *switch_to, void **switched_from)
{
	z_arc_switch(switch_to, switched_from);
}

#if !defined(CONFIG_MULTITHREADING)
extern FUNC_NORETURN void z_arc_switch_to_main_no_multithreading(
	k_thread_entry_t main_func, void *p1, void *p2, void *p3);

#define ARCH_SWITCH_TO_MAIN_NO_MULTITHREADING \
	z_arc_switch_to_main_no_multithreading

#endif /* !CONFIG_MULTITHREADING */


#ifdef __cplusplus
}
#endif

#endif /* _ASMLANGUAGE */

#endif /* ZEPHYR_ARCH_ARC_INCLUDE_KERNEL_ARCH_FUNC_H_ */