/*
 * Copyright (c) 2018 Intel Corporation
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <ztest.h>
#include <irq_offload.h>
#include <kernel_structs.h>


#if defined(CONFIG_ARM)
#include <arch/arm/cortex_m/cmsis.h>

static u32_t get_available_nvic_line(u32_t initial_offset)
{
	int i;

	for (i = initial_offset - 1; i >= 0; i--) {

		if (NVIC_GetEnableIRQ(i) == 0) {
			/*
			 * Interrupts configured statically with IRQ_CONNECT(.)
			 * are automatically enabled. NVIC_GetEnableIRQ()
			 * returning false, here, implies that the IRQ line is
			 * either not implemented or it is not enabled, thus,
			 * currently not in use by Zephyr.
			 */

			/* Set the NVIC line to pending. */
			NVIC_SetPendingIRQ(i);

			if (NVIC_GetPendingIRQ(i)) {
				/* If the NVIC line is pending, it is
				 * guaranteed that it is implemented.
				 */
				break;
			}
		}
	}

	zassert_true(i >= 0, "No available IRQ line\n");

	return i;
}

static void trigger_irq(int irq)
{
	printk("Triggering irq : %d\n", irq);
#if defined(CONFIG_SOC_TI_LM3S6965_QEMU) || defined(CONFIG_CPU_CORTEX_M0) \
	|| defined(CONFIG_CPU_CORTEX_M0PLUS)
	NVIC_SetPendingIRQ(irq);
#else
	NVIC->STIR = irq;
#endif
}

#elif defined(CONFIG_RISCV)
static void trigger_irq(int irq)
{
	u32_t mip;

	printk("Triggering irq : %d\n", irq);
	__asm__ volatile ("csrrs %0, mip, %1\n"
			: "=r" (mip)
			: "r" (1 << irq));
}

#elif defined(CONFIG_CPU_ARCV2)
static void trigger_irq(int irq)
{
	printk("Triggering irq : %d\n", irq);
	z_arc_v2_aux_reg_write(_ARC_V2_AUX_IRQ_HINT, irq);
}
#else
/* for not supported architecture */
#define NO_TRIGGER_FROM_SW
#endif