/*
 * Copyright (c) 2019 Intel Corporation
 * SPDX-License-Identifier: Apache-2.0
 */

#ifndef ZEPHYR_ARCH_X86_INCLUDE_KERNEL_ARCH_FUNC_H_
#define ZEPHYR_ARCH_X86_INCLUDE_KERNEL_ARCH_FUNC_H_

#include <kernel_arch_data.h>

#ifdef CONFIG_X86_64
#include <intel64/kernel_arch_func.h>
#else
#include <ia32/kernel_arch_func.h>
#endif

#ifndef _ASMLANGUAGE
static inline bool arch_is_in_isr(void)
{
#ifdef CONFIG_SMP
	return arch_curr_cpu()->nested != 0;
#else
	return _kernel.nested != 0U;
#endif
}

/* stack alignment related macros: STACK_ALIGN is defined in arch.h */
#define STACK_ROUND_UP(x) ROUND_UP(x, STACK_ALIGN)
#define STACK_ROUND_DOWN(x) ROUND_DOWN(x, STACK_ALIGN)

extern K_THREAD_STACK_DEFINE(_interrupt_stack, CONFIG_ISR_STACK_SIZE);
extern K_THREAD_STACK_DEFINE(_interrupt_stack1, CONFIG_ISR_STACK_SIZE);
extern K_THREAD_STACK_DEFINE(_interrupt_stack2, CONFIG_ISR_STACK_SIZE);
extern K_THREAD_STACK_DEFINE(_interrupt_stack3, CONFIG_ISR_STACK_SIZE);

struct multiboot_info;

extern FUNC_NORETURN void z_x86_prep_c(int dummy, struct multiboot_info *info);

#ifdef CONFIG_X86_VERY_EARLY_CONSOLE
/* Setup ultra-minimal serial driver for printk() */
void z_x86_early_serial_init(void);
#endif /* CONFIG_X86_VERY_EARLY_CONSOLE */

#ifdef CONFIG_X86_MMU
/* Create all page tables with boot configuration and enable paging */
void z_x86_paging_init(void);
#endif /* CONFIG_X86_MMU */

/* Called upon unrecoverable error; dump registers and transfer control to
 * kernel via z_fatal_error()
 */
FUNC_NORETURN void z_x86_fatal_error(unsigned int reason,
				     const z_arch_esf_t *esf);

/* Common handling for page fault exceptions */
void z_x86_page_fault_handler(z_arch_esf_t *esf);

#ifdef CONFIG_THREAD_STACK_INFO
/**
 * @brief Check if a memory address range falls within the stack
 *
 * Given a memory address range, ensure that it falls within the bounds
 * of the faulting context's stack.
 *
 * @param addr Starting address
 * @param size Size of the region, or 0 if we just want to see if addr is
 *             in bounds
 * @param cs Code segment of faulting context
 * @return true if addr/size region is not within the thread stack
 */
bool z_x86_check_stack_bounds(uintptr_t addr, size_t size, u16_t cs);
#endif /* CONFIG_THREAD_STACK_INFO */
#endif /* !_ASMLANGUAGE */

#endif /* ZEPHYR_ARCH_X86_INCLUDE_KERNEL_ARCH_FUNC_H_ */