/*
 * Copyright (c) 2001-2004 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup generic	
 * @{
 */
/** @file
 */

#ifndef KERN_ARCH_H_
#define KERN_ARCH_H_

#include <arch/arch.h>
#include <proc/thread.h>
#include <proc/task.h>
#include <mm/as.h>

#define DEFAULT_CONTEXT		0

#define CPU			THE->cpu
#define THREAD			THE->thread
#define TASK			THE->task
#define AS			THE->as
#define CONTEXT		(THE->task ? THE->task->context : DEFAULT_CONTEXT)
#define PREEMPTION_DISABLED	THE->preemption_disabled

#define context_check(ctx1, ctx2)	((ctx1) == (ctx2))

/**
 * For each possible kernel stack, structure
 * of the following type will be placed at
 * the base address of the stack.
 */
typedef struct {
	size_t preemption_disabled;	/**< Preemption disabled counter. */
	thread_t *thread;		/**< Current thread. */
	task_t *task;			/**< Current task. */
	cpu_t *cpu;			/**< Executing cpu. */
	as_t *as;			/**< Current address space. */
} the_t;

#define THE  ((the_t * )(get_stack_base()))

extern void the_initialize(the_t *the);
extern void the_copy(the_t *src, the_t *dst);

extern void arch_pre_mm_init(void);
extern void arch_post_mm_init(void);
extern void arch_post_cpu_init(void);
extern void arch_pre_smp_init(void);
extern void arch_post_smp_init(void);

extern void calibrate_delay_loop(void);

extern void reboot(void);
extern void arch_reboot(void);
extern void *arch_construct_function(fncptr_t *fptr, void *addr, void *caller);

#endif

/** @}
 */