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/*

 * 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.

 */

#ifndef __ARCH_H__

#define __ARCH_H__

#include <arch/types.h>

#include <typedefs.h>

#include <cpu.h>

#include <arch/cpu.h>

#include <arch/asm.h> 

#define CPU         THE->cpu

#define THREAD          THE->thread

#define TASK            THE->task

#define VM          THE->vm

#define PREEMPTION_DISABLED THE->preemption_disabled

#ifndef early_mapping

#define early_mapping(stack, size)

#endif /* early_mapping */

/**

 * For each possible kernel stack, structure

 * of the following type will be placed at

 * the bottom of the stack.

 */

struct the {

    count_t preemption_disabled;    /**< Preemption disabled counter. */

    thread_t *thread;       /**< Current thread. */

    task_t *task;           /**< Current task. */

    cpu_t *cpu;         /**< Executing cpu. */

    vm_t *vm;           /**< Current vm. */

};

#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_pre_smp_init(void);

extern void arch_post_smp_init(void);

extern void calibrate_delay_loop(void);

extern ipl_t interrupts_disable(void);

extern ipl_t interrupts_enable(void);

extern void interrupts_restore(ipl_t ipl);

extern ipl_t interrupts_read(void);

#endif