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1 jermar 1
/*
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 * Copyright (C) 2001-2004 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#ifndef __ARCH_H__
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#define __ARCH_H__
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#include <arch/types.h>
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#include <typedefs.h>
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#include <cpu.h>
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#include <arch/cpu.h>
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#include <arch/asm.h> 
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#include <proc/thread.h>
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#include <proc/task.h>
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/*
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 * NOTE:
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 * CPU, THREAD and TASK are not preemption-safe.
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 * Provisions must be made to prevent preemption prior
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 * to using these macros. Simple cpu_priority_high()
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 * call will suffice.
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 */
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#define CPU     (&cpus[CPU_ID_ARCH])
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#define THREAD      (cpu_private_data[CPU_ID_ARCH].thread)
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#define TASK        (cpu_private_data[CPU_ID_ARCH].task)
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/*
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 * For each possible kernel stack, structure
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 * of the following type will be placed at
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 * the bottom of the stack.
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 */
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struct the {
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    int preemption_disabled;
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    thread_t *thread;       /* current thread */
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    task_t *task;           /* current task */
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    cpu_t *cpu;         /* executing cpu */
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};
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#define THE     ((the_t *)(get_stack_base()))   
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extern void arch_pre_mm_init(void);
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extern void arch_post_mm_init(void);
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extern void arch_late_init(void);
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extern void calibrate_delay_loop(void);
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extern pri_t cpu_priority_high(void);
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extern pri_t cpu_priority_low(void);
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extern void cpu_priority_restore(pri_t pri);
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extern pri_t cpu_priority_read(void);
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#endif