| 1 | /*
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| 2 | * Copyright (C) 2001-2004 Jakub Jermar
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | #ifndef __ARCH_H__
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| 30 | #define __ARCH_H__
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| 31 |
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| 32 | #include <arch/types.h>
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| 33 | #include <typedefs.h>
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| 34 |
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| 35 | #include <cpu.h>
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| 36 | #include <arch/cpu.h>
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| 37 | #include <arch/asm.h>
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| 38 |
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| 39 | #include <proc/thread.h>
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| 40 | #include <proc/task.h>
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| 41 |
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| 42 | /*
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| 43 | * NOTE:
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| 44 | * CPU, THREAD and TASK are not preemption-safe.
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| 45 | * Provisions must be made to prevent preemption prior
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| 46 | * to using these macros. Simple cpu_priority_high()
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| 47 | * call will suffice.
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| 48 | */
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| 49 | #define CPU (&cpus[CPU_ID_ARCH])
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| 50 | #define THREAD (cpu_private_data[CPU_ID_ARCH].thread)
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| 51 | #define TASK (cpu_private_data[CPU_ID_ARCH].task)
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| 52 |
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| 53 | /*
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| 54 | * For each possible kernel stack, structure
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| 55 | * of the following type will be placed at
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| 56 | * the bottom of the stack.
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| 57 | */
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| 58 | struct the {
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| 59 | int preemption_disabled;
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| 60 | thread_t *thread; /* current thread */
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| 61 | task_t *task; /* current task */
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| 62 | cpu_t *cpu; /* executing cpu */
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| 63 | };
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| 64 |
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| 65 | #define THE ((the_t *)(get_stack_base()))
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| 66 |
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| 67 | extern void the_initialize(the_t *the);
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| 68 | extern void the_copy(the_t *src, the_t *dst);
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| 69 |
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| 70 | extern void arch_pre_mm_init(void);
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| 71 | extern void arch_post_mm_init(void);
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| 72 | extern void arch_late_init(void);
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| 73 | extern void calibrate_delay_loop(void);
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| 74 |
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| 75 | extern pri_t cpu_priority_high(void);
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| 76 | extern pri_t cpu_priority_low(void);
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| 77 | extern void cpu_priority_restore(pri_t pri);
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| 78 | extern pri_t cpu_priority_read(void);
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| 79 |
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| 80 | #endif
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