kernel/generic/include/arch.h

   1 /*
   2  * Copyright (C) 2001-2004 Jakub Jermar
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * - Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright
  12  *   notice, this list of conditions and the following disclaimer in the
  13  *   documentation and/or other materials provided with the distribution.
  14  * - The name of the author may not be used to endorse or promote products
  15  *   derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 /** @addtogroup generic
  30  * @{
  31  */
  32 /** @file
  33  */
  34
  35 #ifndef KERN_ARCH_H_
  36 #define KERN_ARCH_H_
  37
  38 #include <arch/types.h>
  39 #include <arch/arch.h>
  40 #include <typedefs.h>
  41
  42 #include <cpu.h>
  43 #include <arch/cpu.h>
  44 #include <arch/asm.h>
  45
  46 #define DEFAULT_CONTEXT         0
  47
  48 #define CPU                     THE->cpu
  49 #define THREAD                  THE->thread
  50 #define TASK                    THE->task
  51 #define AS                      THE->as
  52 #define CONTEXT         (THE->task ? THE->task->context : DEFAULT_CONTEXT)
  53 #define PREEMPTION_DISABLED     THE->preemption_disabled
  54
  55 #define context_check(ctx1, ctx2)       ((ctx1) == (ctx2))
  56
  57 /**
  58  * For each possible kernel stack, structure
  59  * of the following type will be placed at
  60  * the base address of the stack.
  61  */
  62 struct the {
  63         count_t preemption_disabled;    /**< Preemption disabled counter. */
  64         thread_t *thread;               /**< Current thread. */
  65         task_t *task;                   /**< Current task. */
  66         cpu_t *cpu;                     /**< Executing cpu. */
  67         as_t *as;                       /**< Current address space. */
  68 };
  69
  70 #define THE             ((the_t *)(get_stack_base()))
  71
  72 extern void the_initialize(the_t *the);
  73 extern void the_copy(the_t *src, the_t *dst);
  74
  75 extern void arch_pre_main(void);
  76 extern void arch_pre_mm_init(void);
  77 extern void arch_post_mm_init(void);
  78 extern void arch_post_cpu_init(void);
  79 extern void arch_pre_smp_init(void);
  80 extern void arch_post_smp_init(void);
  81 extern void calibrate_delay_loop(void);
  82
  83 #endif
  84
  85 /** @}
  86  */