/*
* 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 kernel_generic
* @{
*/
/** @file
*/
#ifndef KERN_ARCH_H_
#define KERN_ARCH_H_
#include <config.h>
/** Return the current_t structure
*
* The current_t structure holds pointers to various parts of the current
* execution state, like running task, thread, address space, etc.
*
* The current_t structure is located at the base address of the current
* stack. The stack is assumed to be STACK_SIZE bytes long. The stack base
* address must be aligned to STACK_SIZE.
*
*/
#define CURRENT \
((current_t *) (((uintptr_t) __builtin_frame_address(0)) & \
(~((uintptr_t) STACK_SIZE - 1))))
#define MAGIC UINT32_C(0xfacefeed)
#define container_check(ctn1, ctn2) ((ctn1) == (ctn2))
#define DEFAULT_CONTAINER 0
#define CONTAINER \
((CURRENT->task) ? (CURRENT->task->container) : (DEFAULT_CONTAINER))
/* Fwd decl. to avoid include hell. */
struct thread;
struct task;
struct cpu;
struct as;
/** Current structure
*
* 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; /**< Preemption disabled counter and flag. */
size_t mutex_locks;
struct thread *thread; /**< Current thread. */
struct task *task; /**< Current task. */
struct cpu *cpu; /**< Executing CPU. */
struct as *as; /**< Current address space. */
uint32_t magic; /**< Magic value. */
} current_t;
typedef struct {
void (*pre_mm_init)(void);
void (*post_mm_init)(void);
void (*post_cpu_init)(void);
void (*pre_smp_init)(void);
void (*post_smp_init)(void);
} arch_ops_t;
extern arch_ops_t *arch_ops;
#define ARCH_STRUCT_OP(s, op) \
do { \
if ((s)->op) \
(s)->op(); \
} while (0)
#define ARCH_OP(op) ARCH_STRUCT_OP(arch_ops, op)
extern void current_initialize(current_t *);
extern void current_copy(current_t *, current_t *);
extern void calibrate_delay_loop(void);
extern void reboot(void);
extern void arch_reboot(void);
extern void *arch_construct_function(fncptr_t *, void *, void *);
#endif
/** @}
*/