98 lines
3.8 KiB
C
98 lines
3.8 KiB
C
/*
|
|
* Copyright (c) 2004, Adam Dunkels.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. 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.
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE OR CONTRIBUTORS 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.
|
|
*
|
|
* This file is part of the Contiki operating system.
|
|
*
|
|
* Author: Adam Dunkels <adam@sics.se>
|
|
*
|
|
* $Id: mtarch.c,v 1.1 2007/05/23 23:11:28 oliverschmidt Exp $
|
|
*/
|
|
#include "mtarch.h"
|
|
#include <string.h>
|
|
|
|
unsigned char mtarch_asm_threadspreg;
|
|
unsigned char *mtarch_asm_threadsp;
|
|
unsigned char *mtarch_asm_threadzp;
|
|
unsigned char *mtarch_asm_threadstack;
|
|
|
|
void mtarch_asm_start(void);
|
|
void mtarch_asm_exec(void);
|
|
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
void
|
|
mtarch_start(struct mtarch_thread *thread,
|
|
void (* function)(void *data),
|
|
void *data)
|
|
{
|
|
memset(thread->cpustack, 0, sizeof(thread->cpustack));
|
|
memset(thread->cstack, 0, sizeof(thread->cstack));
|
|
|
|
/* Create a CPU stack frame with the appropriate values... */
|
|
thread->cpustack[MTARCH_CPUSTACKSIZE - 2] = ((unsigned short)function) >> 8; /* high byte of return address. */
|
|
thread->cpustack[MTARCH_CPUSTACKSIZE - 3] = ((unsigned short)function) & 0xff; /* low byte of return address. */
|
|
thread->cpustack[MTARCH_CPUSTACKSIZE - 4] = 0x21; /* processor flags. */
|
|
thread->cpustack[MTARCH_CPUSTACKSIZE - 5] = /* a register */
|
|
thread->cpustack[MTARCH_CPUSTACKSIZE - 6] = /* x register */
|
|
thread->cpustack[MTARCH_CPUSTACKSIZE - 7] = 0; /* y register */
|
|
thread->spreg = MTARCH_CPUSTACKSIZE - 8;
|
|
|
|
/* Setup the C stack with the data pointer. */
|
|
thread->sp = &thread->cstack[MTARCH_CSTACKSIZE - 1];
|
|
|
|
mtarch_asm_threadzp = &(thread->zp);
|
|
mtarch_asm_start();
|
|
}
|
|
/*--------------------------------------------------------------------------*/
|
|
void
|
|
mtarch_exec(struct mtarch_thread *thread)
|
|
{
|
|
/* Switch processor stack. The call to mtarch_asm_switch() will not
|
|
return until the process that we switch to calls yield(). */
|
|
mtarch_asm_threadspreg = thread->spreg;
|
|
mtarch_asm_threadsp = thread->sp;
|
|
|
|
mtarch_asm_threadstack = &(thread->cpustack[0]);
|
|
mtarch_asm_threadzp = &(thread->zp[0]);
|
|
|
|
mtarch_asm_exec();
|
|
|
|
thread->sp = mtarch_asm_threadsp;
|
|
thread->spreg = mtarch_asm_threadspreg;
|
|
}
|
|
/*--------------------------------------------------------------------------*/
|
|
void
|
|
mtarch_init(void) {
|
|
|
|
}
|
|
/*--------------------------------------------------------------------------*/
|
|
void
|
|
mtarch_remove(void)
|
|
{
|
|
|
|
}
|