125 lines
2.9 KiB
C
125 lines
2.9 KiB
C
/*
|
|
* This file is ripped from x86/mtarch.c of the Contiki Multi-threading library.
|
|
* Fredrik Osterlind <fros@sics.se>
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include "sys/cooja_mt.h"
|
|
|
|
struct frame {
|
|
unsigned long flags;
|
|
unsigned long ebp;
|
|
unsigned long edi;
|
|
unsigned long esi;
|
|
unsigned long edx;
|
|
unsigned long ecx;
|
|
unsigned long ebx;
|
|
unsigned long eax;
|
|
unsigned long retaddr;
|
|
unsigned long retaddr2;
|
|
unsigned long data;
|
|
};
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
void
|
|
cooja_mtarch_init(void)
|
|
{
|
|
|
|
}
|
|
/*--------------------------------------------------------------------------*/
|
|
void
|
|
cooja_mtarch_start(struct cooja_mtarch_thread *t,
|
|
void (*function)(void *), void *data)
|
|
{
|
|
|
|
struct frame *f = (struct frame *)&t->stack[COOJA_MTARCH_STACKSIZE - sizeof(struct frame)/4];
|
|
int i;
|
|
|
|
for(i = 0; i < COOJA_MTARCH_STACKSIZE; ++i) {
|
|
t->stack[i] = i;
|
|
}
|
|
|
|
memset(f, 0, sizeof(struct frame));
|
|
f->retaddr = (unsigned long)function;
|
|
f->data = (unsigned long)data;
|
|
t->sp = (unsigned long)&f->flags;
|
|
f->ebp = (unsigned long)&f->eax;
|
|
}
|
|
/*--------------------------------------------------------------------------*/
|
|
static unsigned long cooja_spsave, cooja_sptmp;
|
|
static struct cooja_mtarch_thread *cooja_running_thread;
|
|
|
|
static void
|
|
cooja_sw(void)
|
|
{
|
|
|
|
asm("pushl %eax");
|
|
asm("pushl %ebx");
|
|
asm("pushl %ecx");
|
|
asm("pushl %edx");
|
|
asm("pushl %esi");
|
|
asm("pushl %edi");
|
|
asm("pushl %ebp");
|
|
// asm("pushl %ebp"); /* XXX: should push FPU flags here. */
|
|
asm("movl %esp, cooja_spsave");
|
|
|
|
cooja_sptmp = cooja_running_thread->sp;
|
|
cooja_running_thread->sp = cooja_spsave;
|
|
|
|
asm("movl cooja_sptmp, %esp");
|
|
// asm("popl %ebp"); /* XXX: should pop FPU flags here. */
|
|
asm("popl %ebp");
|
|
asm("popl %edi");
|
|
asm("popl %esi");
|
|
asm("popl %edx");
|
|
asm("popl %ecx");
|
|
asm("popl %ebx");
|
|
asm("popl %eax");
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
void
|
|
cooja_mtarch_exec(struct cooja_mtarch_thread *t)
|
|
{
|
|
cooja_running_thread = t;
|
|
cooja_sw();
|
|
cooja_running_thread = NULL;
|
|
}
|
|
/*--------------------------------------------------------------------------*/
|
|
void
|
|
cooja_mtarch_remove(void)
|
|
{
|
|
|
|
}
|
|
/*--------------------------------------------------------------------------*/
|
|
void
|
|
cooja_mtarch_yield(void)
|
|
{
|
|
cooja_sw();
|
|
}
|
|
/*--------------------------------------------------------------------------*/
|
|
void
|
|
cooja_mtarch_pstop(void)
|
|
{
|
|
|
|
}
|
|
/*--------------------------------------------------------------------------*/
|
|
void
|
|
cooja_mtarch_pstart(void)
|
|
{
|
|
|
|
}
|
|
/*--------------------------------------------------------------------------*/
|
|
int
|
|
cooja_mtarch_stack_usage(struct cooja_mt_thread *t)
|
|
{
|
|
int i;
|
|
for(i = 0; i < COOJA_MTARCH_STACKSIZE; ++i) {
|
|
if(t->thread.stack[i] != i) {
|
|
return COOJA_MTARCH_STACKSIZE - i;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
/*--------------------------------------------------------------------------*/
|