jehanne/sys/src/lib/thread/mips.c

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/*
* This file is part of the UCB release of Plan 9. It is subject to the license
* terms in the LICENSE file found in the top-level directory of this
* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
* part of the UCB release of Plan 9, including this file, may be copied,
* modified, propagated, or distributed except according to the terms contained
* in the LICENSE file.
*/
#include <u.h>
#include <libc.h>
#include <thread.h>
#include "threadimpl.h"
/* first argument goes in a register; simplest just to ignore it */
static void
launchermips(int, void (*f)(void *arg), void *arg)
{
(*f)(arg);
threadexits(nil);
}
void
_threadinitstack(Thread *t, void (*f)(void*), void *arg)
{
uint32_t *tos;
tos = (uint32_t*)&t->stk[t->stksize&~7];
*--tos = (uint32_t)arg;
*--tos = (uint32_t)f;
*--tos = 0; /* first arg to launchermips */
*--tos = 0; /* place to store return PC */
t->sched[JMPBUFPC] = (uint32_t)launchermips+JMPBUFDPC;
t->sched[JMPBUFSP] = (uint32_t)tos;
}