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/*
* Copyright (c) 2012, 2013 Richard Braun.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <kern/init.h>
#include <kern/macros.h>
#include <kern/param.h>
#include <machine/cpu.h>
#include <machine/strace.h>
#include <machine/tcb.h>
/*
* Low level functions.
*/
void __noreturn tcb_context_load(struct tcb *tcb);
void __noreturn tcb_start(void);
void
tcb_init(struct tcb *tcb, void *stack, void (*fn)(void))
{
void **ptr;
tcb->bp = 0;
tcb->sp = (unsigned long)stack + STACK_SIZE - sizeof(unsigned long);
tcb->ip = (unsigned long)tcb_start;
ptr = (void **)tcb->sp;
*ptr = fn;
}
void __init
tcb_load(struct tcb *tcb)
{
assert(!cpu_intr_enabled());
tcb_set_current(tcb);
tcb_context_load(tcb);
}
void
tcb_trace(const struct tcb *tcb)
{
strace_show(tcb->ip, tcb->bp);
}
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