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/* SPDX-License-Identifier: copyleft-next-0.3.1 */
/* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */
/**
* @file proc.c
* Process handling, might be merged into \ref src/tcb.c.
*/
#include <kmi/elf.h>
#include <kmi/proc.h>
#include <kmi/conf.h>
#include <kmi/string.h>
#include <kmi/initrd.h>
#include <arch/arch.h>
#include <arch/proc.h>
#include <arch/cpu.h>
stat_t prepare_proc(struct tcb *t, vm_t bin, vm_t interp)
{
vm_t entry = load_elf(t, bin, interp);
if (!entry)
return ERR_INVAL;
alloc_stack(t);
set_thread(t);
set_return(t, entry);
return OK;
}
stat_t init_proc(void *fdt)
{
init_tcbs();
/** \todo cleanup or something */
struct tcb *t = create_proc(NULL);
if (!t)
return ERR_OOMEM;
/* we're the first cpu, so we always have ID 0 */
t->cpu_id = 0;
/* force tcb for core */
tcb_assign(t);
/* set current tcb */
use_tcb(t);
/* init process has all capabilities */
set_caps(t->caps, 0, CAP_CAPS | CAP_PROC | CAP_CALL | CAP_POWER);
t->notify_id = t->tid;
/* allocate stacks after ELF file to make sure nothing of importance
* clashes */
return prepare_proc(t, get_init_base(fdt), 0);
/** \todo start one thread per core, with special handling for init in
* that each thread starts at the entry point of init? */
}
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